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Prof. Rasikh Tariq
Universidad Autonoma de Yucatan

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0 Desalination
0 Life Cycle Assessment
0 Solar Energy
0 Thermal Engineering
0 Artifical Intelligence

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Journal article
Published: 30 January 2021 in Renewable and Sustainable Energy Reviews
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In the coming decades, a large portion of the world population is expected to embrace urbanization. The demand for thermal comfort in populous and congested urban centres, especially in developing countries across the globe, is expected to rise many folds. Alternates to conventional air-cooling systems are water-based evaporation cooling. Recently introduced efficient multi-stage indirect evaporative cooling using the Maisotsenko(M)-Cycle has shown success with improved performance by theoretically reaching the dew-point of the incoming air. However, the impact of large-scale use of such cooling devices shall inadvertently leave huge strains on the urban useable water resources. On the other hand, cooling, as usual, is not sustainable with the global demand for air cooling units shall grow many folds up to 5.0 billion units over the next decade compared to currently 1.3 billion in service units. Alternates of high electricity consuming air cooling, such as Maisotsenko cycle based devices are part of the solution only if the water impact can be brought to minimal in an efficient manner. A key development in this regard is the utilization of water recovery systems from waste air streams leaving air coolers. A few studies and models have shown their successful working and predictions. This paper initially analyzes the global impacts of air-cooling devices using the commercially available product designed to work on the Maisotsenko cycle. Moreover, the impact of these devices on the global scale in terms of utility as well as their water footprints are estimated. The results produce a grim picture since most favourable zones/regions in the globe for indirect evaporative cooling are also labelled as high on the water stress index. Secondly, global assessment of water recovery unit in terms of reduction in water footprint and combined cooling and recovery system Energy Efficiency Ratio (EER) are also assessed. Based on the assessments and predictions of global economic parameters, a wholesome Levelized Cost of Electricity of combined air cooling and water recovery system is estimated for each zone across the globe favourable for the Maisotsenko cycle based air cooler. The hypothesis postulate that the global projections of the energy-efficiency-ratio should be improved while diminishing its water footprints at a lower Levelized cost. The prime purpose of the research is to evaluate the technological advancement presented in the commercial M50 air cooler for energetic, economical, and water-related indicators with the consideration of global projections in similitude to the social contexts of the region. Our hypothesis is verified with our assessment and the principal results have suggested that recovering the water from M-50 cooler, a commercially available device working on M-Cycle, yields in the reduction of specific water usage per ton of air cooling by ~63% while the EER improved by ~26% as compared to the conventional air cooling and the Levelized Cost of energy is 0.014 USD/kWh which is much lower than the conventional air conditioning systems. The findings of this article have concluded that proposed technological advancement has better performance indicators, suiting the complicated local context, and it is suggested/recommended to the governments (especially the Middle East, South Asian, Central Asian, North African, and Australia) to include such natural air coolers (particularly M-Cycle machines) in the national energy efficiency plans to meet the global sustainability targets of United Nations.

ACS Style

Rasikh Tariq; Nadeem Ahmed Sheikh; A. Livas-García; J. Xamán; A. Bassam; Valeriy Maisotsenko. Projecting global water footprints diminution of a dew-point cooling system: Sustainability approach assisted with energetic and economic assessment. Renewable and Sustainable Energy Reviews 2021, 140, 110741 .

AMA Style

Rasikh Tariq, Nadeem Ahmed Sheikh, A. Livas-García, J. Xamán, A. Bassam, Valeriy Maisotsenko. Projecting global water footprints diminution of a dew-point cooling system: Sustainability approach assisted with energetic and economic assessment. Renewable and Sustainable Energy Reviews. 2021; 140 ():110741.

Chicago/Turabian Style

Rasikh Tariq; Nadeem Ahmed Sheikh; A. Livas-García; J. Xamán; A. Bassam; Valeriy Maisotsenko. 2021. "Projecting global water footprints diminution of a dew-point cooling system: Sustainability approach assisted with energetic and economic assessment." Renewable and Sustainable Energy Reviews 140, no. : 110741.

Journal article
Published: 25 December 2020 in Mathematics
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Water desalination presents a need to address the growing water-energy nexus. In this work, a literature survey is carried out, along an application of a mathematical model is presented to enhance the freshwater productivity rate of a solar-assisted humidification-dehumidification (HDH) type of desalination system. The prime novelty of this work is to recover the waste heat by reusing the feedwater at the exit of the condenser in the brackish water storage tank and to carry out the analysis of its effectiveness in terms of the system’s yearly thermoeconomics. The developed mathematical model for each of the components of the plant is solved through an iterative procedure. In a parametric study, the influence of mass flow rates (MFRs) of inlet air, saline water, feedwater, and air temperature on the freshwater productivity is shown with and without the waste heat recovery from the condensing coil. It is reported that the production rate of water is increased to a maximum of 15% by recovering the waste heat. Furthermore, yearly analysis has shown that the production rate of water is increased to a maximum of 16% for June in the location of Taxila, Pakistan. An analysis is also carried out on the economics of the proposed modification, which shows that the cost per litre of the desalinated water is reduced by ~13%. It is concluded that the water productivity of an HDH solar desalination plant can be significantly increased by recovering the waste heat from the condensing coil.

ACS Style

Rasikh Tariq; Jacinto Torres Jimenez; Nadeem Ahmed Sheikh; Sohail Khan. Mathematical Approach to Improve the Thermoeconomics of a Humidification Dehumidification Solar Desalination System. Mathematics 2020, 9, 33 .

AMA Style

Rasikh Tariq, Jacinto Torres Jimenez, Nadeem Ahmed Sheikh, Sohail Khan. Mathematical Approach to Improve the Thermoeconomics of a Humidification Dehumidification Solar Desalination System. Mathematics. 2020; 9 (1):33.

Chicago/Turabian Style

Rasikh Tariq; Jacinto Torres Jimenez; Nadeem Ahmed Sheikh; Sohail Khan. 2020. "Mathematical Approach to Improve the Thermoeconomics of a Humidification Dehumidification Solar Desalination System." Mathematics 9, no. 1: 33.

Journal article
Published: 29 September 2020 in Energies
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This study focused on investigating the bottoming power cycles operating with CO2-based binary mixture, taking into account exergetic, economic and exergo-environmental impact indices. The main intent is to assess the benefits of employing a CO2-based mixture working fluid in closed Brayton bottoming power cycles in comparison with pure CO2 working fluid. Firstly, selection criteria for the choice of suitable additive compound for CO2-based binary mixture is delineated and the composition of the binary mixture is decided based on required cycle minimum temperature. The decided CO2-C7H8 binary mixture with a 0.9 mole fraction of CO2 is analyzed in two cycle configurations: Simple regenerative cycle (SRC) and Partial heating cycle (PHC). Comparative analysis among two configurations with selected working fluid are carried out. Thermodynamic analyses at varying cycle pressure ratio shows that cycle with CO2-C7H8 mixture shows maximum power output and exergy efficiency at rather higher cycle pressure ratio compared to pure CO2 power cycles. PHC with CO2-C7H8 mixture shows 28.68% increment in exergy efficiency with the levelized cost of electricity (LCOE) 21.62% higher than pure CO2 PHC. Whereas, SRC with CO2-C7H8 mixture shows 25.17% increment in exergy efficiency with LCOE 57.14% higher than pure CO2 SRC. Besides showing lower economic value, cycles with a CO2-C7H8 mixture saves larger CO2 emissions and also shows greater exergo-environmental impact improvement and plant sustainability index.

ACS Style

Muhammad Haroon; Nadeem Ahmed Sheikh; Abubakr Ayub; Rasikh Tariq; Farooq Sher; Aklilu Tesfamichael Baheta; Muhammad Imran. Exergetic, Economic and Exergo-Environmental Analysis of Bottoming Power Cycles Operating with CO2-Based Binary Mixture. Energies 2020, 13, 5080 .

AMA Style

Muhammad Haroon, Nadeem Ahmed Sheikh, Abubakr Ayub, Rasikh Tariq, Farooq Sher, Aklilu Tesfamichael Baheta, Muhammad Imran. Exergetic, Economic and Exergo-Environmental Analysis of Bottoming Power Cycles Operating with CO2-Based Binary Mixture. Energies. 2020; 13 (19):5080.

Chicago/Turabian Style

Muhammad Haroon; Nadeem Ahmed Sheikh; Abubakr Ayub; Rasikh Tariq; Farooq Sher; Aklilu Tesfamichael Baheta; Muhammad Imran. 2020. "Exergetic, Economic and Exergo-Environmental Analysis of Bottoming Power Cycles Operating with CO2-Based Binary Mixture." Energies 13, no. 19: 5080.

Journal article
Published: 10 September 2020 in Sustainability
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Sustainable development is an integrated blend of energetic, economic, social, environmental, and governmental actors, making it one of the most challenging and subjective aims of the United Nations. A sustainability project that does not consider any of these parameters can generate resistance among different actors of society. In this work, we have demonstrated that the traditional definition of sustainability encompassing economic development, environmental protection, and social justice does not adequately cover large-scale renewable energy projects. We have presented an illuminating case study of solar development in the Yucatan state of Mexico to show that the traditional three-legged stool of sustainable development fails to accommodate local power relations and their role in energy decision-making. This point is made through a substantive and illuminating ethnography of a solar project in the community of San José Tipceh, which involves the importance of energy democracy and understanding power relations in any assessment of sustainable development. These power relations are an important component of sustainable development, and all megaprojects, especially renewable energy projects, require special attention in the governance processes. Through an analysis of an example of implementation of a mega solar project, we argue that the methodology through which the power is exercised is an exercise of great importance because it leads us to a scientific discussion that structures an international reflection on sustainability. The case study consists of mixed methods, including several techniques to deepen the analysis of sociocultural aspects, and tries to present the limits and show the weakness of the sustainability perspective in such megaprojects. It is concluded that environmental justice as a basic element of the new era of renewable energies is limited and can generate social injustices. In the same way, this work shows how power is exercised in the implementation of energy projects and in the absence of equitable comprehensive governance that does not consider the local sociocultural contexts of the communities, resulting in the generation of new powers and permanent conflicts. At the end of this work, a framework to empower local sociocultural contexts for an equitable energy transition is recommended.

ACS Style

Amina El Mekaoui; Rasikh Tariq; Othón Ramírez; P.E. Méndez-Monroy. Sustainability, Sociocultural Challenges, and New Power of Capitalism for Renewable Energy Megaprojects in an Indigenous Mayan Community of Mexico. Sustainability 2020, 12, 7432 .

AMA Style

Amina El Mekaoui, Rasikh Tariq, Othón Ramírez, P.E. Méndez-Monroy. Sustainability, Sociocultural Challenges, and New Power of Capitalism for Renewable Energy Megaprojects in an Indigenous Mayan Community of Mexico. Sustainability. 2020; 12 (18):7432.

Chicago/Turabian Style

Amina El Mekaoui; Rasikh Tariq; Othón Ramírez; P.E. Méndez-Monroy. 2020. "Sustainability, Sociocultural Challenges, and New Power of Capitalism for Renewable Energy Megaprojects in an Indigenous Mayan Community of Mexico." Sustainability 12, no. 18: 7432.

Journal article
Published: 25 July 2020 in Energy
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The integration of a photovoltaic-thermal-air collector with phase changing material is subjected to local climatic dynamics. The prime novelty of this work is to include the climatic dynamics for the selection of phase changing material specifically applied for Mexico and to analyze the system based on multidimensional parameters. In other words, the main achievement of this work is to present an energetically, exergetically, and economically viable PVT assembly with phase changing material depending on the weather dynamics. The yearly equivalent analysis is carried out for three different climatic zones within the Köppen classification (Aw, BSh, and Cwb) to select the optimal phase-changing material. Fifteen multidimensional performance indicators are analyzed which are based on energy, exergy, exergetic sustainability, life cycle CO2 emissions, enviroeconomic, exergoenvironmental, and economic analysis. The results have shown that a temperature decrement as high as ∼20% can be attained for the best-selected phase-changing material. The electrical, thermal and exergetic efficiency ranges from ∼8 to ∼11%, 25–∼33% and ∼13–∼17% respectively. The carbon pricing factor ranges from $20.00-$32.00 MXN per year. For the life cycle cost analysis, the local inflation, and the discount rate is considered. The Levelized Cost of energy ranges from $3.09 MXN/(kWh) to $4.30 MXN/(kWh) and the payback period ranges from ∼10 to ∼15 years.

ACS Style

Rasikh Tariq; J. Xamán; A. Bassam; Luis J. Ricalde; M.A. Escalante Soberanis. Multidimensional assessment of a photovoltaic air collector integrated phase changing material considering Mexican climatic conditions. Energy 2020, 209, 118304 .

AMA Style

Rasikh Tariq, J. Xamán, A. Bassam, Luis J. Ricalde, M.A. Escalante Soberanis. Multidimensional assessment of a photovoltaic air collector integrated phase changing material considering Mexican climatic conditions. Energy. 2020; 209 ():118304.

Chicago/Turabian Style

Rasikh Tariq; J. Xamán; A. Bassam; Luis J. Ricalde; M.A. Escalante Soberanis. 2020. "Multidimensional assessment of a photovoltaic air collector integrated phase changing material considering Mexican climatic conditions." Energy 209, no. : 118304.

Article
Published: 21 February 2020 in International Journal of Thermophysics
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In this work, an empirical correlation to predict the thermal conductivity of CuO-water nanofluid is developed. The prime novelty of this work is to include the size of the nanoparticles and to utilize the techniques of artificial intelligence on this problem. The experimentation is carried out for the following operating range: working temperature between 302 K to 323 K, particle volume fraction between 0.1 % and 0.4 %, and a particle diameter of 40 nm and 80 nm. The results of the experimentation are benchmarked with the standard properties of water. Afterwards, three different data-driven techniques (SRM, GMDH and ANN) are applied for the correlation development of thermal conductivity. It is reported that GMDH of third polynomial power is the most appropriate yielding an R2 of 0.99973, SSE of 2.208834e−06, and MSE of 1.004e−08. Extensive external validation is also carried out on these techniques to ensure the correctness of the methodology. The results of these surrogate models are compared with other models based on their performance indices of regression. Another comparative study has shown that the prediction capability of our proposed regression model has a minimum deviation of ~ 0.35 % and a maximum deviation of ~ 3.7 %.

ACS Style

Rasikh Tariq; Yasir Hussain; Nadeem Sheikh; Kamran Afaq; Hafiz Muhammad Ali. Regression-Based Empirical Modeling of Thermal Conductivity of CuO-Water Nanofluid using Data-Driven Techniques. International Journal of Thermophysics 2020, 41, 1 -28.

AMA Style

Rasikh Tariq, Yasir Hussain, Nadeem Sheikh, Kamran Afaq, Hafiz Muhammad Ali. Regression-Based Empirical Modeling of Thermal Conductivity of CuO-Water Nanofluid using Data-Driven Techniques. International Journal of Thermophysics. 2020; 41 (4):1-28.

Chicago/Turabian Style

Rasikh Tariq; Yasir Hussain; Nadeem Sheikh; Kamran Afaq; Hafiz Muhammad Ali. 2020. "Regression-Based Empirical Modeling of Thermal Conductivity of CuO-Water Nanofluid using Data-Driven Techniques." International Journal of Thermophysics 41, no. 4: 1-28.

Journal article
Published: 01 October 2019 in Energy Conversion and Management
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ACS Style

Rasikh Tariq; Ali Sohani; J. Xamán; Hoseyn Sayyaadi; Ali Bassam; Oscar May Tzuc. Multi-objective optimization for the best possible thermal, electrical and overall energy performance of a novel perforated-type regenerative evaporative humidifier. Energy Conversion and Management 2019, 198, 1 .

AMA Style

Rasikh Tariq, Ali Sohani, J. Xamán, Hoseyn Sayyaadi, Ali Bassam, Oscar May Tzuc. Multi-objective optimization for the best possible thermal, electrical and overall energy performance of a novel perforated-type regenerative evaporative humidifier. Energy Conversion and Management. 2019; 198 ():1.

Chicago/Turabian Style

Rasikh Tariq; Ali Sohani; J. Xamán; Hoseyn Sayyaadi; Ali Bassam; Oscar May Tzuc. 2019. "Multi-objective optimization for the best possible thermal, electrical and overall energy performance of a novel perforated-type regenerative evaporative humidifier." Energy Conversion and Management 198, no. : 1.

Journal article
Published: 27 January 2019 in Building and Environment
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In this work, an opportunity to improve the seasonal utilizability of an indirect evaporative cooler integrated air-conditioning system is presented. The improved design recovers the waste heat from wet air passages by supplying them to the comfort zone of produce commodities whilst supplying the dry air to human-occupants-comfort-zone i.e. operating for dual purposes. The analysis is carried out for three different configurations of indirect evaporative cooler namely counter-arrangement, cross-arrangement, and multi-zonal (advanced) heat and mass exchanging devices. The performance of each integrated air-conditioning system is presented in terms of a ‘special’ mixing ratio, system capacity, and energy-efficiency-ratio. Results have shown that the waste heat from the wet passages can be exploited and the seasonal utilizability factors of the proposed air-conditioning system can reach up to 1.41, 1.13 and 1.34 for counter, cross, and multi-zonal indirect-evaporative coolers respectively. Afterwards, the system analysis for different climatic conditions has shown that it offers high performance in desert and semi-arid regions.

ACS Style

Rasikh Tariq; Nadeem Sheikh; J. Xamán; A. Bassam. Recovering waste energy in an indirect evaporative cooler – A case for combined space air conditioning for human occupants and produce commodities. Building and Environment 2019, 152, 105 -121.

AMA Style

Rasikh Tariq, Nadeem Sheikh, J. Xamán, A. Bassam. Recovering waste energy in an indirect evaporative cooler – A case for combined space air conditioning for human occupants and produce commodities. Building and Environment. 2019; 152 ():105-121.

Chicago/Turabian Style

Rasikh Tariq; Nadeem Sheikh; J. Xamán; A. Bassam. 2019. "Recovering waste energy in an indirect evaporative cooler – A case for combined space air conditioning for human occupants and produce commodities." Building and Environment 152, no. : 105-121.

Original
Published: 27 November 2018 in Heat and Mass Transfer
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Maisotsenko Humid Air Bottoming Cycle (MHABC) is a viable option for the waste heat recovery of gas turbine topping cycle to attain a higher efficiency point of the combined cycle power plant; thus, having a potential of lower CO2 emissions towards environment. In this work, instead of the typically proposed counter flow configuration of the air saturator, a novel mixed flow configuration is proposed. The proposed configuration uses a hybrid cross-flow and a regenerative counter-flow heat and mass exchanger (HMX). This hybrid HMX is numerically simulated to estimate optimal amount of saturated air which can lead to maximum efficiency and power output. The mathematical model of the mixed flow configuration HMX based air saturator is developed by applying mass and energy balance laws on a selected control volume. The results of the air saturator are initially validated using previously published experimental data for air cooling applications. Furthermore, simulations for high-pressure operations suitable for power generation are performed and a parametric analysis shows that optimal mass flow rate ratio between the working air in the dry channel and incoming air for cross-flow part is 0.65. Optimal mass flow ratio between the working air wet channel and working air dry channel for the counter-flow part is 0.5. The integration of hybrid air saturator in MHABC can yield a maximum of ~57 MW of output work and ~42% of thermal efficiency. The proposed system can achieve a 7% increment in total output work, and 9% increment in thermal efficiency as compared to the counter-flow configuration as an air saturator in the bottoming cycle. Furthermore, the proposed system has ~55% fewer carbon footprint as compared to counter-flow configuration alone as an air saturator.

ACS Style

Rasikh Tariq; Nadeem Ahmed Sheikh; A. Bassam; J. Xamán. Analysis of Maisotsenko humid air bottoming cycle employing mixed flow air saturator. Heat and Mass Transfer 2018, 55, 1477 -1489.

AMA Style

Rasikh Tariq, Nadeem Ahmed Sheikh, A. Bassam, J. Xamán. Analysis of Maisotsenko humid air bottoming cycle employing mixed flow air saturator. Heat and Mass Transfer. 2018; 55 (5):1477-1489.

Chicago/Turabian Style

Rasikh Tariq; Nadeem Ahmed Sheikh; A. Bassam; J. Xamán. 2018. "Analysis of Maisotsenko humid air bottoming cycle employing mixed flow air saturator." Heat and Mass Transfer 55, no. 5: 1477-1489.

Journal article
Published: 05 October 2018 in Energies
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The incorporation of a Maisotsenko (M) Cycle into an indirect evaporative cooler has led to the achievement of sub-wet bulb temperature without any humidification, thus making it a possible green and sustainable alternative for handling the cooling load of a building. In this work, the thermal performance of a cross-flow heat and mass exchanger (HMX) is enhanced by the addition of nanoparticles in the wet channel because they significantly influence the heat and mass transfer characteristics of the base fluid. A governing model for the temperature and humidity variations of the HMX is numerically simulated. Initial benchmarking is achieved using water properties. Afterward, a comparative study is conducted using aluminum-oxide-, copper-oxide-, and titanium-oxide-based nanofluids. Enhancements of 24.2% in heat flux, 19.24% in wet bulb effectiveness, 7.04% in dew point effectiveness, 29.66% in cooling capacity, and 28.43% in energy efficiency ratio are observed by using alumina-based nanofluid as compared to water in the wet channel of the cross-flow HMX. Furthermore, a particle volume concentration of 1% and a particle diameter of 20nm are recommended for maximum performance.

ACS Style

Rasikh Tariq; Changhong Zhan; Nadeem Ahmed Sheikh; Xudong Zhao. Thermal Performance Enhancement of a Cross-Flow-Type Maisotsenko Heat and Mass Exchanger Using Various Nanofluids. Energies 2018, 11, 2656 .

AMA Style

Rasikh Tariq, Changhong Zhan, Nadeem Ahmed Sheikh, Xudong Zhao. Thermal Performance Enhancement of a Cross-Flow-Type Maisotsenko Heat and Mass Exchanger Using Various Nanofluids. Energies. 2018; 11 (10):2656.

Chicago/Turabian Style

Rasikh Tariq; Changhong Zhan; Nadeem Ahmed Sheikh; Xudong Zhao. 2018. "Thermal Performance Enhancement of a Cross-Flow-Type Maisotsenko Heat and Mass Exchanger Using Various Nanofluids." Energies 11, no. 10: 2656.

Conference paper
Published: 01 September 2018 in 2018 International Conference on Applied and Engineering Mathematics (ICAEM)
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In this work, an experimental study is carried out by using CuO based nanofluid in four different configurations of some common heat exchangers including shell-and-tube type, concentric, spiral and plate heat exchanger for the counter-flow arrangement. Necessary equipment, instrumentation, data-acquisition module and nanofluid preparation method is described. The experimental setup is benchmarked using water in both hot and cold fluid channels by validating its results with results reported in the literature. Afterwards, nanofluid is used in the hot fluid chamber and tap water is used for cold fluid for each of the heat exchangers. The analysis is carried out for three different concentrations of the nanofluid including 0.2%, 0.4%, and 0.6% of CuO. The influence of nanofluid on the heat transfer from the hot fluid chamber and effectiveness is reported experimentally for three volume fractions. A ~21% enhancement of heat transfer in concentric, shell-and-tube, and spiral heat exchanger; whereas, a 26% enhancement is observed in plate heat exchanger. This research identifies an important avenue towards a more compact design of new heat exchangers, and heat transfer enhancement of existing heat exchangers.

ACS Style

Tayyab- Ul- Islam; Rasikh Tariq; Kamran Afaq Sheikh; Muhammad Shayyan. Study of Thermal Performance of Common Heat Exchangers by Using Nanofluids. 2018 International Conference on Applied and Engineering Mathematics (ICAEM) 2018, 130 -135.

AMA Style

Tayyab- Ul- Islam, Rasikh Tariq, Kamran Afaq Sheikh, Muhammad Shayyan. Study of Thermal Performance of Common Heat Exchangers by Using Nanofluids. 2018 International Conference on Applied and Engineering Mathematics (ICAEM). 2018; ():130-135.

Chicago/Turabian Style

Tayyab- Ul- Islam; Rasikh Tariq; Kamran Afaq Sheikh; Muhammad Shayyan. 2018. "Study of Thermal Performance of Common Heat Exchangers by Using Nanofluids." 2018 International Conference on Applied and Engineering Mathematics (ICAEM) , no. : 130-135.

Conference paper
Published: 01 September 2018 in 2018 International Conference on Applied and Engineering Mathematics (ICAEM)
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In this work, an analysis is carried out for the thermophysical properties including thermal conductivity, and viscosity of aluminum oxide-water nanofluid for different particle volume concentration and temperature. The analysis is carried out using previously developed correlations of viscosity and thermal conductivity. A strong dependence of thermophysical properties with particle volume fraction and temperature is reported. The key thermo-physical property i.e. thermal conductivity of nanoparticle-water blend shows a linear behavior with the increase in particle volume fraction. Furthermore, the other thermo-physical property i.e. viscosity of nanoparticle-water blend shows a linear increasing behavior with the increment in the particle vnlume fraction.

ACS Style

Muhammad Yasir Hussain; Rasikh Tariq; Kamran Afaq Sheikh. Performance Assessment of an Al2O3-Water Nanofluid in Terms of Thermophsyical Properties. 2018 International Conference on Applied and Engineering Mathematics (ICAEM) 2018, 1 -5.

AMA Style

Muhammad Yasir Hussain, Rasikh Tariq, Kamran Afaq Sheikh. Performance Assessment of an Al2O3-Water Nanofluid in Terms of Thermophsyical Properties. 2018 International Conference on Applied and Engineering Mathematics (ICAEM). 2018; ():1-5.

Chicago/Turabian Style

Muhammad Yasir Hussain; Rasikh Tariq; Kamran Afaq Sheikh. 2018. "Performance Assessment of an Al2O3-Water Nanofluid in Terms of Thermophsyical Properties." 2018 International Conference on Applied and Engineering Mathematics (ICAEM) , no. : 1-5.

Conference paper
Published: 01 September 2018 in 2018 International Conference on Applied and Engineering Mathematics (ICAEM)
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In this work, an energy analysis of a dew point air cooler is presented by a numerical formulation of the physical phenomena related to the hybrid configuration of air cooler. The physical phenomena consist of complex and coupled heat and mass transfer process whereas, the performance is gauged based on supply air temperature, cooling capacity, cooling effectiveness and coefficient of performance. It is reported that the hybrid flow plate heat and mass exchanger can achieve a sub-wet-bulb temperature of 22.5°C for an inlet temperature of 35°C having an absolute humidity of -15g/kg. For the input conditions, the wet-bulb effectiveness of the system is ~1.2, the dew point effectiveness is 0.8, the cooling capacity is ~0.4 tons, and the coefficient of performance is 3.5. It is concluded that M-Cycle based evaporative cooling systems are possible replica of vapor-compression-refrigeration machines to meet building cooling requirement.

ACS Style

Rasikh Tariq; S.M. Aneeq Khan; Syed Sajid Raza Zaidi; Hafiz Abdullah Zafar. Energy Analysis of a Coupled Heat and Mass Transfer Phenomenon for Dew Point Air Coolers. 2018 International Conference on Applied and Engineering Mathematics (ICAEM) 2018, 42 -47.

AMA Style

Rasikh Tariq, S.M. Aneeq Khan, Syed Sajid Raza Zaidi, Hafiz Abdullah Zafar. Energy Analysis of a Coupled Heat and Mass Transfer Phenomenon for Dew Point Air Coolers. 2018 International Conference on Applied and Engineering Mathematics (ICAEM). 2018; ():42-47.

Chicago/Turabian Style

Rasikh Tariq; S.M. Aneeq Khan; Syed Sajid Raza Zaidi; Hafiz Abdullah Zafar. 2018. "Energy Analysis of a Coupled Heat and Mass Transfer Phenomenon for Dew Point Air Coolers." 2018 International Conference on Applied and Engineering Mathematics (ICAEM) , no. : 42-47.

Journal article
Published: 06 July 2018 in Applied Energy
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In this work, an innovative and novel integrated Maisotsenko cycle-based air saturator is proposed as a humidifier in humidification-dehumidification type desalination system. The proposed system has unique flow characteristic within the heat and mass exchanger to maximize air saturation at the exit of humidifier; thus, maximizing the potential for desalination. The process of air saturation in the wet channel is altered by including an infiltration flow from the dry passes on to the wet passes of the air saturator. A detailed mathematical model is developed and solved through an iterative procedure, and the performance of the system is deduced based on fresh water production rate, recovery ratio, and gain-output-ratio. It is reported that in the proposed design an infiltration rate of 0.6 corresponds to maximum water evaporation rate and justified pump and blower work. Comparative analysis has shown that the proposed novel system configuration offers 30% higher fresh water productivity, 46% higher recovery ratio, and 11% higher gain-output-ratio as compared to conventional direct-contact humidifier-based desalination plant. Performance investigation analysis is carried out for 31 different cities of the world to determine the applicability of the proposed system under different climatic conditions. Economic estimation has shown that the cost of desalinated water using proposed system is 0.030 USD/liter which is 14% lower than the conventional humidification-dehumidification desalination system. Furthermore, environmental analysis has shown that the proposed system has ∼7% lower carbon footprints. It is concluded that the proposed system offers energy-efficient, cost-effective and environmental friendly method of desalination and can be used in most parts of the world.

ACS Style

Rasikh Tariq; Nadeem Sheikh; J. Xamán; A. Bassam. An innovative air saturator for humidification-dehumidification desalination application. Applied Energy 2018, 228, 789 -807.

AMA Style

Rasikh Tariq, Nadeem Sheikh, J. Xamán, A. Bassam. An innovative air saturator for humidification-dehumidification desalination application. Applied Energy. 2018; 228 ():789-807.

Chicago/Turabian Style

Rasikh Tariq; Nadeem Sheikh; J. Xamán; A. Bassam. 2018. "An innovative air saturator for humidification-dehumidification desalination application." Applied Energy 228, no. : 789-807.

Journal article
Published: 01 July 2018 in Journal of Renewable and Sustainable Energy
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For developing a sustainable power system, the key is to maximize the use of available resources with a minimal impact on the environment. One technique for achieving this is exhaust heat recovery. In this paper, three gas turbine exhaust heat recovery supercritical carbon dioxide combined power cycles are presented. They are combined gas turbine-recompression cycle, combined gas turbine-preheating cycle, and combined gas turbine-simple regenerative cycle. For all the cycles, thermodynamic models are developed and the influence of varying mass flow rates, compression ratio, and mass split/recompression percentages in different components of all three cycles are investigated. Using genetic algorithm, exergetic optimization is done to find the optimal configuration for each cycle. The reduction in CO2 emissions in presented cycles against fossil fuel power cycles is also assessed. Additionally, a comparison with a simple gas turbine (SGT) and an air bottoming combined cycle (ABC) is presented. The results indicate that owing to exhaust exergy recovery, there is a significant improvement in the energetic and exergetic performance of combined gas turbine-supercritical CO2 power cycles compared to that of SGT and ABC. The sum of exergy destruction and exergy loss in the combined cycles is lower as compared to the sum in SGT. The reduction in losses compared to SGT is 22.89% in the case of the combined gas turbine recompression cycle and 35.8% in the case of the combined gas turbine preheating cycle (CGTPHC). Moreover, the energetic and exergetic performances of the bottoming supercritical CO2 recompression cycles (BRECs) are better than those of the bottoming supercritical CO2 preheating cycle owing to lower exergy destruction in the components of BREC. As a result of comparative analysis based on the exergetic performance and environmental impact, the CGTPHC is selected as an appropriate option for gas turbine exhaust exergy recovery.

ACS Style

Abubakr Ayub; Nadeem Ahmed Sheikh; Rasikh Tariq; Muhammad Mahabat Khan; Costante Mario Invernizzi. Exergetic optimization and comparison of combined gas turbine supercritical CO2 power cycles. Journal of Renewable and Sustainable Energy 2018, 10, 044703 .

AMA Style

Abubakr Ayub, Nadeem Ahmed Sheikh, Rasikh Tariq, Muhammad Mahabat Khan, Costante Mario Invernizzi. Exergetic optimization and comparison of combined gas turbine supercritical CO2 power cycles. Journal of Renewable and Sustainable Energy. 2018; 10 (4):044703.

Chicago/Turabian Style

Abubakr Ayub; Nadeem Ahmed Sheikh; Rasikh Tariq; Muhammad Mahabat Khan; Costante Mario Invernizzi. 2018. "Exergetic optimization and comparison of combined gas turbine supercritical CO2 power cycles." Journal of Renewable and Sustainable Energy 10, no. 4: 044703.

Journal article
Published: 01 July 2018 in Journal of Renewable and Sustainable Energy
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ACS Style

Hafiz Abdullah Zafar; Muhammad Yasin Khan; Abdul Waheed Badar; Rasikh Tariq; Fahad Sarfraz Butt. Introducing a novel design in the realm of box type solar cookers: An experimental study. Journal of Renewable and Sustainable Energy 2018, 10, 043707 .

AMA Style

Hafiz Abdullah Zafar, Muhammad Yasin Khan, Abdul Waheed Badar, Rasikh Tariq, Fahad Sarfraz Butt. Introducing a novel design in the realm of box type solar cookers: An experimental study. Journal of Renewable and Sustainable Energy. 2018; 10 (4):043707.

Chicago/Turabian Style

Hafiz Abdullah Zafar; Muhammad Yasin Khan; Abdul Waheed Badar; Rasikh Tariq; Fahad Sarfraz Butt. 2018. "Introducing a novel design in the realm of box type solar cookers: An experimental study." Journal of Renewable and Sustainable Energy 10, no. 4: 043707.

Journal article
Published: 07 April 2018 in Energy and Buildings
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The use of Maisotsenko Cycle (M-Cycle) has enhanced the domain of evaporative cooling technologies to sub-wet bulb temperature cooling while ensuring moisture control. Several studies have demonstrated the use of cross-flow heat & mass exchanger (HMX) offers higher cooling capacity; however, it has lower cooling effectiveness and Energy Efficiency Ratio (EER). In contrast, a counter-flow (HMX) offers high cooling effectiveness with lower cooling capacity. In this paper, the performance of counter-flow HMX is enhanced by addition of alumina nanoparticles in feed water due to enhanced heat and mass transfer characteristics of nanofluids compared to original base fluid. Here, a mathematical model is formulated by incorporating the nanofluids in a selected control volume. The developed model is solved numerically on a discretized HMX length. Initially, the model is benchmarked against previously published results using water as base fluid. A comparison between HMX performance using water and alumina nanofluid is performed in terms of Performance Enhancement Ratio (PER). PER indicates 1–18% increase in cooling effectiveness, 18–43% increase in cooling capacity and 9–19% increase in EER by using alumina in water when working air temperature is increased from 20°C to 45°C. Similarly, an increase in PER is also observed by changing air velocity. Increase of 41% is observed in cooling capacity and 18% increase in EER is observed by changing particle volume fraction from 0 to 2%. This research identifies ways to reduce the carbon emissions of a building by increasing the energy efficiency of existing evaporative cooling technology using nanofluids.

ACS Style

Rasikh Tariq; Changhong Zhan; Xudong Zhao; Nadeem Sheikh. Numerical study of a regenerative counter flow evaporative cooler using alumina nanoparticles in wet channel. Energy and Buildings 2018, 169, 430 -443.

AMA Style

Rasikh Tariq, Changhong Zhan, Xudong Zhao, Nadeem Sheikh. Numerical study of a regenerative counter flow evaporative cooler using alumina nanoparticles in wet channel. Energy and Buildings. 2018; 169 ():430-443.

Chicago/Turabian Style

Rasikh Tariq; Changhong Zhan; Xudong Zhao; Nadeem Sheikh. 2018. "Numerical study of a regenerative counter flow evaporative cooler using alumina nanoparticles in wet channel." Energy and Buildings 169, no. : 430-443.

Journal article
Published: 01 March 2018 in Applied Thermal Engineering
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ACS Style

Rasikh Tariq; Nadeem Ahmed Sheikh. Numerical heat transfer analysis of Maisotsenko Humid Air Bottoming Cycle – A study towards the optimization of the air-water mixture at bottoming turbine inlet. Applied Thermal Engineering 2018, 133, 49 -60.

AMA Style

Rasikh Tariq, Nadeem Ahmed Sheikh. Numerical heat transfer analysis of Maisotsenko Humid Air Bottoming Cycle – A study towards the optimization of the air-water mixture at bottoming turbine inlet. Applied Thermal Engineering. 2018; 133 ():49-60.

Chicago/Turabian Style

Rasikh Tariq; Nadeem Ahmed Sheikh. 2018. "Numerical heat transfer analysis of Maisotsenko Humid Air Bottoming Cycle – A study towards the optimization of the air-water mixture at bottoming turbine inlet." Applied Thermal Engineering 133, no. : 49-60.

Conference paper
Published: 01 November 2017 in 2017 International Conference on Energy Conservation and Efficiency (ICECE)
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Maisotsenko Cycle (M-Cycle) is a recently patented and novel thermodynamic cycle which utilizes the renewable latent heat of evaporation of humid air to attain a temperature below the wet-bulb. In contrast, existing evaporative cooling methods can only cool an air to around its wet-bulb temperature. However, the modification in an indirect evaporative cooler has enabled to obtain a temperature below its wet bulb temperature, and towards its dew point temperature. Two types of heat and mass exchangers (HMXes) are under extensive research for air conditioning applications specifically based on M-Cycle applications, namely, counter and cross-flow HMXes. In this research paper, a comparative performance study of both heat exchangers is presented based on their cooling effectiveness, Coefficient of Performance (COP), and cooling capacity. For both types of HMX, balances of mass, momentum and energy are computed. The resulting coupled ordinary differential equations with coupled boundary conditions are discretized using first order accurate finite difference numerical formulation. The governing equations are simulated using purposely developed code. Validation is obtained by comparing the predicted results with experimental studies of HMX in both flow configurations. Results are presented by varying ambient temperature, humidity, and flow rate. It is concluded that a cross flow HMX is more viable for commercial use because of its ease of construction and higher COP values, whereas, a counter flow HMX offers more cooling effectiveness.

ACS Style

Rasikh Tariq; Nadeem Ahmed Sheikh. Maisotsenko cycle based counter and cross flow heat and mass exchanger: A computational study. 2017 International Conference on Energy Conservation and Efficiency (ICECE) 2017, 44 -49.

AMA Style

Rasikh Tariq, Nadeem Ahmed Sheikh. Maisotsenko cycle based counter and cross flow heat and mass exchanger: A computational study. 2017 International Conference on Energy Conservation and Efficiency (ICECE). 2017; ():44-49.

Chicago/Turabian Style

Rasikh Tariq; Nadeem Ahmed Sheikh. 2017. "Maisotsenko cycle based counter and cross flow heat and mass exchanger: A computational study." 2017 International Conference on Energy Conservation and Efficiency (ICECE) , no. : 44-49.