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Dr. Muhammad Imtiaz Hussain
Green Energy Technology Research Center, Kongju National University, Cheonan 1223-24, Korea

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Research Keywords & Expertise

0 photovoltaic/thermal (PV/T) systems
0 Concentrating solar power technologies
0 Energy self-sufficient building
0 High- and medium-temperature solar thermal energy storage
0 Nanotechnology and nano-enhanced PCMs

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photovoltaic/thermal (PV/T) systems

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Research article
Published: 10 May 2021 in International Journal of Green Energy
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The academic institute, a huge consumer of energy, is still depending upon the grid and/or conventional fuel despite having potential areas of a solar PV installation. No such study has been reported in Nepal which has techno-economically discussed the potential use of academic institute rooftops for solar PV installation. In this study, we have investigated the techno-economic and environmental assessment of a 1 megawatt (MW) rooftop solar PV using PVsyst for Purwanchal Campus, Nepal. It has been estimated the plant will produce about 1,660 MWh of usable AC electricity annually and out of which 95% can be supplied to the grid. The remaining can fulfill the demand of the campus at sunshine hours. For this, a capital investment of about USD 961,404 is needed for the plant with an annual operating cost of USD 8,008. This project gives a 190% return of investment within its life of 25 years with a Levelized cost of energy (LCOE) of 0.069 USD/kWh. The performance ratio and payback period of the project are calculated at about 0.765 and 8.4 years, respectively. The system will produce about 97% less emission than that of diesel generator, which is currently being used for power backup. It is concluded that a 1 MW grid-connected solar PV system is feasible for the studied campus.

ACS Style

Bhola Paudel; Niraj Regmi; Parlad Phuyal; Deependra Neupane; M. Imtiaz Hussain; Dae Hyun Kim; Sagar Kafle. Techno-economic and environmental assessment of utilizing campus building rooftops for solar PV power generation. International Journal of Green Energy 2021, 1 -13.

AMA Style

Bhola Paudel, Niraj Regmi, Parlad Phuyal, Deependra Neupane, M. Imtiaz Hussain, Dae Hyun Kim, Sagar Kafle. Techno-economic and environmental assessment of utilizing campus building rooftops for solar PV power generation. International Journal of Green Energy. 2021; ():1-13.

Chicago/Turabian Style

Bhola Paudel; Niraj Regmi; Parlad Phuyal; Deependra Neupane; M. Imtiaz Hussain; Dae Hyun Kim; Sagar Kafle. 2021. "Techno-economic and environmental assessment of utilizing campus building rooftops for solar PV power generation." International Journal of Green Energy , no. : 1-13.

Journal article
Published: 05 March 2021 in Sustainability
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Poultry are one of the most vulnerable species of its kind once the temperature-humidity nexus is explored. This is so because the broilers lack sweat glands as compared to humans and undergo panting process to mitigate their latent heat (moisture produced in the body) in the air. As a result, moisture production inside poultry house needs to be maintained to avoid any serious health and welfare complications. Several strategies such as compressor-based air-conditioning systems have been implemented worldwide to attenuate the heat stress in poultry, but these are not economical. Therefore, this study focuses on the development of low-cost and environmentally friendly improved evaporative cooling systems (DEC, IEC, MEC) from the viewpoint of heat stress in poultry houses. Thermodynamic analysis of these systems was carried out for the climatic conditions of Multan, Pakistan. The results appreciably controlled the environmental conditions which showed that for the months of April, May, and June, the decrease in temperature by direct evaporative cooling (DEC), indirect evaporative cooling (IEC), and Maisotsenko-Cycle evaporative cooling (MEC) systems is 7–10 °C, 5–6.5 °C, and 9.5–12 °C, respectively. In case of July, August, and September, the decrease in temperature by DEC, IEC, and MEC systems is 5.5–7 °C, 3.5–4.5 °C, and 7–7.5 °C, respectively. In addition, drop in temperature-humidity index (THI) values by DEC, IEC, and MEC is 3.5–9 °C, 3–7 °C, and 5.5–10 °C, respectively for all months. Optimum temperature and relative humidity conditions are determined for poultry birds and thereby, systems’ performance is thermodynamically evaluated for poultry farms from the viewpoint of THI, temperature-humidity-velocity index (THVI), and thermal exposure time (ET). From the analysis, it is concluded that MEC system performed relatively better than others due to its ability of dew-point cooling and achieved THI threshold limit with reasonable temperature and humidity indexes.

ACS Style

Khawar Shahzad; Muhammad Sultan; Muhammad Bilal; Hadeed Ashraf; Muhammad Farooq; Takahiko Miyazaki; Uzair Sajjad; Imran Ali; Muhammad Hussain. Experiments on Energy-Efficient Evaporative Cooling Systems for Poultry Farm Application in Multan (Pakistan). Sustainability 2021, 13, 2836 .

AMA Style

Khawar Shahzad, Muhammad Sultan, Muhammad Bilal, Hadeed Ashraf, Muhammad Farooq, Takahiko Miyazaki, Uzair Sajjad, Imran Ali, Muhammad Hussain. Experiments on Energy-Efficient Evaporative Cooling Systems for Poultry Farm Application in Multan (Pakistan). Sustainability. 2021; 13 (5):2836.

Chicago/Turabian Style

Khawar Shahzad; Muhammad Sultan; Muhammad Bilal; Hadeed Ashraf; Muhammad Farooq; Takahiko Miyazaki; Uzair Sajjad; Imran Ali; Muhammad Hussain. 2021. "Experiments on Energy-Efficient Evaporative Cooling Systems for Poultry Farm Application in Multan (Pakistan)." Sustainability 13, no. 5: 2836.

Journal article
Published: 16 November 2020 in Sustainability
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This study summarizes the performance of a photovoltaic/thermal (PV/T) system integrated with a glass-to-PV backsheet (PVF film-based backsheet) and glass-to-glass photovoltaic (PV) cells protections. A dual-fluid heat exchanger is used to cool the PV cells in which water and air are operated simultaneously. The proposed PV/T design brings about a higher electric output while producing sufficient thermal energy. A detailed numerical study was performed by calculating real-time heat transfer coefficients. Energy balance equations across the dual-fluid PV/T system were solved using an ordinary differential equation (ODE) solver in MATLAB software. The hourly and annual energy and exergy variations for both configurations were evaluated for Cheonan City, Korea. In the case of a PV/T system with a glass-to-glass configuration, a larger heat exchange area causes the extraction of extra solar heat from the PV cells and thus improving the overall efficiency of the energy transfer. Results depict that the annual electrical and total thermal efficiencies with a glass-to-glass configuration were found to be 14.31% and 52.22%, respectively, and with a glass-to-PV backsheet configuration, the aforementioned values reduced to 13.92% and 48.25%, respectively. It is also observed that, with the application of a dual-fluid heat exchanger, the temperature gradient across the PV panel is surprisingly reduced.

ACS Style

M. Hussain; Jun-Tae Kim. Performance Evaluation of Photovoltaic/Thermal (PV/T) System Using Different Design Configurations. Sustainability 2020, 12, 9520 .

AMA Style

M. Hussain, Jun-Tae Kim. Performance Evaluation of Photovoltaic/Thermal (PV/T) System Using Different Design Configurations. Sustainability. 2020; 12 (22):9520.

Chicago/Turabian Style

M. Hussain; Jun-Tae Kim. 2020. "Performance Evaluation of Photovoltaic/Thermal (PV/T) System Using Different Design Configurations." Sustainability 12, no. 22: 9520.

Journal article
Published: 14 August 2020 in Applied Sciences
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Integration of a dual-fluid heat exchanger with a photovoltaic/thermal (PV/T) system has become increasingly important because it not only significantly reduces the photovoltaic (PV) solar cells’ temperature but also produces additional thermal energy. In this study, energy, exergy, and economic analyses of a dual-fluid (water/air) PV/T system are performed in comparison with a reference PV module and single-fluid PV/T systems for the climate of Cheonan, South Korea. Daily and yearly performance evaluations of all of the aforementioned PV/T systems were carried out through experimentation. Based on the experimental findings, the economic feasibility of the dual-fluid PV/T system is assessed in the context of its financial benefits over both a shorter and longer period of time. Results show that the energy and exergy efficiencies of the dual-fluid PV/T system are significantly higher than those of single-fluid PV/T systems, by 20% and 11%, respectively. In addition, relevant to local domestic electricity price, the cost of energy is reduced by 80%, 60%, and 45% with the dual-fluid PV/T system and water and air type PV/T systems, respectively. Furthermore, using the dual-fluid PV/T system, extra revenue is generated through carbon credit by mitigating CO2 emissions into the atmosphere.

ACS Style

Muhammad Imtiaz Hussain; Jun-Tae Kim. Outdoor Testing to Compare the Technical and Economic Aspects of Single-and Dual-Fluid Photovoltaic/Thermal (PV/T) Systems. Applied Sciences 2020, 10, 5641 .

AMA Style

Muhammad Imtiaz Hussain, Jun-Tae Kim. Outdoor Testing to Compare the Technical and Economic Aspects of Single-and Dual-Fluid Photovoltaic/Thermal (PV/T) Systems. Applied Sciences. 2020; 10 (16):5641.

Chicago/Turabian Style

Muhammad Imtiaz Hussain; Jun-Tae Kim. 2020. "Outdoor Testing to Compare the Technical and Economic Aspects of Single-and Dual-Fluid Photovoltaic/Thermal (PV/T) Systems." Applied Sciences 10, no. 16: 5641.

Journal article
Published: 26 July 2019 in TURKISH JOURNAL OF ELECTRICAL ENGINEERING & COMPUTER SCIENCES
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ACS Style

Rehan Majeed; Danial Saleem; M. Imtiaz Hussain; Muhammad Talha Gul; Muhammad Rehan Usman; Salman Majeed. A quasi-Z-source active neutral point clamped inverter topology employingsymmetrical/unsymmetrical boost modulation control scheme for renewableenergy resources. TURKISH JOURNAL OF ELECTRICAL ENGINEERING & COMPUTER SCIENCES 2019, 27, 3114 -3137.

AMA Style

Rehan Majeed, Danial Saleem, M. Imtiaz Hussain, Muhammad Talha Gul, Muhammad Rehan Usman, Salman Majeed. A quasi-Z-source active neutral point clamped inverter topology employingsymmetrical/unsymmetrical boost modulation control scheme for renewableenergy resources. TURKISH JOURNAL OF ELECTRICAL ENGINEERING & COMPUTER SCIENCES. 2019; 27 (4):3114-3137.

Chicago/Turabian Style

Rehan Majeed; Danial Saleem; M. Imtiaz Hussain; Muhammad Talha Gul; Muhammad Rehan Usman; Salman Majeed. 2019. "A quasi-Z-source active neutral point clamped inverter topology employingsymmetrical/unsymmetrical boost modulation control scheme for renewableenergy resources." TURKISH JOURNAL OF ELECTRICAL ENGINEERING & COMPUTER SCIENCES 27, no. 4: 3114-3137.

Articles
Published: 04 March 2019 in Journal of Asian Architecture and Building Engineering
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In this study, a point focused concentrating photovoltaic (CPV/T) system is built and tested for building integration applications. The main focus of this research is to evaluate the economic viability of a CPV/T system as a replacement of electricity and natural gas for building heating. The performance of a CPV/T system for the top floor apartment heating was analyzed under very cold winter condition of South Korea. The apartment heating load was calculated via the EnergPlus® simulation software. The results show that for some months the CPV/T system can solely meet apartment heating requirements with zero auxiliary energy consumption. By utilizing a CPV/T system for apartment heating instead of using electricity and natural gas, the life cycle savings (LCS) were 2891 $ and 2370 $, respectively. It is also found that by considering 25 years of expected service life of the CPV/T system, its discounted payback period (DPP) based on electricity and natural gas were 12 and 15 years, respectively. It is concluded that the CPV/T system yield the best higher-energy saving efficiency and building heating performance.

ACS Style

M. Imtiaz Hussain; Jun-Tae Kim. Energy and economic potential of a concentrated photovoltaic/thermal (CPV/T) system for buildings in South Korea. Journal of Asian Architecture and Building Engineering 2019, 18, 139 -144.

AMA Style

M. Imtiaz Hussain, Jun-Tae Kim. Energy and economic potential of a concentrated photovoltaic/thermal (CPV/T) system for buildings in South Korea. Journal of Asian Architecture and Building Engineering. 2019; 18 (2):139-144.

Chicago/Turabian Style

M. Imtiaz Hussain; Jun-Tae Kim. 2019. "Energy and economic potential of a concentrated photovoltaic/thermal (CPV/T) system for buildings in South Korea." Journal of Asian Architecture and Building Engineering 18, no. 2: 139-144.

Journal article
Published: 26 February 2019 in Energies
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A limited number of studies have examined the effect of dual-fluid heat exchangers used for the cooling of photovoltaic (PV) cells. The current study suggests an explicit dynamic model for a dual-fluid photovoltaic/thermal (PV/T) system that uses nanofluid and air simultaneously. Mathematical modeling and a CFD simulation were performed using MATLAB® and ANSYS FLUENT® software, respectively. An experimental validation of the numerical models was performed using the results from the published study. Additionally, to identify the optimal nanofluid type for the PV/T collector, metal oxide nanoparticles (CuO, Al2O3, and SiO2) with different concentrations were dispersed in the base fluid (water). The results revealed that the CuO nanofluid showed the highest thermal conductivity and the best thermal stability compared to the other two nanofluids evaluated herein. Furthermore, the influence of CuO nanofluid in combination with air on the heat transfer enhancement is investigated under different flow regions such as laminar, transition, and turbulent. Using a CuO nanofluid plus air and water plus air the total equivalent efficiency was found to be 90.3% and 79.8%, respectively. It is worth noting that the proposed models could efficiently simulate both single and dual-fluid PV/T systems even under periods of fluctuating irradiance.

ACS Style

M. Imtiaz Hussain; Jin-Hee Kim; Jun-Tae Kim. Nanofluid-Powered Dual-Fluid Photovoltaic/Thermal (PV/T) System: Comparative Numerical Study. Energies 2019, 12, 775 .

AMA Style

M. Imtiaz Hussain, Jin-Hee Kim, Jun-Tae Kim. Nanofluid-Powered Dual-Fluid Photovoltaic/Thermal (PV/T) System: Comparative Numerical Study. Energies. 2019; 12 (5):775.

Chicago/Turabian Style

M. Imtiaz Hussain; Jin-Hee Kim; Jun-Tae Kim. 2019. "Nanofluid-Powered Dual-Fluid Photovoltaic/Thermal (PV/T) System: Comparative Numerical Study." Energies 12, no. 5: 775.

Journal article
Published: 01 October 2018 in Journal of Nanoelectronics and Optoelectronics
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In this study, the transient behavior of a concentrated photovoltaic thermal (CPV/T) system is assessed using one-dimensional mathematical model. The model is based on the heat balance of the concentrated photovoltaic (CPV) solar cells, receiver pipe, thermal fluid, insulation, and the storage tank attached to PV/T system via insulated pipes. The mathematical model was developed and solved using ordinary differential equation solvers in MATLAB® computer program. The interdependence thermo-electric dynamic responses of the CPV/T system were modeled and analyzed by considering two cases such as with and without glass enclosure around the receiver. The electrical and thermal efficiencies are evaluated as the function of enclosure effect, beam solar radiation, and circulating fluid flow rate. For the purpose of model validation, experimental measurements of the CPV/T system were performed. Satisfactory agreements were found between the experimental data and the predicted results. The developed dynamic model is most suitable to predict and evaluate the performance of a point-focused CPV/T system.

ACS Style

M. Imtiaz Hussain; Gwi Hyun Lee; Jun-Tae Kim. Simulation and Model Validation of a Multi-Concentration Points Concentrated Photovoltaic Thermal System. Journal of Nanoelectronics and Optoelectronics 2018, 13, 1552 -1556.

AMA Style

M. Imtiaz Hussain, Gwi Hyun Lee, Jun-Tae Kim. Simulation and Model Validation of a Multi-Concentration Points Concentrated Photovoltaic Thermal System. Journal of Nanoelectronics and Optoelectronics. 2018; 13 (10):1552-1556.

Chicago/Turabian Style

M. Imtiaz Hussain; Gwi Hyun Lee; Jun-Tae Kim. 2018. "Simulation and Model Validation of a Multi-Concentration Points Concentrated Photovoltaic Thermal System." Journal of Nanoelectronics and Optoelectronics 13, no. 10: 1552-1556.

Articles
Published: 02 September 2018 in International Journal of Green Energy
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In this study, the techno-economic impacts of nanofluids used as coolants to enhance the overall performance of a photovoltaic/thermal PV/T system, in comparison with conventional fluids, are discussed. A transient mathematical analysis was performed to evaluate the technical aspects and energy performance of the PV/T system. The proposed model is used to predict the annual thermal and electrical power outputs of a PV/T system based on CuO nanofluid, Al2O3 nanofluid, and conventional fluids. Economic and environmental analyses of the PV/T systems were performed by taking into account energy payback period, energy production factor, net CO2 mitigation, and net CO2 credit. Because of their greater energy unit area and levelized energy cost, nanofluid based PV/T systems have a lower payback period and better economic savings than those of conventional collectors. Using water, Al2O3 nanofluid, and CuO nanofluid, the net CO2 mitigation and net CO2 credit are 6.4 tons and 156.8 USD, 6.9 tons and 171.2 USD, and 7.4 tons and 181.6 USD, respectively, for 30 years life of the PV/T system. For typical industrial applications, PV/T systems with nanofluids should be considered as competitors to water-based PV/T collectors.

ACS Style

M. Imtiaz Hussain; Jun-Tae Kim. Conventional fluid- and nanofluid-based photovoltaic thermal (PV/T) systems: a techno-economic and environmental analysis. International Journal of Green Energy 2018, 15, 596 -604.

AMA Style

M. Imtiaz Hussain, Jun-Tae Kim. Conventional fluid- and nanofluid-based photovoltaic thermal (PV/T) systems: a techno-economic and environmental analysis. International Journal of Green Energy. 2018; 15 (11):596-604.

Chicago/Turabian Style

M. Imtiaz Hussain; Jun-Tae Kim. 2018. "Conventional fluid- and nanofluid-based photovoltaic thermal (PV/T) systems: a techno-economic and environmental analysis." International Journal of Green Energy 15, no. 11: 596-604.

Review
Published: 03 August 2018 in Solar Energy Materials and Solar Cells
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This study presents a critical review of the major research and development work that has advanced surface solar absorption technology and also discusses the applications of this technology in the last 15 years. In a surface solar absorption collector (SSAC), solar radiation is first absorbed on the surface of the collector and then transferred to the circulating fluid. This article reviews a wide range of studies on different SSAC systems with the aim of identifying research gaps to prepare this technology for commercial availability. Moreover, qualitative and quantitative research information on non-concentrating and concentrating SSACs was collected and evaluated in the context of a performance-based assessment, environmental issues, and sustainability concerns. The performance of these collectors mainly relies on the receiver design and thermal storage tanks with different heat transfer fluids. For high concentration collectors, there is an urgent need for new heat transfer and storage fluids to withstand elevated temperatures to minimize the flow instability. A review of the literature suggests that ongoing high quality research on this technology, especially on medium and high concentration collectors, will soon overcome the existing problems bringing this technology into temperature ranges that will make it commercially available. Finally, the scientific challenges and opportunities relevant to this technology are also discussed.

ACS Style

M. Imtiaz Hussain; Christophe Ménézo; Jun-Tae Kim. Advances in solar thermal harvesting technology based on surface solar absorption collectors: A review. Solar Energy Materials and Solar Cells 2018, 187, 123 -139.

AMA Style

M. Imtiaz Hussain, Christophe Ménézo, Jun-Tae Kim. Advances in solar thermal harvesting technology based on surface solar absorption collectors: A review. Solar Energy Materials and Solar Cells. 2018; 187 ():123-139.

Chicago/Turabian Style

M. Imtiaz Hussain; Christophe Ménézo; Jun-Tae Kim. 2018. "Advances in solar thermal harvesting technology based on surface solar absorption collectors: A review." Solar Energy Materials and Solar Cells 187, no. : 123-139.

Research article
Published: 03 June 2018 in International Journal of Photoenergy
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The focus of this paper is to predict the transient response of a nanoengineered photovoltaic thermal (PV/T) system in view of energy and exergy analyses. Instead of a circular-shaped receiver, a trapezoidal-shaped receiver is employed to increase heat transfer surface area with photovoltaic (PV) cells for improvement of heat extraction and thus achievement of a higher PV/T system efficiency. The dynamic mathematical model is developed using MATLAB® software by considering real-time heat transfer coefficients. The proposed model is validated with experimental data from a previous study. Negligible discrepancies were found between measured and predicted data. The validated model was further investigated in detail using different nanofluids by dispersing copper oxide (CuO) and aluminum oxide (Al2O3) in pure water. The overall performance of the nanoengineered PV/T system was compared to that of a PV/T system using water only, and optimal operating conditions were determined for maximum useful energy and exergy rates. The results indicated that the CuO/water nanofluid has a notable impact on the energy and exergy efficiencies of the PV/T system compared to that of Al2O3/water nanofluid and water only cases.

ACS Style

M. Imtiaz Hussain; Jun-Tae Kim. Performance Optimization of Unglazed Nanofluid Photovoltaic/Thermal System: Energy and Exergy Analyses. International Journal of Photoenergy 2018, 2018, 1 -11.

AMA Style

M. Imtiaz Hussain, Jun-Tae Kim. Performance Optimization of Unglazed Nanofluid Photovoltaic/Thermal System: Energy and Exergy Analyses. International Journal of Photoenergy. 2018; 2018 ():1-11.

Chicago/Turabian Style

M. Imtiaz Hussain; Jun-Tae Kim. 2018. "Performance Optimization of Unglazed Nanofluid Photovoltaic/Thermal System: Energy and Exergy Analyses." International Journal of Photoenergy 2018, no. : 1-11.

Journal article
Published: 01 November 2017 in Renewable Energy
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ACS Style

M. Imtiaz Hussain; Gwi Hyun Lee; Jun-Tae Kim. Experimental validation of mathematical models of identical aluminum and stainless steel engineered conical solar collectors. Renewable Energy 2017, 112, 44 -52.

AMA Style

M. Imtiaz Hussain, Gwi Hyun Lee, Jun-Tae Kim. Experimental validation of mathematical models of identical aluminum and stainless steel engineered conical solar collectors. Renewable Energy. 2017; 112 ():44-52.

Chicago/Turabian Style

M. Imtiaz Hussain; Gwi Hyun Lee; Jun-Tae Kim. 2017. "Experimental validation of mathematical models of identical aluminum and stainless steel engineered conical solar collectors." Renewable Energy 112, no. : 44-52.

Journal article
Published: 01 April 2017 in Renewable Energy
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The thermal performance of a novel concentric tube absorber for a conical solar collector (CSC) under forced convection was investigated by numerical and experimental analyses. In this system, the CSC assembly is mounted on dual axis tracking platform that can accurately track the sun position to get maximum concentrated solar radiation over the entire circumference of the absorber. Due to conical-shape reflector, the non-uniformity of the solar flux distribution along the absorber length is high; therefore, the non-uniform concentrated solar flux was applied to the absorber surface as boundary condition in Fluent software. To evaluate the heat transfer characteristics and performance of the system, heat loss and gain factors were derived from the novel concentric tube absorber while varying the flow rate. The concentric tube absorber of the CSC system was developed and analyzed with different operational parameters. The double-tube design provides the uniformly distributed flow and temperature symmetricity along the absorber length. The predicted results of the CSC system were in good agreement with the measured results.

ACS Style

M. Imtiaz Hussain; Gwi Hyun Lee. Numerical and experimental heat transfer analyses of a novel concentric tube absorber under non-uniform solar flux condition. Renewable Energy 2017, 103, 49 -57.

AMA Style

M. Imtiaz Hussain, Gwi Hyun Lee. Numerical and experimental heat transfer analyses of a novel concentric tube absorber under non-uniform solar flux condition. Renewable Energy. 2017; 103 ():49-57.

Chicago/Turabian Style

M. Imtiaz Hussain; Gwi Hyun Lee. 2017. "Numerical and experimental heat transfer analyses of a novel concentric tube absorber under non-uniform solar flux condition." Renewable Energy 103, no. : 49-57.

Journal article
Published: 02 November 2016 in Journal of Solar Energy Engineering
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Comparative performance assessment and model validation of the linear Fresnel concentrator (LFC) and the conical solar reflector (CSR) systems were performed under identical operating and climatic conditions. This paper analyzes the amount of heat loss by convective heat transfer (natural or forced) from the receiver to ambient air with and without a glass-reinforced plastic sheet enclosure around the collector assembly. The matlab ordinary differential equation (ode) solvers were used for simulation of the transient states. Mathematical models were generated from energy balance equations of the glass cover, absorber pipe, heat transfer fluid, and storage tank for each system. Thermal and optical analyses of the LFC (with and without an enclosure) and CSR systems were carried out by using the measured and calculated results. Satisfactory agreement was found between the experimental data and predicted results. The given models are suitable to simulate the dynamic energy flow across the different components of the LFC and CSR systems.

ACS Style

M. Imtiaz Hussain; Gwi Hyun Lee. Performance Comparison and Model Validation of a Conical Solar Reflector and a Linear Fresnel Concentrator. Journal of Solar Energy Engineering 2016, 138, 061014 .

AMA Style

M. Imtiaz Hussain, Gwi Hyun Lee. Performance Comparison and Model Validation of a Conical Solar Reflector and a Linear Fresnel Concentrator. Journal of Solar Energy Engineering. 2016; 138 (6):061014.

Chicago/Turabian Style

M. Imtiaz Hussain; Gwi Hyun Lee. 2016. "Performance Comparison and Model Validation of a Conical Solar Reflector and a Linear Fresnel Concentrator." Journal of Solar Energy Engineering 138, no. 6: 061014.

Journal article
Published: 01 October 2016 in Solar Energy
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The core concept of this study is to evaluate the energy potential and economic viability of concentrated photovoltaic thermal (CPVT) systems as a substitute for electricity, kerosene, and diesel for greenhouse heating. The performance of the CPVT system is tested and predicted by considering two cases (with and without a glass reinforced plastic enclosure). The transient behavior of the developed models was estimated using ordinary differential equation (ODE) solvers in MATLAB software. Furthermore, from the model validation point of view, the simulation results were compared with experimental data. The results revealed a satisfactory agreement between measured and calculated results. The CPVT with an enclosure was demonstrated to be more efficient than without an enclosure in terms of higher global efficiency and lower heat loss. By installing a CPVT system instead of buying electricity, kerosene and diesel for greenhouse heating, the life cycle savings (LCS) were 7344$, 8658$ and 11,405$, respectively, and the relevant discounted payback periods (DPP) were 21 years, 16 years and 11 years, respectively. The developed dynamic model is suitable for the optimization and performance prediction of CPVT systems.

ACS Style

M. Imtiaz Hussain; Asma Ali; Gwi Hyun Lee. Multi-module concentrated photovoltaic thermal system feasibility for greenhouse heating: Model validation and techno-economic analysis. Solar Energy 2016, 135, 719 -730.

AMA Style

M. Imtiaz Hussain, Asma Ali, Gwi Hyun Lee. Multi-module concentrated photovoltaic thermal system feasibility for greenhouse heating: Model validation and techno-economic analysis. Solar Energy. 2016; 135 ():719-730.

Chicago/Turabian Style

M. Imtiaz Hussain; Asma Ali; Gwi Hyun Lee. 2016. "Multi-module concentrated photovoltaic thermal system feasibility for greenhouse heating: Model validation and techno-economic analysis." Solar Energy 135, no. : 719-730.

Journal article
Published: 01 August 2016 in Solar Energy
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The purpose of this study was to analyze and compare the thermal performances of a line-focus and a point-focus solar concentrators (LFSC and PFSC, respectively) under similar operating and weather conditions in South Korea. Both concentrator systems had Fresnel lenses of the same surface area. To reduce heat loss, absorber pipes of the LFSC and PFSC systems were covered with borosilicate glass tube and foamed polyethylene insulation, respectively. Collector temperature (inlet and outlet temperature differential), collected energy, and thermal efficiency over experimental test time were calculated while the solar radiation, volumetric flow rate, and inlet temperature of the thermal fluid were varied. Good harmony was observed between the experimental and predicted results. Calibration of the both models reduced the deviation between the experimental and predicted temperature results compared to the uncalibrated models. Although both solar collectors showed similar trends in the variations of the average efficiency and total collected energy, these parameters were about 7% and 8% higher, respectively, in the PFSC compared to the LFSC. Overall, the results indicate that the PFSC performs slightly better than the LFSC in terms of the thermal efficiency, total collected energy, and heat loss.

ACS Style

M. Imtiaz Hussain; Gwi Hyun Lee. Thermal performance comparison of line- and point-focus solar concentrating systems: Experimental and numerical analyses. Solar Energy 2016, 133, 44 -54.

AMA Style

M. Imtiaz Hussain, Gwi Hyun Lee. Thermal performance comparison of line- and point-focus solar concentrating systems: Experimental and numerical analyses. Solar Energy. 2016; 133 ():44-54.

Chicago/Turabian Style

M. Imtiaz Hussain; Gwi Hyun Lee. 2016. "Thermal performance comparison of line- and point-focus solar concentrating systems: Experimental and numerical analyses." Solar Energy 133, no. : 44-54.

Journal article
Published: 01 October 2015 in Energy
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ACS Style

M. Imtiaz Hussain; Asma Ali; Gwi Hyun Lee. Performance and economic analyses of linear and spot Fresnel lens solar collectors used for greenhouse heating in South Korea. Energy 2015, 90, 1522 -1531.

AMA Style

M. Imtiaz Hussain, Asma Ali, Gwi Hyun Lee. Performance and economic analyses of linear and spot Fresnel lens solar collectors used for greenhouse heating in South Korea. Energy. 2015; 90 ():1522-1531.

Chicago/Turabian Style

M. Imtiaz Hussain; Asma Ali; Gwi Hyun Lee. 2015. "Performance and economic analyses of linear and spot Fresnel lens solar collectors used for greenhouse heating in South Korea." Energy 90, no. : 1522-1531.

Review
Published: 01 September 2015 in Journal of Biosystems Engineering
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ACS Style

M. Imtiaz Hussain; Gwi Hyun Lee. Utilization of Solar Energy in Agricultural Machinery Engineering: A Review. Journal of Biosystems Engineering 2015, 40, 186 -192.

AMA Style

M. Imtiaz Hussain, Gwi Hyun Lee. Utilization of Solar Energy in Agricultural Machinery Engineering: A Review. Journal of Biosystems Engineering. 2015; 40 (3):186-192.

Chicago/Turabian Style

M. Imtiaz Hussain; Gwi Hyun Lee. 2015. "Utilization of Solar Energy in Agricultural Machinery Engineering: A Review." Journal of Biosystems Engineering 40, no. 3: 186-192.

Journal article
Published: 01 April 2015 in Renewable Energy
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ACS Style

M. Imtiaz Hussain; Gwi Hyun Lee. Experimental and numerical studies of a U-shaped solar energy collector to track the maximum CPV/T system output by varying the flow rate. Renewable Energy 2015, 76, 735 -742.

AMA Style

M. Imtiaz Hussain, Gwi Hyun Lee. Experimental and numerical studies of a U-shaped solar energy collector to track the maximum CPV/T system output by varying the flow rate. Renewable Energy. 2015; 76 ():735-742.

Chicago/Turabian Style

M. Imtiaz Hussain; Gwi Hyun Lee. 2015. "Experimental and numerical studies of a U-shaped solar energy collector to track the maximum CPV/T system output by varying the flow rate." Renewable Energy 76, no. : 735-742.

Journal article
Published: 01 March 2015 in Energy Conversion and Management
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ACS Style

M. Imtiaz Hussain; Gwi Hyun Lee. Parametric performance analysis of a concentrated photovoltaic co-generation system equipped with a thermal storage tank. Energy Conversion and Management 2015, 92, 215 -222.

AMA Style

M. Imtiaz Hussain, Gwi Hyun Lee. Parametric performance analysis of a concentrated photovoltaic co-generation system equipped with a thermal storage tank. Energy Conversion and Management. 2015; 92 ():215-222.

Chicago/Turabian Style

M. Imtiaz Hussain; Gwi Hyun Lee. 2015. "Parametric performance analysis of a concentrated photovoltaic co-generation system equipped with a thermal storage tank." Energy Conversion and Management 92, no. : 215-222.