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Ahmad Fazlizan
Solar Energy Research Institute, National University of Malaysia, 43600, Bangi, Malaysia

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Short Biography

Dr. Ahmad Fazlizan Abdullah is a Research Fellow at the Solar Energy Research Institute (SERI), Universiti Kebangsaan Malaysia (UKM). He obtained his B.Eng. in Mechanical Engineering from Universiti Teknologi Malaysia (UTM) in 2006, M.Eng. from University of Malaya (UM) in 2012 and Ph.D. in Renewable Energy also from UM in 2016. Before dedicating himself to research and academia, he spent about 5 years in the industries. His research interest is in Renewable Energy especially Wind Energy and Green Technology. He has published a significant number of technical papers in the high-ranked journals mainly in renewable energy research. Together with the research team, he has received several awards at national and international level namely Malaysia Technology Expo, International Invention & Innovation Exhibition, International Conference and Exposition on Inventions by Institutions of Higher Learning, International Trade Fair (Germany) and Seoul International Invention Fair (Korea). He was also the recipient the Certificate of Merit: Energy Order of Merit in the World Invention Award Festival 2013, Korea.

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Short communication
Published: 21 July 2021 in Case Studies in Thermal Engineering
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Solar adsorption air conditioning system (SADCS) is an excellent alternative to the conventional vapour compression system (VCS). SADCS has advantages over VCS system notably that it is a green cooling technology that utilizes solar energy to drive the adsorption/desorption cycle, using pure water as a green HFC-free refrigerant, mechanically simple and can be operated without moving parts other than the magnetic valves. In the last decade, several developments and innovations have been achieved in the field of SADCS research. However, further research is needed to bring this technology to practical level. Hence, this paper first discusses the literature survey that adds insights into the research of SADCS technologies with emphasis placed on the practical research that has been conducted at lab-scale and commercial level. Then, the potential of SADCS for cooling applications of an office building in tropical climate is discussed using simulation in TRNSYS. From the simulation we found that the solar fraction of the SADCS system is as high as 63 %, with the temperature and the relative humidity of an office space can reach an average of 20 °C and 60 % respectively, which are within the range of the thermal comfort level for the occupants.

ACS Style

Norhayati Mat Wajid; Abdul Murad Zainal Abidin; Mirhamed Hakemzadeh; Hasila Jarimi; Ahmad Fazlizan; Mohd Faizal Fauzan; Adnan Ibrahim; Ali H.A. Al-Waeli; Kamaruzzaman Sopian. Solar adsorption air conditioning system – Recent advances and its potential for cooling an office building in tropical climate. Case Studies in Thermal Engineering 2021, 27, 101275 .

AMA Style

Norhayati Mat Wajid, Abdul Murad Zainal Abidin, Mirhamed Hakemzadeh, Hasila Jarimi, Ahmad Fazlizan, Mohd Faizal Fauzan, Adnan Ibrahim, Ali H.A. Al-Waeli, Kamaruzzaman Sopian. Solar adsorption air conditioning system – Recent advances and its potential for cooling an office building in tropical climate. Case Studies in Thermal Engineering. 2021; 27 ():101275.

Chicago/Turabian Style

Norhayati Mat Wajid; Abdul Murad Zainal Abidin; Mirhamed Hakemzadeh; Hasila Jarimi; Ahmad Fazlizan; Mohd Faizal Fauzan; Adnan Ibrahim; Ali H.A. Al-Waeli; Kamaruzzaman Sopian. 2021. "Solar adsorption air conditioning system – Recent advances and its potential for cooling an office building in tropical climate." Case Studies in Thermal Engineering 27, no. : 101275.

Journal article
Published: 20 May 2021 in Sustainability
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An ongoing project to implement a mini standalone solar photovoltaic (PV) generation system of 2.5 kWp capacity at the eco-tourism centre of Liogu Ku Silou-Silou (EPLISSI), Sabah, was initiated in 2019. Since the solar panel support (ground mounting) used in this project will be erected separately, the main goals of this study are to estimate the optimum tilt angle, βopt, and orientation for the solar PV modules. To achieve these goals, the Liu and Jordan isotropic diffuse radiation model was used (1960). Another three isotropic diffuse sky radiation models (Koronakis model, Badescu model, and Tian model) were applied to estimate the optimum tilt angle with the orientation kept facing due south. For verification purposes, the PV power output data obtained from an online PV simulator known as Global Solar Atlas or GSA 2.3 was used and compared to the results of the four isotropic models. The results suggest that the Tian model is more suitable for approximating insolation, as it was proven to have the lowest difference among all models and is in close agreement with the result of the optimum tilt angle provided by GSA 2.3. However, the outcomes demonstrated from the isotropic models propose an error up to 30% (in the range of 31% to 32%) as compared to GSA 2.3.

ACS Style

Maryon Matius; Mohd Ismail; Yan Farm; Adriana Amaludin; Mohd Radzali; Ahmad Fazlizan; Wan Muzammil. On the Optimal Tilt Angle and Orientation of an On-Site Solar Photovoltaic Energy Generation System for Sabah’s Rural Electrification. Sustainability 2021, 13, 5730 .

AMA Style

Maryon Matius, Mohd Ismail, Yan Farm, Adriana Amaludin, Mohd Radzali, Ahmad Fazlizan, Wan Muzammil. On the Optimal Tilt Angle and Orientation of an On-Site Solar Photovoltaic Energy Generation System for Sabah’s Rural Electrification. Sustainability. 2021; 13 (10):5730.

Chicago/Turabian Style

Maryon Matius; Mohd Ismail; Yan Farm; Adriana Amaludin; Mohd Radzali; Ahmad Fazlizan; Wan Muzammil. 2021. "On the Optimal Tilt Angle and Orientation of an On-Site Solar Photovoltaic Energy Generation System for Sabah’s Rural Electrification." Sustainability 13, no. 10: 5730.

Short communication
Published: 22 March 2021 in Case Studies in Thermal Engineering
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This paper presents an experimental study comprising two CMA solar collectors with parallel and series arrangements on a forced convection solar drying system. The parallel and series solar collectors were investigated to evaluate the arrangement type's effect on the thermal performance. The experiments were conducted using artificial solar radiation that varies from 300 to 900W/m2 with the air velocity of 0.5–2 m/s. The arrangement's efficiency was evaluated based on the drying chamber's thermal delivery from the collectors, thermal gains, and drying efficiencies, including air velocity effect and pressure drop. Results show that the solar collectors' parallel arrangement leads to higher air temperature inside the drying chamber than the series by 3.87 °C. The thermal efficiency of 33.89% is achieved for the parallel setup than the series of 27.73%. The series arrangement is superior to the parallel in terms of the pressure drop across the solar drying system. Drying efficiency is observed at a higher air velocity of 2 m/s for both arrangements than lower airflow of 0.5 and 1 m/s. Parallel configuration showed promising performance in drying efficiency and low energy usage compared to the series arrangement in which the negative impact of higher pressure-drop was compensated.

ACS Style

M.A.S.M. Tarminzi; A.A. Razak; M.A.A. Azmi; A. Fazlizan; Z.A.A. Majid; K. Sopian. Comparative study on thermal performance of cross-matrix absorber solar collector with series and parallel configurations. Case Studies in Thermal Engineering 2021, 25, 100935 .

AMA Style

M.A.S.M. Tarminzi, A.A. Razak, M.A.A. Azmi, A. Fazlizan, Z.A.A. Majid, K. Sopian. Comparative study on thermal performance of cross-matrix absorber solar collector with series and parallel configurations. Case Studies in Thermal Engineering. 2021; 25 ():100935.

Chicago/Turabian Style

M.A.S.M. Tarminzi; A.A. Razak; M.A.A. Azmi; A. Fazlizan; Z.A.A. Majid; K. Sopian. 2021. "Comparative study on thermal performance of cross-matrix absorber solar collector with series and parallel configurations." Case Studies in Thermal Engineering 25, no. : 100935.

Review
Published: 15 January 2021 in Energies
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The tropical climate with its high average temperatures throughout the year affects the thermal comfort of buildings, especially for naturally ventilated spaces. The government’s move to turn hospitals into green buildings is seen in line with the global commitment to conserve the environment and the country’s current policy of supporting sustainable development. To achieve this goal, energy efficiency and thermal comfort need to be given priority in the focus on hospital planning and implementation for a better quality of the indoor environment. This literature review has led to the need to improve thermal comfort in natural ventilated wards in government hospitals. Some wards are built without air conditioning to save on construction costs, reduce utility costs through low energy consumption, as well as the need for infection control and airborne infections. However, current climate change requires a special study of thermal comfort in wards that use natural ventilation. An innovative solution is proposed to solve the problem statement identified in the reviewed literature through the application of solar PV/T systems and heat pumps. This hybrid system re-uses the heat energy (cogeneration) generated from solar PV panels to be cooled by heat pumps and is then pumped into the ward for cooling purposes. The proposed system has the potential to improve thermal comfort in natural ventilation wards and increase efficiency of the solar PV system for optimal electricity generation as well as improve the overall energy performance of buildings through low-energy cooling systems. It is not only solving the thermal comfort issue but also avoid the use of extra energy for cooling by optimizing the renewable energy.

ACS Style

Noor Muhammad Abd Rahman; Lim Chin Haw; Ahmad Fazlizan. A Literature Review of Naturally Ventilated Public Hospital Wards in Tropical Climate Countries for Thermal Comfort and Energy Saving Improvements. Energies 2021, 14, 435 .

AMA Style

Noor Muhammad Abd Rahman, Lim Chin Haw, Ahmad Fazlizan. A Literature Review of Naturally Ventilated Public Hospital Wards in Tropical Climate Countries for Thermal Comfort and Energy Saving Improvements. Energies. 2021; 14 (2):435.

Chicago/Turabian Style

Noor Muhammad Abd Rahman; Lim Chin Haw; Ahmad Fazlizan. 2021. "A Literature Review of Naturally Ventilated Public Hospital Wards in Tropical Climate Countries for Thermal Comfort and Energy Saving Improvements." Energies 14, no. 2: 435.

Review
Published: 01 January 2021 in Journal of Renewable Materials
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ACS Style

R. A. Rahman; A. Fazlizan; N. Asim; A. Thongtha. A Review on the Utilization ofWaste Material for Autoclaved Aerated Concrete Production†. Journal of Renewable Materials 2021, 9, 61 -72.

AMA Style

R. A. Rahman, A. Fazlizan, N. Asim, A. Thongtha. A Review on the Utilization ofWaste Material for Autoclaved Aerated Concrete Production†. Journal of Renewable Materials. 2021; 9 (1):61-72.

Chicago/Turabian Style

R. A. Rahman; A. Fazlizan; N. Asim; A. Thongtha. 2021. "A Review on the Utilization ofWaste Material for Autoclaved Aerated Concrete Production†." Journal of Renewable Materials 9, no. 1: 61-72.

Short communication
Published: 03 December 2020 in Case Studies in Thermal Engineering
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This study aims to experimentally investigate the passive cooling performance of a concentrated PV module, using two different designs of novel passive fin heat sinks namely, lapping and longitudinal. Design of Experiment (DOE) approach technique was employed to identify the optimum design parameters in terms of fin height, fin pitch, fin thickness, number of fins and tilt angle. The experimental work was carried out under real environmental conditions at optimum design parameters of the passive fin heat sinks. At average solar irradiance of 1000 W/m2 and ambient temperature of 33 °C, results showed that, passive cooling with lapping fins demonstrate the best performance with mean PV module temperature 24.6 °C lower than the reference PV module, and hence, the achieved electrical efficiency and power output are as high as 10.68% and 37.1 W, respectively. Finally, Life Cycle Cost Analysis (LCCA) was conducted. The analysis showed that the payback period for PV module with longitudinal, lapping fins and bare PV module are 4.2, 5 and 8.4 years respectively. Therefore, PV module cooling using passive technique particularly with lapping fins design is concluded as the preferred option.

ACS Style

A.M. Elbreki; A.F. Muftah; K. Sopian; H. Jarimi; A. Fazlizan; A. Ibrahim. Experimental and economic analysis of passive cooling PV module using fins and planar reflector. Case Studies in Thermal Engineering 2020, 23, 100801 .

AMA Style

A.M. Elbreki, A.F. Muftah, K. Sopian, H. Jarimi, A. Fazlizan, A. Ibrahim. Experimental and economic analysis of passive cooling PV module using fins and planar reflector. Case Studies in Thermal Engineering. 2020; 23 ():100801.

Chicago/Turabian Style

A.M. Elbreki; A.F. Muftah; K. Sopian; H. Jarimi; A. Fazlizan; A. Ibrahim. 2020. "Experimental and economic analysis of passive cooling PV module using fins and planar reflector." Case Studies in Thermal Engineering 23, no. : 100801.

Conference paper
Published: 07 April 2020 in IOP Conference Series: Earth and Environmental Science
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Autoclaved aerated concrete (AAC) has become more attractive in construction due to its excellent environmentally friendly in building construction. Due to its increasing applications, the AAC wastes become abundance in construction site. Apparently, recycling the concrete waste powder to a wall concrete, particularly an autoclaved aerated concrete (AAC) was not frequently practiced in construction and moreover no study has been carried out yet. AAC is relatively lightweight, having lower thermal conductivity, higher heat resistance, lower shrinkage, and faster in construction process compared to normal concrete. AAC concrete is a combination of silica sand, cement, lime, water and an expansion agent. To improve its physical and mechanical properties and to reduce its production cost, tremendous innovation which used waste materials as partial replacement of AAC materials have been done. From these innovations, the use of recycled AAC as a partial replacement for wall concrete has not been carried out yet. This paper is intended to classify the literatures on the innovations that have been done on replacement in AAC materials to enhance its physical and mechanical properties and thermal performance. The physical properties in terms of its microstructure and the mechanical properties such as density, compressive strength, water absorption are presented to classify the investigation that has been done in such innovations. Apart of that, the discussion on innovations to improve its thermal performance also presented. To conclude, up to now, there is no attempt on using the recycled AAC waste powder as a partial replacement in AAC as a wall concrete is reported.

ACS Style

R.A. Rahman; A. Fazlizan; N. Asim; A. Thongtha. Utilization of waste material for aerated autoclaved concrete production: A preliminary review. IOP Conference Series: Earth and Environmental Science 2020, 463, 1 .

AMA Style

R.A. Rahman, A. Fazlizan, N. Asim, A. Thongtha. Utilization of waste material for aerated autoclaved concrete production: A preliminary review. IOP Conference Series: Earth and Environmental Science. 2020; 463 ():1.

Chicago/Turabian Style

R.A. Rahman; A. Fazlizan; N. Asim; A. Thongtha. 2020. "Utilization of waste material for aerated autoclaved concrete production: A preliminary review." IOP Conference Series: Earth and Environmental Science 463, no. : 1.

Journal article
Published: 01 February 2019 in Renewable Energy
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Wind turbines in the context of integration in an urban environment are considered as one of the most promising technologies for the efficient diffusion of renewable energy sources. However, situations such as low wind velocity, highly turbulent and skewed wind flow conditions are commonly encountered in this environment. This misaligned flow could affect the horizontal axis wind turbine performance. The vertical axis wind turbine (VAWT) is more suitable to operate under these unfavorable conditions. Nevertheless, the conventional VAWT has low efficiency and poor self-starting characteristics. Therefore, a novel design of deflector integrated cross axis wind turbine (CAWT) is proposed. Tests were carried out to harness wind energy from both the horizontal and vertical components of the skewed flow induced by the deflectors. A semi-empirical approach was also developed to analyze the performance of the CAWT. The aerodynamic behavior of the CAWT was determined by combining the blade element momentum (BEM) model and double multiple streamtube theory (DMST). The approach showed notable agreement between the experimental and theoretical results (9.8% to 14.2% difference). In conclusion, the findings from the experiment and the model showed that the concept has very good potential in the renewable energy industry.

ACS Style

Wen-Tong Chong; Wan Khairul Muzammil; Hwai-Chyuan Ong; Kamaruzzaman Sopian; Mohammed Gwani; Ahmad Fazlizan; Sin-Chew Poh. Performance analysis of the deflector integrated cross axis wind turbine. Renewable Energy 2019, 138, 675 -690.

AMA Style

Wen-Tong Chong, Wan Khairul Muzammil, Hwai-Chyuan Ong, Kamaruzzaman Sopian, Mohammed Gwani, Ahmad Fazlizan, Sin-Chew Poh. Performance analysis of the deflector integrated cross axis wind turbine. Renewable Energy. 2019; 138 ():675-690.

Chicago/Turabian Style

Wen-Tong Chong; Wan Khairul Muzammil; Hwai-Chyuan Ong; Kamaruzzaman Sopian; Mohammed Gwani; Ahmad Fazlizan; Sin-Chew Poh. 2019. "Performance analysis of the deflector integrated cross axis wind turbine." Renewable Energy 138, no. : 675-690.

Regular paper
Published: 07 October 2017 in International Journal of Precision Engineering and Manufacturing-Green Technology
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The novel exhaust air energy recovery turbine generator is designed to recover part of energy from a fan-powered exhaust air system which represented by a cooling tower. The discharge wind from the cooling tower varies throughout the radius makes it a non-uniform profile. A vertical axis wind turbine (VAWT) is placed at the outlet of a cooling tower to recover the energy. The VAWT behavior in the non-uniform wind stream from the exhaust air system is studied by experiment and double multiple stream tube (DMST) theory. A novel application of the DMST model is applied for non-uniform wind stream. The experimental results show that best horizontal position of the VAWT is at a distance of about 2/3 of the outlet radius with respect to turbine rotation. Theoretical analysis explains the wind turbine behavior in the non-uniform wind stream as acquired from the experiment. For the selected wind turbine, it is the best to match the highest wind velocity region to the wind turbine at the range of 45° to 115° azimuth angle. This innovative system has a huge potential due to wide application of exhaust air system globally.

ACS Style

Ahmad Fazlizan; Wen Tong Chong; Sook Yee Yip; Sin Chew Poh; Wan Khairul Muzammil. Double multiple stream tube analysis of non-uniform wind stream of exhaust air energy recovery turbine generator. International Journal of Precision Engineering and Manufacturing-Green Technology 2017, 4, 401 -407.

AMA Style

Ahmad Fazlizan, Wen Tong Chong, Sook Yee Yip, Sin Chew Poh, Wan Khairul Muzammil. Double multiple stream tube analysis of non-uniform wind stream of exhaust air energy recovery turbine generator. International Journal of Precision Engineering and Manufacturing-Green Technology. 2017; 4 (4):401-407.

Chicago/Turabian Style

Ahmad Fazlizan; Wen Tong Chong; Sook Yee Yip; Sin Chew Poh; Wan Khairul Muzammil. 2017. "Double multiple stream tube analysis of non-uniform wind stream of exhaust air energy recovery turbine generator." International Journal of Precision Engineering and Manufacturing-Green Technology 4, no. 4: 401-407.

Journal article
Published: 06 May 2016 in Energies
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Recovering energy from exhaust air systems of building cooling towers is an innovative idea. A specific wind turbine generator was designed in order to achieve this goal. This device consists of two Giromill vertical axis wind turbines (VAWT) combined with four guide vanes and two diffuser plates. It was clear from previous literatures that no comprehensive flow behavior study had been carried out on this innovative device. Therefore, the working principle of this design was simulated using the Analysis System (ANSYS) Fluent computational fluid dynamics (CFD) package and the results were compared to experimental ones. It was perceived from the results that by introducing the diffusers and then the guide vanes, the overall power output of the wind turbine was improved by approximately 5% and 34%, respectively, compared to using VAWT alone. In the case of the diffusers, the optimum angle was found to be 7°, while for guide vanes A and B, it was 70° and 60° respectively. These results were in good agreement with experimental results obtained in the previous experimental study. Overall, it can be concluded that exhaust air recovery turbines are a promising form of green technology.

ACS Style

Seyedsaeed Tabatabaeikia; Nik-Nazri Nik-Ghazali; Wen Tong Chong; Behzad Shahizare; Ahmad Fazlizan; Alireza Esmaeilzadeh; Nima Izadyar. A Comparative Computational Fluid Dynamics Study on an Innovative Exhaust Air Energy Recovery Wind Turbine Generator. Energies 2016, 9, 346 .

AMA Style

Seyedsaeed Tabatabaeikia, Nik-Nazri Nik-Ghazali, Wen Tong Chong, Behzad Shahizare, Ahmad Fazlizan, Alireza Esmaeilzadeh, Nima Izadyar. A Comparative Computational Fluid Dynamics Study on an Innovative Exhaust Air Energy Recovery Wind Turbine Generator. Energies. 2016; 9 (5):346.

Chicago/Turabian Style

Seyedsaeed Tabatabaeikia; Nik-Nazri Nik-Ghazali; Wen Tong Chong; Behzad Shahizare; Ahmad Fazlizan; Alireza Esmaeilzadeh; Nima Izadyar. 2016. "A Comparative Computational Fluid Dynamics Study on an Innovative Exhaust Air Energy Recovery Wind Turbine Generator." Energies 9, no. 5: 346.

Journal article
Published: 01 January 2014 in Energy Procedia
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Recently, there are small wind turbine developments which are suitable for urban and suburban application. However, the efficiency of the wind turbine is the main concern for all researchers due to the uncertainty of wind speed and wind direction in urban area. In this paper, a new power augmented shroud integrated with vertical axis wind turbine (VAWT) is introduced. This power augmented shroud is able to improve the performance of the VAWT significantly by increasing the wind speed. It also channels the flow to better angle of attack for the VAWT and reduces the negative torque of the wind turbine. Hence, it improves the self-starting behaviour of the VAWT, and increases the coefficient of power. The numerical method is used to simulate the wind flow for the power augmented shroud with a single bladed NACA 0015 airfoil VAWT by commercial computational fluid dynamic (CFD) software, ANSYS FLUENT 14.0. In this 2D simulation, the shear stress transport (SST) k-ω turbulence model with the sliding mesh method was used with the tip speed ratio of 5.1 for the wind turbine. The result was verified by re-simulating the experiment published by the Sandia National Laboratories. The simulation result shows that the new design of power augmented shroud is able to increase the coefficient of power significant for the VAWT which is about 147.1% compared to the bare VAWT. Therefore, for urban area application, this power augmented shroud can improve the low efficiency problem for the VAWT.

ACS Style

K.H. Wong; W.T. Chong; H.T. Yap; A. Fazlizan; W.Z.W. Omar; S.C. Poh; F.B. Hsiao. The Design and Flow Simulation of a Power-augmented Shroud for Urban Wind Turbine System. Energy Procedia 2014, 61, 1275 -1278.

AMA Style

K.H. Wong, W.T. Chong, H.T. Yap, A. Fazlizan, W.Z.W. Omar, S.C. Poh, F.B. Hsiao. The Design and Flow Simulation of a Power-augmented Shroud for Urban Wind Turbine System. Energy Procedia. 2014; 61 ():1275-1278.

Chicago/Turabian Style

K.H. Wong; W.T. Chong; H.T. Yap; A. Fazlizan; W.Z.W. Omar; S.C. Poh; F.B. Hsiao. 2014. "The Design and Flow Simulation of a Power-augmented Shroud for Urban Wind Turbine System." Energy Procedia 61, no. : 1275-1278.