Article
Energy & Fuels
Ahssan M. A. Alshibil, Istvan Farkas, Piroska Vig
Summary: This study designed and fabricated a novel configuration of a copper absorber plate connected to a photovoltaic module to reduce overheating. The addition of louver-shaped fins and a serpentine tube created a bi-fluid-based photovoltaic thermal module, increasing heat transfer rate from the PV surface to air and water. Experimental results showed a linear relationship between electrical efficiency and decreased cell temperature, thanks to the fins and tube. Compared to standard and air-cooled units, the bi-fluid module demonstrated lower cell temperature and higher electrical and thermal efficiency values. The use of Louver-shaped fins and tubes allows the fluid in the system to gain the most heat, making it highly efficient at utilizing electricity.
Article
Construction & Building Technology
Juwel C. Mojumder, Saiied M. Aminossadati, Christopher R. Leonardi
Summary: A hybrid numerical modelling approach was developed to investigate the performance of a spectrally-filtered concentrated photovoltaic thermal (SF-CPV/T) collector under local climate conditions. The model accurately predicts the thermal distribution and electrical output of the collector, and helps determine the best installation region.
ENERGY AND BUILDINGS
(2022)
Article
Green & Sustainable Science & Technology
Chaoqun Shen, Feifan Liu, Sheng Qiu, Xiangdong Liu, Feng Yao, Yan Zhang
Summary: Theoretical model of heat transfer in PV/T collector with different parallel cooling channels was established to evaluate the impact of parallel cooling channels. Results showed that with 10 subchannels, pressure drop was lowest, and I-type configuration of inlet and outlet was the best choice. Increasing diameter ratio improved temperature distribution and cooling channels with D/d = 4 had a 50% larger figure of merit than D/d = 2.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Green & Sustainable Science & Technology
Mohammed G. Ajel, Engin Gedik, Hasanain Abdul A. Wahhab, Basam A. Shallal
Summary: Photovoltaic panels convert solar energy into electricity by using semiconductor materials and absorbing heat from solar radiation, but the efficiency of electricity generation is affected by the panel's temperature. Thus, cooling photovoltaic panels has become a focus of research, with cost reduction and energy consumption being important considerations. This study used two models of open-flow flat collectors to analyze the performance of PV panels and improve the cooling process. The results showed that the collector design had an impact on the PV/T system performance and panel temperature, with an increase in panel performance observed with both models.
Article
Energy & Fuels
Mohamed R. Gomaa, Mohsen Ahmed, Hegazy Rezk
Summary: Designing a Photovoltaic/Thermal (PV/T) system under high performance involves considering thermal, economic, and reliability challenges. PV/T systems are more effective in locations with high irradiance compared to standard PV systems. An optimal cooling system is necessary to eliminate excess heat from a PV/T system and improve the temperature of PV modules, which directly affects overall performance. This study focuses on a new, economically viable, and simplified cooling box for PV/T systems, analyzing the effects of irradiance levels and cooling water flow rates on cell temperature and output cooling water temperature. The study utilized finite element-based software (ANSYS 19.2) to numerically solve the problem in a three-dimensional model. The results showed that increasing the cooling fluid flow rate reduces the average surface temperature distribution and outlet cooling water temperature for both thin and thick box heat exchangers, with an ideal flow rate of 3 L/min. The average surface temperature and water-cooling temperature for the thin box heat exchanger were 30.7°C and 38.9°C, respectively, while for the thick box heat exchanger, they were 30.8°C and 32.4°C, respectively, under solar irradiance of 1000 W/m(2) and optimal flow rate.
Article
Thermodynamics
Shiqian Dong, He Long, Jingxuan Guan, Lina Jiang, Chaoqun Zhuang, Yafeng Gao, Yanqiang Di
Summary: This research proposes a novel PV/T system and evaluates its effectiveness and stability through parameter discussions and performance analysis. The results show that the system can significantly reduce cell temperature, improve electrical output and thermal efficiency. Furthermore, using a variable water flow rate strategy can further enhance energy collection and reduce pump energy consumption.
Article
Energy & Fuels
Ridha Chargui, Bourhan Tashtoush, Sami Awani
Summary: This study presents an experimental evaluation of a new design of a parabolic trough solar collector, which achieved significant improvements in maximizing energy yield and system thermal efficiency compared to other designs. An economic study indicated a gross payback period of 3.3 years, demonstrating promising economic feasibility.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Y. Chaibi, T. El Rhafiki, R. Simon-Allue, I Guedea, Cardamas Luaces, O. Charro Gajate, T. Kousksou, Y. Zeraouli
Summary: Solar photovoltaic thermal (PV/T) systems have the potential to play a key role in the world's energy transition, and the design of such systems requires the development of physical models to predict their thermal and electrical performances. This paper presents various models and equivalent-circuit configurations for designing PV/T systems, including a Quasi-Steady Thermal Model (QSTM) for forecasting thermal performances. The efficiency analysis reveals the importance of choosing the right equivalent-circuit model and highlights limitations of certain electrical models.
Article
Thermodynamics
Mohamed Lebbi, Khaled Touafek, Ahmed Benchatti, Lyes Boutina, Abdelkrim Khelifa, Mohamed Taher Baissi, Samir Hassani
Summary: The study aimed to address the issues of temperature rise and dust accumulation on solar panels in desert areas, by utilizing a new hybrid system PV/T Bi-fluid to achieve both cooling and self-cleaning simultaneously. Experimental results demonstrated the effectiveness of this system in improving electrical performance.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Zhonghua Zhao, Li Zhu, Yiping Wang, Qunwu Huang, Yong Sun
Summary: By studying the electrical and thermal performance of different numbers of fins in solar PV/T systems, it was found that selecting the right number of fins is crucial for improving the system's overall efficiency. This research will assist in optimizing the design of PV/T systems and provide valuable information for the application of PV/T systems in building integration.
Article
Thermodynamics
Yashun Lu, Guiqiang Li
Summary: Hybrid photovoltaic/thermal (PV/T) modules are proposed to generate more electricity and heat, improving the conversion efficiency of solar energy per unit area. However, the efficiency of the photovoltaic (PV) cells in PV/T modules decreases with increasing cell temperature, significantly impacting the overall conversion efficiency. This study suggests four temperature profiles (uniform, single-Gaussian, double-Gaussian, multi-Gaussian) on the PV cell surface by adjusting the heat transfer arrangement in the PV/T module. It is found that different temperature profiles have varying effects on the electrical performance of PV cells, with a nonuniform temperature profile showing potential for improvement.
Review
Energy & Fuels
Kemal Bilen, Ismail Erdogan
Summary: The sun is the most important energy source for the world and solar energy can be converted to electricity using PV/T solar panels. The efficiency of PV/T solar panels is low due to temperature increase, which can be improved by cooling techniques. This comprehensive review study analyzes cooling techniques used in previous studies and presents the decrease in temperature and enhancement in electrical efficiency.
Article
Green & Sustainable Science & Technology
Houssam Chouikhi, Baher M. A. Amer
Summary: This paper presents a solar dryer with an indirect-mode forced convection and a PV/T air collector. The PV/T air collector produces heated air and electrical energy to facilitate convection drying in the solar dryer. Experimental and numerical simulations were conducted to analyze the performance of the dryer. The experimental results were validated by the CFD modeling, showing good agreement. The daily average efficiencies of the collector, dryer, and PV panel were estimated to be 30.9%, 15.2%, and 8.7% respectively for the solar drying system.
Article
Green & Sustainable Science & Technology
Mingke Hu, Chao Guo, Bin Zhao, Xianze Ao, Suhendri, Jingyu Cao, Qiliang Wang, Saffa Riffat, Yuehong Su, Gang Pei
Summary: The evacuated flat-plate photovoltaic/thermal (E-PV/T) collector proposed in this study utilizes vacuum insulation to increase thermal efficiency, potentially delivering electricity and heat at high temperatures. Key parameters, such as initial water temperature, vacuum degree, emissivity, and temperature coefficient, were investigated to optimize system performance. Lowering emissivity and increasing temperature coefficient resulted in significant efficiency improvements. This research provides insights for optimizing flat-plate PV/T collectors for high-temperature applications.
Article
Energy & Fuels
Sebastian Pater
Summary: This study analyzes the operation of four model installations with PV-T and other devices using a transient systems simulation program, focusing on the long-term performance of PV-T under selected climatic conditions. The results show that the temperature coefficient of photovoltaic cells and the use of a heat pump have significant impacts on improving the efficiency of PV-T operation.
Article
Thermodynamics
Katherine D'Avignon, Michael Kummert
APPLIED THERMAL ENGINEERING
(2016)
Article
Thermodynamics
Benjamin Henault, Philippe Pasquier, Michael Kummert
APPLIED THERMAL ENGINEERING
(2016)
Article
Thermodynamics
Benoit Delcroix, Michael Kummert, Ahmed Daoud
SCIENCE AND TECHNOLOGY FOR THE BUILT ENVIRONMENT
(2017)
Article
Thermodynamics
Katherine D'Avignon, Michael Kummert
SCIENCE AND TECHNOLOGY FOR THE BUILT ENVIRONMENT
(2018)
Article
Construction & Building Technology
Amelie Robert, Michael Kummert
BUILDING AND ENVIRONMENT
(2012)
Article
Construction & Building Technology
G. B. Murphy, M. Kummert, B. R. Anderson, J. Counsell
JOURNAL OF BUILDING PERFORMANCE SIMULATION
(2011)
Article
Construction & Building Technology
Stephane Bertagnolio, Michel Bernier, Michael Kummert
JOURNAL OF BUILDING PERFORMANCE SIMULATION
(2012)
Article
Thermodynamics
Sebastien A. Brideau, Ian Beausoleil-Morrison, Michael Kummert
SCIENCE AND TECHNOLOGY FOR THE BUILT ENVIRONMENT
(2020)
Article
Construction & Building Technology
Adam Neale, Michael Kummert, Michel Bernier
JOURNAL OF BUILDING PERFORMANCE SIMULATION
(2020)
Article
Construction & Building Technology
Annie Pike, Michael Kummert
Summary: This study introduced a bottom-up approach using novel residential archetypes to simulate thermal energy demand in a remote community, revealing that thermal energy demands make up half of the fossil fuel consumption in the community and should be an important consideration in energy system decarbonization strategies.
JOURNAL OF BUILDING PERFORMANCE SIMULATION
(2021)
Article
Construction & Building Technology
Gregor Strugala, Michael Kummert, Martin Kegel
Summary: Variable capacity heat pumps are an important technology for reducing energy consumption and carbon emissions in cold climates. However, integrating them into building energy system design is challenging due to a lack of appropriate models. We developed a TRNSYS model that can simulate heat pump behavior and supplement manufacturer performance maps with experimental data.
JOURNAL OF BUILDING PERFORMANCE SIMULATION
(2022)
Article
Construction & Building Technology
Adam Neale, Michael Kummert, Michel Bernier
Summary: This paper presents a new bottom-up white-box building stock energy modelling approach, which is accurate in comparing the base case building stock with different technological variations. The model accurately predicts the energy use of a Canadian region's building stock and can be applied to assess the impact of heating system distributions on greenhouse gas emissions and peak electricity demand through a case study.
JOURNAL OF BUILDING PERFORMANCE SIMULATION
(2022)
Article
Thermodynamics
Benoit Delcroix, Marie-Andree Leduc, Michael Kummert
APPLIED THERMAL ENGINEERING
(2017)
Proceedings Paper
Construction & Building Technology
Ian Beausoleil-Morrison, Michael Kummert, Francesca Macdonald, Romain Jost, Timothy McDowell, Alex Ferguson
1ST INTERNATIONAL CONFERENCE ON SOLAR HEATING AND COOLING FOR BUILDINGS AND INDUSTRY (SHC 2012)
(2012)