Heat Response Model for Phase Layered Topology in A Photovoltaic Thermal System

2017 ◽  
Vol 7 (1) ◽  
pp. 52 ◽  
Author(s):  
Mohammad Taghi Hajibeigy ◽  
Chockalingam Aravind Vaithilingam ◽  
Mushtak Al-atabi ◽  
PRP Hoole
Keyword(s):  
Heat Transfer ◽  
Thermal Energy ◽  
Heat Removal ◽  
Electrical Energy ◽  
Aluminum Plate ◽  
Thermal System ◽  
Pv Module ◽  
Photovoltaic Thermal System ◽  
Heat Response ◽  
Photo Voltaic

The electrical and thermal energy generated by a Photo-voltaic (PV) module is based on the amount of the solar radiation directed on the PV module. In this study, a Photo-voltaic Thermal (PVT) system is constructed to maximize the electrical energy generation through the fast removal of heat through a new phase layered topology. The combinations of aluminum plate and heatsinks are used to transfer heat generated by sunlight radiation on PV modules to heat transfer thermal container. The aluminum plate is attached beneath the PV module and heatsinks welded beneath the alumni plate making it as a phase layered heat removal. The heat transfer on each layer of the photovoltaic thermal system is investigated with the phase changing topology and also investigated for its performance with a heat removal agent. In both cases, with and without water as coolant in the thermal container, the experimental outcome is analysed for performance analysis. It is found the PV temperature reduced by about 10 degrees which is cirtical for the PV performance reducing the wasted thermal energy and thereby increases the electrical energy conversion.

scholarly journals Design of a Hybrid Photovoltaic Thermal System in Lebanon

2018 ◽  
Vol 171 ◽  
pp. 02002
Author(s):  
Elie Karam ◽  
Patrick Moukarzel ◽  
Maya Chamoun ◽  
Charbel Habchi ◽  
Charbel Bou-Mosleh
Keyword(s):  
Power Output ◽  
Electrical Power ◽  
Hot Water ◽  
Thermal System ◽  
Conduction Model ◽  
Electrical Efficiency ◽  
Pv Module ◽  
Temperature Loss ◽  
Photovoltaic Thermal System ◽  
Electrical Power Output

Due to global warming and the high toxic gas emissions of traditional power generation methods, renewable energy has become a very active topic in many applications. This study focuses on one versatile type of solar energy: Hybrid Photovoltaic Thermal System (hybrid PV/T). Hybrid PV/T combines both PV and thermal application and by doing this the efficiency of the system will increase by taking advantage of the temperature loss from PV module. The solar radiation and heat will be harnessed to deliver electricity and hot water simultaneously. In the present study a solar system is designed to recycle the heat and improve the temperature loss from PV module in order to supply both electricity and domestic hot water. The project was tested twice in Zouk Mosbeh - Lebanon; on May 18, 2016, and June 7, 2016. The average electrical efficiency was around 11.5% with an average electrical power output of 174.22 W, while with cooling, the average electrical efficiency reaches 11% with a power output of 200 W. The temperature increases by about 7 degrees Celsius from the inlet. The 1D conduction model is also performed in order to design the hybrid PV/T system.

A review on the application of photovoltaic thermal systems for building façades

2019 ◽  
Vol 41 (1) ◽  
pp. 86-107 ◽  
Author(s):  
Ahmad Riaz ◽  
Ruobing Liang ◽  
Chao Zhou ◽  
Jili Zhang
Keyword(s):  
Thermal Energy ◽  
Large Scale ◽  
Electrical Energy ◽  
Building Envelope ◽  
Hot Water ◽  
Working Fluid ◽  
Thermal Systems ◽  
Air Supply ◽  
Building Facades ◽  
Photovoltaic Thermal System

The hybrid photovoltaic-thermal system has shown great progress. Electrical energy is produced from PV panels while thermal energy is produced via a working fluid carried through the panels. In this paper, the vertical PV/T is introduced using working fluids such as air and liquid, which serve to control the excess temperature of the PV panels as well as to collect heat to be made available as thermal energy. Installations of PV/T systems on building façades, as well as integration with other technologies such as heat pipe and heat pump are also discussed. Current studies of such building integration technologies are also explored, including the scale of application. This study aims to provide constructive information which can be used in future development of building facades for large-scale applications, to contribute to future sustainable development. Practical application: This study helps researchers and engineers who are considering photovoltaic thermal systems for building façades to have better understanding of its effect on electrical and thermal energy – for space heating, fresh air supply and hot water supply – using an active building envelope.

scholarly journals Glazed Photovoltaic-thermal (PVT) Collectors for Domestic Hot Water Preparation in Multifamily Building

2020 ◽  
Vol 12 (15) ◽  
pp. 6071
Author(s):  
Nikola Pokorny ◽  
Tomáš Matuška
Keyword(s):  
Thermal Energy ◽  
Simulation Study ◽  
Water System ◽  
Hot Water ◽  
Electrical Performance ◽  
Electricity Production ◽  
Thermal System ◽  
Conventional System ◽  
Domestic Hot Water ◽  
Photovoltaic Thermal System

Photovoltaic–thermal collector generates electrical and thermal energy simultaneously from the same area. In this paper performance analysis of a potentially very promising application of a glazed photovoltaic–thermal collector for domestic hot water preparation in multifamily building is presented. Solar system in multifamily building can be installed on the roof or integrated in the façade of the building. The aim of this simulation study is to show difference of thermal and electrical performance between façade and roof installation of a glazed photovoltaic-thermal collectors at three European locations. Subsequently, this study shows benefit of photovoltaic-thermal collector installation in comparison with side-by-side installation of conventional system. For the purpose of simulation study, mathematical model of glazed photovoltaic-thermal collector has been experimentally validated and implemented into TRNSYS. A solar domestic hot water system with photovoltaic–thermal collectors generates more electrical and thermal energy in comparison with a conventional system across the whole of Europe for a particular installation in a multifamily building. The specific thermal yield of the photovoltaic–thermal system ranges between 352 and 582 kWh/m2. The photovoltaic–thermal system electric yield ranges between 63 and 149 kWh/m2. The increase in electricity production by the photovoltaic–thermal system varies from 19% to 32% in comparison with a conventional side-by-side system. The increase in thermal yield differs between the façade and roof alternatives. Photovoltaic-thermal system installation on the roof has higher thermal yield than conventional system and the increase of thermal yield ranges from 37% to 53%. The increase in thermal yield of façade photovoltaic-thermal system is significantly higher in comparison with a conventional system and ranges from 71% to 81%.

scholarly journals Characteristics Study of Photovoltaic Thermal System with Emphasis on Energy Efficiency

2018 ◽  
Vol 152 ◽  
pp. 01003
Author(s):  
Chuah Yee Yong ◽  
Mohammad Taghi Hajibeigy ◽  
Chockalingam Aravind Vaithilingam ◽  
Rashmi Gangasa Walvekar
Keyword(s):  
Experimental Data ◽  
Energy Efficiency ◽  
Solar Energy ◽  
Thermal Energy ◽  
Heat Energy ◽  
Thermal System ◽  
Electrical Efficiency ◽  
Pv Panel ◽  
Photovoltaic Thermal System ◽  
Lower Temperature

Solar energy is typically collected through photovoltaic (PV) to generate electricity or through thermal collectors as heat energy, they are generally utilised separately. This project is done with the purpose of integrating the two systems to improve the energy efficiency. The idea of this photovoltaic-thermal (PVT) setup design is to simultaneously cool the PV panel so it can operate at a lower temperature thus higher electrical efficiency and also store the thermal energy. The experimental data shows that the PVT setup increased the electrical efficiency of the standard PV setup from 1.64% to 2.15%. The integration of the thermal collector also allowed 37.25% of solar energy to be stored as thermal energy. The standard PV setup harnessed only 1.64% of the solar energy, whereas the PVT setup achieved 39.4%. Different flowrates were tested to determine its effects on the PVT setup’s electrical and thermal efficiency. The various flowrate does not significantly impact the electrical efficiency since it did not significantly impact the cooling of the panel. The various flowrates resulted in fluctuating thermal efficiencies, the relation between the two is inconclusive in this project.

scholarly journals Experimental Investigations Conducted for the Characteristic Study of OM29 Phase Change Material and Its Incorporation in Photovoltaic Panel

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 897 ◽  
Author(s):  
Rajvikram Elavarasan ◽  
Karthikeyan Velmurugan ◽  
Umashankar Subramaniam ◽  
A Kumar ◽  
Dhafer Almakhles
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Energy ◽  
Energy Demand ◽  
Back Surface ◽  
Experimental Investigations ◽  
Rear Side ◽  
Pv Module ◽  
Change Material

The solar photovoltaic (PV) system is emerging energetically in meeting the present energy demands. A rise in PV module temperature reduces the electrical efficiency, which fails to meet the expected energy demand. The main objective of this research was to study the nature of OM29, which is an organic phase change material (PCM) used for PV module cooling during the summer season. A heat transfer network was developed to minimize the experimental difficulties and represent the working model as an electrical resistance circuit. Most existing PV module temperature (TPV) reduction technology fails to achieve the effective heat transfer from the PV module to PCM because there is an intermediate layer between the PV module and PCM. In this proposed method, liquid PCM is filled directly on the back surface of the PV module to overcome the conduction barrier and PCM attains the thermal energy directly from the PV module. Further, the rear side of the PCM is enclosed by tin combined with aluminium to avoid any leakages during phase change. Experimental results show that the PV module temperature decreased by a maximum of 1.2 °C using OM29 until 08:30. However, after 09:00, the OM29 PCM was unable to lower the TPV because OM29 is not capable of maintaining the latent heat property for a longer time and total amount of the PCM experimented in this study was not sufficient to store the PV module generated thermal energy for an entire day. The inability of the presented PCM to lower the temperature of the PV panel was attributed to the lower melting point of OM29. PCM back sheet was incapable of dissipating the stored PCM’s thermal energy to the ambient, and this makes the experimented PCM unsuitable for the selected location during summer.

Performance Analysis of Innovative Top Cooling Thermal Photovoltaic (TPV) Modules Under Tropics

2016 ◽  
Author(s):  
Swapnil Dubey ◽  
C. S. Soon ◽  
Sin Lih Chin ◽  
Leon Lee
Keyword(s):  
Solar Energy ◽  
Thermal Energy ◽  
Waste Heat ◽  
Heat Removal ◽  
Hot Water ◽  
Photovoltaic Module ◽  
Cell Temperature ◽  
Collector System ◽  
Pv Panel ◽  
Pv Module

The main focus area of this research paper to efficiently remove the heat generated during conversion of solar energy into electricity using photovoltaic (PV) module. The photovoltaic conversion efficiency of commercial available PV module varies in the range of 8%–20% depending on the type of solar cell materials used for the module construction, e.g. crystalline silicon, thin film, CIGS, organic, etc. During the conversion process, only a small fraction of the incident solar radiation is utilize by PV cells to produce electricity and the remaining is converted into waste heat in the module which causes the PV cell temperature to increase and its efficiency to drop. This thermal energy could be extract using air or water as a heat removal fluid to utilize in heating applications. The purpose of a solar photovoltaic module is to convert solar energy into electricity. The hybrid combination of photovoltaic module and thermal collector called Photovoltaic-thermal (PVT) module. Such PVT module combines a PV, which converts electromagnetic radiation (photons) into electricity, with a solar thermal module, which captures the remaining energy and removes waste heat from the PV module. Cooling of cells either by natural or forced circulation can reduce the PV cell temperature. The simultaneous cooling of the PV cells maintains their PV efficiency at a satisfactory level and offers a better way of utilizing solar energy by generating thermal energy as well. PVT system has higher overall efficiency as compared to separate PV and thermal collector. The heat output of a PVT module can be used for space heating or production of domestic hot water. This paper presents an innovative design of top cooling Thermal Photovoltaic (T-PV) module and its performance under outdoor weather condition of Singapore. T-PV collector is designed to flow fluid over the top of PV panel through a very narrow gap between the solar lens. This process improves heat removal process from PV panel, and hence, improves the electrical output of PV panel as compared to other PVT collector available in the market. By flowing the water from top of the PV panel will also provide better thermal efficiency. A T-PV collector system with storage tank, sensors, pump, flow meters, data logger and controls, have been installed at test-site located in Ngee Ann Polytechnic, Singapore. Performance analysis of T-PV collector system has been evaluated under the tropical climatic conditions of Singapore. It was found that T-PV module could produce additional electrical power as compared to standard PV panel of same capacity by operating at lower temperature. In addition to electricity, T-PV panel also generate the hot water up to 60 deg C at an average thermal efficiency of 41% for usage in residential and commercial buildings. The average thermal energy output was 3.1 kWh/day on typical day’s basis.

Thermal Efficiency of the Photovoltaic Thermal System with Serpentine Tube Collector

2014 ◽  
Vol 699 ◽  
pp. 455-461 ◽  
Author(s):  
M.A.M. Rosli ◽  
Suhaimi Misha ◽  
Kamaruzzaman Sopian ◽  
Sohif Mat ◽  
Mohd Yusof Sulaiman ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Thermal Energy ◽  
Thermal Efficiency ◽  
Thermal Model ◽  
Energy Resources ◽  
Thermal System ◽  
Renewable Energy Resources ◽  
Photovoltaic Thermal System ◽  
Reduced Temperature

Photovoltaic thermal (PVT) system is one of the renewable energy resources that produce electric and thermal energy simultaneously. One of the key parameters to ensure good performance of the PVT is the design of the collector absorber. In this study, a thermal model of the PVT was developed to predict the thermal efficiency of the system. Simulations were conducted on four configurations of the serpentine tube. Results showed that the best design could achieve 50% thermal efficiency at zero reduced temperature. Our findings indicate that the shape, gap, and diameter of the tubes of the absorber are crucial to the good performance of the PVT.

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