scholarly journals Experiment Investigation on Electrical and Thermal Performances of a Semitransparent Photovoltaic/Thermal System with Water Cooling

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Guiqiang Li ◽  
Gang Pei ◽  
Ming Yang ◽  
Jie Ji
Keyword(s):  
Thermal Efficiency ◽  
Electrical Power ◽  
Hot Water ◽  
Air Cooling ◽  
Thermal System ◽  
Water Cooling ◽  
Building Integrated Photovoltaic ◽  
Photovoltaic Thermal System ◽  
Set Up ◽  
T System

Different from the semitransparent building integrated photovoltaic/thermal (BIPV/T) system with air cooling, the semitransparent BIPV/T system with water cooling is rare, especially based on the silicon solar cells. In this paper, a semitransparent photovoltaic/thermal system (SPV/T) with water cooling was set up, which not only would provide the electrical power and hot water, but also could attain the natural illumination for the building. The PV efficiency, thermal efficiency, and exergy analysis were all adopted to illustrate the performance of SPV/T system. The results showed that the PV efficiency and the thermal efficiency were about 11.5% and 39.5%, respectively, on the typical sunny day. Furthermore, the PV and thermal efficiencies fit curves were made to demonstrate the SPV/T performance more comprehensively. The performance analysis indicated that the SPV/T system has a good application prospect for building.

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.

Building Integrated Photovoltaic Module-Based on Aluminum Substrate With Forced Water Cooling

2018 ◽  
Vol 140 (2) ◽  
Author(s):  
Wei Pang ◽  
Yongzhe Zhang ◽  
Yanan Cui ◽  
Hongwen Yu ◽  
Yu Liu ◽  
...  
Keyword(s):  
Solar Energy ◽  
Glass Substrate ◽  
Operating Temperature ◽  
Aluminum Substrate ◽  
Photovoltaic Module ◽  
Water Cooling ◽  
Electrical Efficiency ◽  
Building Integrated Photovoltaic ◽  
Pv Cell ◽  
T System

The increase of operating temperature on a photovoltaic (PV) cell degrades its electrical efficiency. This paper is organized to describe our latest design of an aluminum substrate—based photovoltaic/thermal (PV/T) system. The electrical efficiency of the proposed PV/T can be increased by ∼ 20% in comparison with a conventional glass substrate-based PV. The work will benefit hybrid utilization of solar energy in development of building integrated photovoltaic systems.

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 Modeling and Characteristic Parameters Analysis of a Trough Concentrating Photovoltaic/Thermal System with GaAs and Super Cell Arrays

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Xu Ji ◽  
Ming Li ◽  
Weidong Lin ◽  
Wenbo Wang ◽  
Liuling Wang ◽  
...  
Keyword(s):  
Thermal System ◽  
Characteristic Parameters ◽  
Cell Array ◽  
Super Cell ◽  
Mirror Reflectivity ◽  
Photovoltaic Thermal System ◽  
Calculation Results ◽  
Cell Arrays ◽  
The One ◽  
T System

The paper established the one-dimension steady models of a trough concentrating photovoltaic/thermal system with a super cell array and a GaAs cell array, respectively, and verified the models by experiments. The gaps between calculation results and experimental results were less than 5%. Utilizing the models, the paper analyzed the influences of the characteristic parameters on the performances of the TCPV/T system with a super cell array and a GaAs cell array, respectively. The reflectivity of the parabolic mirror in the TCPV/T system was an important factor to determine the utilizing efficiency of solar energy. The performances of the TCPV/T system can be optimized by improving the mirror reflectivity and the thermal solar radiation absorptivity of the lighting plate and pursuing a suitable focal line with uniform light intensity distribution. All these works will benefit to the utilization of the trough concentrating system and the combined heat/power supply.

scholarly journals Improving the Hybrid Photovoltaic/Thermal System Performance Using Water-Cooling Technique and Zn-H2O Nanofluid

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
Hashim A. Hussein ◽  
Ali H. Numan ◽  
Ruaa A. Abdulrahman
Keyword(s):  
Flow Rate ◽  
Rear Surface ◽  
Weather Conditions ◽  
Energy Output ◽  
Thermal System ◽  
Water Cooling ◽  
Electrical Efficiency ◽  
Optimum Flow Rate ◽  
Photovoltaic Thermal System ◽  
Cooling Technique

This paper presented the improvement of the performance of the photovoltaic panels under Iraqi weather conditions. The biggest problem is the heat stored inside the PV cells during operation in summer season. A new design of an active cooling technique which consists of a small heat exchanger and water circulating pipes placed at the PV rear surface is implemented. Nanofluids (Zn-H2O) with five concentration ratios (0.1, 0.2, 0.3, 0.4, and 0.5%) are prepared and optimized. The experimental results showed that the increase in output power is achieved. It was found that, without any cooling, the measuring of the PV temperature was 76°C in 12 June 2016; therefore, the conversion efficiency does not exceed more than 5.5%. The photovoltaic/thermal system was operated under active water cooling technique. The temperature dropped from 76 to 70°C. This led to increase in the electrical efficiency of 6.5% at an optimum flow rate of 2 L/min, and the thermal efficiency was 60%. While using a nanofluid (Zn-H2O) optimum concentration ratio of 0.3% and a flow rate of 2 L/min, the temperature dropped more significantly to 58°C. This led to the increase in the electrical efficiency of 7.8%. The current innovative technique approved that the heat extracted from the PV cells contributed to the increase of the overall energy output.

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