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

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.

Download Full-text

Effect of Temperature on Output Characteristic of Solar Cell Arrays

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.2675 ◽

2011 ◽

Vol 71-78 ◽

pp. 2675-2678 ◽

Cited By ~ 1

Author(s):

Sheng Xian Wei ◽

Chang Tao ◽

Hui Min Yang

Keyword(s):

Solar Cell ◽

Silicon Solar Cell ◽

Crystalline Silicon ◽

Effect Of Temperature ◽

Crystalline Silicon Solar Cell ◽

Cell Array ◽

Temperature Coefficients ◽

Super Cell ◽

Photovoltaic Thermal System ◽

Cell Arrays

In order to improve electric efficiency of solar cell arrays and obtain available heat energy, the solar trough concentration photovoltaic/thermal system has been constructed and the experiment performance and analysis of solar cell arrays have been carried out. The results show that in concentration the thermal efficiency of system linearly decreases with the temperature of cell arrays increasing. In non-concentration, the maximum power output (Pm) temperature coefficients of single crystalline silicon solar cell, polycrystalline silicon cell array and super cell array are -0.2 W/(m2·°C), -0.15 W/(m2·°C) and -0.16 W/(m2·°C), respectively. In concentration, the Pm temperature coefficients are -11.8 W/(m2·°C), -5.9 W/(m2·°C) and -5.1 W/(m2·°C).

Download Full-text

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

International Journal of Photoenergy ◽

10.1155/2014/360235 ◽

2014 ◽

Vol 2014 ◽

pp. 1-7 ◽

Cited By ~ 2

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.

Download Full-text

Experimental Study of a Novel Heat Pipe-Type Photovoltaic/Thermal System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.347-353.403 ◽

2011 ◽

Vol 347-353 ◽

pp. 403-408

Author(s):

Tao Zhang ◽

Gang Pei ◽

Hui De Fu ◽

Jie Ji ◽

Yue Hong Su

Keyword(s):

Experimental Study ◽

Heat Pipe ◽

Second Law ◽

Thermal System ◽

System A ◽

Photovoltaic Thermal System ◽

T System

In order to solve the freezing problem associated with the traditional photovoltaic/thermal (PV/T) system, a novel heat pipe-type PV/T (HP-PV/T) system was designed and constructed in the present study. Outdoor tests were carried out from May to July, 2010. The performance of the system was also studied. The results showed that the average photothermal efficiency was 41.30% and the photoelectric efficiency was 9.42%. The average first law efficiency of the system was 48.52%, and the second law efficiency of 6.87%

Download Full-text