Experimental Study On Single-disc-type Solar Collector System Performance

With the gradual depletion of traditional fossil energy and environmental problems have highlighted, there is universal concern about the development and use of solar energy. Disc-type solar thermal power generation systems with higher power generation efficiency, optimized features such as the great potential and become the focus of study. Heating system to achieve a transformation of solar energy to heat, its optical and electrical properties of the thermal performance of the entire system is essential. Thus, experimental studies of dish-type solar collector system are of great significance.Contents of this paper includes the following main aspects:1、First build a solar collector system experimental platform and experimental study on the thermal performance of the system. Experiments where Sun intensity from Beijing the day9:30to16:30curve and cavity-receiver for the measuring points temperature curve. As clouds obscured, fluctuations in direct solar radiation reaches the ground, and maximum value occurs at13:24,was1135W/m2;lighting outlet center and inner wall surface temperatures of the highest values appear in10:18and10:33,corresponds to the intensity of direct sun radiation respectively976W/m2and997W/m2.Additionally to the closed cooling water system, open cooling water system and open cooling water with glass windows has conducted three experiments. Experimental results:open cooling water with glass windows power maximum, is14.2%; using open cooling water without windows power followed by thermal power10.6%; the closed cooling water system without windows power minimum, is6.4%.Overall,the heat pipe evaporator and cooling water when temperature difference, the receiver power high, the opposite of low.2、Aimed at solving thermal power system and the problem of low collection efficiency, analyzes the problems existing in the system. The experimental platform exists:(1)The automatic tracking system of choice is the polar axis tracking system, the lower its tracking precision;(2) There is a certain lack of receiver installation;(3) larger overall platform installation error;(4) heat pipe arrangement of the four main issues, which are important causes of inefficient led to experiments.Innovation of this project is to reveal the single-disc-type solar heat-absorbing performance of the system and the analysis of problems in the system.The research of this subject was supported by National High Technology Research and Development Program of China "Coupling The Development and Demonstration of Renewable Energy Gas Cells"(2014AA052801); Gansu province outstanding Youth Science Fund project "Solar Thermal and Biomass with Complementary Research on Distributed Combined Cycle"(2012GS05601); Lanzhou University of technology "Hongliu Outstanding Talents Plan"(Q201101); Construction of scientific and technological projects in Gansu province (JK2010-29).