Development And Thermal Performance Of A Solar Thermal Conversion System With Vacuum Tube Collector And Pebble Bed Storage

In order to decrease energy depletion and emission of the main contamination in the central government, local government, research institute and enterprise in China have paid more attention to the development of renewable energy.In China, 80% of the population is in the country, so the configuration of rural buildings is very important to decrease the depletion of energy. Now, the villagers use the coal and fuel wood to control the temperature of the house. This can cause the environment pollution and is bad for ecosystem. So the researchers are now providing new technologies to use solar energy as a thermal storage system for the rural buildings. This technology can exchange the heat mass by the natural circulation without an energy consumption. If we can succeed in this research, it is an instructive technology for us to build a harmonious socialistic country in environment and energy. The main contents of this research are as follows:(1) The solar radiation was analyzed in the heating period (from November to March) and none heating period (from April to October) according to the weather data of Shenyang city for the past of 30-year periods. And the incident solar radiations in the different angle of incident solar radiation (horizontal solar radiation, vertical solar radiation and normal solar radiation) were analyzed and compared. When the vacuum tube solar collectors are vertical against the incident radiation, the minimum incident solar radiation, average incident solar radiation and maximum incident solar radiation of the daily mean solar radiation within a month of the gross solar radiation were 2.0 times, 1.8 times and 1.9 times as big as those of horizontal solar radiation. So the orientation angle is 56 degrees between solar collector and terra horizontal line, and given the matching connection between the solar thermal conversion...