Research On Solar Thermal Utilization Integrated With Slope Roof Structures

According to the long-term existence main problems of the application process of solar thermal technology, as well as the adaptation of technology trends in Building Energy Saving flat pitched, also based on the study of solar thermal technology and the characteristics of the sloping roof, a set of integration technology design of solar thermal utilization and slope roof structure was put forward. The design including the integration the collector with the sloping roof and the integration active with passive solar collector technology.At present, the research on the integration of pitched roof with collectors and the optimal combination of active collectors, passive solar collector, the collector of the auxiliary technology are relatively few at home and abroad. Therefore, it is obviously important to promote the technology in the new sloping roof buildings of the lower house or flat pitched building applications and the urgency and importance of the research.First, the development of solar thermal using technology, energy-saving of roofs on existing buildings and the application background of the integration of solar thermal technology with construction are introduced. And the progress of research and application of the use of solar thermal technologies are reviewed. In light of the main topic of analysis of current situation presented as follows:the integration of solar collectors with pitched roof building on form, structure, function integration; the integration of active collector, passive solar collector and auxiliary heating systems with pitched roof.Then, the experiment of gathering solar radiation amount and experiment of solar collector system were conducted under the conditions of the winter solstice day. The results show that the use of solar thermal under winter solstice conditions exist that solar radiation is less, heat stability is poor, can’t provide the quality and quantity of required water of life 。 And the annual solar collector system (no auxiliary heat) was simulated by TRNSYS, to obtain simulation results shows that improving the efficiency of the collector and the collector efficiency of auxiliary heat source is the effective measure to improve the solar collector system.Thereafter, the solar collector system was optimizationly studied. Using optics theoretical analysis of the collector transparent cover,drawning refractive road map of three shape transparent cover of flat, curved and lens, a approach of enhanced set of light and heat collection efficiency was proposed:using curved lens transparent cover; Using energy simulation software EQUEST to simulate air source heat pump on different temperature conditions, and analyzing the relationship between COP and temperature conditions, drawing the methods of air source heat pumps to improve efficiency and reduce energy consumption:improving the working environment temperature of air source heat pump.Finally, according to the theory and simulation analysis, a solar collector modules device integrated with sloping roof building and the integration solar collector technology of active with passive on slope roof can be designed. Then the rationality and energy-saving advantages of the design also can be analyzed by using optical theory and software EQUEST.This study proposes a collector modular device design using the lens collector technology, which have a good set of light effects and high collection efficiency; Using a simulation-watt technology, have a better integration of the structure, appearance and function of a sloping roof; using modular technology, freedom of assembly design depending on the hot water load demand.The module device, passive solar houses sloping roof, and air-source heat pump technology can be combined in this design of collector system. The program to maximize the use of solar thermal radiation, including active and passive solar collector, the collector has better collector effects and energy-saving effect, the winter is more obvious; maximize the integration of solar collector system with pitched roof structure.The results of this study may can be provided as a new technical reference of the product design of solar energy companies and the new sloping roof buildings of the lower house or flat pitched building applications.