Study On Optimal Design Of Building Roof Integrated Photovoltaic And Thermal Systems In Hot-humid Regions

Human development is inseparable from energy. Nowadays, development and utilization of renewable energy become important researches with fossil fuels dwindling. Solar energy is an abundant source of clean energy, which has a very high value and unique advantages. Solar water thermal system and solar photovoltaic system are two solar technologies which are mature and widely used together with architecture.Building roof integrated photovoltaic and thermal systems, providing hot water and electricity nearby without taking up extra land, has significant energy efficiency. It is an important direction towards sustainable architecture development. Targeted study on the optimal design of building roof integrated photovoltaic and thermal systems is an important way to promote the development of building integrated photovoltaic and thermal, as well as an effective way to achieve building energy efficiency and to alleviate the energy shortage. Nowadays, the design level of building roof integrated photovoltaic and thermal systems in our country is still in its infancy. There are many obstacles needed to be improved in completed projects.For example: The integration of building roof with photovoltaic and thermal is at low degree; The integrated forms of solar systems and roofs are single; The Photovoltaic and thermal systems are at low efficiency; The functions of building roof are not good enough.This study further elaborates the theoretical basis of building roof integrated photovoltaic and thermal systems. To solve the problems above, this study proposes optimal design strategies and optimum design processes of building roof integrated photovoltaic and thermal in hot-humid regions, from the perspective of system efficiency optimization, roof function optimization, and roof image optimization.This study takes the swimming pool ancillary building’s roof integrated photovoltaic and thermal systems in South China University of Technology as an example, and further elaborates the design process of building roof integrated photovoltaic and thermal. By testing the efficiency of photovoltaic and thermal systems, as well as the indoor illumination, this study validates the actual effect of optimal design, hoping to provide experiences and references for related researches and projects.