Interface System Analysis of the Application of Solar Energy in Buildings

China has made some achievements in the application of solar energy in buildings through years' effort and formed certain foundation in this field. To promote the application of solar energy in buildings and enhance application effect, the paper studies the solar energy system in buildings and analyzes some key factors affecting the application of solar energy by using the theories of interface system. According to the theories of interface system, this paper divides the system into technical interface, organization interface, contract interface and solid interface. Technical interface involves the selection of application forms of solar energy; organization interface involves the cooperation and communication of each entity in terms of the application of solar energy; contract interface involves the selection of contract mode in the application of solar energy in buildings; solid interface involves the accomplishment of the application of solar energy in engineering projects and this interface is determined by technical interface, contract interface, and organization interface. The effective management of the above interfaces can make the application of solar energy more cost-effective, practical and safer.