Theory and key technology of renewable energy utilization in building, theory and technology of building indoor air environment control

Focusing on the basic scientific problems and key technologies in renewable energy in green building and control of artificial environment, the team has carried out a lot of researches in PV - thermal integrated utilization and solar composite heat pump system, theory and key technology of seawater source heat pump, indoor contamination source identification and catalytic degradation. The structural parameters and operating strategy of the heat pipe PV - thermal composite heat pump water heating system are improved, and the annual energy saving rate of the system has reached 79.4%, CO₂ emission reduction decreased by 73.9%, and life cycle cost reduced by 57.3%; based on numerical simulation technology, the team has studied the purification effect of various photocatalysts on indoor air pollutants, and analyzed the effect of airflow organization on the purification efficiency of indoor air contaminants, proposed the building environment and energy consumption optimization algorithm based on neural network and genetic algorithm, and analyzed the thermal insulation performance of aerogel and other materials; for the heating characteristics of buildings in cold coastal areas, the operating range of heat pump source is expanded to low temperature phase change zone to replace electric assistance to complete the heating task in the coldest heating period with the remarkable system energy saving effect; thermal economy and configuration-operation co-optimization of the integrated energy system were studied based on the theory of economic analysis and intelligent optimization algorithm, and the integrated thermal economic cost analysis model and co-operation strategy were proposed.