Study On Comprehensive Evaluation Method Of Residential Building Heating System In Hot Summer And Cold Winter Area

The area with hot summer and cold winter belongs to the non-traditional heating area,but its climatic characteristics and poor insulation performance of the envelope structure lead to poor indoor comfort in the condition of no heating measures in winter.With the continuous development of social economy,residents in this region have gradually generated heating demand.How to choose the optimal heating scheme according to the actual project is of great significance to the heating development in hot summer and cold winter areas.In this paper,a comprehensive evaluation model of residential building heating system is established from the perspective of different decision makers,and the decision-making method suitable for actual projects is explored,so as to provide assistance for the development of heating in hot summer and cold winter areas.In this paper,a comprehensive evaluation model of 2E-T heating system based on Technology,Economy and Energy was established from the perspectives of building developers,heating users and government policy orientation based on the method of network questionnaire survey and literature induction.Combined with the actual project,the subjective and objective combination weighting method is adopted to weight different indicators.From the perspective of the construction developer,the weights of initial investment cost and thermal comfort are 0.491 and 0.332 respectively,which are significantly higher than other indexes.From the perspective of thermal users,the weights of thermal comfort and annual life cycle cost are close to each other,which are 0.335 and 0.278,respectively.From the perspective of government policy orientation,energy conversion efficiency,primary energy consumption and environmental value of pollutants are the main influencing factors,and their weights are 0.260,0.242 and 0.204,respectively.Then,field and literature surveys were carried out on the indoor clothing of typical urban residents in hot summer and cold winter areas,and the results were fitted to obtain the functional relationship between the thermal resistance of clothing and indoor temperature in areas with characteristics of hot summer and cold winter.It was substituted into the simulation process of indoor people’s cold and hot feeling PMV by AIRPAK software and the simulation results were fitted to get the relationship between PMV and indoor and outdoor temperature and other parameters under specific heating habits in hot summer and cold winter areas.The indoor temperature corresponding to PMV 0 is taken as the suggested indoor design temperature for heating in this area.Finally,the comprehensive evaluation model is used to analyze the concrete engineering examples.It is found that the low-temperature floor radiant end is more favored by decision makers when the heat source is the same.The ground-water source heat pump with the same end is more in line with the national energy and environmental protection policies,but due to its high initial investment and operation costs,it is not as good as cogeneration from the perspective of building developers and heating users.The government can promote the development of renewable energy heating systems in regions with hot summer and cold winter through financial subsidies and other measures to provide support for sustainable development.In this paper,the comprehensive evaluation of residential building heating system in hot summer and cold winter area is studied by means of investigation and simulation,and the feasibility of the evaluation model is verified by analyzing the actual project,which provides some reference for the development of heating system in hot summer and cold winter area.