Study On Heat Transfer Among Residential Buildings In Severe Cold Area In Heating Season

With the rapid development of China's economy,building energy consumption has grown rapidly.According to statistics,the energy consumption of buildings in China accounted for 27.6% of the total energy consumption in society in 2000.At the same growth rate,it is expected that the energy consumption of building will increase by at least 7 percentage points by 2020,of which the heating energy consumption will account for about 80% of the total building energy consumption in severe cold areas.It can be seen that heating energy consumption plays a decisive role and has the most potential for energy conservation.Household heat metering,the commercialization of heat,not only can mobilize the enthusiasm of heating companies,but also can improve people's awareness of energy conservation,and thus become an inevitable trend of building energy efficiency.In the implementation of household heat metering control,due to the characteristics of heat,adjacent households will be accompanied by serious interhouse heat transfer problems,which have dynamic and uncertainty,and can not be accurately measured.It become the main technical problem in the implementation process of the current household heat metering fee system.In this paper,a combination of field experiments and numerical simulation techniques are used.A typical residential building in a certain residential area of Yanji was selected.Several room temperature sensors were placed in each user.Room temperature sensors were used to monitor the average indoor temperature of the users.Under two conditions with different neighboring occupancy rates for heating users and typical users non-heating were to study the heat transfer between households.According to the experimental situation,the building model was built using CFD software.Through the method of finite element difference,the typical users in the heating season were simulated and numerically analyzed to calculate the indoor heat transfer amount.The comparison between the test results and the simulation results were compared and analyzed to verify the feasibility and accuracy of the CFD software to simulate the heat transfer problem between households.On this basis,a typical residential building model was built using CFD software.Through the dynamic simulation of the model,the impact of various factors on the heat transfer problem between households was analyzed,including location factor,occupancy rate,and interior design temperature.To investigate the increase in the average indoor temperature of non-heating users in the heating season,the percentage of the actual heat consumption of the heat transfer between households,and the increase in the cumulative heat consumption of heating users when there is heat transfer between households.It provides a theoretical basis for further improving the rationality of the household heat metering fee system and practically promoting the implementation of building energy conservation.