The Influence Of Interior Wall Construction On Indoor Thermal Environment Of Intermittent Heating Room

China learned from the heating model of the Soviet Union in the early time to divide the country into central heating and non-central heating areas by the Qinling-Huaihe.The hot summer and cold winter areas belong to non-centralized heating district,which include the middle and lower reaches of the Yangtze River and its surrounding areas.Seasonal features of the area are cold and high humidity in winter,which leads to low thermal comfort in the room.With the rapid economic development in hot summer and cold winter areas,lots of residents choose to install heating facilities.The hot summer and cold winter areas belong to non-centralized heating district,so the heating method there has the characteristics of "turn on the heating equipment while people are and turn it off while people leave",that is to say,residents can decide the heating time and space,which belongs to intermittent heating.According to the characteristics of intermittent heating,it is very different from the central heating in the north,which is mainly reflected in the heat transfer process.In an intermittently heated room,there are heat exchanges among the furniture and the wall and the room air.Besides,part of the energy in the heating room will be transmitted to the adjacent non-heating rooms.Therefore,the intermittent heating in the hot summer and cold winter areas is totally different from the central heating in the north,so another study is needed.In this paper,the numerical simulation method is used to simulate the temperature and energy consumption of the intermittent heating room.By analyzing the indoor air temperature,the temperature of each wall and the furniture,the effects of the external wall insulation,interior wall materials,outdoor air temperature,and the duration of heating on the thermal environment and condensation risk in the room with intermittent heating were studied.The results show that external wall insulation,interior wall construction,outdoor air temperature and heating duration all have effects on the indoor thermal environment and condensation risk.In the hot summer and cold winter areas,the use of internal thermal insulation for external walls of residential buildings is more conducive to improving the indoor thermal environment than the external thermal insulation methods,and the risk of condensation is also lower.The improvement effect of the internal wall structure on the indoor thermal environment from good to bad are aerated concrete block,reinforced concrete with thermal insulation mortar,reinforced concrete,respectively.The condensation risks of different internal wall structures from low to high are aerated concrete blocks,reinforced concrete,reinforced concrete with thermal insulation mortar,respectively,but the gap between the latter two is small.With the increase of heating time,aerated concrete blocks have a more prominent effect on the improvement of the indoor thermal environment,and a more significant reduction in the risk of condensation.Low outdoor temperatures can lead to frequent changes in the power of the heating equipment,frequent fluctuations in indoor air temperature,and reduce indoor thermal comfort.Increasing the heating time or the heating period can improve the indoor thermal environment and reduce the risk of condensation on the inner surface of the wall.