Influence Of Heating Time Ratio And Heating Power On Heating Characteristics And Energy Consumption In Intermittent Heating Rooms

With the rapid development of China's economy,people's living standards have been increasing,and people's comfort requirements in air-conditioned heating rooms have been improved.On the other hand,with the acceleration of China's modernization process,the percentage of building energy consumption is increasing.Building energy saving has become one of the most effective measures to solve the energy crisis.Therefore,how to achieve energy-saving effect mostly in meeting people's thermal comfort in a heating room is currently the most concerned issue.Due to the difference in climate and heating habits,the heating in hot summer and cold winter zone shows a periodicity that when it is needed,heating is turned on,and when not needed,turned off.Intermittent heating is used for summer and cold winter zone in winter.In the intermittent heating mode,since the temperature change range is larger than that of the continuous heating in the north,the temperature fluctuation range of the building envelope and the indoor thermal mass such as the furniture and the sofa is also greater.In this heating mode,the envelope and the indoor thermal mass with lower temperature will absorb the heat supplied by the heating equipment,thus affecting the indoor thermal environment and energy consumption.The study results and traditional method of continuous heating in the north region cannot be applied directly to this area.For the research of hot summer and cold winter regions,there is little related to the influence of the heating time ratio and the rated power of the heating equipment on the thermal environment and energy consumption of the intermittent heating room in winter.Therefore,in order to get the heating characteristics of intermittent heating rooms,the practical experiment method is used to compare two kinds of heating time ratio under two different thermal mass.Similarly,in order to get the influence of rated power of the heating equipment,on heating characteristics,two kinds of rated power of the heating equipment are established under different heating load to explore their impact on the thermal environment and energy consumption in intermittent heating rooms.The experimental results show that under intermittent heating conditions,the heating time ratio is larger,the initial air temperature and initial wall temperature of each heating are higher,and the time required to reach the target temperature is shorter,thus people's thermal comfort is better.The higher the rated power of room heating,the faster the room air temperature and wall surface temperature rise.The shorter time to reach the target temperature and the smaller the heating power,the longer time required to reach the target temperature when the heat load is large.The higher rated power of the heating equipment helps to improve the human body's thermal comfort in the heating room;the heat absorption and exothermic process of the thermal mass in the intermittent heating will affect the heating energy consumption of the room.When the heat storage capacity is relatively large,the heater will be activated and the stoppage of heating equipment is more frequent,thus the power consumption becomes larger,and the rate of decline in energy consumption per unit area becomes slower.Therefore,the intermittent heating performance cannot be directly studied by the steady-state calculation method in the northern continuous heating mode.Under the intermittent heating conditions,when the requirements of thermal comfort increase,it can be considered that room can be heating with larger heating time ratio when the heat storage capacity of the room is small,and the thermal comfort of people can be satisfied.