| The heat storage technology in the heating system can make rational use of the low electricity consumption.In the low electricity consumption period,the cheap electricity can be converted into heat energy and stored in the heat storage materials.When the electricity price is high in the daytime,the heat energy stored in the heat storage materials can be released,so as to achieve the purpose of "cutting peak and filling valley",smoothing the electricity consumption curve and saving the user’s operating cost.Heat storage technology can not only relieve the pressure of power supply in peak period,but also effectively solve the problem of large gap between peak and valley.In this paper,based on the basic principles of thermodynamics and the method of literature analysis,the method of electric heat storage floor heating is theoretically analyzed,and the flat phase change material heat storage and thermoelectric heating model is established.On the issue of heat storage and release,the three-dimensional model is transformed into two-dimensional cross section,and the heat storage problem is transformed from three-dimensional model to two-dimensional model,which greatly reduces the difficulty of research.By using the enthalpy porosity calculation method,the liquid fraction is introduced to indirectly describe the change process of the solid-liquid interface,which solves the isothermal phase transformation and the phase transformation problem in a certain temperature range.According to the data characteristics and evaluation requirements of the survey,three reference conditions which have an important impact on the actual use value of the heat storage floor are taken as the research objects,including the room temperature after the end of the electric heating film heating,the room temperature after the end of the heat release of the heat storage material,and the thickness of the electric heating film floor.These variables not only reflect the influence of the electric heat storage plate on the room temperature,but also reflect the heat storage module It is an important basis for practical design.When the electricity price is in the valley period,the electric heating film uses low-cost electric energy to heat the room,so that the indoor temperature is always above the comfortable temperature range of human body;when the electricity price is in the peak period,the heat storage material uses the heat absorbed during the valley period to release heat,so that the indoor temperature is always below the comfortable temperature range of human body.Finally,an appropriate model is selected to simulate the heat storage and release process in the design standard room.Finally,through the economic analysis of the same room with electric storage heating and central heating,the recovery period of electric storage heating is obtained. |
