Research On Application Evaluation And Improvement Of Sensible Heat Storage Electric Heating Device

The essence of global warming and deterioration of air quality caused by climate change and the energy crisis is not the issue of saving the planet,but the issue of saving humanity itself,and more importantly,how people improve their quality of life and how to develop sustainably.High-efficiency,low-carbon,economical,safe,and comfortable thermal storage electric heating method uses low-valley electricity to heat the thermal storage material at night,and releases the stored heat during the day to the user,which achieves the purpose of power grid peak reduction and valley reduction,and reduces The cost of residential heat meets winter heating needs,which is the answer to the above questions in the field of clean heating in non-centralized heating areas.However,with the rapid development of thermal storage technology,thermal storage systems,and thermal storage materials,there is also a problem of mismatch between supply and demand in the scientific research field and engineering application fields,such as: the radiation radius and radiation cycle of thermal storage electric heating devices are not clear,and the thermal storage The outstanding contradictions of the device have not been resolved,the heat storage density of the heat storage material needs to be strengthened,and so on.Based on the sensible heat storage electric heating device,this paper uses the experimental research method to set up a high-density temperature measuring point experimental bench and conducts an indoor temperature field test experiment.Combined with MATLAB software,the change law of room temperature with time was explored,and the influence of meteorological environment and heat storage time on the temperature distribution in the climate was analyzed.The experimental data was processed by SPSS software,and the reliability of arithmetic average,weighted volume average,median,and robust average to the temperature in the comprehensive evaluation area was explored.Research shows that the indoor room has a small horizontal temperature gradient,a relatively uniform temperature,and a large vertical temperature gradient.The maximum outdoor temperature is 0° C-5° C,and the minimum temperature is-10° C to-15° C.After the heat stops,the temperature can be maintained for at least 16 hours above 16° C.The higher the outdoor temperature,the longer the heat storage time,the longer the room temperature stays within the comfortable range,and the longer the ability of the electric heater to maintain its high temperature state.Based on the experimental results,the theoretical analysis calculation method was used to perform energy balance analysis,entropy analysis,radon analysis,energy level analysis,and thermoeconomic analysis on sensible heat storage electric heating devices,and comprehensively evaluated the sensible heat storage electric heating devices.Thermal,economical performance.The study found that the primary energy efficiency of the sensible heat storage electric heating device was 37.14%.Under the rated working conditions for 8 hours of heat storage,the entropy of the equipment and the environment changed to 82.11 k J/K and 159.55 k J/K,respectively.The heat storage efficiency of the system was 8,9,and 10 hours,and the system efficiency was 75.63%,74.99%,and 74.22%,respectively.The input energy level of the sensible heat storage electric heating system is 1,and the output energy level is determined by the radon efficiency.Based on experimental and theoretical calculations,a new sensible heat storage material composited with conductive carbon black and Mg O,F2O3 was prepared for the problem of insufficient heat storage density of the heat storage material.It was characterized by SEM,TG-DSC,XRT,etc.Means to test and analyze it to understand its microscopic morphology and structural characteristics.The characterization results show that the composite of carbon black changes the structure of the thermal storage material and reduces the crystallinity,but the crystal properties are not damaged.The composite materials exhibited different degrees of weightlessness.All carbon blacks were decomposed at high temperatures,and the effective working temperature inside the electric heating device was 550° C.Before the carbon black is decomposed,the heat absorption rate of the composite material has a positive correlation with the carbon black composite ratio,indicating that the addition of carbon black increases the heat storage density of the composite material.The research results in this paper provide new directions and ideas for further deepening and improvement of sensible heat storage electric heating devices and materials,and provide technical references for the development of heat storage electric heating industry and the improvement of heating and energy saving.