Performance Study Of Intermittently Reversing Total Heat Exchanger

With China's rapid economic development, energy use has increased substantially. Duing to the increase in floor area and construction of high energy consumption, building energy consumption accounts for a growing proportion of energy use. On the other hand, people takes more attention to indoor air quality. To ensure indoor air quality, people usually increase the volume of outdoor air, however this increases the energy consumption. As an effective air heat recovery technology, intermittently reversing total heat exchanger can effectively cope with this problem.In this paper, we put forward a new method to study the total heat exchanger. It is thought that sensible heat and latent heat is handled separately. According to this assumption, we establish the mathematical models. With the theory of dispersion model of temperature flat of the solid, the switch time of the heat exchanger is presented and the time will be checked by the experiments results lately. We use matlab to solve the mathematical models established above. The result is used to describe the performance of the heat exchanger.According to the characteristics of the heat exchanger, experimental table is set up. The experimental data verified the correctness of the numerical solution. We study the efficiency and the loss of pressure after the sensible heat part and the lateen heat part is combined in a certain way. The results show efficiencies raise and pressure loss increases. Three different structural forms of the total heat exchanger are experimentally compared, the first structure has the highest sensible heat efficiency and latent heat efficiency, and has a lowest pressure loss. When compared to the heat exchanger with jute, the one with silica gel has higher efficiency and lower pressure loss.