Improvement And Energy Saving Design Of Rotary Wheel Dehumidification System

The energy consumption of the air conditioning dehumidification equipment occupies a large proportion in the total energy demand, especially in the building energy consumption. The rotary wheel dehumidification system is a combination of desiccant dehumidification and cooing dehumidification, which can achieve a perfect effect because of the comprehensive advantages. The traditional rotary wheel dehumidification consumes large amounts of electricity to complete the regeneration process though electric heating. The design of this paper can reduce the energy consumption and make full use of low grade energy based on the wheel hygroscopic selection and the design of the thermodynamic cycle process.At first the existing problems in the traditional rotary wheel dehumidification system is discussed and the solution is put forward- Low Temperature Regenerative Rotary Wheel Dehumidification System(LTRRWDS), which save the energy though the perfection of the rotary wheel and the recovery of the condensing heat. The energy consumption under the standard conditions is calculated which show that the LTRRWDS got 26% of energy saving than the traditional one in the summer.Through the analysis of the heat and mass transfer process of desiccant, the model of the rotary wheel dehumidification system is established combined with cooling equipment model. The simulation shows that the inlet temperature and humidity increase will cause the increase of air humidity and the regeneration temperature increase has the opposite influence.On the basis, the prototype of the LTRRWDS was completed. And the experiment should be carried out. And the experiment should be carried out to analyze that the influence of several important parameters change. The Result Expresses that processing and regeneration temperature has an effect on the system balance and the regeneration temperature take a greater role. The improvement of processing temperature have adverse effect on the condensation rate and DCOP. The increase in regeneration temperature and regeneration air volume make the system hygroscopicity improved and the DCOP first rise and then drop.Furthermore, there is still some energy waste of LTRRWDS due to the high condensation dehumidification capacity. Two-stage rotary wheel dehumidification system can improve the dehumidification rate through the two rotary wheel dehumidification processes. The amount of the condensation dehumidification and the energy consumption is reduced 14.4% under the same dehumidifying effect. However the system complexity increase at the same time.