2段除湿型デシカント空調プロセス

- 室内還気を再生空気とする全換気型プロセスの性能評価 -

抄録

2-rotor desiccant cooling process consisting of a honeycomb rotor dehumidifier and a sensible heat exchanger is a mainstream of the desiccant cooling process which are practically applied to supermarket, hospital and so on. However, this process cannot produce a sufficient dehumidifying performance in high humidity region. In this study, 4-rotor desiccant cooling process equipped with a double stage dehumidification was proposed and investigated experimentally. In this process, regeneration temperature around 60°C could produce a sufficient dehumidifying performance even at high ambient humidity. “Serial heat supply” mode was considered to improve the heat efficiency by the cascade use of regeneration heat inside the cooling cycle. The dehumidifying performance of the “serial heat supply” mode was only slightly lower than that of a “parallel heat supply” mode at which the same temperature hot air was supplied to the both heaters. However, dehumidifying performance of this “serial heat supply” mode was much higher than that of conventional 2-rotor desiccant cooling process. Furthermore, the desiccant rotors of 0.1m in thickness were mounted to 4-rotor desiccant cooling process in place of the 0.2m desiccant rotors. It was found that the drop of dehumidifying performance of the process equipped with 0.1m desiccant rotors was only by 10 percents comparing with the 0.2m rotor process. Moreover, it was found that optimization of rotation speed of the desiccant rotor was needed to improve the energy efficiency. Regarding the supply point of return air, it was also found that return air should be supplied to the regeneration inlet of the second stage for higher dehumidifying performance.