24 June 2014
A high efficient air-conditioning system for domestic use is needed to be developed because of the increasing of energy consumption in the residential and commercial sector. In Asia region of high temperature and high humidity, dehumidification requires a large of energy. Desiccant ventilation system is effective to reduce the energy consumption for dehumidification process. We focused Wakkanai siliceous shale (WSS) as a desiccant material, and a desiccant rotor using WSS was developed. The aim of this study is to develop a desiccant ventilation unit using the WSS rotor which can be regenerated by the waste heat from heat pump unit with low-temperature by numerical calculation. As a result, the performance of the dehumidification is predicted by combining a total heat exchange element which has 80 % of latent heat exchange efficiency and 90 % of sensible heat efficiency. This ombination is possible to regenerate WSS rotor at low-temperature of 35 – 45oC. In addition, we produced an actual desiccant unit combined with heat pump system, and this system was capable to treat the sensible heat load and latent heat load separately.