关键词: 热泵, 低温烘干, 除湿速率, 节能

Abstract: Based on the mechanical heat pump dehumidification principle, combined with the drying temperature requirements of washing machine, this paper designed a type of air circulations system under low temperature for the drying cycles in cloth dryers . A simulation model was established using EES software. This paper presented the thermodynamic performance and influencing factors of critical operating parametersusing theoretical simulation analysis. Results showed that the new system has significant thermal performance advantages compared to the conventional electric heating hot air drying system. The moisture extraction rate（MER） of designed system is 0.5018kW?h/kg decreased by 16.5%, which is a 16.5% decrease compared to the conventional drying system under the condition of 1.02 kg/h condensation rate. In addition, the drum operating temperature of designed system is 57.68 ℃, another significant decrease from 90 ℃ in the conventional system. Therefore, the designed system can effectively expand the drying range of clothes.

Key words: heat pump, low temperature drying, moisture extraction rate（MER）, energy conservation