多功能热泵干燥装置恒温干燥模式性能研究

Study on the performance of constant temperature drying mode of multifunctional heat pump drying device

为了推广应用热泵干燥技术,设计了一种多功能热泵干燥装置,并搭建了相应的实验台对其恒温干燥模式进行了性能测试。以湿棉布为研究对象,通过控制系统对热泵干燥装置的送风温度和干燥介质旁通率进行调节,在不同运行条件下进行干燥试验。结果表明,热泵干燥系统的单位能耗除湿量(SMER)随干燥温度升高而减小,随旁通率的增大而增大,最大值为2.47kg/(kW·h),而性能系数(COP)呈现相反的规律,最大值为4.24,且不同状态的干燥介质存在不同的最佳旁通率。

In order to promote the application of heat pump drying technology,a multifunctional heat pump drying device with heating was designed.The conventional drying,constant temperature drying,and various operating modes were refrigerated,and the corresponding experimental bench was set up to test the performance of the constant temperature drying mode.The air supply temperature of the heat pump drying device and the bypass rate of the drying medium were adjusted by the control system,and the drying experiment was carried out under different operating conditions to test the effects on the wet cotton cloth.The results showed that the specific moisture extraction rate(SMER)of the heat pump drying system decreased with the increase of the drying temperature,and increased with the increase of the bypass rate.The maximum value was 2.47 kg/(kW·h).The coefficient of performance(COP)exhibited a rule opposite to that of SMER,with the maximum value of 4.24,and the different drying media had different optimal bypass rates.