Research On Heat Pump Drying Device For Heat Sensitive Clothing

Heat pump drying technology has the advantages of low energy consumption,low operating cost,high drying quality,green environmental protection,and wide range of application areas,with the goal of low temperature and low energy consumption drying of thermal clothing,the heat pump technology,dehumidification solution technology,air sweep membrane distillation technology and drying device are integrated,and a new type of heat-sensitive clothing heat pump drying device is constructed,and the device is systematically analyzed and experimentally studied.Four types of heat pump dryers with different structures are proposed,namely heat pump open dryers,heat pump thermal conductive dryers,heat pump closed dryers and membrane distillation regeneration dehumidification solution heat pump dryers;four different heat pump drying devices are comprehensively compared and analyzed,the analysis shows that the membrane distillation regenerative desiccant solution heat pump drying device has better comprehensive advantages compared with other devices.Established the physical model and mathematical model of the membrane distillation regeneration dehumidification solution heat pump clothes drying device,and compiled the device performance simulation software,and the device performance(membrane distillation module membrane flux,membrane distillation module thermal efficiency,clothes temperature,clothes drying rate,heat pump heating capacity,heat pump heating coefficient,dehumidification solution concentration rate and dehumidification energy consumption ratio)are studied with 20 key parameters.The response surface method is used to optimize and analyze the 3 key parameters of the device,and based on different the dehumidification solution concentration rate requirements provide three optimization schemes,which can provide guidance for device design.The membrane distillation regeneration dehumidification solution heat pump drying experiment device was made.The wool-type heat-sensitive wool with a temperature of about 50℃was used as the experiment to dry the clothes.The dehumidification solution was Li Br aqueous solution,and the clothes drying experiment and dehumidification were carried out under normal pressure and low temperature conditions.The solution regeneration experiment research has obtained the performance change law and steady-state performance data of the device during operation.When the flow rate of the purge gas into the membrane distillation module is 4.2g/s,the membrane flux of the membrane distillation module is 0.643kg/(m~2·h),the thermal efficiency of the membrane distillation module is72.12%;the heat pump heating capacity is 272.77W,the heat pump heating coefficient is3.96;the dehumidification solution concentration rate is 0.289 kg/h,the dehumidification energy consumption ratio is 3.43 kg/k Wh,the device has a good energy-saving effect,and based on the experimental results,the improvement direction of the device is proposed,which can provide a reference for the industrialization design and application of the device.