新型除湿烘干一体机设计及能效分析

Design of new dehumidification and drying unit and energy efficiency analysis

针对沿海及南方地区室内空气除湿及衣物烘干的市场需求,将冷冻除湿与热泵烘干技术相结合,设计一种能够提供不同出风温度的除湿烘干一体机,主要采用可回收干燥空气能量的回热器以及由半导体制冷片组成的第二蒸发器这2项节能技术。通过空气流程以及制冷剂循环数学模型的建立与求解,对所设计的除湿烘干一体机的除湿及烘干性能进行计算分析。结果表明:在空气进口温度/相对湿度为24.8℃/76.00%,除湿模式(出风温度/相对湿度34.9℃/35.05%)和烘干模式(出风温度/相对湿度50.0℃/14.50%)的条件下,除湿模式的比能耗为1176kJ/kg,制冷系数为3.16;烘干模式的制热系数为2.05,除湿能效比为2.49,具有进一步研发试验的价值。

Aiming at the market demand of indoor air dehumidification and clothing drying in coastal and southern areas, a new type of dehumidification and drying unit which can supply different air outlet temperatures is designed by combining freezing dehumidification and heat pump drying technology. It mainly adopts two energy-saving technologies, the regenerator which can recover the energy of dry air and the second evaporator which is composed of semiconductor refrigerating sheet. Through the establishment and solution of the mathematical model of air flow and refrigerant circulation, the dehumidification and drying performance of the designed dehumidification and drying unit is calculated and analyzed. The results show that under the conditions of inlet air temperature/relative humidity of 24.8 ℃/76.00%, dehumidification modes(outlet air temperature/relative humidity of 34.9 ℃/35.05%) and drying modes(outlet air temperature/relative humidity of 50.0 ℃/14.50%), the unit energy consumption of the dehumidification mode is 1 176 kJ/kg, and the refrigeration coefficient is 3.16,the heating coefficient of the drying mode is 2.05 and the energy efficiency ratio of dehumidification is 2.49, which has the value of further research and development.