热泵印染自热回收系统设计与研究  

Design and research of printing and dyeing self-heat recovery system with heat pump

作　　者：魏义丹 韦文斌 沈九兵 Wei Yidan;Wei Wenbin;Shen Jiubing(School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212100,China)

机构地区：[1]江苏科技大学能源与动力学院,镇江212100

出　　处：《低温与超导》2024年第6期90-95,102,共7页Cryogenics and Superconductivity

基　　金：国家自然科学基金(52006092)资助。

摘　　要：针对印染工艺高用热需求及废水池自然冷却的热损失问题,基于R245fa的高温热泵,提出一种印染自热回收系统,回收80~90℃印染废水余热,输出105℃的高温热水供回染机使用,减少印染工艺供热能耗。通过系统热力学模型的建立与求解,分析了热泵运行工况对系统热回收及热反哺性能的影响规律。结果表明:废水温度越高、蒸发温度越高,热泵系统COP越大,研究工况下能达4.04;系统热回收量和热水供应量会随着蒸发温度的降低、废水温度的升高而增大,废水温度90℃、热泵蒸发温度55℃时,系统回收1 t/h废水热量,可制得1.7 t/h的105℃高温热水,相应的减少0.077 5 t/h的蒸汽消耗。To address the high thermal demand of dyeing processes and the heat loss during natural cooling of wastewater pools,a dyeing self-heat recovery system was proposed based on a high-temperature heat pump using R245fa.This system recovered waste heat from dyeing wastewater at 80-90 ℃ and delivered high-temperature hot water at 105 ℃ for reuse in dyeing machines,thereby reducing the thermal energy consumption of the dyeing process.By establishing and solving the thermodynamic model of the system,the impact of heat pump operating conditions on the performance of heat recovery and thermal feedback were analyzed.The results indicate that higher wastewater temperatures and higher evaporation temperatures lead to a greater coefficient of performance(COP) for the heat pump system,reaching up to 4.04 under the studied conditions.The amount of heat recovery and hot water supply increases with the rise in wastewater temperature and the decrease in evaporation temperature.Specifically,when the wastewater temperature is 90 ℃ and the heat pump evaporation temperature is 55 ℃,the system can recover heat from wastewater at a rate of 1 t/h,producing 1.7 t/h of 105 ℃ hot water,which corresponds to a reduction in steam consumption by 0.077 5 t/h.

关 键 词：热泵 自热回收 蒸发温度 印染 

分 类 号：TB611[一般工业技术—制冷工程] P7471[天文地球—海洋科学]