摘要
以使用R134a为工质的空气源热泵为基础,耦合真空泵、板翅式换热器搭建了一套蒸发浓缩系统,在不需要新鲜蒸汽输入的情况下,能将物料产生的蒸汽回收利用再次加热原料,不仅降低了能耗,而且提高了系统的制热性能。在保持其他实验变量不变的条件下,探究了不同真空度以及不同环境温度对系统性能的影响。结果表明,随着真空度的提高,系统的蒸发温度降低,压缩机的功耗减少,系统的制热量明显提高。在蒸发罐真空度为0.07 MPa下,热泵系统的能效比(COP)可以达到6.0,系统蒸发速率为22 kg/h;随着环境温度的升高,系统的制热量、蒸发速率及COP均增加,制热量由0℃时的9.7 kW上升至20℃时的17.7 kW,增加了83%,在20℃环境温度中,热泵COP达到5.38,系统蒸发速率达17.71 kg/h。
An evaporation-concentration system is built based on an air source heat pump with R134 a as the working fluid,coupled with a vacuum pump and a plate-fin heat exchanger.Without the need for fresh steam input,the steam generated by the material can be recycled and reutilized,which reduces energy consumption and improves the heating performance of the system.Under the condition of keeping other experimental variables unchanged,the influences of the vacuum degree of the system and the environmental temperature on the performance of the system are explored.Experimental results show that as the vacuum degree increases,the evaporation temperature of the system decreases,the power consumption of the compressor drops,and the effective heating capacity of the system is significantly increased.Under a vacuum degree of 0.07 MPa in the evaporator,and the energy efficiency ratio(COP)of heat pump system reaches 6.0,and the system evaporation rate reaches 22 kg·h^(-1).With the increasing ambient temperature,the heating capacity,evaporation rate and COP of the system all increase.The heating capacity increases from 9.7 kW in an ambient temperature of 0℃to 17.7 kW in an ambient temperature of 20℃,an increase of 83%.At an ambient temperature of 20℃,COP reaches 5.38,and the evaporation rate is 17.71 kg·h^(-1).
作者
杨钤
靳玮
苏庆宗
熊鑫
王亚雄
YANG Qian;JIN Wei;SU Qing-zong;XIONG Xin;WANG Ya-xiong(School of Chemistry and Chemical Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,China;School of Mechanical Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,China;Inner Mongolia BriTech Co.,Ltd.,Baotou 014030,China;Key Laboratory of Coal Chemical and Coal Comprehensive Utilization,Inner Mongolia Autonomous Region,Baotou 014010,China)
出处
《现代化工》
CAS
CSCD
北大核心
2022年第S02期359-364,369,共7页
Modern Chemical Industry
基金
鄂尔多斯科技重大专项(2019ZD065)
内蒙古自治区关键技术攻关计划项目(2021GG0043)
关键词
空气源热泵
低温蒸发
蒸发速率
余热回收
air source heat pump
low temperature evaporation
evaporation rate
spent heat recovery
作者简介
通讯联系人:杨钤(1997-),男,硕士生;王亚雄(1964-),男,博士,博导,教授,研究方向为热管、热泵、储热、强化传热等,149416922@qq.com。
