基于焓[火积]耗散数的绝热型溶液除湿/再生器性能预测解析模型  

An analytical model for predicting the performance of adiabatic dehumidifier/regenerator based on enthalpy entransy dissipation numbers

作　　者：彭冬根[1] 曹卓 PENG Dong-gen;CAO Zhuo(School of Infrastructure Engineering,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学工程建设学院,江西南昌330031

出　　处：《高校化学工程学报》2022年第4期543-553,共11页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(51766010);江西省研究生创新专项资金(YC2019-S002);南昌市高效制冷知识创新团队(2018-CXTD-004)。

摘　　要：为了探究溶液除湿/再生过程热质耦合传递的不可逆性,提出焓[火积]E_(h)概念,导出焓[火积]耗散数E_(h)^(*),研究E_(h)^(*)和等效热容比C^(*)、焓效率εh及传热单元数(NTU)的变化关系,同时建立基于E_(h)^(*)的顺/逆流除湿/再生器性能预测解析模型,分析E_(h)^(*)对装置性能的影响。结果表明,E_(h)^(*)与εh近似呈负线性关系,且随C^(*)减小而逐渐增大,随NTU变大逐渐减少趋于稳定;当E_(h)^(*)较小时,除湿/再生程度更深,而当E_(h)^(*)趋近于1时,除湿/再生的热质传递趋于停止;在相同E_(h)^(*)下,溶液进口温度和流量比对装置性能影响更大。In order to study the irreversibility of coupled heat and mass transfer processes of parallel/counter flow solution dehumidification/regeneration,a concept of enthalpy entransy E_(h) was proposed,and the enthalpy entransy dissipation number E_(h)^(*)of solution dehumidification/regeneration was deduced.Its relationship with the equivalent heat capacity ratio C^(*),the number of heat transfer unit(NTU)and the enthalpy efficiency εh were obtained,respectively.Moreover,an analytical model of dehumidifier/regenerator based on E_(h)^(*)was established,and the effect of the enthalpy entransy dissipation number E_(h)^(*)on the performance of dehumidifier/regenerator was analyzed.The results show that the E_(h)^(*)shows negative linearity relationship with the εh,and it increases with the decrease of C^(*)and decreases to a stable value with the increase of NTU.The degree of heat and mass transfer processes taking place between the solution and air is deeper when E_(h)^(*)is smaller,while their processes tend to stop when E_(h)^(*)approaches 1.0.At constant E_(h)^(*),the solution inlet temperature and the flow-rate ratio have more significant effects on the performance of the device.

关 键 词：除湿/再生 焓[火积] 解析模型 不可逆性 传热传质 

分 类 号：TU834.9[建筑科学—供热、供燃气、通风及空调工程]