高校化学工程学报2017，Vol.31Issue(1)：43-50,8.DOI:10.3969/j.issn.1003-9015.2016.00.040
基于传热和压降耦合的混合工质冷凝器结构优化
Structural Optimization of Condensers with Refrigerant Blends Based on Heat Transfer and Pressure Drop Coupling
摘要
Abstract
A tube length optimization model based on minimum entropy production was proposed for R744/R290(20/80) and R125/R290(25/75) counter-flow condensers considering coupling of heat transfer and pressure drop. The concept of performance potential evaluation index(PEI) and Total Temperature Penalization(TTP) for mixed refrigerant condensation proposed by Cavallini was used, and the relationship between PEI and heat transfer coefficient was obtained. The effects of condensing temperature, tube diameter and passive pressure drop on optimal tube length were analyzed. The results indicate that the saturation temperature drop value of refrigerants is 0.6 times of that of heat transfer temperature difference between refrigerant and wall. The higher pressure refrigerant (lower critical temperature) R744/R290 (20/80) has lower PEI value and better performance than others, and smaller tube diameter condenser has shorter optimal tube length. The optimal tube length increases with the increase of condensing temperature, while it decreases with the increase of pressure drop.关键词
传热/压降/R744/R290/R125/R290/温度惩罚因子/最优管长Key words
heat transfer/pressure drop/R744/R290/R125/R290/TTP(total temperature penalization)/optimal tube length分类
通用工业技术引用本文复制引用
王方,张仙平,范晓伟,连之伟,徐菂,付一珂..基于传热和压降耦合的混合工质冷凝器结构优化[J].高校化学工程学报,2017,31(1):43-50,8.基金项目
国家自然科学基金(U1504501) （U1504501）
河南省高校青年骨干教师项目(2014GGJS-089) （2014GGJS-089）
河南省高校重点科研项目(15A560014) （15A560014）
高端外国专家项目(GDW20164100039). （GDW20164100039）
