制冷学报2024，Vol.45Issue(4)：93-103,11.DOI:10.3969/j.issn.0253-4339.2024.04.093
离心式Co2逆布雷顿制冷系统的㶲分析研究
Exergy Analysis of CO2 Centrifugal Reverse Brayton Cycle
周娇乐 1李昊 1王厉1
作者信息
- 1. 浙江理工大学建筑工程学院 杭州 310018
- 折叠
摘要
Abstract
The centrifugal reverse Brayton cycle(CRBC)is a novel refrigeration cycle that harnesses the conversion of inertial potential energy to pressure energy,enabling efficient compression and expansion processes through centrifugal and centripetal flows of the working fluid within a rotating tube.This offers a promising potential for improving the refrigeration efficiency of conventional gas refrigeration cycles.Building on previous studies,this study employs a thermodynamic model to conduct a parametric analysis of the CRBC to explore the thermodynamic efficiency and loss distributions of the cycle,providing a theoretical foundation for system evaluation and enhancement.Results show that,under the same inlet air temperature,an optimization possibility exists for the heater inlet temperature.The system experiences substantial exergetic losses during the centrifugal isothermal compression flow,adiabatic compression,and centripetal adiabatic expansion flow,each at approximately 20％.Conversely,the exergetic losses during the air-cooling process and the centrifugal adiabatic compression process are comparatively low and demonstrate an inverse relationship with the inlet temperature of the gas heater.The exergetic efficiency of the CRBC reaches 19.2％,which significantly surpasses the values of 8.1％for the CO2 reverse Brayton cycle,4.9％for the open-air reverse Brayton cycle,and 2.3％for the closed-air reverse Brayton cycle.关键词
逆布雷顿循环/CO2制冷循环/超重力场/㶲分析Key words
reverse Brayton cycle/CO2 refrigeration cycle/super-gravity field/exergy analysis分类
通用工业技术引用本文复制引用
周娇乐,李昊,王厉..离心式Co2逆布雷顿制冷系统的㶲分析研究[J].制冷学报,2024,45(4):93-103,11.
