某复叠式制冷机房二氧化碳气体泄漏扩散及事故通风模拟  

Simulation of Leakage and Diffusion of Carbon Dioxide and Accident Ventilation in a Cascade Refrigerator Room

作　　者：甄仌[1] 张雪 孙惠蕾 苏格毅 杨红艳 许莹莹 Zhen Bing;Zhang Xue;Sun Huilei;Su Geyi;Yang Hongyan;Xu Yingying(School of Energy and Civil Engineering,Harbin University of Commerce,Harbin,150028,China)

机构地区：[1]哈尔滨商业大学能源与建筑工程学院,哈尔滨150028

出　　处：《冷藏技术》2021年第3期39-44,35,共7页Journal of Refrigeration Technology

基　　金：黑龙江省自然科学基金联合引导项目(LH2019E069);哈尔滨商业大学博士科研启动金项目(12DL003)。

摘　　要：本文使用CFD软件简化模拟了氨-二氧化碳复叠式制冷机房冷凝蒸发器内二氧化碳进气管道泄漏后二氧化碳的扩散及开启事故风机后的浓度分布。计算结果表明泄漏200 s时机房内大部分区域二氧化碳浓度已经超过15000 ppm。通过对比两种事故风机布置的二氧化碳浓度分布,认为在靠近二氧化碳管道及设备的一侧墙面布置事故风机对保证机房二氧化碳安全浓度较为有利。In this paper, CFD software is used to simulate the leakage and diffusion of carbon dioxide and the concentration distribution after starting the accident fan. The results show that the carbon dioxide concentration in most areas of the refrigeration room has exceeded 15000 ppm at 200 s. By comparing the carbon dioxide concentration distribution of two kinds of accident fans, it is considered that the arrangement of accident fans on the wall near the carbon dioxide pipelines and equipment is more favorable to ensure the safe concentration of carbon dioxide in the machine room.

关 键 词：氨-二氧化碳复叠式制冷系统 制冷机房 泄漏 事故通风 

分 类 号：TB664[一般工业技术—制冷工程]