分体式空调室外机排热对周围环境的影响  

Effect of heat rejection from the outdoor unit of a split-type air-conditioner on surrounding environment

作　　者：卢苇[1] 郑立星 廖宇航[2] 潘洌[2] 陈洪杰[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西大学土木建筑工程学院,广西南宁530004

出　　处：《环境污染与防治》2013年第1期45-49,共5页Environmental Pollution & Control

基　　金：广西自然科学基金资助项目(桂科青0991007);广西研究生教育创新计划项目(No.GXU11T32540)

摘　　要：利用FLUENT软件研究了在有、无自然风情形下空调室外机射流排热的温度场、速度场随室内、环境温度变化的规律,并通过空调室外机卷吸的空气流量计算疏散空调排热所消耗的自然资源量(以能值表示)。结果表明:(1)在有、无自然风情形下,环境温度变化对空调室外机排热的温度场影响显著。(2)在距射流出口前3m处风速分布一致,之后则有所不同,但整体而言有自然风情形下风速分布较无自然风时衰减更快。(3)室内和环境温度都较高时空调室外机卷吸的空气流量较大,距射流出口3m之后温度每变化1℃时卷吸空气流量基本相同。(4)在室内和环境温度不变时,有自然风时较无自然风时卷吸的空气流量小,无自然风情形下疏散空调排热所消耗的自然资源量是有自然风情形下的1.1倍以上。The FULENT software was employed for simulation the waste heat rejection jet from outdoor unit of air conditioner. The temperature field and velocity field of waste heat rejection jet at different indoor and ambient tempera-tures was simulated under windy and windless conditions, in addition the energy consumed for evacuating waste heat from outdoor unit was calculated through the entrainment discharge. Results revealed that ambient temperature had significant effect on temperature field of heat rejection jet both under windy and windless conditions. The jet velocity distribution un-der natural wind and windless conditions was similar in first 3 m away from jet outlet; jet velocity decays faster in natural wind than in windless condition overall. The entrainment discharge was relatively large at higher indoor and ambient tem-peratures; it was almost the same corresponding to 1 ℃ change after 3 m away from jet outlet. At constant indoor and ambient temperature,entrainment discharge in windy condition were smaller than those without wind, and the energy consume of air conditioner in windless condition was 1.1 times of that in windy condition.

关 键 词：分体式空调 废热排放 射流 模拟仿真 

分 类 号：X820.3[环境科学与工程—环境工程]