Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
Determination criterion of defrosting condition for variable refrigerant flow air conditioning system | |
Tu, Qiu1,3![]() | |
2012-05-01 | |
Source Publication | ENERGY AND BUILDINGS
![]() |
Volume | 48Pages:61-70 |
Abstract | The disadvantage of the defrosting determination criterion of time-coil temperature was theoretically analyzed and experimentally verified. Considering the different characteristics of variable refrigerant flow air conditioning system (VRF AC) from the common air conditioners, the defrosting criterion model of time-coil temperature-condensation temperature has been built. In this model, there exist four temperature regions based on different frosting characteristics at different ambient temperatures, i.e., T-ao(degrees C) is an element of (-infinity, -9], (-9, 0], (0, 4], (4, 21]. The relations between the defrosting judgment temperatures and ambient temperatures have been determined by experiments. And the minimum defrosting cycle when T-ao(degrees C) is an element of (-9, 21] and T-ao(degrees C) is an element of (-infinity, -9] were respectively determined to be 60 min and 90 min by experiments. Moreover, the defrosting accumulative coefficient, the defrosting judgment time constant and the restriction of the condensation temperature have been introduced into the model. Thus the complete criterion model can avoid delayed and premature defrosting, even false defrosting and inaccessible defrosting. A large number of experiments have verified the feasibility of the model. (C) 2012 Elsevier B.V. All rights reserved. |
Subtype | Article |
Keyword | Defrosting Defrosting Condition Condensation Temperature Defrosting Cycle Coil Temperature |
WOS Headings | Science & Technology ; Technology |
DOI | 10.1016/j.enbuild.2012.01.012 |
WOS Subject Extended | Construction & Building Technology ; Energy & Fuels ; Engineering |
WOS Keyword | SOURCE HEAT-PUMP ; REVERSE-CYCLE DEFROST ; PERFORMANCE |
Indexed By | SCI |
Language | 英语 |
WOS Subject | Construction & Building Technology ; Energy & Fuels ; Engineering, Civil |
WOS ID | WOS:000302669300007 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.giec.ac.cn/handle/344007/10189 |
Collection | 中国科学院广州能源研究所 |
Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.Haier Air Conditioning Elect Co LTD, Qingdao 266510, Peoples R China 3.Chinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China |
First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
Recommended Citation GB/T 7714 | Tu, Qiu,Xu, Jingqiang,Feng, Yuhai,et al. Determination criterion of defrosting condition for variable refrigerant flow air conditioning system[J]. ENERGY AND BUILDINGS,2012,48:61-70. |
APA | Tu, Qiu,Xu, Jingqiang,Feng, Yuhai,Mao, Shoubo,Guo, Defang,&He, Jianqi.(2012).Determination criterion of defrosting condition for variable refrigerant flow air conditioning system.ENERGY AND BUILDINGS,48,61-70. |
MLA | Tu, Qiu,et al."Determination criterion of defrosting condition for variable refrigerant flow air conditioning system".ENERGY AND BUILDINGS 48(2012):61-70. |
Files in This Item: | Download All | |||||
File Name/Size | DocType | Version | Access | License | ||
Determination criter(2912KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment