当前位置: X-MOL 学术Int. J. Refrig. › 论文详情
Integrated CO2 system with HVAC and hot water for hotels: Field measurements and performance evaluation
International Journal of Refrigeration ( IF 3.461 ) Pub Date : 2020-04-08 , DOI: 10.1016/j.ijrefrig.2020.03.021
S. Smitt; I. Tolstorebrov; A. Hafner

This study investigates the performance of an integrated CO2 (R744) heat pump and chiller unit in a Norwegian hotel. The system consists of a single unit for heating, cooling and hot water with an integrated thermal storage. The thermal system of the hotel is described and data from the first year of operation are analyzed. Using the field measurements, hot water loads and COPs are calculated and averaged to 20-minute intervals. The heating and cooling capacities supplied by the R744 unit are studied on a weekly and monthly basis to evaluate the seasonal behavior of the system. The hot water storage holds an energy capacity of 350 kWh at fully charged conditions and demonstrates peak demand reductions of more than 100 kW during a 2-day period. The results show that the hot water usage accounts for 52% of the annual heat load of the hotel. Energy efficiency analysis of the integrated R744 system reveals an annual system SCOP of 2.90, and thus an untapped system potential that can be exploited by increasing the AC load delivered by the R744 unit. Other factors that greatly influence the efficiency of the system are variations in the ambient temperature and high gas cooler exit temperatures. The latter is often a result of high temperatures in the water returning from the subsystems of the hotel. This can be improved by reducing the number of starts and stops of the R744 unit and by insuring stratification in hot water tanks.

更新日期:2020-04-08

 

全部期刊列表>>
欢迎访问IOP中国网站
自然职场线上招聘会
GIANT
产业、创新与基础设施
自然科研线上培训服务
材料学研究精选
胸腔和胸部成像专题
屿渡论文,编辑服务
何川
苏昭铭
陈刚
姜涛
李闯创
李刚
北大
隐藏1h前已浏览文章
课题组网站
新版X-MOL期刊搜索和高级搜索功能介绍
ACS材料视界
天合科研
x-mol收录
上海纽约大学
陈芬儿
厦门大学
何振宇
史大永
吉林大学
卓春祥
张昊
杨中悦
试剂库存
down
wechat
bug