Performance Study of Storage-type Domestic Electrical Water-Heaters with Wedged Inlet: Unsteady Water Discharge Rate

被引：0
|
作者：
Zhang, Zhijun [1 ]
Zhang, Shiwei [1 ]
Xu, Chenghai [1 ]
机构：
[1] Northeastern Univ, Sch Mech Engn & Automat, Shenyang 110004, Peoples R China
来源：
FRONTIERS OF MANUFACTURING AND DESIGN SCIENCE, PTS 1-4 | 2011年 / 44-47卷
关键词：
Electric Water heater; utility efficiency; unsteady discharge rate; CFD; simulation; HOT-WATER; DESIGN;
D O I：
10.4028/www.scientific.net/AMM.44-47.299
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The unsteady water discharge rate on performance of storage-type domestic electrical water-heaters with wedged inlet was studied by computer fluid dynamics simulation (CFD). The results were compared with those of conventional design EWHs having the same tank size. The heater performance is characterized the discharge efficiency, extraction efficiency and fraction of heat recoverable. The water draw-off temperature profile of steady and unsteady water discharge rate has nothing difference for wedged inlet structure, both curve was overlapped. The almost the same energy utility efficiency was gotten both steady and unsteady discharge rate for wedged inlet structure. The obviously difference of water draw-off temperature profile was shown for conventional inlet structure. Water draw-off temperature profile of unsteady discharge rate was decreased faster than steady discharge rate. The energy utility efficiency of unsteady discharge rate was also lower than steady discharge rate. The results were shown that the wedged inlet structure heater has excellent performance for energy utility efficiency under unsteady discharge rate.
引用
收藏
页码：299 / 303
页数：5
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