The Influence of Return Loop Flow Rate on Stratification in a Vertical Hot Water Storage Tank Connected to a Heat Pump Water Heater
作者:
J. P. Meyer, P. J. A. Raubenheimer, E. Kruger,
期刊:
Heat Transfer Engineering
(Taylor Available online 2000)
卷期:
Volume 21,
issue 2
页码: 67-73
ISSN:0145-7632
年代: 2000
DOI:10.1080/014576300271040
出版商: Informa UK Ltd
数据来源: Taylor
摘要:
A temperature-controlled hot water heat pump was simulated using heating in a vertical, domestic hot water storage tank. The influence of the return loop flow rate on stratification was investigated experimentally. The return loop is the water line that supplies a long line of consumers with hot water, and returns colder water to the middle of the hot water storage tank. The return temperature is a function of the length of the loop, insulation, and ambient conditions. Temperatures were measured as a function of time at different vertical locations on the centerline of the storage tank. The temperature distributions in the tank were compared for different return flow rates. A return flow rate of three tank volumes per day was identified as preferable, although good results were also obtained for less than three tank volumes per day.
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