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http://dx.doi.org/10.6110/KJACR.2012.24.4.336

Enhancement of Stratification for Solar Water Storage Tank with Spiral Jacket and Coil(Part 1：Verification Experiment)  

Kwon, Jae-Wook (Graduate School, Department of Mechanical Engineering, Kyung Hee University)
Hong, Hi-Ki (Department of Mechanical Engineering, Kyung Hee University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.24, no.4, 2012 , pp. 336-342 More about this Journal
Abstract
Large-scale active solar heat systems are generally using heat exchanger between collector and storage tank loops to prevent damage by freezing. It is difficult to maintain stratification in a storage tank in the system owing to greater flow rate enhancing heat transfer. In the previous study, we introduced a spiral-jacketed storage tank and obtained good results to keep system performance of general level without better stratification. We added a scroll-shaped heat exchanger coil on the upper part in the spiral-jacketed storage tank. As a result of the experiment, it was verified that degree of stratification of the new type storage tank is higher than that of the previous one with a possibility of better collector efficiency and solar fraction.
Keywords
Active solar heat system; Spiral-jacketed storage tank; Stratification; Collector efficiency;
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