Using heat of solution of aluminum sulfate to store energy in tankless vacuum-tube solar water heaters

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United States of America Patent

PATENT NO 9890314
SERIAL NO

14551363

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Abstract

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The present invention generally relates to solar water heaters, in particular to solar water heaters using glass vacuum tubes as both solar energy collector and thermal energy storage device, without a hot water storage tank. To improve the efficiency of thermal energy storage, a novel medium for thermal energy storage is disclosed, which utilizes the heat of solution of aluminum sulphate, comprising water and 40% to 47% of Al2(SO4)3. The working temperature range of such energy storage medium is between 50° C. and 100° C. The energy storage medium is contained in plastic capsules, submerged in water and placed in glass vacuum tubes.

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Patent Owner(s)

  • THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Chengjun Julian White Plains, US 24 899

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