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 MIL-HDBK-1003/13A
solar storage (tempering) tank ahead of conventional
fueled or electric service water heater.]
Latent storage materials are often expensive when compared to rock. In
addition, they must be packaged in individual containers to allow adequate
heat transfer area. Many latent heat materials cannot withstand frequent
recycling and must be replaced periodically. Research is being done by NCEL
and others to develop practical latent heat materials which can withstand
extended recycling. NCEL is investigating a dissolved salt storage unit that
uses immiscible liquids for the heat exchange surface which greatly reduces
the problem of crystallization during recycling. Initial tests have been
encouraging.
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