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Title: Design and economics of direct-contact salt hydrate storage systems

A salt-hydrate latent heat storage system is described in which oil is injected at the bottom of the container and exchanges heat as it floats to the top where it is pumped back to the heat source. Experiments are described which are meant to solve two problems. The first problem is to reliably inject the oil into the salt phase. The second is to minimize the carryover of salt hydrate into the oil, which can be done using two-stage coalescer-filters. Three systems are described and compared: a standard liquid-based sensible heat storage system, a latent heat storage design where oil is the heat-transfer fluid throughout the system, and a latent heat storage system where ethylene glycol/water is used in the collectors and oil in the storage tank. Direct-contact latent heat systems have overall costs roughly equal to those for water thermal storage tanks. The primary advantage of latent heat storage is its substantially smaller volume requirement. (LEW)
Authors:
Publication Date:
OSTI Identifier:
6172130
Report Number(s):
SERI/TP-631-1163; CONF-811007-3
DOE Contract Number:
AC02-77CH00178
Resource Type:
Conference
Resource Relation:
Conference: 2. world congress of chemical engineering, Montreal, Canada, 4 Oct 1981
Research Org:
Solar Energy Research Inst., Golden, CO (USA)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; DIRECT CONTACT HEAT EXCHANGERS; DESIGN; ECONOMIC ANALYSIS; LATENT HEAT STORAGE; ANTIFREEZE; COMPARATIVE EVALUATIONS; COST; GLYCOLS; HEAT TRANSFER FLUIDS; MOLTEN SALTS; OILS; ALCOHOLS; ECONOMICS; ENERGY STORAGE; FLUIDS; HEAT EXCHANGERS; HEAT STORAGE; HYDROXY COMPOUNDS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; SALTS; STORAGE 142000* -- Solar Energy-- Heat Storage-- (1980-)