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Title: Chemical heat pump and chemical energy storage system

Abstract

A chemical heat pump and storage system employs sulfuric acid and water. In one form, the system includes a generator and condenser, an evaporator and absorber, aqueous acid solution storage and water storage. During a charging cycle, heat is provided to the generator from a heat source to concentrate the acid solution while heat is removed from the condenser to condense the water vapor produced in the generator. Water is then stored in the storage tank. Heat is thus stored in the form of chemical energy in the concentrated acid. The heat removed from the water vapor can be supplied to a heat load of proper temperature or can be rejected. During a discharge cycle, water in the evaporator is supplied with heat to generate water vapor, which is transmitted to the absorber where it is condensed and absorbed into the concentrated acid. Both heats of dilution and condensation of water are removed from the thus diluted acid. During the discharge cycle the system functions as a heat pump in which heat is added to the system at a low temperature and removed from the system at a high temperature. The diluted acid is stored in an acid storage tankmore » or is routed directly to the generator for reconcentration. The generator, condenser, evaporator, and absorber all are operated under pressure conditions specified by the desired temperature levels for a given application. The storage tanks, however, can be maintained at or near ambient pressure conditions. In another form, the heat pump system is employed to provide usable heat from waste process heat by upgrading the temperature of the waste heat.« less

Inventors:
 [1];  [2]
  1. Woodinville, WA
  2. Bothell, WA
Publication Date:
OSTI Identifier:
865542
Patent Number(s):
US 4532778
Application Number:
06/247,004
Assignee:
Rocket Research Company (Redmond, WA)
DOE Contract Number:  
EY-76-C-03-1185
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
chemical; heat; pump; energy; storage; employs; sulfuric; acid; water; form; generator; condenser; evaporator; absorber; aqueous; solution; charging; cycle; provided; source; concentrate; removed; condense; vapor; produced; stored; tank; concentrated; supplied; load; proper; temperature; rejected; discharge; generate; transmitted; condensed; absorbed; heats; dilution; condensation; diluted; functions; added; routed; directly; reconcentration; operated; pressure; conditions; specified; desired; levels; application; tanks; maintained; near; ambient; employed; provide; usable; waste; process; upgrading; storage tanks; aqueous acid; heat load; temperature levels; pressure conditions; chemical energy; waste heat; chemical heat; water storage; storage tank; acid solution; water vapor; heat pump; energy storage; heat source; sulfuric acid; ambient pressure; desired temperature; proper temperature; near ambient; vapor produced; charge cycle; discharge cycle; concentrated acid; waste process; acid storage; /62/126/237/

Citation Formats

Clark, Edward C, and Huxtable, Douglas D. Chemical heat pump and chemical energy storage system. United States: N. p., 1985. Web.
Clark, Edward C, & Huxtable, Douglas D. Chemical heat pump and chemical energy storage system. United States.
Clark, Edward C, and Huxtable, Douglas D. Tue . "Chemical heat pump and chemical energy storage system". United States. https://www.osti.gov/servlets/purl/865542.
@article{osti_865542,
title = {Chemical heat pump and chemical energy storage system},
author = {Clark, Edward C and Huxtable, Douglas D},
abstractNote = {A chemical heat pump and storage system employs sulfuric acid and water. In one form, the system includes a generator and condenser, an evaporator and absorber, aqueous acid solution storage and water storage. During a charging cycle, heat is provided to the generator from a heat source to concentrate the acid solution while heat is removed from the condenser to condense the water vapor produced in the generator. Water is then stored in the storage tank. Heat is thus stored in the form of chemical energy in the concentrated acid. The heat removed from the water vapor can be supplied to a heat load of proper temperature or can be rejected. During a discharge cycle, water in the evaporator is supplied with heat to generate water vapor, which is transmitted to the absorber where it is condensed and absorbed into the concentrated acid. Both heats of dilution and condensation of water are removed from the thus diluted acid. During the discharge cycle the system functions as a heat pump in which heat is added to the system at a low temperature and removed from the system at a high temperature. The diluted acid is stored in an acid storage tank or is routed directly to the generator for reconcentration. The generator, condenser, evaporator, and absorber all are operated under pressure conditions specified by the desired temperature levels for a given application. The storage tanks, however, can be maintained at or near ambient pressure conditions. In another form, the heat pump system is employed to provide usable heat from waste process heat by upgrading the temperature of the waste heat.},
doi = {},
url = {https://www.osti.gov/biblio/865542}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {8}
}

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