Chemical heat pump and chemical energy storage system
- Woodinville, WA
- Bothell, WA
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.
- DOE Contract Number:
- EY-76-C-03-1185
- Assignee:
- Rocket Research Company (Redmond, WA)
- Patent Number(s):
- US 4532778
- Application Number:
- 06/247,004
- OSTI ID:
- 865542
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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
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