Chemical heat pump and chemical energy storage system
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.
- Assignee:
- Rocket Research Co.
- Patent Number(s):
- US 4532778
- OSTI ID:
- 6349225
- Resource Relation:
- Patent File Date: Filed date 24 May 1981; Other Information: PAT-APPL-247004
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ENERGY STORAGE SYSTEMS
CHEMICAL HEAT PUMPS
DESIGN
HEAT SOURCES
THERMAL ENERGY STORAGE EQUIPMENT
AQUEOUS SOLUTIONS
CONDENSERS
ELECTRIC GENERATORS
EVAPORATORS
HEAT RECOVERY
SOLAR COLLECTORS
SULFURIC ACID
THERMODYNAMIC PROPERTIES
WATER
DISPERSIONS
ENERGY RECOVERY
ENERGY SYSTEMS
EQUIPMENT
HEAT PUMPS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MIXTURES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RECOVERY
SOLAR EQUIPMENT
SOLUTIONS
250800* - Energy Storage- Chemical