A HOT WATER HEATED WITH INTEGRATED THERMAL ENERGY STORAGE USING COMPLEX COMPOUNDS

Award Information
Agency: Department of Energy
Branch: N/A
Contract: N/A
Agency Tracking Number: 14437
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1991
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Rocky Research
Po Box 1086, Boulder City, NV, 89005
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr. William P. Graebel
 Principal Investigator
 () -
Business Contact
Phone: (702) 293-0851
Research Institution
N/A
Abstract
THERMAL ENERGY STORAGE IS USEFUL IN SHIFTING ELECTRICAL LOADFROM PERIODS OF PEAK POWER TO OFF-PEAK PERIODS. THERMAL ENERGY STORAGE SYSTEMS USING COMPLEX COMPOUNDS HAVE HIGHER STORAGE DENSITIES (BOTH MASS AND VOLUMETRIC DENSITY) THAN CONVENTIONAL SYSTEMS. IN THIS PROJECT, A THERMAL ENERGY STORAGE CONCEPT IS ADVANCED TO HEAT WATER FOR DOMESTIC AND COMMERCIAL APPLICATIONS. SEVERAL METHODS EXIST FOR USING COMPLEX COMPOUNDS AS HEAT STORAGE MEDIA. TWO OF THE MOST PROMISING METHODS ARE BEING INVESTIGATED AND COMPARED IN THIS PHASE I EFFORT. THE FIRST METHOD USES TWO COMPLEX COMPOUNDS WITH SIGNIFICANTLY DIFFERENT SORPTION ENERGIES AS LATENT PASSIVE STORAGE. THE SECOND METHOD FUNCTIONS AS A HEAT-ACTIVATED HEAT PUMP WITH CYCLE TIME DURATION BEING EQUAL TO THE STORAGE WINDOW, THUS PROVIDING LATENT HEAT STORAGE IN AN ACTIVE MODE. THE CHARGING OF COMPLEX COMPOUNDS TAKES PLACE DURING OFF-PEAK HOURS BY DESORBING AMMONIA. DURING ON-PEAK HOURS, AMMONIA IS ABSORBED TO PROVIDE HEAT FOR HEATING WATER. THE PURPOSE OF THIS PROJECTIS TO DEMONSTRATE THE FEASIBILITY OF WATER HEATING SYSTEMS USING COMPLEX COMPOUNDS. EVALUATION CRITERIA WILL BE (1) PROOF-OF-PRINCIPLE EXPERIMENTS AND (2) ECONOMIC ANALYSIS, WHERE COST AND PAYBACK PERIODS ARE ESTIMATED AND COMPARED WITH OTHER EXISTING TECHNOLOGIES.

* information listed above is at the time of submission.

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