Thermodynamic behavior with cost predictions of residential desiccant-cooling systems
Thesis/Dissertation
·
OSTI ID:5258749
Finite-difference methods are used to model a rotating desiccant wheel,and results are used to compile functional relations describing the desiccant-air-moisture behavior. Computer programs are written to simulate cooling cycles and, combined with the desiccant wheel, functional relations to determine an effective practical cycle to be used in a cooling-season simulation for a 1500 ft/sup 2/ house in Houston, Texas. The chosen cycle uses an indirect evaporative cooler, a direct evaporative cooler, and one heat exchanger. A code is also developed to simulate flat-plate solar collectors and thermal rockbed behavior for regeneration of the desiccant wheel. An hour-by-hour, five-month cooling-season simulation is performed using the National Climatic Center weather and solar data tapes for Houston. The simulation results in a cooling-season, thermal coefficient of performance (COP) of 1.73. Comparing this system to a low-efficiency conventional vapor-compressions system, a cost analysis shows that such a system would have a payback of about nine years if used without the solar circuit. If used with a solar circuit that provided significant energy savings, it would probably never pay for itself at current energy costs.
- Research Organization:
- Texas A and M Univ., College Station (USA)
- OSTI ID:
- 5258749
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
140901 -- Solar Thermal Utilization-- Space Heating & Cooling
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
BUILDINGS
COMPUTERIZED SIMULATION
COOLING SYSTEMS
COST ESTIMATION
DESICCANTS
ENERGY CONSERVATION
ENERGY SYSTEMS
EQUIPMENT
FINITE DIFFERENCE METHOD
FLAT PLATE COLLECTORS
ITERATIVE METHODS
NUMERICAL SOLUTION
PAYBACK PERIOD
RESIDENTIAL BUILDINGS
SIMULATION
SOLAR COLLECTORS
SOLAR COOLING SYSTEMS
SOLAR EQUIPMENT
140901 -- Solar Thermal Utilization-- Space Heating & Cooling
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
BUILDINGS
COMPUTERIZED SIMULATION
COOLING SYSTEMS
COST ESTIMATION
DESICCANTS
ENERGY CONSERVATION
ENERGY SYSTEMS
EQUIPMENT
FINITE DIFFERENCE METHOD
FLAT PLATE COLLECTORS
ITERATIVE METHODS
NUMERICAL SOLUTION
PAYBACK PERIOD
RESIDENTIAL BUILDINGS
SIMULATION
SOLAR COLLECTORS
SOLAR COOLING SYSTEMS
SOLAR EQUIPMENT