Maryvale Terrace: geothermal residential district space heating and cooling
A preliminary study of the technical and economic feasibility of installing a geothermal district heating and cooling system is analyzed for the Maryvale Terrace residential subdevelopment in Phoenix, Arizona, consisting of 557 residential houses. The design heating load was estimated to be 16.77 million Btu/h and the design cooling load was estimated to be 14.65 million Btu/h. Average annual energy use for the development was estimated to be 5870 million Btu/y and 14,650 million Btu/y for heating and cooling, respectively. Competing fuels are natural gas for heating and electricity for cooling. A geothermal resource is assumed to exist beneath the site at a depth of 6000 feet. Five production wells producing 1000 gpm each of 220/sup 0/F geothermal fluid are required. Total estimated cost for installing the system is $5,079,300. First year system operations cost (including debt service) is $974,361. The average annual geothermal heating and cooling cost per home is estimated to be $1750 as compared to a conventional system annual cost of $1145. Further, the cost of geothermal heating and cooling is estimated to be $47.50 per million Btu when debt service is included and $6.14 per million Btu when only operating costs are included. Operating (or fuel) costs for conventional heating and cooling are estimated to be $15.55 per million Btu.
- Research Organization:
- Arizona Univ., Tucson (USA). Dept. of Chemical Engineering
- DOE Contract Number:
- FC03-80RA50076
- OSTI ID:
- 6588899
- Report Number(s):
- DOE/RA/50076-15; ON: DE83005288
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GEOTHERMAL DISTRICT HEATING
ECONOMIC ANALYSIS
FEASIBILITY STUDIES
GEOTHERMAL HEATING SYSTEMS
ARIZONA
GEOTHERMAL AIR CONDITIONING
GEOTHERMAL RESOURCES
GEOTHERMAL SPACE HEATING
HOUSES
RESIDENTIAL SECTOR
AIR CONDITIONING
BUILDINGS
DISTRICT HEATING
ECONOMICS
ENERGY SYSTEMS
FEDERAL REGION IX
GEOTHERMAL HEATING
HEATING
HEATING SYSTEMS
NORTH AMERICA
RESIDENTIAL BUILDINGS
RESOURCES
SPACE HEATING
USA
Geothermal Legacy
151000* - Geothermal Energy- Direct Energy Utilization