Multi-Use Geothermal Energy System with Augmentation for Enhanced Utilization. Non-Electric Application of Geothermal Energy in Susanville, California. Second Quarterly Technical Report, April 1-June 30, 1978

摘要

The objectives of this study are to determine the economic and technical feasibility of using the low to moderate temperature geothermal resource in the Susanville anomaly in a district heating/cooling system for public or private users and in a Park of Commerce developed in conjunction with the resources development. The Susanville resource temperature is known to be a minimum of 150 exp 0 F and is projected to be a maximum of 239 exp 0 F. Because these factors all contribute to major capital outlays, design approaches have been studied which will permit economical utilization of the resource regardless of the outcome of the drilling. The system selected will depend on the result of the drilling program. This study presents a data base on systems for the temperature range from 150 to 239 exp 0 F. The results of the engineering and economic study currently indicate the region and conditions for economic feasibility. Based on a predicted fuel inflation rate of 7% and a municipal bond interest rate of 10%, the development of the Susanville Geo-Heating District is economically feasible over the entire range of anticipated reservoir conditions. Under conditions of high well costs ($130 to $175 thousand dollars per well) and low resources temperature (150 to 165 exp 0 F), economic and operational advantages can be shown for the use of heat pumps to augment the resource temperature. (ERA citation 05:015603)