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Direct Heat

Abstract

Potential resources and applications of earth heat in the form of geothermal energy are large. United States direct uses amount to 2,100 MWt thermal and worldwide 8,850 MWt above a reference temperature of 35 degrees Celsius. Space and district heating are the major direct uses of geothermal energy. Equipment employed in direct use projects is of standard manufacture and includes downhole and circulation pumps, transmission and distribution pipelines, heat exchangers and convectors, heat pumps and chillers. Direct uses of earth heat discussed are space and district heating, greenhouse heating and fish farming, process and industrial applications. The economic feasibility of direct use projects is governed by site specific factors such as location of user and resource, resource quality, system load factor and load density, as well as financing. Examples are presented of district heating in Klamath Falls, and Elko. Further developments of direct uses of geothermal energy will depend on matching user needs to the resource, and improving load factors and load density.
Authors:
Publication Date:
Jan 01, 1990
Product Type:
Technical Report
Subject:
15 GEOTHERMAL ENERGY; Geothermal Legacy
Sponsoring Organizations:
USDOE
OSTI ID:
894593
Research Organizations:
OIT Geo-Heat Center, Klamath Falls, OR
Country of Origin:
United States
Language:
English
Announcement Date:
Nov 07, 2006

Citation Formats

Lienau, P J. Direct Heat. United States: N. p., 1990. Web.
Lienau, P J. Direct Heat. United States.
Lienau, P J. 1990. "Direct Heat." United States.
@misc{etde_894593,
title = {Direct Heat}
author = {Lienau, P J}
abstractNote = {Potential resources and applications of earth heat in the form of geothermal energy are large. United States direct uses amount to 2,100 MWt thermal and worldwide 8,850 MWt above a reference temperature of 35 degrees Celsius. Space and district heating are the major direct uses of geothermal energy. Equipment employed in direct use projects is of standard manufacture and includes downhole and circulation pumps, transmission and distribution pipelines, heat exchangers and convectors, heat pumps and chillers. Direct uses of earth heat discussed are space and district heating, greenhouse heating and fish farming, process and industrial applications. The economic feasibility of direct use projects is governed by site specific factors such as location of user and resource, resource quality, system load factor and load density, as well as financing. Examples are presented of district heating in Klamath Falls, and Elko. Further developments of direct uses of geothermal energy will depend on matching user needs to the resource, and improving load factors and load density.}
place = {United States}
year = {1990}
month = {Jan}
}