GEOTHERMAL TECHNOLOGIES LEGACY COLLECTION - Bibliographic Citation


Bibliographic Citation



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Full Text: Citation URL: http://www.osti.gov/geothermal/product.biblio.jsp?osti_id=5432469
Title: Preliminary investigations of the thermal energy grid concept
Creator/Author: Olszewski, M.
Publication Date:1977 Oct 01
OSTI Identifier:OSTI 5432469
Report Number(s):ORNL/TM-5786
DOE Contract Number:W-7405-ENG-26
Document Type:Technical Report
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Research Org:Oak Ridge National Lab., Tenn. (USA)
Sponsoring Org:USDOE
Subject:29 ENERGY PLANNING, POLICY AND ECONOMY; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; CO-GENERATION; DISTRICT COOLING; DISTRICT HEATING; FEASIBILITY STUDIES; DUAL-PURPOSE POWER PLANTS; HEAT DISTRIBUTION SYSTEMS; ECONOMICS; ENERGY TRANSPORT; EQUIPMENT; FOSSIL-FUEL POWER PLANTS; HOT-WATER SYSTEMS; IMPLEMENTATION; NUCLEAR POWER PLANTS; STEAM; STEAM GENERATION; COOLING; GEOTHERMAL SYSTEMS; HEATING; HYDROTHERMAL SYSTEMS; NUCLEAR FACILITIES; POWER GENERATION; POWER PLANTS; THERMAL POWER PLANTS
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Description/Abstract:This study examines, in a preliminary manner, the feasibility of the thermal grid concept. This concept essentially envisions the supply of heat to a long-distance transmission line from a dual-purpose nuclear or coal-fired power plant. The transmission line delivers heat to a subregion distribution network which delivers it to the consumer. District chilled water supply is also considered, using heat from the grid to power steam-turbine-driven water chillers. Candidate technologies for generation, transmission, and distribution of thermal energy are identified and assessed. Potential applications, including both industrial use and residential space conditioning and hot water supply, are evaluated. Results indicate that high-temperature hot-water transmission lines are favored for longer distances, while steam lines may be acceptable for shorter distances. It is also evident that thermal grid heat is more economically competitive for new applications, as opposed to retrofit situations, in the residential-commercial sector. The two applications are about equally feasible in the industrial sector. The results further indicate that thermal grid heat is most competitive in areas of high-heat-load density and expensive fuel costs. It appears that the thermal grid service area should include the industrial sector as a base load. The multifamily residential-commercial sector space and water heating loads can be added to the service area to maximize utilization of the transmission line and maintain low transmission costs. Supply of chilled water to the multifamily residential-commercial sector can also be included for new applications to increase the transmission line use factor. The thermal grid concept appears to be economically and technically feasible, when compared to oil and electric systems in the multifamily residential-commercial sector and coal- or oil-fired systems in the industrial sector, and should be explored in greater detail.
Publisher:
Country of Publication:US
Language:English
Size/Format:Medium: ED; Size: Pages: 107
Rights:
Availability:Dep. NTIS, PC A06/MF A01.
System Entry Date:2013 Jul 08
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