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Title: Commercial production of ethanol in the San Luis Valley, Colorado. Final Report

Abstract

The purpose of this study is to assess the commercial feasibility of producing between 76 and 189 million liters (20 and 50 million gallons) of ethanol annually in the San Luis Valley, Colorado using geothermal energy as the primary heat source. The San Luis Valley is located in south-central Colorado. The valley is a high basin situated approximately 2316 meters (7600 feet) above sea level which contains numerous warm water wells and springs. A known geothermal resource area (KGRA) is located in the east-central area of the valley. The main industry in the valley is agriculture, while the main industry in the surrounding mountains is lumber. Both of these industries can provide feedstock for the production of ethanol.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Westec Services, Inc., San Diego, CA
Sponsoring Org.:
USDOE
OSTI Identifier:
891518
Report Number(s):
DOE/ID/12193-3
DE84002425; TRN: US200622%%246
DOE Contract Number:
FC07-811D12193
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; AGRICULTURE; COLORADO; ETHANOL; GEOTHERMAL ENERGY; HEAT SOURCES; KGRA; MOUNTAINS; PRODUCTION; SEA LEVEL; WATER WELLS; Geothermal Legacy

Citation Formats

Hewlett, E.M., Erickson, M.V., Ferguson, C.D., Sherwood, P.B., Boswell, B.S., Walter, K.M., and Hart, M.L. Commercial production of ethanol in the San Luis Valley, Colorado. Final Report. United States: N. p., 1983. Web. doi:10.2172/891518.
Hewlett, E.M., Erickson, M.V., Ferguson, C.D., Sherwood, P.B., Boswell, B.S., Walter, K.M., & Hart, M.L. Commercial production of ethanol in the San Luis Valley, Colorado. Final Report. United States. doi:10.2172/891518.
Hewlett, E.M., Erickson, M.V., Ferguson, C.D., Sherwood, P.B., Boswell, B.S., Walter, K.M., and Hart, M.L. 1983. "Commercial production of ethanol in the San Luis Valley, Colorado. Final Report". United States. doi:10.2172/891518. https://www.osti.gov/servlets/purl/891518.
@article{osti_891518,
title = {Commercial production of ethanol in the San Luis Valley, Colorado. Final Report},
author = {Hewlett, E.M. and Erickson, M.V. and Ferguson, C.D. and Sherwood, P.B. and Boswell, B.S. and Walter, K.M. and Hart, M.L.},
abstractNote = {The purpose of this study is to assess the commercial feasibility of producing between 76 and 189 million liters (20 and 50 million gallons) of ethanol annually in the San Luis Valley, Colorado using geothermal energy as the primary heat source. The San Luis Valley is located in south-central Colorado. The valley is a high basin situated approximately 2316 meters (7600 feet) above sea level which contains numerous warm water wells and springs. A known geothermal resource area (KGRA) is located in the east-central area of the valley. The main industry in the valley is agriculture, while the main industry in the surrounding mountains is lumber. Both of these industries can provide feedstock for the production of ethanol.},
doi = {10.2172/891518},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1983,
month = 7
}

Technical Report:

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  • The commercial feasibility of producing between 76 and 189 million liters (20 to 50 million gallons) of ethanol annually in the San Luis Valley, Colorado using geothermal energy as the primary heat source was assessed. The San Luis Valley is located in south-central Colorado. The valley is a high basin situated approximately 2316 meters (7600 feet) above sea level which contains numerous warm water wells and springs. A known geothermal resource area (IGRA) is located in the east-central area of the valley. The main industry in the valley is agriculture, while the main industry in the surrounding mountains is lumber.more » Both of these industries can provide feedstocks for the production of ethanol.« less
  • A feasibility study was performed to evaluate the potential of multipurpose applications of moderate-temperature geothermal waters in the vicinity of the Baca Grande community development in the San Luis Valley, Colorado. The project resource assessment, based on a thorough review of existing data, indicates that a substantial resource likely exists in the Baca Grande region capable of supporting residential and light industrial activity. Engineering designs were developed for geothermal district heating systems for space heating and domestic hot water heating for residences, including a mobile home park, an existing motel, a greenhouse complex, and other small commercial uses such asmore » aquaculture. In addition, a thorough institutional analysis of the study area was performed to highlight factors which might pose barriers to the ultimate commercial development of the resource. Finally, an environmental evaluation of the possible impacts of the proposed action was also performed. The feasibility evaluation indicates the economics of the residential areas are dependent on the continued rate of housing construction. If essentially complete development could occur over a 30-year period, the economics are favorable as compared to existing alternatives. For the commercial area, the economics are good as compared to existing conventional energy sources. This is especially true as related to proposed greenhouse operations. The institutional and environmental analyses indicates that no significant barriers to development are apparent.« less
  • Information on the geothermal resources of the San Luis Valley, Colorado, has been gathered and reviewed and a preliminary, quantitative assessment of the magnitude and quality of resources present was carried out. Complete process designs were developed for the processes of producing crystal sugar from beets and for malting barley for use in the brewing industry, in each case adapting the processes to use a 302/sup 0/F geothermal water supply as the main process energy source. A parametric design analysis was performed for a major pipeline to be used to ship geothermal water, and thus deliver its heat, out ofmore » the San Luis Valley to three major Colorado cities along the eastern threshold of the Rocky Mountains. Cost estimates for capital equipment and energy utilization are presented. The analyses of the two process applications indicate favorable economics for conversion and operation as geothermally-heated plants. A major geothermal water pipeline for this region is seriously limited on achievement of the economy of scale by the physical absence of significant demand for heat energy. Finally, the development and utilization of Colorado's San Luis Valley geothermal groundwaters hold the potential to contribute to the prudent and beneficial management of that area's natural water resources systems.« less
  • The technical report of design and construction of the San Luis unit is divided into seven volumes. Volume I is general in content and treats the entire project with respect to planning, legislation, description of the project area and project features, project accomplishments, and geology. This volume, number II, is more specific in content and discusses the deisgn of San Luis Dam and Pumping-Generating Plant and O'Neil Dam and Pumping Plant. The remaining volumes, also specific in content, deal with the design and construction aspects of other features of the San Luis unit.
  • The technical record of design and construction of the San Luis unit is divided into seven volumes. Volume I is general in content and treats the entire project with respect to planning, legislation, description of project area and project features, project accomplishments, and geology. The remaining Volumes are more specific in content and deal with the design and construction aspects of the principal features of the San Luis unit. This volume, number III, discusses the construction of San Luis Dam and Pumping Plant.