Commercial production of ethanol in the San Luis Valley, Colorado. Final Report Page: 23 of 222
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h) Develop a comprehensive energy balance for the entire facility and
determine the specific benefits of geothermal heat utilization in
terms of equivalent fossil fuel and electricity savings.
i) Develop a conceptual design of a commercial ethanol production
facility utilizing geothermal energy as its principal energy source.
j) Evaluate the sensitivity of the economic analysis to changes in geo-
thermal parameters, interest rates, feedstocks, supply water avail-
ability and electricity costs.
k) Determine the life cycle costs of the facility based on estimates of
capital, operations and maintenance, and feedstock costs and antici-
pated ethanol product and by-product market values.
1) Provide an analysis of the environmental aspects of the development
and operation of the proposed facility.
m) Provide an analysis of the institutional barriers and factors relating
to the proposed facility including, specifically, water rights.
n) Provide a final report which addresses the feasibility of utilizing
geothermal energy at San Luis for the commercial production of
fuel grade ethanol and, if it is technically, economically and envi-
ronmentally feasible, provide a specific contingency plan that
describes the necessary steps leading to the construction and opera-
tion of a follow-on field experiment which might be required to
demonstrate technical viability.
The final report on the Commercial Production of Ethanol in the San Luis
Valley documents the technical, environmental, institutional and economic analyses of
manufacturing ethanol with geothermal energy used for process heat. Section 2 eval-
uates ethanol production techniques and identifies temperature requirements for pro-
cess steps that would be adapted to the use of geothermal energy. Section 3 addresses
regional considerations including a preliminary evaluation of the characteristics of a
geothermal resource, a reservoir confirmation plan to establish the presence of an
acceptable resource, the logistics of feedstock availability and supply, water require-
ments and rights, institutional and environmental considerations and associated mitiga-
tion measures. Section 4 addresses the initial considerations of the ethanol process and
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Hewlett, E.M.; Erickson, M.V.; Ferguson, C.D.; Sherwood, P.B.; Boswell, B.S.; Walter, K.M. et al. Commercial production of ethanol in the San Luis Valley, Colorado. Final Report, report, July 1, 1983; United States. (digital.library.unt.edu/ark:/67531/metadc874948/m1/23/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.