Aquifer thermal energy storage reference manual: seasonal thermal energy storage program Page: 40 of 99
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Preliminary Findings of the Economic Analysis Task
Excerpts from: The Economics of Aquifer Storage of Chilled Water for Air
Conditioning by R. W. Reilly, D. R. Brown, and H. D. Huber, presented at the
15th Intersociety Energy Conversion Engineering Conference, August 18-22,
1980, Seattle, Washington.
Air conditioning of residential and commercial buildings consumes 3.5% of
the nation's total energy budget, about 2.7 quads/year. This cooling is gener-
ally supplied by compression-cycle air conditioners or absorption chilling
devices. The former impose expensive peak-load capacity requirements upon
electric utilities, whereas the latter consume fossil fuels. One alternative
to these conventional technologies is cooling by chilled water delivered to
the demand site in pipelines. Winter-chilled water can be injected into aqui-
fers and recovered during the summer for air conditioning by fan-coil cooling
systems. Furthermore, such cooling systems can be used for industrial process
chilling operations at temperatures around 450F, and for pre-chilling of
materials for processes occurring below this temperature. Direct consumption
of fossil fuels is eliminated, and the consumption of electricity during times
of peak demand is considerably less than would be experienced with electric
compression devices. Widespread use of such a cooling technology could have a
significant impact upon the nation's demand for scarce energy resources.
Assuming that the technology of such an aquifer storage cycle is well
in-hand (and there appear to be no major technical difficulties), then the
most important factor affecting its commercial use is economics. We have
developed cost estimates for chill energy delivered to a point demand under a
range of economic and technical conditions. By investigating a point demand
as the load, two purposes are accomplished:
Emphasis is placed upon the effects of various energy collection and
storage parameters upon the cost of cooling, rather than upon the poten-
tially overwhelming cost effect of a large distribution system.
DATE ISSUED: SUPERSEDES PNL-3471 SECTION 3.2
Auaust 1980 ISSUE DATED: New PAGE 5
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Prater, L.S. Aquifer thermal energy storage reference manual: seasonal thermal energy storage program, report, January 1, 1980; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1053829/m1/40/: accessed May 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.