Fort Hood solar cogeneration facility conceptual design study Page: 30 of 183
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a deaerator, absorption chiller and accumulator for low temperature thermal
storage. The condensed steam is cooled, treated and reheated for recirculation
into the steam generator. All equipment is skid-mounted at the factory with
the remaining connections to be made at the site. A single building will
house most all of the power generating equipment except the cooling tower
and control console.
Absorption Chiller
The air conditioning unit is an existing Trane two-staged absorption chiller
with an output rating of 800 tons. Turbine exhaust steam is used to vaporize and
condense a lithium bromide/water solution which, in turn, chills water to
6°C (42°C) for circulation to the complex through existing chilled water
lines. Two chilled water storage tanks are included in the loop to provide
chilled water for nighttime operations. The absorption chiller is located
inside the turbine/generator building, and the storage tanks are located next
to this building.
I ' /
Low Temperature Thermal Storage
A low temperature thermal storage system has been incorporated to provide
steam at 2 bar (29 psia), T21°C (250°F) to the complex for domestic water
heating and room heating during the nighttime. Turbine exhaust steam is
routed through an accumulator where it is condensed and stored under pressure.
Upon demand, this pressurized water is converted into steam and passed
through a heat exchanger to generate steam in a separate loop for distribution
to the complex through the existing steam lines. The accumulator storage
tanks are located near the sular turbine/generator building, and the small
heat exchanger is located inside the present central energy plant.
Cooling Tower
The present cooling tower, located adjacent to the central plant, will also
be used for the solar cogeneration equipment. The existing evaporative,
mechanically induced draft cooling tower is rated at 11.4 million BTU/hr.
Final heat rejection requirements will determine whether it is adequate for
the cogeneration facility. Otherwise, a new tower will be constructed near .
the chilled water tanks.
13
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Fort Hood solar cogeneration facility conceptual design study, report, May 1, 1981; United States. (https://digital.library.unt.edu/ark:/67531/metadc1066964/m1/30/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.