TM-5-855-4
the surface area in contact with the water. Also, the volume of water or amount of excavation is less for
the reservoir with the smallest cross-section.
(6) If a reservoir is to be used ultimately as a heat sink for the waste heat from a prime mover such
as a diesel engine, the maximum water temperature can probably be higher than 1000 F. For case 2 with
other conditions the same but with the maximum allowable water temperature equal to 1600 F instead of
1000 F, the length of the reservoir adjusted proportionally to the temperature differential would be
rock does not vary. The reason is that this percentage is governed by the time available for heat
absorption by the rock for a reservoir of a given equivalent radius.
5-6
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