heat reservoir
a hypothetical body of infinitely large mass capable of absorbing or rejecting unlimited quantities of heat without undergoing appreciable changes in temperature, pressure, or density.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use heat reservoir in a sentence
He had to pump that heat into a heat-reservoir—a water tank probably—to protect himself.
The Ultimate Weapon | John Wood CampbellUnder certain circumstances the heat reservoir may be heated in the heat reservoir chamber.
G is the heat reservoir chamber, in which the heat is communicated from the hot reservoir to the air.
A is a concave mirror for concentrating the solar rays upon the heat reservoir, B, which is a mass of iron.
A vertical stack or flue, I, communicates with the heat reservoir chamber, for conveying the heated air away for use.
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