heat reservoir

American  

noun

Thermodynamics.

1. 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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Example Sentences

At about 2,700 feet, it found a heat reservoir with temperatures of some 250 degrees Fahrenheit.

From The Wall Street Journal

Because of this difference, water is a better heat reservoir than land – especially big bodies of water, like oceans.

From Salon

Even an old air raid bunker in the Wilhelmsburg district has been transformed into a so-called “energy bunker”, with a large heat reservoir.

From The Guardian

The oceans are a massive heat reservoir, absorbing some 90% of the warming from human-caused climate change.

From Science Magazine

The regulator needs to send air to the AREC, then the return air needs to bubble through the heat reservoir.

From Literature