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

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

So I'll heat water with the RTG to create a heat reservoir, then I'll make the return air bubble through it.

From Literature