How much heat can be stored in one cubic meter of water in a heat exchanger at 25 C?

Answer 1

Heat stored is based on a change in temperature.

If you heat the water to 75 C, then you can extract that heat when the water is cooled to 25 C again.

1 cubic meter of water is 1,000,000 grams

Heat absorbed or released = specific heat capacity x mass x change in temperature.

= (1 cal / g C) x (1,000,000 g) x (75 - 25)C

= 50,000,000 calories

lower temperature change means less heat stored.

Answer 2

The amount of heat that can be stored in one cubic meter of water at 25°C in a heat exchanger would depend on the specific heat capacity of water, which is approximately 4186 J/kg°C. Using this value, the heat capacity of water would be 4186 J/kg°C x 1000 kg/m³ = 4,186,000 J/m³°C. So, at 25°C, 1 cubic meter of water could store up to 104.65 MJ of heat.