Free Heat Exchanger Calculator
Calculate the heat transfer rate in a heat exchanger from flow rate, specific heat, and temperature difference.
Heat Transfer Rate
250.80 kW
Heat Transfer Rate vs Mass Flow Rate
Heat Exchanger Energy Balance
The heat transfer rate is determined by the fluid properties and temperature change.
Formula
Q = m_dot cp delta_T
where m_dot is the mass flow rate, cp is the specific heat capacity, and delta_T is the temperature change of the fluid. This applies to each fluid stream independently; at steady state, the heat lost by the hot stream equals the heat gained by the cold stream (minus losses).
Example Calculation
Water at 2 kg/s cooled from 80 deg C to 50 deg C.
- 01delta_T = 80 - 50 = 30 deg C
- 02Q = 2 x 4.18 x 30 = 250.8 kW
- 03This is the heat that must be transferred to the cooling medium.
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