Heat Exchanger Calculator
Calculate the heat transfer rate in a heat exchanger from flow rate, specific heat, and temperature difference.
kg/s
kJ/(kg-K)
deg C
deg C
Heat Transfer Rate
250.80 kW
Temperature Difference30.0 deg C
Heat Transfer Rate vs Mass Flow Rate
Formula
## 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).
Esempio Risolto
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.