Calcolatore Forza di Resistenza — 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.

  1. delta_T = 80 - 50 = 30 deg C
  2. Q = 2 x 4.18 x 30 = 250.8 kW
  3. This is the heat that must be transferred to the cooling medium.