Heat Rate from Mass Flow
Heat Rate from Mass Flow
Heating or cooling a continuous flow — in a boiler, radiator or process line — relates the duty to the mass flow and temperature change.
The heat rate is Q = ṁ·c·ΔT. where ṁ is the mass flow rate, c the specific heat and ΔT the temperature change.
Inputs
m_dot := 0.5 kg/s=0.5 kg/s
c := 4186 J/(kg·K)=4186 m^2/K/s^2
dT := 15 K=15 K
Multiply mass flow, specific heat and temperature change.
Q := m_dot·c·dT=31395 W
Results
The result is a power (rate of heat transfer), directly comparable to a heater or chiller rating. It is the steady-flow form of the sensible-heat equation.
Assumptions & limitations
- Steady flow, constant specific heat.
- No phase change.
- Negligible kinetic/potential energy change.