The heat load formula is given as,
Heat load = Q = m × Cp ×ΔT
Where,
Q = Heat load (kW)
m = mass flow rate (kg/s)
Cp = specific heat (kJ/kg K or kJ/kg oC)
ΔT = change in temperature (K or 0C)
Example 1
Determine the heat load in the electric convector in which the rate of mass flow is 5.45 and Cp is 1000 and the enthalpy is from 21.5 to 26.55.
Solution:
Given:
M = 5.45
Cp = 1000
T1 = 26.55
T2 = 21.5
Substituting in the formula
Heat load , Q = m ×Cp ×ΔT
Q = 5.45 x 1000 x (26.55 – 21.5)
Q = 27522.5 W