## Heat Load Formula :

The heat load formula is Q_{(kw)} in Kelvin per watts is equal the product of mass m_{(kg/s)} in kilogram per second and multiply the specific heat cp_{(kj/kgk/kj/kg0c)} in kilojoule per kilogram Kelvin or degree Celsius and multiply the change in temperature ΔT_{(k or0c)} in Kelvin or degree Celsius. Hence the Heat Load Formula can be written as

**Heat load =Q _{(kw)}=m_{(kg/s)}*cp_{(kj/kgk/kj/kg0c)}*ΔT_{(k or0c)}**

Where,

Q→ Heat load in kw

M→ mass flow rate in kg/s

Cp→ specific heat in KJ/Kg k or kJ/Kg^{0}C

ΔT →change in temperature in K or ^{0}C

## Sample Problems :

Example 1 :

Calculate the heat load in the electric convector in which the rate of mass flow is 4.50 and Cp is 2000 and the enthalpy is from 30.50 to 26.55.

### Solution :

Given,

M=4.50

Cp=2000

T_{1}=30.50

T_{2}=26.55

Heat load Q=m*cp*ΔT

Q=4.50*2000*(30.50-26.55)

Q=35550W

### Example 2:

Calculate the heat load in the electric convector in which the rate of mass flow is 8.30 and Cp is 3000 and the enthalpy is from 45.00 to 48.50.

### Solution :

Given,

M=8.30

Cp=3000

T_{1}=45.00

T_{2}=48.50

Heat load Q=m*cp*ΔT

Q=8.30*3000*(45.00-48.50)

Q= 112045W