Description

P - heat power

Heat energy in the unit of time exchanged in the device.

q - volume flow

Volume flow rate of the fluid at actual pressure and temperature.

ṁ - mass flow rate

Fluid flow rate in terms of units of mass per unit of time

T₁ - inlet temperature

Fluid temperature in front of the heat exchanger

T₂ - outlet temperature

Fluid temperature after the heat exchanger

ΔT - temperature change

Fluid temperature difference before and after the heat exchanger. Gained or lost temperature depending if the device is a heater or a chiller

ρ - fluid density

Actual fluid density in terms of mass per unit of volume on real pressure and the temperature

C - specific heat

Heat capacity (specific heat) of the fluid; Specific heat at constant pressure for a gas, in terms of energy per unit of mass and temperature.

D - diameter of tube

Internal pipe diameter

V - flow velocity

Fluid flow velocity in the pipe of the heat exchanger

Calculation setup

Select calculation type

P

Calculate heat power for known flow rate

q / ṁ

Calculate flow rate for known heat power

Select value to input. You should enter selected one. The other one will be calculated

q

volume flow rate

ṁ

mass flow rate

Select value to input. You should enter selected one. The other one will be calculated

T2

temperature after the heater/chiller

ΔT

temperature difference in the device

Select value to input. You should enter selected one. The other one will be calculated

D

internal pipe diameter

V

fluid velocity

Select device type

Heater

Device that has outlet temperature lower then inlet one, due to heat energy released from the fluid to the surrounding one

Chiller

Device that has outlet temperature higher then inlet one, due to heat energy of the fluid increased and surrounding fluid chilled