Active

print results

custom fluid properties

K factor for fittings, resistance coefficient

compressible isothermal flow

To use calculator you should enable java script in your browser.

Action

Calculation setup

Flow rates and heat power

Diameter and velocity

Temperatures

If you need a quick calculation, but you are not still familiar how to use the calculator, you can order calculation service from the calculator developer.

Read more about calculator application and check if calculator is suitable for your problem.

Also, read about calculation procedures, what you have to know for the calculations and what limitations apply.

Subscribed users have access to the full service which includes:

- One click switch from metric to imperial units
- Export results in word or excel format
- Preview, copy and paste results from a web page to your text editor
- Send results to you email

Read all about available deployments. In any way of utilizing calculator, Internet connection is required, for authentication at least.

- 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
- T
_{1}- inlet temperature - Fluid temperature in front of the heat exchanger
- T
_{2}- 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

- 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