How to use the fluid heat duty calculator
Find the heat carried by a flowing fluid as it is heated by a given temperature rise. Enter mass flow rate, specific heat, temperature rise in the fields above; the heat duty are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “heat duty of flowing water”, “heater power for flow”, “mass flow heat rate”, “calculate fluid heat duty”, “find heat duty”.
Formula
Variables
- md — Mass flow rate (kg/s)
- cp — Specific heat (J/(kg·K))
- dT — Temperature rise (K)
Worked example
With mass flow rate = 2 kg/s, specific heat = 4186 J/(kg·K), temperature rise = 15 K, the calculator gives heat duty ≈ 125.58 kW; heat duty ≈ 107,998.8 kcal/h.
Frequently asked questions
What is the fluid heat duty calculator used for?
Find the heat carried by a flowing fluid as it is heated by a given temperature rise. It helps with questions such as “heat duty of flowing water”, “heater power for flow”, “mass flow heat rate”.
What is the formula for the fluid heat duty calculation?
Heat duty (kW) = md × cp × dT / 1000. Heat duty (kcal/h) = [Heat duty] × 860. Here md is mass flow rate (kg/s), cp is specific heat (J/(kg·K)), dT is temperature rise (K).
What inputs do I need for the fluid heat duty calculator?
You need mass flow rate in kg/s, specific heat in J/(kg·K), temperature rise in K. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the fluid heat duty calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the fluid heat duty result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.