Engineering tools
Heat exchanger calculators
Quick first estimates for heat duty and LMTD. Paste the results into your enquiry and we'll take it from there.
Engineer's toolbox
Quick sizing calculators
Get a first estimate of heat duty and LMTD before you send us your datasheet. Our engineers will verify and optimise the final design.
- Heat duty in kW, MW, refrigeration tons, kcal/h and BTU/h
- Counter-current LMTD and temperature approach
- Results you can paste straight into your RFQ
Heat duty · Q = ṁ · Cp · ΔT0kW
Refrigeration
0 TR
Metric
0 kcal/h
Imperial
0 BTU/h
LMTD · counter-current flow0°C
ΔT₁ (hot end)
0 °C
ΔT₂ (cold end)
0 °C
Min. approach
0 °C
Indicative values only. Final thermal design must be verified by our engineers.
Engineering tools
The formulas behind the tools
Heat duty
Q = ṁ · Cp · ΔTMass flow (kg/s) × specific heat (kJ/kg·K) × temperature change (K) gives the duty in kW.
Log mean temperature difference
LMTD = (ΔT₁ − ΔT₂) / ln(ΔT₁/ΔT₂)The effective temperature difference driving heat transfer in counter-current flow.
Required area
A = Q / (U · F · LMTD)U is the overall heat transfer coefficient and F is the correction factor for multi-pass designs.
Handy conversions
| Unit | Equals |
|---|---|
| 1 TR | 3.517 kW |
| 1 kW | 859.8 kcal/h |
| 1 kW | 3,412 BTU/h |
| 1 MW | 284.3 TR |
| 1 bar | 14.504 psi |
| °F | °C × 1.8 + 32 |
Planning a shutdown in the Gulf?
Tell us the date. We'll plan fabrication and shipping backwards from it, so the equipment is at your site when your team needs it.