Cooling-Water Flow: Start With the Allowed Temperature Rise

Define the Thermal Model

For single-phase sensible cooling with nearly constant properties, P = ṁ cₚ(T_out − T_in). Alfa Laval’s calculation method relates heat load to mass flow and temperature change. The resulting utility flow does not by itself show whether the exchanger can reach the process outlet temperature.

Compare a Hypothetical Case

For an invented 40 kW duty and cₚ = 4 kJ/(kg·K), allowing the utility to warm by 5 K requires 2 kg/s. Allowing 10 K gives 1 kg/s in the same energy model. Converting either result to litres per minute also needs the utility density; a mass-flow result should not silently become a volume-flow specification.

Complete the Engineering Review

Record the warmest expected inlet and permitted return temperature. Keep utility temperature rise distinct from the hot-to-cold terminal approach. Ask the supplier to check area, flow distribution and pressure drop at the calculated rate. If a site return-temperature limit changes, revise the flow basis rather than leaving a rounded legacy litres-per-minute value.

For a manufacturing-vessel cooling discussion, provide actual utility data and the required product duty. The example is not an HM cooling-water specification. A balanced sensible-energy calculation cannot establish a phase-changing utility or an achievable process endpoint without a suitable transfer model.

What mass flow follows from a stated sensible cooling duty and permitted utility temperature rise?

This blank worksheet is for your own project. It contains no H M machine trial result.

Customer Questions

Related Equipment References

Review the actual offered equipment and application separately from this educational example.

• manufacturing-vessel cooling discussion

Primary References

These references support the technical principles discussed in this guide. The worked examples and review questions are educational.

• Alfa Laval’s calculation method
• manufacturing-vessel cooling discussion