Condenser Heat-Load Estimator

How much cooling does your evaporation actually demand? Pick a solvent and an evaporation rate, and compare the condensing duty with the DCP-5 rating.

Condensing duty of the selected solvent 700 W — manufacturer cooling capacity at 20 °C coolant Selected evaporation rate
Condenser heat load
275 W
Share of the 700 W ref
39 %
Latent rate at 700 W / 20 °C ref
3.8 L/h

At this rate the condensing duty exceeds the 700 W the manufacturer publishes for the DCP-5 at 20 °C. Reduce the evaporation rate, or size a larger circulator.

Schematic teaching tool. The heat load is the latent heat released as vapor condenses: Q = rate × density × ΔHvap, using enthalpies of vaporization at the normal boiling point. It excludes sensible cooling of the vapor and of the returning coolant, ambient gain in hoses, and any heat the bath adds — real duty is higher, so allow margin. Property values (density, molar mass, enthalpy of vaporization at the normal boiling point) are approximate reference data, not manufacturer data; density and ΔHvap both vary with temperature and pressure, and the calculation covers latent heat only. The 700 W line is the manufacturer’s single published figure at a 20 °C coolant temperature; capacity at lower setpoints is not published and is lower. Confirm circulator selection against your process and the manufacturer’s documentation.