Cooling Process Calculator

This calculator determines the sensible, latent, and total cooling loads for a single A→B process. Enter CFM and elevation, then define the Entering and Leaving air by specifying dry bulb plus one other property (wet bulb, dew point, relative humidity, humidity ratio, enthalpy, or specific volume). If the entering air is a mixture of two airstreams — return air and outdoor air, for example — use Mix Airstreams on the Entering Conditions section to enter both streams and have the mixed condition and total airflow filled in for you. When the process cools and dehumidifies, sensible and total loads are taken to the apparatus dew point — the leaving air's dew point on the saturation curve, which is where the coil must bring the air — and any heat needed to bring the air back up to the leaving dry bulb is shown separately as Reheat. With the Standard air density basis, elevation applies the altitude density factor (DF) to all three load factors automatically. Choose Entering Air instead when your CFM is the actual airflow at the entering condition, such as high outdoor-air designs, and the loads use the entering air's own density. Results include sensible, latent, and total load (BTU/hr and tons), moisture removal (lb/hr), and any reheat. Use Select on Chart to pick either state on a psychrometric chart.