Free Engineering Simulation Tutorial - Opensource Software & Simulation Guides

Undersize a chiller and your building never cools on the hottest day; oversize it and you pay a premium up front, then waste energy every hour it short-cycles. Getting the cooling load right — and converting it to the right chiller tonnage — is the foundation of every chilled-water and refrigeration system. This free professional chiller / cooling load calculator (validated against industry formulas) finds capacity in tons, BTU/hr and kW three different ways: from chilled-water flow, from airflow, or from floor area — with a built-in safety factor. Figure 1. A chiller removes heat by circulating chilled water. The flow rate (GPM) and the temperature rise across the load (ΔT) give the cooling load — converted here to tons, BTU/hr and kW. Table of Contents The Chiller / Cooling Load Calculator What Is a "Ton" of Cooling? The Chiller Formula Explained Three Ways to Find the Load Safety Factor & Glycol Worked Examples ...

Here's the problem with most online "AC calculators": they multiply your floor area by a single number and call it a day. But a 15×12 bedroom with two shaded north windows and a well-insulated wall needs a completely different air conditioner than the same size room with big west-facing glass under an uninsulated roof — sometimes twice the capacity. Floor area alone can't see that difference. The calculator below can, because it uses the real component heat-gain method from ASHRAE and ACCA Manual J — the same physics HVAC engineers use. Enter your room's actual construction and get a genuinely accurate cooling load, ready for a real purchase decision. Figure 1. A real cooling load is the sum of heat entering through every surface — walls, windows, roof — plus solar radiation through glass, air leakage, and heat from people and equipment. Accurate AC sizing means adding all of these, not guessing from floor area. Table of Contents The R...