Chiller Sizing Calculator
Static · formula-only · worked example computed when this page was built · no live data
The Chiller Sizing Calculator picks the chiller capacity (TR/kW) and efficiency for a cooling load with a design margin. Example: for a 300 kW cooling load on a water-cooled chiller (COP 5.5), with a 1.15 design safety factor, Recommended capacity = 100.1 TR, Capacity = 352 kW, Efficiency = 0.64 kW/TR (per ASHRAE 90.1-2019 Table 6.8.1 | AHRI 550/590 | ASHRAE 2021 Ch.2).
How it works
Computed from your inputs per ASHRAE 90.1-2019 Table 6.8.1 | AHRI 550/590 | ASHRAE 2021 Ch.2. Anything the worked example does not state uses this calculator's standard default; the interactive version shows every input and lets you change it.
Worked example (HVAC & Cooling)
Inputs: a 300 kW cooling load on a water-cooled chiller (COP 5.5), with a 1.15 design safety factor.
| Result | Value |
|---|---|
| Recommended capacity | 100.1 TR |
| Capacity | 352 kW |
| Efficiency | 0.64 kW/TR |
Computed by WorkHive's calculation engine when this page was built; standard: ASHRAE 90.1-2019 Table 6.8.1 | AHRI 550/590 | ASHRAE 2021 Ch.2.
How to use this calculator
- Read the worked example. It uses a 300 kW cooling load on a water-cooled chiller (COP 5.5), with a 1.15 design safety factor and shows every number in the method.
- Follow the formula with your own figures: it returns Recommended capacity, Capacity, Efficiency, computed per ASHRAE 90.1-2019 | AHRI 550/590.
- To compute interactively, open the Chiller Sizing Calculator inside WorkHive's free Engineering Design suite (link below). It runs the same method with your inputs.
FAQ
What is a chiller sizing calculator TR?
The Chiller Sizing Calculator is a free online tool that picks the chiller capacity (TR/kW) and efficiency for a cooling load with a design margin. It shows the formula and a fully worked example so you can check the method, not just the number.
How is it calculated?
The result is computed from your inputs following ASHRAE 90.1-2019 | AHRI 550/590. The worked example on this page shows a real computation with real numbers.
Is the calculator free?
Yes. WorkHive is free: this worked example is open to everyone, and the interactive calculator runs inside the free Engineering Design suite after a free sign-up (your work is saved to your account). WorkHive is a free, offline-first maintenance platform built for Philippine industrial plants.
Run it on your own numbers
Open the interactive Chiller Sizing Calculator in WorkHive. Free, and a free sign-up saves your calculations, BOMs and scope-of-works to your account.