What Does Chiller Mean? Cooling Terminology

A chiller is a cooling unit that usually supplies chilled water or another process fluid. Air-cooled describes condenser heat rejection rather than the absence of water in the process circuit.

Chiller and air conditioner

A chiller typically transfers the load through water or another liquid, while a split air conditioner commonly serves air directly. Chillers can support building air conditioning or temperature control for production equipment.

kW, kWh and refrigeration tons

kW expresses power or cooling duty; kWh expresses energy over time. A refrigeration ton is a cooling-capacity unit equal to approximately 3.517 kW. Electrical power is expressed in kW, not kW/h.

Flow, delta T and COP

Flow describes fluid quantity per unit time; delta T is the inlet-to-outlet temperature difference. COP compares cooling duty with electrical input. Values must refer to the same operating condition to support a useful comparison.

Project inputs and calculation boundaries

For a quotation, specify approximate heat duty, fluid, inlet and outlet temperatures, flow, pressure loss and operating hours. Design ambient conditions, indoor or outdoor location and electrical infrastructure are also selection inputs. Flow and temperature readings must represent the same operating point. Do not transfer a catalogue capacity directly to different temperatures; confirm model performance at the required duty.

Commissioning and operating records

Check circuit cleanliness, filtration, air removal, proven flow and sensor readings. Record reference water temperatures and load conditions during commissioning. These values provide a baseline for maintenance and alarm investigations. Confirm pumps, tanks, connections and control options against the agreed quotation scope.

Frequently asked questions

Is the series capacity range sufficient for final selection?

No. Confirm the actual model at the required fluid temperature, ambient conditions, fluid properties and hydraulic duty.

Is cooling capacity the electrical consumption?

No. Cooling kW and electrical-input kW are different quantities. An energy assessment also needs actual load and operating hours.

What information is needed for a quotation?

Provide the industry or equipment, target temperature, approximate duty, flow, ambient conditions, operating hours and details of the existing system.

These explanations provide general engineering guidance. Examples are not field measurements or performance guarantees for a particular model.