Chiller Selection for HVAC and Air Conditioning
Building duty depends on weather, outdoor-air requirements and occupancy. AHU and fan-coil coils must match the selected water temperatures. Chiller capacity alone does not establish air quality, humidity control or ventilation adequacy.
Application-specific selection
The priority is more than nominal kW. Define temperature stability, minimum and maximum duty, fluid cleanliness and the consequences of downtime. Where separate cooling circuits exist, check simultaneity before combining their duties for model selection.
Hydraulic arrangement and continuity
Match flow and pressure limits between the process equipment and chiller. Consider an intermediate heat exchanger or separate pumping loop where needed. Additional exchanger approach affects water-temperature selection. If redundancy is required, verify that remaining equipment can meet the critical duty.
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.
