Field glossary
Delta-T
The temperature rise across the unit coil; a strong, stable delta-T means the unit is drawing genuinely hot return air
Also defined as
- HVAC: The temperature difference between water entering and leaving a coil; the chilled water value the plant's efficiency rides on
- HVAC: Temperature rise across the boiler, supply minus return; set by flow and firing rate, commonly 20 to 40 degrees F by design
Where this shows up
DatacenterData center airflow managementDatacenterDelta-T and return temperatureHVACChilled water pumping field guideHVACLow delta-T syndrome field guideDatacenterThermal energy storage tankElectricalInfrared thermography field guideDatacenterIn-row cooling commissioningHVACHydronic balancing field guideDatacenterAisle containment QAHVACFan coil unit field guideDatacenterCRAC/CRAH airflow setupHVACChiller plant startup commissioningHVACBoiler startup commissioning