What is the difference between COP and IPLV?

COP (Coefficient of Performance) measures the chiller's efficiency at 100% full load. IPLV (Integrated Part Load Value) is a weighted average of efficiency at 100%, 75%, 50%, and 25% loads, better representing performance in real-world variable load conditions.

Does this standard apply to absorption chillers?

No, this standard is exclusively for chillers operating on the vapour compression cycle. Absorption chillers are covered by other standards.

What is the minimum full-load COP for a 600 kW water-cooled screw chiller?

For a water-cooled screw chiller between 528 kW and 1055 kW, the minimum required COP is 5.70, as per Table 2.

Are the EER and COP values the same in this standard?

Yes, for the purpose of this standard, EER (Energy Efficiency Ratio) and COP are defined identically as the ratio of cooling capacity (kW) to power input (kW). See Clause 4.6 and 4.7.

IS 15000

: 2018

Chillers - Specification

CurrentFrequently UsedSpecificationBIMMEP · HVAC and Air Conditioning

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This standard specifies the minimum energy performance standards (MEPS), technical requirements, and testing procedures for vapour compression cycle chillers. It covers both water-cooled and air-cooled chillers, defining performance metrics like Coefficient of Performance (COP) and Integrated Part Load Value (IPLV) to drive energy efficiency in commercial and industrial cooling applications.

Specifies requirements for the design, construction, performance, and testing of chillers used in air conditioning and refrigeration applications.

Quick Reference Values

Min. COP for Water-Cooled Centrifugal Chiller (≥1055 & <2110 kW)6.40 (dimensionless)

Min. IPLV for Water-Cooled Centrifugal Chiller (≥1055 & <2110 kW)7.00 (dimensionless)

Min. EER for Air-Cooled Screw Chiller (<528 kW)2.80 (dimensionless)

Standard Chilled Water Outlet Temperature7 °C

Standard Condenser Water Inlet Temperature (Water-Cooled)30 °C

Standard Outdoor Air Temperature (Air-Cooled)35 °C

Key Formulas

COP = Cooling Capacity (kW) / Power Input (kW)

EER = Cooling Capacity (kW) / Power Input (kW) [Note: EER and COP are identical under this standard]

IPLV = 0.01A + 0.42B + 0.45C + 0.12D (where A, B, C, D are COP values at 100%, 75%, 50% and 25% load)

Practical Notes

The specified efficiency values (COP/IPLV) are for standard test conditions only; actual site performance will differ based on operating conditions.

This standard is a key part of the mandatory Bureau of Energy Efficiency (BEE) Star Labelling program for chillers, impacting procurement and regulatory compliance.

Verify the chiller nameplate confirms compliance with IS 15000:2018 and clearly states the rated COP and IPLV values.