Result
Preliminary calculation: This tool is for quick sizing and information. In real projects, load calculation, selection and commissioning require engineering calculations and a site survey. Results are approximate values.
Formula
IPLV = 0.01·A + 0.42·B + 0.45·C + 0.12·DA chiller often does not run at full load. That is why efficiencies at 75% and 50% load make up most of the total weighting. This tool combines manufacturer COP values given under the same standard conditions; do not directly compare values given under different conditions.
- Variable-speed compressors and inverters increase part-load efficiency
- Low condenser water temperature increases efficiency
- A dirty condenser/evaporator reduces efficiency; maintenance is important
Frequently asked questions
What is IPLV?
It is the integrated part load value; a weighted average of the chiller's efficiency at different load levels.
What does kW/TR show?
The electrical power consumed per ton of cooling; a lower value means more efficient.
Is IPLV alone enough?
No. To determine real annual energy, a detailed analysis with the load profile, climate and operating temperatures is required.