2014), is higher than any IPLV
in effect or proposed world wide.
Component level efficiency metrics such as those prescribed by ASHRAE Standard 90.1 (i.e., EER, IPLV
, COP, annual fuel utilization efficiency, etc.) do not fill this gap, as they do not consider component interactions, nor do they represent the efficiency of a building system as a whole.
3) Integrated part load value (IPLV
) measures the efficiency of air-conditioners under a variety of conditions: several partial operational load ratios and coolant water temperatures similar to those in actual usage, to reflect seasonal changes in operational conditions.
 The integrated part load value (IPLV
) rating system was developed by the Air-Conditioning and Refrigeration Institute (ARI) of the U.S.
Some models are operating at 0.345 kW per ton at the IPLV
level, in comparison to traditional chillers that operate at an average of 0.53 kW per hour.
Common energy efficiency indexes such as energy efficiency ratio (EER) (DOE 2012b), seasonal energy efficiency rating (SEER) (ASHRAE 2007), integrated part-load value (IPLV
) (AHRI 2011), annual fuel utilization efficiency (AFUE) (DOE 2012a), and heating seasonal performance factor (HSPF) (AHRI 2014) are based on testing in a laboratory, which is different from normal operating conditions.
STANDARD STANDARD 90.1-2016 STANDARD 90.1-2016 90.1-2016 55[degrees]F 42[degrees]F STANDARD CHILLED WATER CHILLED WATER CONDITIONS FL IPLV
Equipment types that were modeled are an R-410a dual-circuit 8 1/2-ton (29.8 kW) 13.2 IEER TXV-equipped package unit, and an R-22 dual-circuit 20-ton (70.1 kW) 11.2 IPLV
orifice-equipped rooftop unit.
Currently, the HVAC community is creating alternate, more comprehensive metrics, such as the integration part load value (IPLV
The chiller boasts excellent efficiency of COP 7.0 and IPLV
of 12.0 at AHRI conditions.
From a cooling mode perspective, two high-efficiency 457 kW (130 kW) chillers (EER 20, IPLV
0.361 kW/ton [0.103 kW/kW]) are installed using R-134a refrigerant.