Chiller IPLV

Part load values are entered in the chiller curve. Each simulation software would be somewhat different in where to enter this information.

I humbly disagree:

IPLV (and SEER,etc.) is a rating value that is the result of physical tests on a physical machine which happens to behave in a way that can be described using (part-load) performance curves or performance matrixies (note the plural). If you run your simulated chiller, the software should be able to reproduce the IPLV rating value based on the curves and simulated laboritory test boundry conditions. The tests are slightly different depending exactly on what kind of machine it is. Not all softwares are equally good at doing this and some require improvement to correct some aspects not considered.

The fact remains that two completely different performance sets (curves) can produce the same IPLV rating value. You can make nonsense curves to do this which will make your chiller behave completely unrealistically or use a very intellegent procedure to produce a "baseline" curve derived to be as close to the proposed machine's real curve as possible whilst still producing the desired IPLV value. No software does this.

In my experience, this is one of the weekest parts of the standard at the moment, but we are working to correct it. My advise is to use a real machine's curves of a machine that as closely matches the baseline capacity and type as possible and live with the fact that it's performance and IPLV may be slightly better than the required baseline IPLV rating value.

Note that these curves are usually normalized around a rating point and use the COP and Full Load Capacity at that point.

I don't think we disagree. I was vague and unclear and you were more thorough and precise. It is all about the curves.

Trace 700 has built-in ASHRAE 90.1 2007 and 2010 library. They have created the curves for all the equipment in ASHRAE 90.1