[Bldg-sim] How do you model minimum and high efficiency DX cooling and heat pump equipment?

[Jason Glazer]

I just posted a question on unmet hours:

https://unmethours.com/question/101487/how-do-you-model-minimum-and-high-efficiency-dx-cooling-and-heat-pump-equipment/

"I’m trying to get an understanding of the practice of 
modelers when comparing minimum efficiency and 
high-efficiency DX equipment and heat pumps for different 
applications. I know that detailed performance data is 
sometimes difficult to get. How successful have you been in 
trying to get detailed performance data from vendors? If you 
can’t get data like that, how do you model the equipment? 
How do you model the indoor fan? If you know it is 
multispeed, how do you figure out those details? What if all 
you have is the AHRI data (EER/EER2, SEER2/IEER, COP at 
17/47, capacities, full load/intermediate/minimum airflows) 
what assumptions do you have to make? What performance 
curves do you use? If you can get data from the 
manufacturer, what assumptions do you still need to make? Is 
it different for residential size equipment than commercial?"

If you can respond to this email or post a response on 
unmethours, I would appreciate it.

Thanks

Jsaon


-- 
Jason Glazer, P.E., BEMP, GARD Analytics, ASHRAE 209 chair
Admin for onebuilding.org building performance mailing lists