Ask Your Question
2

PG&E Cool Tools Chiller tool- Generating Performance Curve E+

Hello,

Is it possible to use performance coefficient generated by PG&E Cool Tools Chiller tool can be used as an input in E+? It is my understanding that the chiller curve data are dimensionless ratios, so the curve-fits should work regardless of units-system. The raw data would be different, but the curve coefficients should be identical.Is it so??

Please help!

regards,

Javed's avatar
273
Javed
asked 2017-05-29 10:10:44 -0500
__AmirRoth__'s avatar
4.4k
__AmirRoth__
updated 2017-05-29 11:28:14 -0500
edit flag offensive 0 remove flag close merge delete

Comments

You can also try the EnergyPlus curve fit tool. You'll find a macro enabled excel spreadsheet in your EnergyPlus installation folder - in the PreProcessing directory.

TomB's avatar TomB (2017-05-29 15:28:32 -0500) edit
more
  • delete

Thanks. I tried to use the excel sheet and also referred post on the same topic "How to determine custom chiller performance curves with correct coefficients" posted on 22 March 2016. I followed the steps and it has generated IDF with the performance curve objects but all the values are zero. Have you encountered such issues ever?

Thanks,

Javed's avatar Javed (2017-05-30 04:45:39 -0500) edit
more
  • delete
add a comment see more comments

1 Answer

3

I recently asked this same question- and the answer is no, the chiller curve coefficient are unit-dependent. You need to convert them to use them in different unit systems.

https://unmethours.com/question/25676...

Anna Osborne Brannon's avatar
2.9k
Anna Osborne Brannon
answered 2017-08-20 23:49:32 -0500
edit flag offensive 0 remove flag delete link
more

Comments

1

@Anna Osborne Brannon, I just noticed that there is a tool in the PreProcess folder of the Energy Plus installation that appears to convert IP curves to SI curves. Look in the "CoeffConv" folder under "PreProcess". From the ReadMe.txt in that folder: "CoeffConv is a program to convert DOE-2 temperature dependent curves in Fahrenheit to EnergyPlus curves in Centigrade. The program converts the Doe-2 coefficients of a biquadratic curve to the equivalent EnergyPlus biquadratic curve coefficients."

Molly Curtz's avatar Molly Curtz (2018-03-13 13:49:32 -0500) edit
more
  • delete
add a comment see more comments