[Equest-users] creating performance curves

[Jeremy McClanathan]

There is a document written by Steve Gates that explains how to create custom chiller curves and an example spreadsheet of mine which you can download from the following site:
http://www.esimforums.com/equest/viewtopic.php?f=13&t=116&start=0&view=viewpoll

Jeremy

___________________________________________
Jeremy McClanathan, P.E., BEMP, HFDP, LEED(r) AP
[cid:image001.jpg at 01CDB772.60029870]
19203 36th Avenue W, Suite 200, Lynnwood, WA 98036
P 425-672-1071 | F 425-778-8769
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From: Nathan Miller [mailto:nathanm at rushingco.com]
Sent: Wednesday, October 31, 2012 1:53 PM
To: 'Behnam Jowkar'; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] creating performance curves

This always gets confusing but I believe the curve labeled as EIR-fPLR is not actually EIR as a function of part-load-ratio.

I believe it is input ratio (operating kW as a ratio of full load kW) as a function of part load ratio, so you have to set up your custom curves based on those parameters. The input ratio value should be 1 at the 100% condition.

Nathan Miller, PE, LEED AP BD+C
Mechanical Engineer/Senior Energy Analyst

D 206-788-4577 | O 206-285-7100
www.rushingco.com<http://www.rushingco.com/>

From: equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org> [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Behnam Jowkar
Sent: Wednesday, October 31, 2012 1:21 PM
To: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: [Equest-users] creating performance curves

Hi guys,

I'm trying to create chiller part load EIR curves based on manufacturer data. I have part load (25%, 50%, 75%, 100%) as the independent variables (X), and part load EIRs as the dependent variable (Z). The part load EIRs from manufacturer are much better than what I get when I use default EQUEST curve. But when I run the model and compare with same model with default curve, my chiller electrical energy consumption is increased significantly (with the manufacturer data). Has anyone been able to successfully create performance curves, or does anyone know of any documentation that might explain how to properly create these curves? Any help is greatly appreciated.


Regards,


Behnam


--
Behnam Jowkar, MASc
Energy Services Associate

Fluent Group Consulting Engineers Inc.
295A Broadway Avenue, Second Floor
P.O. Box 188, Orangeville, Ontario, L9W 2Z6
t 888.358.3683 x704  f 866.620.7502  c 519.938.7657
www.fluentgroup.com<http://www.fluentgroup.com>





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