[Equest-users] EER to EIR conversion formula source

[Daniel Knapp via Equest-users]

Keith,

The important thing to consider is that eQUEST’s definition of EER may not match the ARI-rated EER as the fan power and compressor power are usually separated in eQUEST whereas the fan power and compressor power are both included together in the ARI-ratings. This is where the more complicated conversions are coming from, as explained in detail in the RMI document linked by David.

All the best,

Daniel

—
Daniel Knapp PhD, P Phys, LEED AP
danielk at arborus.ca

Energy Efficiency Expert
Arborus Consulting
2-43 Eccles Street
Ottawa ON K1R 6S3
(613) 234-7178

> On Apr 12, 2017, at 4:43 PM, Keith Swartz via Equest-users <equest-users at lists.onebuilding.org> wrote:
> 
> EIR = 1 / COP
>  
> EIR = 3.412 / EER
>  
> EIR = (kW/ton) * (3.412/12)
>  
> Keith Swartz, PE | Senior Energy Engineer
> Seventhwave
> 608.210.7123 seventhwave.org
>  
> From: David Eldridge via Equest-users [mailto:equest-users at lists.onebuilding.org] 
> Sent: Wednesday, April 12, 2017 3:01 PM
> To: equest-users at lists.onebuilding.org
> Subject: Re: [Equest-users] EER to EIR conversion formula source
>  
> Jayant, see if this helps – search for “EIR” and the section will come up:
> http://www.rmi.org/Content/Files/EMITUsersGuide.pdf
>  
> David
>  
>                                                                                                
>  
> David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, BEAP, HBDP
> Grumman/Butkus Associates
>                                                                                                
>  
>  
> From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Jayant Patil via Equest-users
> Sent: Wednesday, April 12, 2017 2:32 PM
> To: siddharth patil <patilsiddharth5 at gmail.com>
> Cc: equest-users at lists.onebuilding.org
> Subject: Re: [Equest-users] EER to EIR conversion formula source
>  
> Thanks Siddharth,
>  
> I did browse through this link but could not find the attachment that the user had mentioned about.
>  
> I am looking for the source of the co-efficient; COOLING-EIR = (1/EER - 0.012167) / ((1 / 3.413) + 0.012167)
>  
> On Wed, Apr 12, 2017 at 12:27 PM, siddharth patil <patilsiddharth5 at gmail.com> wrote:
> Check out the link,
>  
> http://energy-models.com/forum/cooling-eir-and-unit-eer
>  
> Regards, 
> Siddharth
> 
> Siddharth S. Patil
> Mechanical Engineer(MS)
> Arizona State University,Tempe
> Email: sspatil8 at asu.edu, patilsiddharth5 at gmail.com
> Contact: +1 (480)-465-1540
>  
> On Wed, Apr 12, 2017 at 9:40 AM, Jayant Patil via Equest-users <equest-users at lists.onebuilding.org> wrote:
> Hello,
>  
> Does anybody know a source for the EER to EIR conversion formula?
>  
> Thanks
> Jay
>  
>  
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