[Equest-users] Gas heat Pump 4 pipe

[Albert Artús]

Thanks Nick,

I think that e-quest doesn't allow modeling a 4 pipe air condensed heat pump, so I'm separating the cooling and heating into a electric screw and a boiler respectively. What do you think about this?

I agree with you that the best way to convert electricity into gas energy is through meter rates.

 

Albert

 

De: Nick Caton [mailto:ncaton at smithboucher.com] 
Enviado el: 03 December 2009 16:38
Para: Albert Artús; eQuest Forum
Asunto: RE: [Equest-users] Gas heat Pump 4 pipe

 

Albert,

 

This is a much more clear explanation, thanks!  I'm copying this to the mailing list to seek others' input.   There may be a more time-effective way to do this and I have never personally modeled this specific class of equipment.  

 

I'm not certain if this is feasible or not, but I might explore the possibility of treating this like an ordinary electric 4-pipe system, but to tie the electric energy use of this equipment to a separate electric utility meter within the program.  Then, set that meter's rates to match your equivalent gas rates for the same energy.  Conceptually this seems simpler than equating a coordinated boiler/chiller to your equipment, but I don't know whether this might cause different troubles when it comes to nailing down the performance curves...

 

Any thoughts from the rest of us?

 

~Nick

 

 

NICK CATON, E.I.T.

PROJECT ENGINEER

25501 west valley parkway

olathe ks 66061

direct 913 344.0036

fax 913 345.0617

Check out our new web-site @ www.smithboucher.com 

 

From: Albert Artús [mailto:aal at grupojg.com] 
Sent: Thursday, December 03, 2009 2:43 AM
To: Nick Caton
Subject: RE: [Equest-users] Gas heat Pump 4 pipe

 

Hi Nick!

My apologies for my inexact explanation.

I am talking about a 4 pipe heat pump (providing chilled water and hot water into separate chilled loop and hot loop respectively) that works with gas instead of electricity. Moreover, it's air condensed.

I am thinking of modeling it with and electric screw chiller and a boiler separately. In this case, I would have to convert chiller electricity's energy consumption into gas energy consumption in order to justify LEED energy credit. How would that be done?

 

Any other suggestion will be welcome.

Thanks very much,

 

Albert

 

De: Nick Caton [mailto:ncaton at smithboucher.com] 
Enviado el: 02 December 2009 20:51
Para: Albert Artús
Asunto: RE: [Equest-users] Gas heat Pump 4 pipe

 

Hi Albert!

 

Perhaps I'm one of a few, but I am not sure of what exactly you are asking about...

 

"heat pump" - equipment that transfers heat 

"loop to loop" - Implies two liquid fluid loops

 

However,

"air cooled gas heat" - sounds like you mean separate equipment that is heating/cooling one or both of the loops?

 

It sounds like a terminology thing, but it might be helpful to re-state your question more fully describing which specific equipment you are having trouble deciding how to model...

 

~Nick

 



 

NICK CATON, E.I.T.

PROJECT ENGINEER

25501 west valley parkway

olathe ks 66061

direct 913 344.0036

fax 913 345.0617

Check out our new web-site @ www.smithboucher.com 

 

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Albert Artús
Sent: Wednesday, December 02, 2009 11:09 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Gas heat Pump 4 pipe

 

Dear equesters,

 

Does anybody know how to model a loop to loop air cooled gas heat pump?

 

Thanks!

 

Albert

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