[Equest-users] HEAT-EIR-FT for heat pumps with water cooled condensers?

[Brian Fountain]

Thank you all for the replies.  I did receive a definitive answer:

 

"Entering mixed air temperature to the indoor coil(s) and entering fluid
temperature for the water side."

 

Plus, I received the excellent guidance from Aaron pointing out the
differences in the "HP- " series part load curves which are normalized on
ARI conditions and the "GSHP/WLHP- " series part load curves which are
normalized on GSHP loop conditions and require modifications to the EIR and
capacity.  The "GSHP/WLHP- " are the defaults coming out of the wizard.

 

Cheers,

 

From: Anthony Hardman [mailto:anthony at greenengineer.com] 
Sent: Monday, April 14, 2014 12:01 PM
To: 'Brian Fountain'; equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] HEAT-EIR-FT for heat pumps with water cooled
condensers?

 

Entering indoor wet bulb and entering (condenser) water temperature I
believe.

 

Anthony Hardman, PE, LEED AP BD+C

Senior Building Performance Analyst

The Green Engineer, Inc.

Sustainable Design Consulting

54 Junction Square Dr.

Concord, MA 01742

O: (978) 610-2801

C: (720) 840-7862

 

The Green Engineer, Inc. is a Certified B Corporation

 

From: Brian Fountain [mailto:bfountain at greensim.com] 
Sent: Sunday, April 13, 2014 1:21 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] HEAT-EIR-FT for heat pumps with water cooled
condensers?

 

I am modelling a building with distributed water loop heat pumps.  I am
looking at the electricity used for space heating (the compressor energy in
heating mode).   This depends on a part load curve HEAT-EIR-FT which is a
function of two temperatures.  Based on the DOE2 documentation, it is not
clear to me which two temperatures this curve is using to modify the
compressor energy for a water-cooled heat pump. 

 

For an air-cooled heat pump, the curve is a function of entering dry-bulb
temperature and outdoor dry-bulb temperature.  I want to know what the X and
Y values are for a water-cooled heat pump.

 

Can anyone provide any clarification on this?

 

Many thanks.

 

Brian

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