[TRNSYS-users] Type 668 Heat Pump Performance Issues

[knut.erik.enerstvedt at niva.no]

Fred,

Heating and cooling mode in Type 668 are 100 % independent. In heating 
mode, only the heating performance map is called. If your data file is 
correct, you should see that heat is added to the load side and drawn from 
the source side. Make sure that the cooling control signal is left to 
zero.

Best regards,
Knut Erik Enerstvedt 



From:
trnsys-users-request at cae.wisc.edu
To:
trnsys-users at cae.wisc.edu
Date:
03/09/2010 07:11 PM
Subject:
TRNSYS-users Digest, Vol 63, Issue 18








Subject:
Re: [TRNSYS-users] Type 668 Heat Pump Performance Issues
Sorry, I should have been more clear. I do have the sample catalog data 
cooling map in there, but I am wondering if the very different capacities 
are effecting the results. 

Are the heating and cooling mode calculations 100% independent, or are 
both performance maps called in the calculation?

Fred

FRED BETZ  PhD., LEED AP 
SUSTAINABLE SYSTEMS ANALYST
 
AEI | AFFILIATED ENGINEERS, INC.  
5802 Research Park Blvd. | Madison, WI  53719

P: 608.236.1175 | F: 608.238.2614  
fbetz at aeieng.com  |  www.aeieng.com  



-----Original Message-----
From: Francois Badinier [mailto:francois.badinier at icax.co.uk] 
Sent: Tuesday, March 09, 2010 11:31 AM
To: Fred Betz; trnsys-users at cae.wisc.edu
Subject: RE: [TRNSYS-users] Type 668 Heat Pump Performance Issues

Hi Fred

I don't know if it works well without a cooling map, but if you need to 
use
the heating mode only, you can use the default cooling file in the
"SampleCatalogData" folder to fill in the gap. 

Regards,

François Badinier
Development Engineer
ICAX Ltd
1 Hatfield House 
Baltic Street West
London EC1Y OST
francois.badinier at icax.co.uk
www.icax.co.uk



-----Original Message-----
From: Fred Betz [mailto:fbetz at aeieng.com] 
Sent: 09 March 2010 17:08
To: trnsys-users at cae.wisc.edu
Subject: [TRNSYS-users] Type 668 Heat Pump Performance Issues

TRNSYS Users, 

I am using a type669 heat pump in heating mode only and I have entered a
performance map for the heating side. 

If I am using type668 in a heating mode only way, do I need to input a
corresponding cooling map?

In other words, are both a heating and a cooling map required for proper
operation of a heat pump in heating only mode?

What I am seeing in my output is that the heat pump heats the load side, 
but
does not draw any heat from the source side. 

Please advise,

Fred

FRED BETZ  PhD., LEED AP 
SUSTAINABLE SYSTEMS ANALYST
 
AEI | AFFILIATED ENGINEERS, INC.  
5802 Research Park Blvd. | Madison, WI  53719

P: 608.236.1175 | F: 608.238.2614  
fbetz at aeieng.com  |  www.aeieng.com  



_______________________________________________



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