[TRNSYS-users] type680 COP_rated

[Mehdi Shahrestani]

Dear Emilia

 

First of all, I could not find type 680 in TESS. 

Any way all the models of absorption chillers have some similar approaches.
It means that the cop exactly is the provided cooling divided by used heat. 

Please be aware that in the Qaux is not taken into account in the cop
equation (as it should not be considered based on the open literature). 

 

I checked this through the Fortran code of Types 676 to 679 and 107. You can
do the same. Also you can find it in TESS documentation related to each
type. 

But the question is still unsolved that TESS ver 17 does not have type 680!

 

Hope it helps 

Mehdi

 

  _____  

From: trnsys-users-bounces at cae.wisc.edu
[mailto:trnsys-users-bounces at cae.wisc.edu] On Behalf Of Emilia Visek
Sent: 14 September 2011 20:19
To: Ratnalee Patil
Cc: trnsys-users at cae.wisc.edu
Subject: Re: [TRNSYS-users] type680 COP_rated

 

Dear Ratnalee,

Thank you for the explanation. I believed so, but it was not clear from
TRNSYS documentation.

 

The type680 si located in HVAC TESS library under single-effect absorption
chiller hot-water fired.

 

Best regards,

Emilia Visek

On Wed, Sep 14, 2011 at 8:48 PM, Ratnalee Patil
<Ratnalee at innovativedesign.net> wrote:

Emilia,

 

For the absorption chiller models I believe the rated COP to be supplied as
a parameter is thermal COP (Qcooling output/Qheat input to generator). In
the COP output from the chiller model however, the electricity consumed by
the chiller for the operation (for pumps etc.) is taken into consideration
based on the auxiliary electric power (Qaux) supplied as one of the
parameters. Thus the output COP = Qcooling output/(Qheat input to generator
+ Qaux). 

 

By the way, where is this Type 680 located? I am aware of Types 676 to 679,
Type 681, and Type 107 for absorption chillers.

 

Thanks.

 

Regards,

Ratnalee Patil

B.Arch., M.A.Sc. Engineering

Sustainable Design Analyst

Innovative Design

850 West Morgan St.

Raleigh, NC 27603

Ph: (919) 832-6303 <tel:%28919%29%20832-6303> 

Fax: (919) 832-3339 <tel:%28919%29%20832-3339> 

 <http://www.innovativedesign.net/> www.innovativedesign.net

 

From: Emilia Visek [mailto:emilia.visek at mail.polimi.it] 
Sent: Tuesday, September 13, 2011 12:14 PM
To: trnsys-users at cae.wisc.edu
Subject: [TRNSYS-users] type680 COP_rated

 

Dear all,

The COPrated from type680, is thermal or electrical COP?

Thank you,

EV

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20110915/5147563a/attachment-0005.htm>