[Equest-users] Fuid-cooler has zero design flow

[Miller, Jessica]

Thanks for responding Pasha.  Yes-unfortunately it is a limitation of
eQUEST as mentioned in the manuals.  I have a few other options I am
going to try but am doing a bit more reading up to see what makes sense.

 

From: Pasha Korber-Gonzalez [mailto:pasha.pkconsulting at gmail.com] 
Sent: Wednesday, September 19, 2012 3:01 PM
To: Miller, Jessica
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Fuid-cooler has zero design flow

 

You might not be able to link these items together (restriction of
DOE-2), you should look in the DOE-2 manuals (Volume 2) under heat
rejection equipment and see if this equipment piece will connect to a
WLHP...sometime there are little details that DOE-2 won't let happen
exactly as you want it.

 

Hope this helps you a little.

 

Pasha

On Mon, Sep 17, 2012 at 9:24 AM, Miller, Jessica <JMiller at trojb.com>
wrote:

I am trying to attach a heat-rejection fluid-cooler to a WLHP
circulation-loop but my simulation keeps crashing out at 18% and I get
an error:

 

Loop:  FC Water Loop CL 1 has zero design flow.  Check input for
consistency, or specify design loads.  Does anyone know what I might be
doing wrong?

 

Thank you!

 

 

I set the following properties:

 

"FC Loop Pump 1 CL" = PUMP            

   ..

 

"CL Grnd Loop 1" = CIRCULATION-LOOP

   TYPE             = LAKE/WELL

   LOOP-DESIGN-DT   = 10

   MIN-RESET-T      = 65

   ..

 

"FC Water Loop CL 1" = CIRCULATION-LOOP

   TYPE             = WLHP

   SUBTYPE          = SECONDARY

   PRIMARY-LOOP     = "CL Grnd Loop 1"

   LOOP-OPERATION   = STANDBY

   DESIGN-HEAT-T    = 70

   DESIGN-COOL-T    = 85

   COOL-SETPT-CTRL  = FIXED

   LOOP-PUMP        = "FC Loop Pump 1 CL"

   ..

 

SET-DEFAULT FOR HEAT-REJECTION  

   TYPE = FLUID-COOLER

   CAPACITY         = 1.2863e+006

   NUMBER-OF-CELLS  = 1

   CAPACITY-CTRL    = VARIABLE-SPEED-FAN

   COIL-LOSS        = 252900

   DESIGN-APPROACH  = 7

   DESIGN-WETBULB   = 78

   CW-STATIC-HEAD   = 0

   CW-FLOW-CTRL     = VARIABLE-FLOW

   SPRAY-KW/CELL    = 2.2371

   ..

 

"WLHP Fluid Cooler 1" = HEAT-REJECTION  

   TYPE             = FLUID-COOLER

   CW-LOOP          = "FC Water Loop CL 1"

   ..

 

Jessica K. Miller, EIT, LEED(r) AP

Associate

HVAC Engineering


TRO Jung|Brannen
22 Boston Wharf Road
Boston, Massachusetts  02210

t     617.502.3400
f     617.502.3401

www.trojungbrannen.com

 


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