[Bldg-sim] Thermal Storage Controls

[Eric Studer]

I get that error when I do novel things, too, and it goes away when I change
the loop sizing type from secondary (the default) to primary.  You may get a
warning afterwards that says that the loop is undersized for the connected
load.  I ignore these warnings since the loop is sized based on the primary
equipment capacity (which should be sufficient).

 

I hope this is helpful!

 

Eric

 

Ph:   (781) 431-1100 ext 12
Fax:  (781) 431-1109

 

  _____  

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Alan Jackson
Sent: Monday, August 10, 2009 4:53 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Thermal Storage Controls

 

I am modelling the cost benefits of creating chilled water/ice at night so I
have added a thermal storage tank and set up a secondary chiller and loop to
serve the storage tank. I have assigned an on/off schedule to the TES
chiller so that it operates only at night, but I have also added equipment
controls so that it has first priority for cooling. This was my initial
thought on getting it to operate at night but not during the day. I am
getting an error "Ice Water Loop has zero design flow". At first I figured
this was because I had no size for the storage tank selected so I started
off small and through a 50 ton tank in the capacity field. Still receiving
the same error. Does this have to be sized manually?

 

Here are the controls:

 

"Chiller Controls" = EQUIP-CTRL      

   TYPE             = COOLING

   CIRCULATION-LOOP = "Chilled Water Loop"

   CHILLERS-1       = ( "Ice Chiller" )

   CHILLERS-2       = ( "Air Cooled Chiller 1" )

   ..

 

and the tank

 

"Ice Storage" = THERMAL-STORAGE 

   TYPE             = COLD-WATER-TANK

   CAPACITY         = 600

   CHRG-LOOP        = "Ice Water Loop"

   CHRG-SCH         = "Ice Making Schedule Annual"

   DCHRG-LOOP       = "Chilled Water Loop"

   ..

 

 

 

Thanks in advance

 

 

 

Alan Jackson, LEEDR A.P. 

Senior Mechanical Engineer

Buro Happold Consulting Engineers, PC

100 Broadway 

New York, NY 10005

USA

 

Tel: (+1) 212 334 2025

Direct: (+1) 212 616 0267

Fax: (+1) 212 334 5528

Email: alan.jackson at burohappold.com
www.burohappold.com <http://www.burohappold.com/> 

 

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