[Bldg-sim] Thermal Storage Controls

[Alan Jackson]

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, LEED(r) 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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