[Bldg-sim] Thermal Storage Controls

[Alan Jackson]

Eric

 

That did the trick. Thanks for the help. And it seems I had to introduce
different controls then I was at the time in order to get the storage
tank to provide capacity to the loop at the appropriate time. For
others, this is detailed in STORE-MAX-LOAD of DOE documentation. Example
below.

 

CHILLERS-1                  = (CHLR-A,CHLR-B)
CHILLERS-SEQ-1          = (     1,     2) 
STORE-SEQ-1               = (3)



 

Thanks again

 

Alan Jackson, LEED(r) A.P. 

Senior Mechanical Engineer

Buro Happold Consulting Engineers, PC

________________________________

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Eric Studer
Sent: Tuesday, August 11, 2009 6:37 AM
To: Alan Jackson; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Thermal Storage Controls

 

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, 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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