[bldg-sim] Simulation of Ice Storage in Equest

[Gang Wu]

David,
   
  Thank you for your input. I created a Equipment Control and put a ice-making chiller under it for ice-build specifically. Also I had another Equipment Control for discharging and chiller use. I put the two Equipment Controls under a Load Management that manages the two control scenarios using different control flags. I am not quite sure if my above practice is correct. Please advise.
   
  Thank you in advance.
   
  Glenn

David S Eldridge <DSE at grummanbutkus.com> wrote:
      Make two separate chillers, and have them scheduled for availability such that the one with the performance curves for ice is available during your ice-build times, and the "standard" performance machine is available during other times.
   
  I haven't looked at an ice-building performance curve yet, but even if the curves are similar, the EIR and capacity for the two cases will be different.
   
  Hope this helps!
   
  David
   
    --------------------------------------------------------------
  David S. Eldridge, Jr.
  Project Engineer
  LEED v2.0 Accredited Professional
  Grumman/Butkus Associates
  820 Davis St., Suite 300
  Evanston, IL  60201
  847.328.3555  ext. 224
  dse at grummanbutkus.com
  -------------------------------------------------------------


      
---------------------------------
  From: bldg-sim at gard.com [mailto:bldg-sim at gard.com] On Behalf Of Gang Wu
Sent: Sunday, December 04, 2005 8:33 PM
To: bldg-sim at gard.com
Subject: [bldg-sim] Simulation of Ice Storage in Equest


  
  Hi folks,
   
  I am simulating a partial ice-storage system using Equest. One of the 
chillers in the plant has to operate under low temperature to make ice 
during off-peak hours, while during on-peak hours it runs under high 
temperature to supply chilled water to coils. To my knowledge it shoulf 
be a dual-condition chiller, screw or centrifugal type. 
   
  I am wondering how I can model this dual-condition chiller in Equest. 
Can one performance curve represent the chiller's performance of making 
both ice and chilled water?  If my understanding is correct, each 
chiller in Equest can only be assigned with one performance curve.
   
  I highly appreciate if any expert provide some successful examples of 
both ice-storage simulation and that dual-condition chiller curve.
   
  Best,
  Glenn Wu
    
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