Re: [EnergyPlus_Support] Plant-condenser control problem

["Michael J. Witte" <mjwitte@xxxxxxxx>]

No, there should only be one COOLING LOAD RANGE BASED OPERATION object which 
references three PLANT EQUIPMENT LIST objects.  In the COOLING LOAD RANGE BASED 
OPERATION object, the load range limits should be:

Load Range Lower Limit 1 = 0
Load Range Upper Limit 1 = little chiller capacity

Load Range Lower Limit 2 = little chiller capacity
Load Range Upper Limit 2 = bigger chiller capacity

Load Range Lower Limit 3 = bigger chiller capacity
Load Range Upper Limit 3 = 999999999999999 (or something significantly larger 
than the sum of the two chiller capacities)

(Sorry this got missed until now.)

Mike


On 21 Dec 2006 at 5:46, olifpp wrote:

> Hi all: I have a problem with the chillers control, we set up two 
> chillers totally, and there are three operation schemes: 
> scheme1: only the little chiller runs when the demand load is small;
>  scheme2: the bigger one begins to run as the demand load becomes 
> enough large;
> scheme3: the little chiller and the bigger one run together when the 
> demand load becomes more;
> The problem is that how to set up the value in the COOLING LOAD 
> RANGE BASED THE OPERATION?  What is meaning of the Load Range Lower 
> Limit 1 and the Load Range Upper Limit 1 values?
> 1.	for scheme 1, is Load Range Lower Limit 1 is equal to zero? 
> And is Load Range Upper Limit 1 equal to the nominal capacity of the 
> little chiller?
> 2.	for scheme 2, is Load Range Lower Limit 1 equal to the 
> nominal capacity of the little chiller? And the Load Range Upper 
> Limit 1 equal to the nominal capacity of the bigger chiller?
> 3.	for scheme 3, is Load Range Lower Limit 1 equal to the 
> nominal capacity of the bigger chiller? And the Load Range Upper 
> Limit 1 equal to the sum of the bigger chiller nominal capacity and 
> the little chiller nominal capacity?
> 
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.
> 
> EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf and press the "search" button.
>  
> Yahoo! Groups Links
> 
> 
> 
> 
> 


========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx





The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf and press the "search" button.
 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    mailto:EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/