[Equest-users] Steam loop pumping energy

[Xavier García Casals]

Steven,
The program will calculate one of the pump input parameters acording to 
the relationship between power, efficiency, head and flow. Try assigning 
an almost 0 kW power, and leave another parameter free (for example 
head) for the programe to use the formula to calculate this parameter 
instead of overriding the almost 0 kW power.

En/na Steven Savich ha escrit:
>
> David,
>
>  
>
> Tried that.  The program ignores the 0 pump power input and calculates 
> the required power, even with actual flow and head input.  PS-C report 
> still shows pump energy consumption by the heating water loop pump.
>
>  
>
> FYI I'm using eQuest ver 3-61e.  Do later or earlier versions allow 
> this 0 kW workaround?
>
>  
>
> Steven
>
>  
>
> Steven Savich
>
> Systems West Engineers
>
> 411 High Street
>
> Eugene, OR  97401-2427
>
> (541) 342-7210
>
> (541) 342-7220 (fax)
>
> ------------------------------------------------------------------------
>
> *From:* David S Eldridge [mailto:DSE at grummanbutkus.com]
> *Sent:* Tuesday, October 14, 2008 9:09 AM
> *To:* 'Steven Savich'
> *Subject:* RE: [Equest-users] Steam loop pumping energy
>
>  
>
> You can use the actual flow and head so the program doesn't crash, but 
> enter a pump power of 0 kW.  "Magic" pump motors.
>
>  
>
> *From:* equest-users-bounces at lists.onebuilding.org 
> [mailto:equest-users-bounces at lists.onebuilding.org] *On Behalf Of 
> *Steven Savich
> *Sent:* Tuesday, October 14, 2008 10:52 AM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Steam loop pumping energy
>
>  
>
> All,
>
>  
>
> I'm modeling a university campus building with heat provided by 
> central plant steam boilers, providing 15# steam.  I've done this by 
> eliminating boilers in the model and attaching a steam meter to the 
> hot water loop.
>
>  
>
> My problem is with pumping energy.  Equest requires that a pump be 
> attached to the hot water loop, but the actual installation has 
> gravity return condensate.  How do I zero out the pumping energy?  I 
> have set pump head = 0, but this gives me pages of error reports.  Any 
> other methods?
>
>  
>
> Thanks,
>
> Steven
>
>  
>
> Steven Savich
>
> Systems West Engineers
>
> 411 High Street
>
> Eugene, OR  97401-2427
>
> (541) 342-7210
>
> (541) 342-7220 (fax)
>
>  
>
> ------------------------------------------------------------------------
>
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-- 

* *

*Xavier García Casals*

 

*Sistemas** Solares, Eficiencia Energética e Ingeniería Bioclimática** *

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