[Equest-users] Equipment to space heat gain in building peak loads

zhouzarah zarahzhou at hotmail.com
Thu Jan 22 19:23:26 PST 2015


Thanks for the comments! I did not use the design day, so I just have one LS-C report based on  the weather data. I guess eQUEST uses the minimal internal loads and neglects the schedules to calculate the peak heating loads.
 
Zarah
 
From: bfountain at greensim.com
To: zarahzhou at hotmail.com; equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] Equipment to space heat gain in building peak loads
Date: Thu, 22 Jan 2015 08:24:47 -0500

If you have defined a heating design day then there will be 2 LS-C reports in the .sim file ¨C one for the peak heating day (for LOADS) in the weather and the other for the Design Day defined.  The LS-C for the design day will use the schedule for heating design day which typically (but not necessarily) includes minimal or no internal loads in order to size heating without the contributions of lighting and equipment internal gains.  Is it possible you are looking at the design day LS-C with the reduced schedule applied for the equipment load? From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of zhouzarah
Sent: January-21-15 11:30 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Equipment to space heat gain in building peak loads Hi,
 
I have a question on how eQUEST calculates the equipment heat gain in building peak cooling and heating loads. 
 
The equipemnt power density is 0.75w/ft2, schedule is 1 for 24/7, including heating and cooling design day, and the equipment heat gain ratio is set as 0.36.  
 
According to the simulation results in report LS-C, the equipemnt load is correct on peak cooling hour. However, for the peak heating hour, equipment heat gain is very small, only half of the peak cooling hour. I am confused about this, because I thought with the constant schedule, the heat gain from the equipment should be the same throughout the year.  If I set the parameters correct, is this coming from the calculation method in eQUEST? Any comment is appreciated!
 
Regards,
 
Zarah 		 	   		  
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