[Equest-users] Fully Variable Frequency System Modeling

[YinRic]

Thanks Bill. The actual overall window-facade ratio is as high as 66%. The owner targeted a 500lx artificial lighting level in office area without considering natural lighting. I already advised considering daylighting especially since most of the rooms start working at 9am and close at 5pm. Since this office building (over 50,000 sqm) will be open for rent, owner is still hesitate with daylighting sensor installation, because companies which rent the building may not like such sensors...

 

Rick

 


Subject: RE: [Equest-users] Fully Variable Frequency System Modeling
Date: Fri, 17 Jul 2009 08:54:16 -0400
From: bbishop at PathfinderEngineers.com
To: cesseric at hotmail.com









Rick,
 
I agree with Cam regarding the windows. I also suggest that you recommend advanced lighting techniques to the owner/architect/designers. It would be silly to have so much glass in a building and not make use of reduced lighting levels and daylighting controls.
 
Bill
 

William Bishop, EIT, LEED® AP | Pathfinder Engineers & Architects LLP
Mechanical Engineer
 
134 South Fitzhugh Street
Rochester, NY 14608
T: (585) 325-6004 Ext. 114
F: (585) 325-6005
bbishop at pathfinderengineers.com
www.pathfinderengineers.com
P Please strive to live sustainably.




From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of YinRic
Sent: Thursday, July 16, 2009 10:05 PM
To: cam at energyopportunities.com; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Fully Variable Frequency System Modeling
 
Hi Cam,
 
Your warning helps. I aware the difficulty and will for sure advice the owner to invest more in good windows and frames. Thanks!
 
Best Regards,
Rick, PE, LEED AP
 



From: cam at energyopportunities.com
To: cesseric at hotmail.com
Subject: RE: [SPAM] [Equest-users] Fully Variable Frequency System Modeling
Date: Thu, 16 Jul 2009 07:54:13 -0400

Rick:
 
Afraid I can’t exactly help, but I do have a warning.  Appendix G (assuming you are LEED-NC v2.2 or later) requires that the baseline building be modeled with no more than 40% vertical fenestration.  It is likely you will need more sophisticated strategies (chilled beam, for instance) to achieve the minimum 14% (2 points) cost savings.  It would seem crucial that the project invest in good windows, especially the frames!  Good luck …
 

Cam S. Fitzgerald, PE, LEED AP
 
Energy Opportunities, LLC
a 7group company
phone:  (717) 292-2636 x11
fax:  (717) 292-0585
e-mail:  fitzgerald at sevengroup.com
 


From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of YinRic
Sent: Wednesday, July 15, 2009 10:47 PM
To: equest-users at lists.onebuilding.org
Subject: [SPAM] [Equest-users] Fully Variable Frequency System Modeling
 
Hi, 
 
Could anyone kindly help me to make some sense about how to model fully variable frequency air-conditioning system? In this system, most of the components on the water side are fully variable, including chiller, pump and cooling tower. These components work together to make the system operate under "optimized" condition. This is gonna be a LEED project...The envelope is poor, full glass curtain. Lighting system does not have better energy performance compared with the Baseline either. Some "advanced techniques" must be figured out on HVAC side...
 
Any comments are appreciated. 
 
Best Regards,
Rick, PE, LEED AP



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