[Equest-users] Gated Community & Roof reflectivity (UNCLASSIFIED)

[Eurek, John S NWO]

Classification: UNCLASSIFIED
Caveats: NONE

Consider you have 2 rooms, 1 room has 20 people for 1 hour a day, the other room has 1 person all day.  If you select 1 piece of equipment using auto sizing, the equipment will make the 21 people comfortable for the one hour.  The autosizing sizing is for the design condition.

Since the auto sizing balances for the case of 20 in one room and 1 in the other.  When there are 0 people in 1 room and 1 in the other, you will likely get unmet load hours.

This is one of the many many many cases that cause unmet load hours, but a quick explanation of why you get unmet load hours using autosizing.

Autosizing = design case for the worst hour
Unmet load hours = does it work for the rest of the 8759 hours


John Eurek




-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Yusuf Turab
Sent: Tuesday, April 10, 2012 1:53 PM
To: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Gated Community & Roof reflectivity

Hello Group


*	Why do I get unmet hours even when I select the auto size option in the HVAC system? What is the point of auto sizing?
	
*	Is there a way to simulate all 4 orientations and get an average result for the base case?

Thanks


Yusuf Turab
IGBC Accredited Professional, LEED Green Associate & GRIHA Trainer Y T Enterprises
18 A, Hamsa Layout | R.S Puram | Coimbatore - 641002

http://www.ytenterprises.com/

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On 10 April 2012 00:54, Yusuf Turab <yusuf at ytenterprises.com> wrote:


	Hello Group
	
	             I have just started working on my first energy modeling project. I have two questions:
	

	*	How do I model roof reflectivity. I want to model a roof of 4 inch concrete with 1 inch stucco at the bottom and top and cover the roof with cool roof tiles. I am not sure how I can account for the energy efficiency gains compared to base case through a high SRI roof.
	*	I am trying to model a large gated community with 330 villas and 7 other common buildings. As someone suggested on this group I am modeling each building type separately and using excel to come up with a total energy usage. But I am not sure how to model the street lighting and landscape lighting at the exteriors. We plan to use solar street lights and I want to demonstrate the savings through use of solar energy.

	Many Thanks
	 
	Yusuf Turab
	
	
	
	
	On 10 April 2012 00:32, nirupama lakshminarasimhan <nirupamalnarasimhan at gmail.com> wrote:
	

		I am modeling a big public school with a lot of systems and custom windows. The equest file we have right now is taking too long to load. I've tried opening it from different locations- the default equest project folder on C: , the public server, external HDD, etc. It is just too slow in "importing project data" when it opens. The last time this happened, it was taking too long to load the BDL file and I ended up deleting a host of systems and starting from scratch. All my files- the .inp, .pd2, etc are in the same path. I just cannot get it to work faster. I'm trying to calibrate the model and it is an awfully long wait for each simulation. Does someone have any thoughts on how I could get this to work faster? 

		 

		Thank you.

		Nirupama


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Classification: UNCLASSIFIED
Caveats: NONE