[BLDG-SIM] Energy losses through outside doors

[Jon Maxwell]

If you want to dust off your microfiche reader, two older articles, neither
of which is cited in the ASHRAE Fundamentals chapter, are:

"Air Infiltration Through Revolving Doors," Schutrrum, L. F., N. Ozisik, J.
T. Baker, C. M. Humphreys, No. 1760, ASHRAE Transactions Vol 67, 1961.

"Winter Infiltration Through Swinging-Door Entrances in Multi-Story
Buildings," T. C. Min, No. 1643, ASHAE Transactions, 1958.   (The professor
worked at Alabama Polytechnic Institute, since renamed).

The papers provide relationships to estimate losses as a function of number
of people per hour passing through the doors and as a function of building
height, among other things.

Jon Maxwell, PE
Aspen Systems
710 Park Place
College Station, TX 77840
(979) 764-6779


----- Original Message ----- 
From: William Bahnfleth
To: BLDG-SIM at gard.com
Sent: Thursday, May 20, 2004 3:30 PM
Subject: [BLDG-SIM] Energy losses through outside doors


...or see the ASHRAE Handbook of Fundamentals (2001), pages 26.24-26, which
summarizes the results of the same ASHRAE research project.

One of the difficulties of dealing with doors is the large difference in
leakage area between when they are open and closed and determining how much
of the time they are opened.

My first guess would be that a revolving door is easier to estimate because
there is always a seal and a relatively small amount of outside air would be
transferred by leakage or in bulk due to the rotation of the door.

Bill Bahnfleth

At 03:43 PM 5/20/2004, David Yuill wrote:

Ahmad,

A significant portion of energy loss through a door is air leakage.  I am
aware of a study that examined this issue for automatic doors:   "Air
Leakage Through Automatic Doors," G. K. Yuill, Rebecca Upham, and Chen Hui,
ASHRAE Transactions, V106, Pt 2, 2000.  This might be a starting point.

Regards,

David Yuill



-----Original Message-----
From: postman at gard.com [mailto:postman at gard.com] On Behalf Of Ahmed Fraij
Sent: Wednesday, May 19, 2004 3:08 AM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] Energy losses through outside doors

Dear All,

     I have a case in which an owner of a building needs to know which type
of outside doors will be more energy efficient (i.e. which type is more
effective to reduce the load of the Air Conditioning system).

    He asked me about three door types: Automatic sliding doors, rotating
doors and hinged doors.

   So, can anyone provide me with a method to calculate the energy losses
through each type? or is there any study that has been made for such case?

Your help will be highly appreciated

Thanks & Best Regards

Ahmad Fraij





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_________________________________________________


William P. Bahnfleth, Ph.D., P.E.
Associate Professor
Director, Indoor Environment Center

Department of Architectural Engineering
The Pennsylvania State University
104 Engineering Unit A
University Park, PA 16802 USA


voice: 814.863.2076 / fax: 814.863.4789
e-mail:  wbahnfleth at psu.edu
www.arche.psu.edu/faculty/WBahnfleth/
_________________________________________________

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