[bldg-sim] Another DOE-2 question..

Question answered...

-----Original Message-----
From: Jeff Hirsch [mailto:Jeff.Hirsch@xxxxxxxx]
Sent: Thursday, August 07, 2003 4:17 PM
To: Aulbach, John
Subject: Re: [bldg-sim] Another DOE-2 question..

LS-F (and LS-E), you must remember, list the load components for a NET heating or cooling load;

thus a reduction of lighting load will probably cause a change in the hours of net heating and cooling

load for both the spaces and the whole building ... thus, when you then look at the occ/equ contributions

to the net load, they may change greatly even though the total occ/equ loads are very close to the same

(not exactly as we are talking about net load to the spaces when some goes out the windows and walls

via direct radiation to the surface then conduction out the other side.)

---
Jeff Hirsch
James J. Hirsch & Associates
Building Performance Analysis Software & Consulting
12185 Presilla Road
Camarillo, CA 93012-9243 USA
phone: (805) 553-9000
fax: (805) 532-2401
email: Jeff.Hirsch@xxxxxxxx
web: http://DOE2.com

----- Original Message -----

From: Aulbach, John

To: bldg-sim@xxxxxxxx

Sent: Thursday, August 07, 2003 12:40 PM

Subject: [bldg-sim] Another DOE-2 question..

By the way, I resolved my previous OSA question. Thanks to all who contributed..

Same school. A Base Case and a Retrofit Case.

Base Case is a central plant with 20 some air units, fixed economizer.

Retrofit Case are individual Air heat Pumps, WITH economizer. Also a Lighting Retrofit (same operating hours).

The LS-F report shows a DOUBLING of the contribution of Occupancy AND Equipment on the load. Same building envelope, occupancy and equipment density, same operating schedules. And the program does NOT yet know that the SYSTEM has changed.

Any ideas?

John R. Aulbach, PE, CEM

Project Engineer

Sempra Energy Solutions

555 West Fifth Street

Mail Location 27F3

Los Angeles, CA 90013

Tel: (213) 244-8551 Cell (213) 219-4875

"Sempra Energy Solutions is not the same company as SDG&E/ SoCalGas, the Utilities. Sempra Energy Solutions is not regulated by the California Public Utilities Commission, and you do not have to buy Sempra Energy Solutions products or services to continue to receive quality regulated service from the Utilities."
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