[bldg-sim] ASHRAE system and fuel comparisons

[Larry Degelman]

My inputs:

Using the ECB Method, the budget building does not take credit for
site-recovered energy, but your proposed design building does.

Provisions:
1.  The design energy cost and energy cost budget shall be calculated using:
(a) the same simulation program, (b) the same weather data, and (c) the same
purchased energy rates.

2.  Where on-site renewable or site-recovered sources are used, the budget
building design shall be based on the energy source used as the backup
energy source or electricity if no backup energy source has been specified.

3.  The type of HVAC system (for both the proposed design and the budget
building) is mapped on a 1-to-1 correspondence with one of the 11 HVAC
systems in Fig. 11.3.2 (HVAC Systems Map.)

4.  Lastly, when you do an HVAC design, the HVAC model used in your proposed
design has to be consistent with your design documents.  The budget building
HVAC system has to follow Fig. 11.3.2 and the dozen or so accompanying
notes.

===================================== 
Larry O. Degelman, P.E.                  ldegelman at cox.net 
Prof. Emeritus of Architecture    Ph./Fax: 1-979-696-2506
Texas A&M University
2206 Quail Run 
College Station, TX 77845
Ener-Win site: http://members.cox.net/enerwin 
=====================================
 

-----Original Message-----
From: bldg-sim at gard.com [mailto:bldg-sim at gard.com] On Behalf Of Gerald Pde
Sent: Wednesday, September 21, 2005 2:49 PM
To: bldg-sim at gard.com
Subject: [bldg-sim] ASHRAE system and fuel comparisons

Hi all,
I have a general ASHRAE question. From my
understanding, ASHRAE 90.1 does not allow comparison
of buildings with different system types or different
fuel types.

If this is true, then can a base case model with a
gas-fired absorption chiller be compared with an
absorption chiller that utilizes waste heat? If so,
then can one take credit for the reduction in energy
cost from the former to latter system?

Thanks in advance for your input.
Gerald Pde



		
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