[Bldg-sim] Appendix G Baseline Systems

Robby Oylear robbyo at rushingco.com
Mon Mar 9 09:11:51 PDT 2009


I believe you are correct.  This is how we have always modeled that type
of BL system.  The heat pumps use electricity to extract heat from the
loop, but the actual heating source is the gas-fired boiler.

Robby Oylear, LEED® AP
Mechanical Engineer
direct: 206.788.4571
cell: 206.354.2721
www.rushingco.com

-----Original Message-----
From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Mark Sorensen
Sent: Monday, March 09, 2009 9:09 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Appendix G Baseline Systems

Greetings All,

I have the following question regarding ASHRAE 90.1 Appendix G baseline
systems; For a building with proposed electric water source heat pumps
utilizing a building loop tempered by a natural gas fired boiler (during
the heating season) would the correct baseline heating type be fossil
fuel or electric?

Mark Sorensen
Diversified Energy Services
mark at denergyservices.com

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