[Equest-users] Space Heat Output

Aulbach, John jaulbach at nexant.com
Wed Jul 30 16:05:48 PDT 2008

To simulate steam, you have to have a hot water loop with 0 kW pumping.

Also, if you really want a steam boiler..(from the DOE-2.2 Help menu..)

Takes a code-word that specifies the type of boiler. This required
keyword should be the first keyword entered. Allowed values of TYPE are:

HW-BOILER                 Hot water boiler.

HW-BOILER-W/DRAFT  Hot water boiler with draft fan.

ELEC-HW-BOILER        Electric hot water boiler.

STM-BOILER                Steam boiler.

STM-BOILER-W/DRAFT Stream boiler with draft fan.

ELEC-STM-BOILER       Electric steam boiler.

Note that the steam boilers are modeled identically to the hot water
boilers, except that their efficiencies are lower. 

-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Matthew
Sent: Wednesday, July 30, 2008 4:10 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Space Heat Output

Does anyone know why I cannot model a VAV AHU with a steam loop/boiler
for space heat?

It is a central AHU with zone boxes, therefore I am modeling (1)
Air-Side HVAC System.

When reviewing the output consumption using this configuration I do not
see any energy consumption for space heat, but when I switch to a
furnace instead of the steam I am able to produce logical /practical
consumption numbers. What am I doing wrong?

Thank you in advance.

Matthew Higgins, LEED AP
Technical Specialist
Environmental Dynamics, Inc.
Architecture and Sustainability Consulting Services

Any data provided by the Consultant, verbal or written, are to be
considered opinions of building energy and/or daylight performance. The
Client understands that the Consultant has no control of occupant
habits, equipment or material performance or characteristics, site or
climate conditions or the Contractor's method of assembly, and that the
Consultant's opinions regarding building energy/daylight performance are
made on the basis of the Consultant's professional judgment and
experience. The Consultant makes no warranty, express or implied, that
the energy/daylight performance of the building will not vary from the
Consultant's opinion of building energy/daylight performance.

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