[BLDG-SIM] Simulating in-suite HRV's on FC type systems using eQUEST

[Aulbach, John]

Brian:
 
I was taught a trick by an old dog, Mr.. Bruce Birdsall of Lawrence Berkeley
Labs, who was in on the original creation of DOE-2. along with Fred
Winkleman, Jeff Hirsch, and Fred Buhl. HELLO to all of these people.
 
Bruce told me to use an induction system in the guest rooms (I was heavily
into Hilton Hotels at the time). Such a system allowed primary and secondary
heating and cooling coils, and by using  the bypass ratio, allowed outside
air to entrain. I don't have time to research the exact bypass ration, or
all the stuff I did (it was in DOE-2.1C version).
 
But that would allow you to use outside air with virtually a fan coil
system, either two or four pipe. Then the corridor air is on it's own loads
and system.
 
Try it.

 -----Original Message-----
From: Brian Fountain [mailto:greensim at lara.on.ca]
Sent: Wednesday, December 10, 2003 1:15 PM
To: BLDG-SIM at GARD.COM
Subject: [BLDG-SIM] Simulating in-suite HRV's on FC type systems using
eQUEST



I am using eQUEST to model a high-rise multi-unit residential building (in a
cold climate).  The mechanical system most likely for selection will include
2-pipe fan coils (with a supplementary electric coil) in the suites and a
corridor make-up air unit.  The in-suite fan coils under consideration have
an outdoor air intake and an air-to-air heat exchanger to recover heat from
the suite washroom exhaust.  This is not how the FC fan coil system is set
up in DOE 2.2 - and there is no provision for heat recovery at the fan-coil
level.  I am using the OA-FROM-SYS keyword which moves the entire
ventilation load to the corridor make-up air system where heat recovery can
be applied.  Doing this appears to greatly improve the energy performance of
the building.  I am wondering if modeling the system in this was is
over-stating performance of the heat recovery.

 

I am wondering if there is experience within the group to better model such
a system.  Any assistance would be greatly appreciated.

 

Kind regards,

 

Brian Fountain, P.Eng.

Energy Engineer

 

GreenSim

 

(905)639-6014 -- voice

(905)639-0443 -- fax

bfountain at canada.com

 



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