Dear Rowan,
The example file “5ZoneWaterLoopHeatPump.idf”
contains a single water loop which utilizes a chiller for cooling and a boiler
for heating. It seems that you might:
·
Use the example file “as is”,
·
assign a boiler efficiency of 1.0,
·
report all Boiler energy with a Custom Meter and then
·
modify the Boiler energy using the Climaventa’s heating
efficiency / COP in a post-process calculation
p.s., I am not familiar with the chiller type you have
mentioned, so I am guessing a bit about how it functions.
The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of rowan.blakers
Sent: Sunday, July 04, 2010 10:52 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: How to model four pipe chiller with
simultaneous heating and cooling
Hello, I'm still hoping that someone can give me some
pointers to help with this one. Surely I'm not the first person to try and
simulate such a system?
Regards,
Rowan
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx,
"rowan.blakers" <rblakers@...> wrote:
>
> Hello,
>
> I'm in the process of simlulating a new office building. The HVAC system
uses a four pipe chiller to provide both chilled water and heating water. The
model is the Climaventa NECS-Q 0262. It is an air source unit capable of
simultaneus heating and cooling (in the simulataneous mode it operates much
like a water-to-water heat pump).
>
> The heating water (42 degrees celcius entering, 50 degrees leaving)
produced is supplied to in-slab heating pipework, and fan coil units. There is
also a solar thermal system providing additional water heating.
>
> The chilled water (12 degrees celcius entering, 7 degrees leaving)
supplies fan coil units only.
>
> I'm really not sure of the best way to model this type of chiller. It
seems to operate in a manner that would require an amalgamation of several of
the EnergyPlus plant models depending upon operating conditions.
>
> Do you have any suggestions about the most accurate way to simulate this
type of plant?
>
> Thankyou.
>
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