Hi All,
I'm trying to model a house in Designbuilder heated through an air-source heat pump. The output I'm after is only the monthly and annual energy consumption and heating load. Does anyone know which HVAC template to use for this. I do have the Designbuilder v3 version that can do detailed HVAC but I'm not after a detailed heat pump design. Any guidance on how to model heat pumps in simple/compact HVAC in Designbuilder will be useful.
Many thanks,
Apeksha Gupta
On Wed, Sep 5, 2012 at 1:30 AM,wrote:
You can use the HVAC template in Design builder Name Packaged direct
expansion.
From: "Gupta, Apeksha" --
Kind Regards,
*Waseem Shah Khan*
Hi Apeksha,
You can model the basic characteristics of an air-source heat pump in simple
HVAC using UK NCM data. There is a simple HVAC tutorial available on
DesignBuilder's website which describes the basic set-up and features of
simple HVAC. Assuming you want heating-only:
1. Go to the HVAC tab, select 'known HVAC system' and edit the details
as below.
2. Set the system type e.g. central heating using radiators or
underfloor heating etc.
3. In the heating tab set the heat source to heat pump: air source
(note different fuel types available).
4. Input the basic performance parameters in the remaining tabs.
If you have both heating and cooling use the split or multi-split system
type and enter the heating details as above.
Regards,
David Cocking MSc CEng MCIBSE MEI
Apeksha,
Apologies for my earlier email (an early-morning response J)...I've just
realised I've been using the UK compliance version of DesignBuilder for the
last week so my response was based on the SBEM analysis interface not
EnergyPlus.
To approximately model a heat pump using Simple HVAC in DesignBuilder using
EnergyPlus as the calculation engine (the limitations of simple HVAC are
discussed in the help file and tutorial):
1. Set the closest HVAC template for the system type (under floor
heating system, radiators with natvent etc).
2. Set the auxiliary energy (or in the absence of accurate data use
the NCM auxiliary energy setting in model options to use the default NCM
value).
3. Set the heating fuel type (presumably grid electricity) and the
heating system CoP to an appropriate value.
4. Change the radiant details under the 'Type' header if necessary.
5. Modify other details on the HVAC tab as required (mechanical
ventilation, cooling, natvent etc).
I hope that helps and apologies again for any earlier confusion,
David Cocking MSc CEng MCIBSE MEI