I've created a simple model of a three bedroom house for the purposes of my dissertation and the aim is to compare different fabric types and buildups to see the effect on the heating load. I am assuming that there is no auxillary heat input, but I would like the model to take into accout that there is mechanical ventilation with heat recovery. What is the simplest & best way of inputting this into the model? I am using version 5.9.
Thanks
Modelling a simple MVHR system
Re: Modelling a simple MVHR system
hey... what options have you tried so far? I don't want to go over ground you have trod on already.
Are you wanting to use or avoid the detailed HVAC?
Your tutors will have their opinion - what're they sayin'?
Are you wanting to use or avoid the detailed HVAC?
Your tutors will have their opinion - what're they sayin'?
Re: Modelling a simple MVHR system
I'm wanting to avoid the detailed HVAC. I think it's important that my simulation takes into account that the heat in the air is recovered, but I dont know enough about the specifics of the MVHR I'd be using to input it in a detailed manor. I havent tried putting it in yet so you wouldnt be covering old ground, I'm wondering if it can be done with an auxillary ventilation input in the air exchanges template manager? (and change the adjacent condition?) I'm a bit out of my depth here as I have only modelled naturally ventilated buildings before, so any help at all would be much appreciated!
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electromechanics
- VE Beginner
- Posts: 18
- Joined: Mon Feb 11, 2013 3:22 pm
Re: Modelling a simple MVHR system
Hi Guys,
Did you ever come up with a method to do this?
I am in the very same situation.
Kind regards,
Alan C
Did you ever come up with a method to do this?
I am in the very same situation.
Kind regards,
Alan C
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Complex Potential
- VE Expert
- Posts: 467
- Joined: Wed Jan 09, 2013 11:57 am
- Location: Bristol, UK
Re: Modelling a simple MVHR system
I have found two simplified ways of doing this without HVAC.
The first is that you set up and assign a system type through Apache and set the heat recovery % via the ventilation tab of the system menu. In Vista you can then check the aux vent load for the room and compare it against a hand calc for a given instant in time to check that it is being account for.
The other method is that you apply a profile to the adjacent condition (ie supply temperature) of the aux vent in the air exchanges tab which has both outside and inside air temperatures as variables and mimics the heat recovery mechanic. This requires a bit of knowledge about writing your own profiles in equation form.
The first is that you set up and assign a system type through Apache and set the heat recovery % via the ventilation tab of the system menu. In Vista you can then check the aux vent load for the room and compare it against a hand calc for a given instant in time to check that it is being account for.
The other method is that you apply a profile to the adjacent condition (ie supply temperature) of the aux vent in the air exchanges tab which has both outside and inside air temperatures as variables and mimics the heat recovery mechanic. This requires a bit of knowledge about writing your own profiles in equation form.