[esp-r] Re: Blower door test

[Jon Hand]

A question about a virtual blower door model.  There are two general
approaches.  Both assume that you have distributed mass flow cracks around the
facade and have openings between rooms:

a) Set all internal zones to fixed 50 Pa and boundary notes to fixed 0 Pa.
    This assumes that a blower door test raises the internal pressure to 
    50 Pa uni-formally in all zones.

b) Don't bother setting specific pressures at boundary nodes or
zone nodes except at the single boundary node that represents the blower door - it
should be a fixed pressure 50 Pa.  

To explore the impact of cracks some people create a simple mode with
one zone with volume equal to the whole building and then add crack components
around the facade surfaces and ensure that the blower door is represented
as a fixed pressure.  Run this and see what the reported flow is. Adjust the
length or width of the cracks and run again until it is close to the blower test.

Regards, Jon Hand
________________________________________
From: esp-r-bounces at lists.strath.ac.uk [esp-r-bounces at lists.strath.ac.uk] on behalf of amisz22 [amisz22 at op.pl]
Sent: 08 March 2016 19:00
To: esp-r at lists.strath.ac.uk
Subject: [esp-r]  Blower door test

Dear Users,



I made a model (in ESR-u) of the building for which I have already done a blower door test.

I would like to carry out simulations leak test in the ESR-u.

Surrounding the building is described as follows: boundary known at 0 Pa pressure difference.

The interior of the building is described as: internal known.

On the basis of thermal images I have called the approximate size of the holes in the external walls.

Did I make the correct action?

What steps should be taken next?



Best regards,

Artur

amisz22 at op.pl