[esp-r] Re: air flow network

[Ferguson, Alex]

Hi Arianna,

You can use AIM-2 with attached housing provided the ELA or ACH data has been either a) collected with the entire building depressurized, or b) the leakage values have been adjusted to reflect air movement through party walls. Adjust the 'leakage distribution' in the AIM-2 file as follows:

[cid:image001.jpg at 01CEECEE.5BDFAC80]
- Alex

From: Arianna Sdei [mailto:A.Sdei at brighton.ac.uk]
Sent: November 29, 2013 10:05
To: Ferguson, Alex; esp-r at lists.strath.ac.uk
Subject: RE: air flow network

Hi Alex,

thank you very much, that sounds very useful, however at the moment I am modelling some end of terrace and mid terrace houses while  AIM2 can be used only for detached houses, isn't it?

Arianna

From: Ferguson, Alex [mailto:Alex.Ferguson at NRCan-RNCan.gc.ca]
Sent: 29 November 2013 14:51
To: Arianna Sdei; esp-r at lists.strath.ac.uk<mailto:esp-r at lists.strath.ac.uk>
Subject: RE: air flow network

Hi Arianna,

If your goal is merely to characterize energy loss from infiltration in a single house, you may find the AIM2 model is easier-to-use and more accurate than a flow network.

Info on configuration & theoretical basis: https://espr.trac.cvsdude.com/esp-r/wiki/EmpiricalAirInfiltrationModel

- Alex


From: esp-r-bounces at lists.strath.ac.uk<mailto:esp-r-bounces at lists.strath.ac.uk> [mailto:esp-r-bounces at lists.strath.ac.uk] On Behalf Of Arianna Sdei
Sent: November 28, 2013 14:37
To: esp-r at lists.strath.ac.uk<mailto:esp-r at lists.strath.ac.uk>
Subject: [esp-r] air flow network

Dear ESP-r community,

I am trying to set up an air flow network using the measured air flow rate from pressure tests. To do that I am substituting power law flow components to cracks. I have calculated the coefficient a in the equation : Q = a dP ^b using the measured ACH and I am using b=0.66 but when simulating I get a too high heating load (over 30000 kWh/year for a single storey house) . Does anybody know why this happens and if there is another way to use the measured ACH from the pressure tests to set up the infiltration rate using an air flow network? Thank you

Regards,

Arianna

Arianna Sdei

Research Fellow IFORE (Innovation For Renewal)

UNIVERSITY OF BRIGHTON

Moulsecoomb, Lewes Road, Brighton, BN2 4AT

direct line: 0044 (0)2036747268

mobile: 0044 (0)7981739024



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