[TRNSYS-users] Infiltration and ventilation

[ali shahrouzian]

Dear all TRNSYS users,

Hi,

I have some issues about determining infiltration and ventilation rates of
a residential building.



I am modeling a single-family residential building in TRNSYS using Type 56.
I have divided it into four thermal zones: 1) basement 2) main floor,
including two zones, and 3) Attic. I am going to satisfy building heating
and cooling loads by the usage of an AHU system. So, to estimate the
capacity of the system, firstly, I need to determine the rates of
infiltration and ventilation of the building.



To determine the minimum ventilation rate in each thermal zone:

1-     I am wondering whether I should use the equation written in Ashrae
standard 62.2 or Ashrae standard 62.1? I mean:   Q(cfm) = *0.03**building
area+*7.5**number of people [Ashrae* 62.2*]  or   Q(cfm) = *0.06**building
area+*5**number of people [Ashrae* 62.1*]

2-     Am I permitted to use these equations to estimate the ventilation
rate of each thermal zone individually? Or they are only applied to
determine the ventilation rate of the whole-building.

3-     Is the ventilation rate estimated using these equations included
exhausted rates of bathroom(s) and restroom(s)? or do I have to add the
exhausted rates to the Q(cfm) obtained from the above equations?



As for infiltration:

4-     If the building's effective leakage area or the quantity of building
airtightness is known, how can I specify the value of infiltration rate of
each thermal zone in the building?

5-     There are two approaches in Ashrae fundamental (Chapter 16) to
determine building infiltration rate, called: 1) basic and 2) enhanced
models, which are suitable for single zone buildings. Given my building
consists of 4 thermal zones, Am I permitted to use these methods to
estimate the infiltration rate of each thermal zone?

6-     Without knowing the building's effective leakage area or the
quantity of building airtightness, how can I determine the infiltration
rate of the building? Are there any equations in this case?



I would appreciate it if you could help me in these cases.



Best regards,

Ali
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20221102/cef91b32/attachment.htm>