Re: [EnergyPlus_Support] Re: Need help for Naturally Ventilated Model

In that case, your approach is acceptable. You should compare two models with as many of the parameters kept the same as possible and change only those of interest so that you can find clear trends from your studies. Whether the ACH is 3 or 1 does not impact the trends so much. You could do a simple sensitivity study to check. Make sure to evaluate the trends and not the absolute values. For example at 3 ACH, an absolute value would be that building 1 uses 152365 GJ of energy per year and building 2 124589 GJ. The trend is that building 1 uses 152365/124589x100 percent more than building 2. When you change the ACH you will find the GJ changing a lot but the % relative to each other not so much (at least if you keep the same zone setpoints maintained in both models).

Part of the challange is thinking about what you want to investigate and setting up an appropriate test.

2016-12-08 17:55 GMT+01:00 bhavana patil ana5patil@xxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx>:

Â

Hi,
My study is about building materials. I am considering few building blocks made up of different roof and wall materials.Â
and want to find the best thermal behavior of the building block among all these blocks.Â
Please suggest me the appropriate method for natural ventilation. I will really appreciate if you suggest me a good resource.
Thanks in advance.

From: "Jean Marais jeannieboef@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@yahoogroups.com>
To: "EnergyPlus_Support@yahoogroups.com" <EnergyPlus_Support@yahoogroups.com>
Sent: Thursday, December 8, 2016 7:48 PM
Subject: Re: [EnergyPlus_Support] Re: Need help for Naturally Ventilated Model

Â

I would interject to say that most air change from window ventilation is wind pressure driven, not buoyancy driven. Your modelling approach depends on your objectives.

2016-12-08 11:26 GMT+01:00 allinson_louis@xxxxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@yahoogroups.com>:

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