Re: [TRNSYS-users] Problem simulating evaporative cooling

I don't think that there is anything wrong with your simulation. There is a slight difference in the humidity ratio of your supply air and your zone, which you can see if you change the scale on the plot. I think the reason that they are so close is that you are supplying quite a bit of air to the house (26 air changes per hour). If you reduce the air flow through the evaporative cooler, you will see the difference between the supply air humidity ratio and the house humidity ratio increase.

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----- Original Message -----
Subject: [TRNSYS-users] Problem simulating evaporative cooling
From: "Ricardo Gallegos" <ricardogallegoso@gmail.com>
Date: Mon, April 7, 2008 11:20

Dear all,
I am simulating a simple system consisting of an evaporative cooler connected to a house, but the humidity ratio of the outlet air from the cooler is the same than that inside the house. This does not make much sense to me for as I see the situation the air from the cooler mixes with the air inside the house ( at a differnet humidity ratio) and as a result the humidity ratio should be different. Temperatures of the air from the cooler and inside the house are, as expected, different. Is this a problem in how the Type 65a models the exchange of air, or there is something I am not considering?
Regards and thanks for any advice on this.
I attach my studio file as well as my Building and weather files.
Ricardo Gallegos
Universidad Autonoma de Baja California.
Mexicali, Mexico

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