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Evaporative direct research

asked 2016-10-27 13:13:44 -0500

HJOJOA gravatar image

updated 2016-10-27 14:19:16 -0500

Hi,

The airloop

C:\fakepath\Airloop.jpg

For an evaporative cooling air-loop (showed above) operating 24 hours at he day, using a direct evaporative cooling with 0.88 cooler effectiveness and economizer always opened, there is a problem with indoors temperatures, see the picture attached.

C:\fakepath\ZONE TEMPERATURE CURVE.jpg

Checking the nodes temperatures, i can see something strange with leaving temperatures from the air loop, see the picture below.

C:\fakepath\NODE TEMPERATURES.jpg

You can see that leaving temperatures from the cooler (node 7) dry bulb temperature is according a cooler of 0.88 effectiveness, but near to 13:00 hour, temperatures leaving the cooler are higher than outdoor wetbulb (more than 3°C) and increase over time more and more. I would expect leaving drybulb temperature from the cooler 3°C more than outdoor wet bulb, but the temperature leaving the cooler increases more and more, this situation cause the strange indoor temperatures.

I think the economizer is not working at this range of time, can someone help me to solve this situation? there is another evaporative equipment i could use in openstudio?

Tank you

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answered 2016-10-27 19:02:50 -0500

HJOJOA gravatar image

Ok, the answer is simple, when use economizer even when the principal optionis is choosen (fixed dry bulb in my case) the economizer check the enthalpy too and other options thas was my problem. Enthalpy was out of range and close the economizer.

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Asked: 2016-10-27 13:13:44 -0500

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Last updated: Oct 27 '16