Revision history [back]

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, 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 will spec 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.

Can someone help me to solve this situation? there is another evaporative equipment i could use in openstudio?

Tank you

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, 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 will spec 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.

Can someone help me to solve this situation? there is another evaporative equipment i could use in openstudio?

Tank you

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, 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 will spec 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.

Can someone help me to solve this situation? there is another evaporative equipment i could use in openstudio?

Tank you

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 will spec 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.

Can someone help me to solve this situation? there is another evaporative equipment i could use in openstudio?

Tank you

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.

Can 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