[TRNSYS-users] Type 510 cooling tower -Fan control signal error

4 posts / 0 new
Last post

Idris,
The design outlet fluid temperature is the outlet fluid temperature
that you would get if all the inlet conditions were at the design
condition. The design outlet fluid temperature is not a "set point"
temperature that the tower is trying to achieve. If you are trying to
achieve a certain outlet temperature then you have to set that
temperature as the 8th input and you have to set the fan control signal
(input 7) to -1 (as it says in the "more" buttons for the Type). If you
are not trying to control the outlet liquid temperature but just want it
to be closer to the wetbulb temperature then you have to increase the
air flow rate that the fans are providing.
regards,
David

David BRADLEY2's picture
Offline
Joined: 2011-10-02
Reputation: 0

David,

Thank you. Yes,I am trying to achieve an outlet temperature set at 8th input and I did set the fan control signal (input 7) to -1 but, the outlet water temperature is still higher than the desired outlet temperature.For example,the desired outlet temperature was set at 24C as the 8th input, but the outlet fluid temperature was 29C. What is the reason for not achieving the desired outlet fluid temperature?

Regards

Idris

Shofolahan, Idris Adewale's picture
Joined: 2016-04-05
Reputation: 0

Idris,
There are numerous reasons why this might happen. As I mentioned in a
previous mail if the current ambient wetbulb temperature is higher than
your desired outlet temperature then the desired outlet temperature
cannot be achieved. When I mentioned it before it was in the context of
the design condition not in the context of the current conditions but
the same physics applies. If you are unable to determine the cause of
the behavior then I would recommend that you send your project to your
distributor for assistance.
regards,
David

David BRADLEY2's picture
Offline
Joined: 2011-10-02
Reputation: 0

David,

Thank you for your feedback.I am grateful.

Regards

Idris

Shofolahan, Idris Adewale's picture
Joined: 2016-04-05
Reputation: 0