[TRNSYS-users] Absorption chiller

[Hsein Moussawi]

Hi there,

Sorry for the mistake I mentioned in the previous email.

In fact, I can control the flow rate to the evaporator by installing a storage (buffer) tank and this is what I already did.

The real problem behind the negative values is the low flow rate to the generator and not the evaporator. That's what I can't control since the generator is driven by exhaust gases from certain prime mover which in turn depends on the electrical load of the building (that I can't change).

Sorry and Thanks...again!



________________________________
From: David BRADLEY <d.bradley at tess-inc.com>
Sent: Thursday, February 11, 2016 12:07 AM
To: TRNSYS users mailing list at OneBuilding.org; hsein_moussawi at hotmail.com
Subject: Re: [TRNSYS-users] Absorption chiller

Hsein,
  This would be a problem in a real system as well, not just in simulation. You need to isolate the load flow from the source flow by using either a primary/secondary pumping scheme or by putting a buffer tank between the load loop and the source loop.
kind regards,
 David


On 02/10/2016 15:38, Hsein Moussawi wrote:

Hi angel,

Yes I know how it works and the negative values mainly appear when the flow rate to the evaporator is low. However in the system I am simulating, I can't control this flow rate, it is imposed by other components (cooling load from building). So do you have other suggestions?

Thanks for the fast reply.

Regards.


________________________________
From: Angel Carrera <angel.carrera at aiguasol.coop><mailto:angel.carrera at aiguasol.coop>
Sent: Wednesday, February 10, 2016 9:28 PM
To: TRNSYS users mailing list at OneBuilding. org
Subject: Re: [TRNSYS-users] Absorption chiller


Hi,

I giess that the flowrate you are giving as an input is too low related to the power requirement at the evaporator.
I suggest you to read the descripción of the type to understand how it is working, regards

Angel

El 10/2/2016 20:14, "Hsein Moussawi" <hsein_moussawi at hotmail.com<mailto:hsein_moussawi at hotmail.com>> escribió:

Hello there,

I am using an exhaust fired absorption chiller in a certain system. After simulation the temperature of the hot fluid exiting the chiller is observed to be negative in many instances. This is impossible in reality. I am wondering if anyone faced a similar problem!?

My question is:

Is there a way by which I can limit the output of a component to a certain point?? (e.g. outlet temperature of chiller to ambient temperature)

Thanks in advance TRNSYS community,

Best regards.

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