Re: [TRNSYS-users] I: type 73 and 2b

[David Bradley <bradley@tess-inc.com>]

Carolina,
 Type2 models a controller that only has an ON and and OFF position. As soon as the pump turns on, it outputs its full flow. If you need a pump whose flow will vary, you need to use a controller (or an equation) that generates a signal between 0 and 1 that is proportional to the speed at which you want to run the pump.
Kind regards,
 David


Carolina Belli wrote:

Hi,I’m a new user of TRNSYS, for my thesis

 

I have to simulate a solar desalination plant. For the solar collector I use type 73 (flate plate), but I have a problem with the value of the T out: it reach above 100°C.

The solar circuit is: flat plate collector (type 73) – storage tank (type 4e) – single variable pump. There is also a controller (type 2b) to control the on/off of the pump. I connect the Th of type 2b with Tout of the collector, and Tl of type 2b with the Tout of the storage tank. The problem is when the pump have to start or to stop: the flow rate rapidly increase/ decrease from 0 to the set value (and vice versa).

I try to decrease the flow through the collector but I can’t manage to solve the problem of the Tout of the panel.  

 

With many thanks,

 

Carolina

 

 

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