[TRNSYS-users] Type 2b Issue

[Adeel Waqas]

Dear Trnsys users



I facing problem while using controller Type 2b between solar water heater
and storage tank. i have spent several hours in understanding its behavior
but still i am confused.

Issue is i have connected the *"upper Input temperature"* as collector
outlet and *"lower Input temperature"* as outlet from storage tank heat
exchanger.

I have set the *deltaTH=10* and *delta TL= 2* as i want that controller
switch keep the pump on between this two limits.



But when u exported the TRNSyS data to excel to check the result it is
noticed that sometimes pump is off even the above mentioned limit (deltaTH=10
and delta TL= 2) is satisfied. I am attaching the excel file and issue is
highlighted in this file (sheet 1). Also TRNSYS file is attached



I will be thanks for the help and the suggestion and to know where I am
wrong.



Regards
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