[TRNSYS-users] what is the upper dead band in controller ?

[ahmad abbasian via TRNSYS-users]

Dear Ieen

I know than when the difference of Th and Tl is lower than "Lower dead band" controller sends a control signal. For example, in the following picture which is a differential controller, if the difference of Th and Tl is lower than 2 , the controller will send the control signal to turn off pump. But when the difference is higher than 5 (Upper dead band dT) and also when the difference is lower than 5 , in both cases , the pump is on. So what is the Upper dead band dT ?

[cid:54dd6c11-8aa8-40a7-b6ca-f45dea871f29]


..............................................................................................
Ahmad abbasianzadeh
Solar energy Researcher
Harrisburg, Pensylvania



________________________________
From: leen peeters <l.f.r.peeters at gmail.com>
Sent: Sunday, February 5, 2017 9:18:21 AM
To: ahmad abbasian; TRNSYS users mailing list at OneBuilding.org
Subject: Re: [TRNSYS-users] what is the upper dead band in controller ?

Hi,

can you rephrase your question. The answer is probably easier than getting the point of your higher lower than-part

leen

On 5 February 2017 at 20:33, ahmad abbasian via TRNSYS-users <trnsys-users at lists.onebuilding.org<mailto:trnsys-users at lists.onebuilding.org>> wrote:

Dear All

in a differential controller what is the upper dead band? I know that when the difference of  Th and Tl is lower than "lower dead band temperature" the controller will actand , for example , the pump will be turned off. but for the difference higher lower than "upper dead band" and also higher than it, the pump is turned on !


Thank you


..............................................................................................
Ahmad abbasianzadeh
Solar energy Researcher
Pensylvania
[x0yyutg5hv1.png]


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