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[TRNSYS-users] Cooling/heating control signals: TRNSYS-users Digest, Vol 110, Issue 18






On Fri, Feb 14, 2014 at 2:20 AM, <trnsys-users-request@cae.wisc.edu> wrote:
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Today's Topics:

   1. IF statemenet (metkell yebiyo)
   2. Re: IF statemenet (Fassnacht, Tillman (IEB))
   3. type 536 (Messaouda Anis)


---------- Forwarded message ----------
From: metkell yebiyo <metkell@yahoo.com>
To: "trnsys-users@cae.wisc.edu" <trnsys-users@cae.wisc.edu>
Cc: 
Date: Thu, 13 Feb 2014 13:19:08 +0000 (GMT)
Subject: [TRNSYS-users] IF statemenet
Dear TRNSYS users,

Could you anyone tell me if it is possible to write an if statement in the equation box,
I am trying to send a control signal based on the outside temperature, if outside air temperature is
greater than 18 deg C then the heat pump would run in cooling mode else if the outside air temperature is less than 14 deg C then  the heat pump would run in heating mode.

Any suggestions would be appreciated thank you very much.


Regards,
Metkel

Metkel Yebiyo BEng (Hons), MSc
CEREB PhD Researcher - Ground Source Heat Pumps
Room T615
Department of Urban Engineering
Faculty of Engineering, Science and the Built Environment
London South Bank University,
103 Borough Road,
London SE1 0AA
Tel: +44 (0)20 7815 7639


---------- Forwarded message ----------
From: "Fassnacht, Tillman (IEB)" <tillman.fassnacht@kit.edu>
To: metkell yebiyo <metkell@yahoo.com>, "TRNSYS users mailing list at the Solar Energy Lab, UW-Madison" <trnsys-users@cae.wisc.edu>
Cc: 
Date: Thu, 13 Feb 2014 14:31:01 +0100
Subject: Re: [TRNSYS-users] IF statemenet

Hello Metkel,

 

you have to utilize the greater than and less than function GT/LT in the right way.

 

GT(Tamb,18)+LT(Tamb,14)*2

è 0 no mode

è 1 cooling mode

è 2 heating mode

 

Mit freundlichen Grüßen / Kind Regards,


Tillman Faßnacht

 

Telefon: 0721 608 43769

 

Von: trnsys-users-bounces@cae.wisc.edu [mailto:trnsys-users-bounces@cae.wisc.edu] Im Auftrag von metkell yebiyo
Gesendet: Donnerstag, 13. Februar 2014 14:19
An: trnsys-users@cae.wisc.edu
Betreff: [TRNSYS-users] IF statemenet

 

Dear TRNSYS users,

 

Could you anyone tell me if it is possible to write an if statement in the equation box,

I am trying to send a control signal based on the outside temperature, if outside air temperature is

greater than 18 deg C then the heat pump would run in cooling mode else if the outside air temperature is less than 14 deg C then  the heat pump would run in heating mode.

 

Any suggestions would be appreciated thank you very much.

 

 

Regards,

Metkel

 

Metkel Yebiyo BEng (Hons), MSc

CEREB PhD Researcher - Ground Source Heat Pumps

Room T615

Department of Urban Engineering

Faculty of Engineering, Science and the Built Environment

London South Bank University,

103 Borough Road,

London SE1 0AA



---------- Forwarded message ----------
From: Messaouda Anis <anis_messa@yahoo.fr>
To: "TRNSYS-users@cae.wisc.edu" <TRNSYS-users@cae.wisc.edu>
Cc: 
Date: Thu, 13 Feb 2014 15:19:56 +0000 (GMT)
Subject: [TRNSYS-users] type 536
Dear Trnsys_users,
For the type 536
please it is possible to change the diameter of a tube. 
thank you

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--
Ali shirazi
PhD Candidate
School of Mechanical and Manufacturing Engineering
The University of New South Wales
Sydney NSW 2052
Australia
Email:
ali.shirazee@gmail.com
a.shirazi@student.unsw.edu.au