[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [TRNSYS-users] TRNsys basic simulation of a an instantaneous gaz heater

Anas,
 There is no flow of liquid going through your heater. The inlet flow rate is set to a constant value of 0.

 I am unclear on why you are sending a heating rate to the Type940 heater model. Type940 is intended to compute how much energy is needed in order to raise the temperature of a liquid flow from its inlet temperature to a setpoint temperature. If you already know how much energy your heater needs then there is no reason to use a heater model. You could compare your known energy quantity with the results of Type940 or you could use a simple equation to compute the temperature of the water leaving a heater based on your known energy quantities.
regards,
 David


On 4/22/2015 12:58 AM, Anas Majdouli wrote:


From: majdouli_anas@hotmail.fr
To: trnsys-users@lists.onebuilding.org
Subject: TRNsys basic simulation of a an instantaneous gaz heater
Date: Wed, 22 Apr 2015 07:57:06 +0200

Hi TRNsys community !

 

I am working on a simulation using Type940 [Gas Tankless Water Heater] and based on a daytime strategy using Type 14c [Time Dependent Forcing Function: Internal Gains].

The values of Type 14c points are heat rates [kJ/hr] because I calculated for each hour the energy rate required for heating. But the energy output of the heater (Type940) doesn’t correspond match with my forcing function : it remains constant L.

 

Please find attached to this email my simulation files. I am using TRNsys 17.

Thanks in advance for your help.

 

Yours Sincerely,

Anas MAJDOULI



_______________________________________________
TRNSYS-users mailing list
TRNSYS-users@lists.onebuilding.org
http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org


-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley@tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com