The auxiliary heat for Type 534 is done outside of the model with an aquastat model and either a gas heating device or an electric heating element. If you don't have access to the TESS Libraries, you could use a Type 6 auxiliary heater and a Type 2 controller from the standard library. If you have access to the TESS Libraries, use the heating aquastat from the TESS Controls Library and your choice of the in-tank heating device from the TESS Storage Tank library. By not having the heating element and control models inside of the tank model, the flexibility of the tank model is greatly increased.
Jeff
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Jeff Thornton
President - TESS LLC
22 N. Carroll Street, Madison WI USA 53703
Office: (608) 274-2577 Fax: (608) 278-1475
www.tess-inc.com
E-Mail: thornton@tess-inc.com
On 07/19/2012 5:54 am, Zhe Li wrote:
Dear Trnsys Users,
I am having a problem with the thermal storage cylinder. Would be possible if anyone could give me a bit advice?
I was using Cylinder type60d first, however, I have found out that there is no OUTPUT option for outlet flowrate of the heat exchanger inside the cylinder. Then I am trying to use Cylinder type534, however I have found out that there is no control for turning on/off the auxiliary heater. I am wondering if there is any cylinder functions like the standard solar thermal hotwater storage cylinder that consists of two heat exchangers and an auxiliary heater. One heat exchanger is to connect to the solar thermal panel and another is to connect to a boiler or a heat pump, the auxiliary heater can be turn on when the hotwater temperature is not met the requirement.
Thank you very much.
Zhe Li
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