Re: [TRNSYS-users] Thermal storage Tank

[Jeff Thornton <thornton@tess-inc.com>]

Type 4 has the ability to have two ports.  Please take a moment and read the documentation for the model as it will explain how Type 4 works.

If you want a constant temperature source I would suggest using an auxiliary heater with an infinite heating capacity and a controlled outlet temperature of 70 C.  Set up a flow loop from the bottom of the tank to a pump, then a pipe, then the heater, then another pipe and finally back to the top of the tank.  Use a differential controller or aquastat to control the on/off operation of the pump.

There are splitters in the TESS Hydronics library that allow for splitters into N ports.  If you don’t have access to the libraries then use multiple diverting valves or use equations.

Jeff - TESS



Sent from my iPhone

> On May 5, 2020, at 3:27 AM, may kamal salah via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:
> 
> 
> Hello 
> 
> I have a question regarding the thermal storage tank (type 4). I have two different systems that are coupled to the tank, so I will need 2 different inlets and 2 different outputs.
> Type 4 just allows me to use 1 inlet - 1 outlet.
> And I have contacted you before asking the difference between type 4 and type 60 and you told me that type 60 is obsolete and I should use Type 4 better.
> So my question is is there any variable or any element that could let me introduce 2 inlets - 2 outlet in type 4? if not, how can I do it?
> 
> Another question is, I have a heat source with a constant temperature of 70 degrees. In energyplus there is an object called. Plant temperature source, is there anything similar?
> 
> And, splitters and mixers they just divert the flow in 2, can I diverted in 3?
> 
> Thank you
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