[TRNSYS-users] TYPE907

6 posts / 0 new
Last post

An HTML attachment was scrubbed...
URL:

Johannes Kirch's picture
Offline
Joined: 2016-04-05
Reputation: 0

I don't have the proforma in from of me but do you have flow through all the required inlets (cooling water, etc) and any on/off control signals set on? If you're convinced you do, it would help to send the project along.

Jeff Thornton
TESS

Sent from my iPhone

Jeff Thornton's picture
Offline
Joined: 2011-10-02
Reputation: 0

An HTML attachment was scrubbed...
URL:

Johannes Kirch's picture
Offline
Joined: 2016-04-05
Reputation: 0

Johannes,

I took a look at your project and I think you should take a step back
and work on things a bit at a time. I've attached a simple project
showing how a 70 C cooling stream is connected to an IC Engine with a
varying load. Take the time to completely understand how this project
works before connecting up the tank, condenser, tank cooling stream etc.
Remember that the odds of the default engine performance files being
identical to your particular machine are small - you may have to modify
the parameters and external files to match your given simulation. Your
question as to "Next, I have thermal load profiles in kWh. I don't know
how I can integrate the load to unload the storage." How do they do it
in real life? There's your answer. I'm guessing they have a pumped flow
through the tank that uses the thermal energy. Try the flowstream loads
component, controllers, pipes, pumps etc to mimic the real world system.

Jeff

---
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 at tess-inc.com

On 05/20/2015 8:51 am, Johannes Kirch wrote:

Links:
------
[1]
http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org

Jeff Thornton's picture
Offline
Joined: 2011-10-02
Reputation: 0

Johannes,

You actually might be in luck with the provided TESS sample catalog data for your micro CHP system. There is a popular micro CHP system that is manufactured here in Wisconsin, the ?Marathon Engine? or the Ecopower, and it produces 5.5 kW electric and 12.5 kW thermal (from the 4 HXs that you mentioned) that runs on natural gas or propane. It used to be manufactured in Germany or Austria, so perhaps it is the same or very similar system? I was on a project team that helped implement the system in an energy systems laboratory at MSOE, and there was another TRNSYS user that implemented a system at the University of Maryland. Nonetheless, there is an external data file for a similar an IC engine system that is provided with the TESS Libraries:

C:\Trnsys17.02.0003\Tess Models\SampleCatalogData\IC Engine\ECOPOWER9-18.dat

As you can see from the comments and the values in the data file, the majority of the thermal energy from this goes into the jacket and the exhaust. It does not have waste heat from the generator in this particular data file.
However, I cannot stress enough what Jeff mentioned: take your time, take a step back, make sure this data file (with PLRs and fractional waste heat values) aligns to your particular system, get this piece working first, and then proceed with the rest of your simulation once you have that piece set. There is also a very simple example with this data file in Type907 with a simple exhaust heat exchanger for reference:

C:\Trnsys17.02.0003\Tess Models\Examples\Cogeneration (CHP) Library\IC_Engine.tpf

Cheers,

Matt

Matt Duffy
Sustainable

AEI | AFFILIATED ENGINEERS, INC.
5802 Research Park Boulevard | Madison, WI 53719

P: 608.236.1207 | F: 608.238.2614
mduffy at aeieng.com | www.aeieng.com

Matt Duffy2's picture
Offline
Joined: 2016-04-05
Reputation: 0

An HTML attachment was scrubbed...
URL:

Johannes Kirch's picture
Offline
Joined: 2016-04-05
Reputation: 0