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Re: [TRNSYS-users] type 907 - IC Engine

Federica,
If you click on the various cells in the spreadsheet, you can see the formulas that are used to generate the values.
Total Heat is the sum of five parts; Jacket Heat, Exhaust Heat, Heat Rejected to Atmosphere, Oil Cooler Heat, and Aftercooler Heat
The energy input is based on the HHV - which can be sen from the formula in the spreadsheet. 

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@tess-inc.com


On 07/24/2018 3:59 am, Federica Azzarri S238292 via TRNSYS-users wrote:

Hi TRNSYS users,

I'm a master thesis student and I need to use type 907 to simulate an
IC engine. I'm having some problems in the implementation of the
efficiency map as an external file to this type. I already saw the
example IC_Engine_Sample_Spreadsheet.xls inside the path
C:\Trnsys17\Tess Models\SampleCatalogData\IC Engine, but I don't
understand the values I must insert in the cells regarding four
columns: ‘Energy Input’, 'Exhaust Heat', 'Rejected to Atmosphere' and
'Total Heat'. At first, I thought that the ‘Total Heat’ values would
refer to the maximum value of heat power that can be recovered (fuel
power minus shaft power) but I verified that the values of ‘Total
Heat’ column are all bigger that these values. Moreover, I guess that
‘Energy Input’ refers to the value of fuel power, but I was wondering
how it’s evaluated: using the HHV or the LHV of the fuel?

Hoping to be clearer, I’m attaching in this message a picture
highlighting my issues.

Thanks in advance to anyone will try to help me,

Federica.

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