Results deviation when PTC model is run in different computers

  • Croisfelt
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08 Jul 2016 08:21 #4603 by Croisfelt
SAM is outputting some different results for the same Parabolic Trough (physical) model when run in different computers:
- Lists of inputs compared on excel and 100% matching in both computers;
- Also TMY source file is the same;
- Some hourly output data gotten by each user were compared as well:
> Matching results: Field thermal power incident, Field thermal power incident after cosine, Field thermal power produced, Cycle electrical power output (gross);
> Results of deviation: Cycle electrical power output (net), Gross-to-net conversion, Annual energy, Capacity factor.
- We are running the on same SAM's version (2015.1.30, to validate old model before upgrading to the newest release);
- Computers settings are 32 and 64 bits;
- Windows' number formats set as 'English (United Sates)' in both computers.

Thank you in advance for helping us.

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  • pgilman
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08 Jul 2016 14:57 #4604 by pgilman
Hello,

How much difference are you seeing in those results between the two computers?

Best regards,
Paul.

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  • Croisfelt
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11 Jul 2016 02:16 #4605 by Croisfelt
Hello Paul,

They differ in ~5%. We tested in a third computer and the results were as mine. I think there some setup on my boss' computer that results in this deviation.

Sent more clarifications by e-mail.

Thank you.

Best regards,

Thiago

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