Time Step for SAM Model Simulations

Dear Paul,

No problem, I've just sent to you an email with my wheather file. I've sent the email to the following email adress: This email address is being protected from spambots. You need JavaScript enabled to view it.

Regards,
Pablo

Dear Paul,

Following with this issue, I have tried to create a .smw file with 15 min time-step wheather data to simulate it with SAM 2014.1.14, the version you told me that worked with subhourly data for physical trough models. For creating the wheather file, I have used as reference the file "NV El Dorado Hourly", which I have found in the wheather library of SAM 2014.1.14.

Here below I try to explain what I did to create the wheather file, because at the end it didn't work properly:
-First of all, I adapted the wheather data to .smw format, as you can see in the following example of the 35040 rows:
17,-999.,-999.,50.6,1.4,353,1053,0,0,0,-999.
17,-999.,-999.,50.8,1.4,353,1053,0,0,0,-999.
17,-999.,-999.,50.9,1.4,353,1053,0,0,0,-999.
17,-999.,-999.,51.1,1.4,353,1053,0,0,0,-999.
17,-999.,-999.,51.3,1.4,353,1053,0,0,0,-999.
17,-999.,-999.,51.5,1.4,353,1053,0,0,0,-999.
- I kept the header of file "NV El Dorado Hourly" with these data as you can see in the following example:
723860,"Clark/El Dorado",NV,-8.0,35.796245,-114.974334,548.64,3600.,2010,0:30:00,
17,-999.,-999.,50.6,1.4,353,1053,0,0,0,-999.
17,-999.,-999.,50.8,1.4,353,1053,0,0,0,-999.
-I imported the wheather file in SAM and run the physical trough model and it worked properly
-I changed the header
-I run the model with the changed header and tried to run the model and it didn't work (the message was Simulation error!...check your inputs and try again)

I checked where was the problem and I think that it has something to do with the latitude, longitude or time zone, because it is when I change that data when the model doesn't work.

I've sent you an email with my wheather file .smw, please could you tell me where is the problem and how can I solve it?

Thank you very much in advance.

Best regards,

Pablo.

Dear Paul,

Thanks again for your quick answer. I've tested all combinations to create my .smw and finally I can tell you that I am not able to create it or it is impossible to run it in a parabolic trough physical model in SAM 2014.1.14.

The .smw file works properly with parabolic trough physical models changing no matter what input, but it doesn't work when I change the "time step" or the "start time". I've tested even with data of "Clark/El Dorado" only changing the "time step" or the "start time" and it doesn`t work. It doesn't matter the value I put instead of 3600 sec or 0:30:0, it doesn't work in any case.

The only thing that comes to me to solve this mess is that you send me by email an example of .smw file with 15 min time step in order to take it as reference.

Please, could you send me this example of .smw file?

Thanks in advance.

Regards,
Pablo.