Parabolic Trough

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NAIR
Payback NaN and LCOE

Hi SAM Community

I'm trying to reproduce in SAM a Pre-Feasibility Study of a Small-Scale Concentrating Solar Power Plant in Sacramento.
I'm using CSP empirical as study demands.

The result that I consider the most important is the "payback" that according to the article is 28 years, but in my simulation it gives as a result NaN. I have entered all the data that the article demands but I think there are missing information that must be entered into the model.

I hope you could help me fixing this. I attach the model and the article.
My best regards.

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saurabh.suman
Error in thermal storage system while calculating the heat exchanger derate in v2017

I was doing one to one analysis of a particular case file from SAM v2014 to SAM v2017 and I found out the following error:
1. While calculating the HX derate in v2014, a different formula has been used than in v2017 (Please check that)due to which storage parameters are coming out to be different.
2. For the same hot side and cold side HX approach temperature in v2014, the HX derate value is coming out to be different in v2017.

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fernando piris
Solar Field Inital Temp.- Empirical Model

How can I determine the Solar Initial Temp. in the Empirical Model of Parabolic Through? Or why the default value in SAM is 100 °C? I'm modeling a Solar Plant with Therminol VP-1 as HTF

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fernando piris
Gallons per Area (empirical model)

I have a question about the Empirical Model. How can I calculate the value of HTF Gallons per Area in the case I want to use Molten Salt as HTF? Does it change a lot of the value using Therminol? I think that if the empirical model gave me the option to use Molten Salt as HTF is because the solar plant can be modeled in this option or am I wrong?

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fernando piris
Piping heat losses

I have a question about CSP Parabolic through (empirical) model. Why does the model use a value of 10 W/m^2 for the Piping Heat Loss at Design Temp for default? I also want to know if the Piping Heat Loss Coefficients (1-3) values are universal for any plant configuration and if not, what they depend on?
Specifically I want to model a plant with Molten Salt as HTF

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Javier Rodriguez
HTF pump

Hi
In parabolic Trough
What is the difference between "Parasitic power solar field HTF pump" and "Parasitic power TES and Cycle HTF pump"?

What is the difference between Cycle HTF mass flow rate and Field HTF mass "flow rate total"

Thanks so much

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liub06
Input variables of SSC tcstrough_physical

Hello,

I have a question about the input variables in tcstrough_physical SSC.

1. 'hx_config',is there any explanation for the number represent for heat exchanger type. Like '0' represent for shell-tube heat exchanger.

2. If I have already selected the fluid number, such as 3 represent for VP-1 as field HTF and 0 represent for Hitec Solar Salt as storage fluid, do I still fill the inputs of 'field_fl_props' and 'store_fl_props'?

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solarjoe
Input variable in SAM and SAMSDK

Hello,

I have a question and hope that you can help me.

E.g. for the module "tcstrough_physical" the SDKtool lists
the variable "nLoops" with a type of "SSC_INPUT".

In SAM this variable is available in
Trough, Physical - Solar Field - Actual number of loops

But as a fixed field (shaded blue).

Does that mean it is possible to set this variable explicitly from
the SDK but it is calculated implicitly in SAM?

Do I have to handle all the implicit fields in SAM manually in SAMSDK?

Kind regards,
Joe

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liub06
tcstrough-physical example failed in matlab

Hi

I was attempting to run the tcstrough_physical model with Matlab. I receive an error:

tcstrough_physical errors:
time 0.00 { Controller 3 }:
Heat exchanger sizing failed
unit 3 (Controller) type 'sam_mw_trough_type251' failed at initialization
exec fail(tcstrough_physical): there was a problem simulating in tcskernel(physical trough)

I have already examined the input parameters carefully. In addition,I can't find the explanation for 'hx_config'.

The .m and weather file are as attached. Is there any clue when that might happen?

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ywj11940405
ywj11940405's picture
How can I use the script ,and if I write a new script ,can I ues it with the project that the SAM provide ?

How can I use the script ,and if i write anew script ,can i use it with the CSP projcet that i build in the SAM ? Can I use it with the MATLAB:?

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