Linear Fresnel

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nepalbinay
PTC and LFR

I am doing a performance analysis of physical model parabolic trough and linear fresnel reflector. When I ran the simulation, I found everything fine except the absence of "Plant Efficiency" in the result summary (other results like annual energy, gross to net conversion, capcity factor, and water usage were available). Do SAM automatically provide the value of plant efficiency or I need to calculate it seperately? I am a student and new user of SAM, so help me with this, please.

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LauraAdarme
Parasitic Differenses

Hello Paul, I am comparing two different models (CSP Linear Fresnel Steam and CSP Linear Fresnel (Molten)). The model using molten salts as HTF calculates the amount of electrical power consumed by a single collector tracking mechanism. Why the steam model does not calculate that?

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Teresa
how to use data

Hi! Im begining to use SAM. Im confused whit the data to use in CSP, Im using hourly DNI, and for flat plate collectors hourly GHI, DHI and DIF. Is it right?
Thanks

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hys05
Flowsheet for the CSP linear Fresnel Molten Salt model used by SAM with labeling the streams using the hourly data variables

Dear SAM support team

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Paul Gilman
Linear Fresnel Secondary Concentrator

In the model of "Molten Salt Linear Fresnel," I find that the software dose not has the corresponding input parameter about CPC (secondary parabolic mirror). How to consider the influence of the secondary mirror in the simulation calculation?

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Park Jin Gyu
What's the meaning of Field total efficiency?

question 1 : What's the meaning of Field total efficiency and thermal efficiency and optical efficiency?

question 2: I thought that thermal power produced result should be same with (beam normal irradiance)*(Field total efficiency)*(heliostat area) but the result was not same, how thermal power produce can be calculated in SAM?

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JinGyu
LFR steam direct question

I want to know full detail of Thermal efficiency and collector optical efficiency.
and I want to know the absorber efficiency

1 post / 0 new
Paul Gilman
Case File

Is there an example file for a biopower system?

If you want to see an example of a system in SAM, just create a case with the combination of performance model and financial model for the project you want to investigate. Here are step-by-step instructions to see an example of a biopower system; you can use the same technique to start modeling a photovoltaic, wind, or other type of system:

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williampaulbell
Change in start hour from 1 am to midnight in the change from version 2014.1.14 to 2014.11.24

Dear Paul

Could you answer the following query regarding the change in start hour from 1 am to midnight in the change from version 2014.1.14 and 2014.11.24 please?

I am using all the defaults for the technology "CSP linear Fresnel direct steam" with "No financial model" option.

The TMY3 input file and SAM's output, the Hourly "Electrical Source - Gross Output(MWh)" are attached.

The input TMY3 starts at 1 am but SAM's output starts at midnight.

---1. Should I re-base the TMY3 input files to start at midnight?

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williampaulbell
Gross cycle power output and hour of day mismatch for LFR

Hello Paul

Could you comment on the following mismatch between time of day and gross cycle power output in the attached SAM results file. The input file is also attached. The input is a constant DNI = 767 W/m2. This constant DNI helps isolate the mismatch effect from any possible vagaries of the usual DNI daily cycle.

The table below shows the first day from the results file. The gross output builds up to over 35 MWh before 12 noon then drops to just over 11 MWh at 1 pm.

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