Linear Fresnel

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dbrakemeier
Fresnel linear focusing systems relationship between "General optical derate" and "Receiver optical derate"

Dear Paul,

my doubt refers to the way SAM processes the two input parameters:

"General optical derate" at the upper right area of the sheet "Collector and Receiver"

and the

"Receiver optical derate" at the buttom of the same sheet.

The "Receiver optical derate" according to my trials is influenced only in case the "Evacuated Tube Model" is selected to determine the "Receiver Geometry and Heat Loss".

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tejvirsingh24
error in simulation

The solution encountered an unresolvable NaN error in the heat loss calculations. Retrying solar field calculations...

I am receiving this error in the simulation with user-defined HTF. Please help me to fix this issue. I am using the latest version of sam.

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Jose_GTER
Optical efficiency in LFR

I'm modeling a LFR plant in SAM. When I have to select the optical efficiency, in "Collector and receiver" section, i have three options: Solar position table, Collector incidence angle table and IAM. I calculate the solar position table with a ray tracing software, and also the IAM, and with the two methods, I compare the result in production and the difference is high (almost double using IAM). I don't understand this, because I use the same reference that SAM in the calculate of Solar position table, and also to calculate the IAM.

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vikas3v
For Linear Fresnel model, the array m_dot_loop is returned as an empty one for Python 3 wrapper

Hi,
I am trying to get the mass flow rate of saturated steam at Condenser for a Linear Fresnel CSP model from a SAM wrapper for Python 3. Since this mass flow rate is not directly defined on SAM, I am just trying to get the mass flow rate for Receiver. I am assuming that this mass flow rate will be the same as the flow rate at the condenser side as well. Please let me know if it is wrong to assume so.

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Gabriel Caiza
IPH Linear: collector and receiver

Hello,

Could you tell me, what the type (model) of collector and receiver in IPH Linear used by default?

Best regards,
Gabriel

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Gabriel López
Load profile

Hi,

Is it possible to introduce a load profile in Process heat linear direct steam and parabolic trough mode?

Thanks,

Gabriel

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fmiller
Sub-hourly simulation for Linear Fresnel

Dear SAM Team,
we formatted a CSV weather file to run a simulation for Linear Fresnel in sub-hourly basis, like 15 minutes and 1 minute (as we were able to run such simulations for PTC and Power Tower). However, the program took each line in the file as an hourly value, so that we had only 91 "days" for 15 minutes simulation and six "days" for one minute simulations.

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bahram1374
azimuth in solar posision mode

Hi
i m facing a problem
HOW SHOULD I USE AZIMUTH ANGLE ?
IS ITS ORIGIN FROM NORTH OR SOUTH? CLOCKWISE OR COUNTER_CLOCKWISE ?

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pablodellicompagni
Problem to lunch the applicatiion

Dear all.

I installed the SAM software in Windows, but when I try to open it, an error message appears immediately. I tried to resolve by reinstalling SAM but there are no changes, the same error appears. The error message is: 'the application could not be started correctly (0xc000007b). Click on OK to close it'. Attached you can find a prin-screen of the message.

Thanks.

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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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