Model Technical Details

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Marcos Diego Paes
User-defined HTF - IPH Trough Model

I'm having some issues with the HTF user-defined data table when simulating with the Process Heat Parabolic Trough model (SAM Version 2017.9.5, 64 bit, updated to revision 2).

When I run the simulation I get the following message:

exec fail(trough_physical_iph): The user defined field HTF table must contain at least 3 rows and exactly 7 columns. The current table contains 1 row(s) and 1 column(s)
Simulation trough_physical_process_heat failed.

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williamwarnock
IAM, Anti-reflective Coating, First Solar FS-4120A-3 versus FS-4120-3,

Hi Paul,

I modeling a project using First Solar FS-4120A-3 panel which includes a antireflective coating. I would expect to see less module losses than when using the FS-4120-3 which doesn't include the coating, but both results are exactly the same. I read that the Incident Angle Modifier, (IAM) is taken into account in the CEC Performance Model, and shows up in SAM in the results in the Module Losses. I would think that the antireflection coating would have less losses than the same panel without the coating. I uploaded the SAM model so you can see what I'm talking about.

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williamwarnock
CEC Performance Model with User Entered Specifications

Hi Paul,

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JQ_PVS
Day/Hour Angle Calculation?

Hi there! I am using the DISC excel file from http://rredc.nrel.gov/solar/models/DISC/ to estimate my DNI using GHI. I am trying to understand the model and is unsure of how the day angle and hour angle are being derived. Can someone enlighten me on this?

Thanks!

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thilina fdo
Collector heat removal factor

NEED HELP!!!!
What is collector heat removal factor?
And does the SAM parabolic trough physical model has this factor?

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s.mcgill
Reserve Capacity - Ongoing

Hi SAM team / users - I'm looking to see how to incorporate Reserve Capacity revenue into the model.

In Western Australia, generators are paid an annual rate for having a certain quantity (MW) of power available for reserve capacity. This payment is an annual amount based on the nameplate and capacity factor of the generator - e.g. a 20% CF 10MW solar farm would have a 2MW reserve capacity amount, which has a certain revenue attache to it (for example, $1m/MW, so $2m/yr). What is the best way to incorporate this type of revenue stream into SAM?

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EngineerStudent
Project with imported profiles

Is it possible to create a project with all profiles imported?

For school we need to simulate PV-installation with battery for a residential building connected to grid.
Is it possible to import different profiles for all these types?
*Battery profile (when load and unload)
*Profile for PV installation
*Profile for the residential home/load profile
*A financial profile for the grid, so you can simulate that the battery can charge at nighttime when the energy price is low.

Thank you kindly

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gholamrezaimn
gholamrezaimn's picture
SAM CSP Linear Fresnel Optical Efficiency Weather Data

Dear Paul
Hi,

I was wondering if SAM calculates the optical efficiency table automatically for CSP Linear Fresnel Molten Salt
using the weather data uploaded? If it does not do that, how can I do that manually and is there any limit for dimension of the
Optical efficiency matrix?

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TymB
Negative NPV in PPA

Hi,

I'm new to SAM and third party Power Purchase Agreements for Solar PV.

Is there anything else than the first year PPA price which would change the NPV of a project to be negative? Currently my NPV is -$145,000 with $0.125/kWh. If I bring the 1st year PPA price to $0.06/kWh NPV is $32,311.

I'm also confused why there is no simple payback.

Please Help

Thanks!

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Pavesa
Customize Micro Inverter Specifications?

Hi

I'm using SAM to try and generate comparative annual production figures for a solar PV system. It will have LG 315 Watt modules and I'm wanting to evaluate the output with the M250 micro inverter (now out of production) and also with the AP Systems YC500i.

I'd like to be able to change some of the parameters for the micro inverters, eg/ Maximum AC Power on the "Inverter" page and I was wondering if there is any way to do this?

Thanks..

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