Parabolic Trough

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FrankNam
FrankNam's picture
W/o solar power output difference

HI all

I am having trouble with results from the same model but two different input weather files. The one I run with meteonorm data for a location, the other I run with ground measured data entered into an existing SAM resource library file. (any advice on doing this the "right way" would be appreciated).

Please see the graphs attached. Can anybody explain why the meteonorm profile is higher during night-time operation than the ground-measured data night time operation?

Thanks
Frank

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h.johnson
Turbine output control

Hi SAM team,

I'm working on a LK script to change some simulation inputs and I'm wondering if it's possible to change the turbine output fraction to an array. In my script, it sets the 'ui_disp_1_turbout' to hourly values over a year with no error, but after simulating, it shows that the turbine output fraction does not follow the assigned array, and just stays as a single value. Attached is an image of part of the code.

If this is not possible, is there a way to best mimic an off grid CSP system to follow the demand profile?

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FrankNam
FrankNam's picture
Parasitic power solar field HTF pump electrical power usage

Hi Paul and team

Simple question about the Parasitic power solar field HTF pump electrical power usage. I have had a look through the forum, the help file and the physical trough report. I am battling to find how this parasitic demand is calculated. In my results, the value rarely exceeds 1.3 MWe, which is way too low. Most plants I have seen in SA have installed capacities of around 3x 2 MW or more.

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FrankNam
FrankNam's picture
Cooling tower water use results_reply

Hi Paul

Thanks for the support.

From the Equation 3.25 of the Physical Trough Reference Manual, could you please indicate which value is being reported in the time-series results of SAM as "Hourly Data: Cycle cooling water mass flow rate - makeup (kg/hr)",i.e. is it mdotwater or mdotcw?:
mdotevap = qdotrej/hevap
mdotdrift = fdrift mdotcw
mdotctbd = fctbd mdotcw
mdotwater = mdotevap +mdotdrift +mdotctbd

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h.johnson
Thermal load?

Hello!

I'm starting a project to analyze different methods of solar water/HTF heating to power an Organic Rankine Cycle for power generation with TES. After experimenting with some models already (CSP, IPH, and solar water heating), I was wondering what would be the best method to simulate variable electrical and thermal load requirements or if this would not be possible?

Thanks

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FrankNam
FrankNam's picture
Cooling tower water use results

Good day SAM team

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tayeb feriani
direct steam generation for parabolic trough

hey Paul,
i want to simulate a parabolic trough CSP plant working with direct steam generation but there is no specific model in SAM. how can i do?

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tayeb feriani
direct steam generation for parabolic trough

Hi Paul,
I want to simulate a parabolic tough CSP plant working with direct steam generation but there is not a specific model in SAM. So how can i do?
thanks

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aqeelkhan544
aqeelkhan544's picture
wind Stow Speed

Hello Paul Sir,
What is Wind Stow speed in solar field parameters section? is it same as wind speed that is in weather file or some different value?

For example in my model wind speed is 5.34 m/s average daily max. So will i have to consider this value or some other?

Regards,

Aqeel

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aqeelkhan544
aqeelkhan544's picture
Need Example for Industrial process heat Model for around 100 KWt

Hello seniors,

Could any body share any example model for small industrial process heat system (100 KWt).
I would be very grateful to you.

Regards

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