- Posts: 4
Parabolic Trough Physical Model - Sizing geometry error
- mominahahmad
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14 Jun 2021 04:42 #9701
by mominahahmad
Parabolic Trough Physical Model - Sizing geometry error was created by mominahahmad
Hi, I am trying to simulate PTC-physical model with Solar Multiple of '3' and TES of 8 hours, the design point DNI is 708 W/m2, with rest of the parameters set as default. I am getting the following error:
Can you please explain why is it giving this error?
Code:
exec fail(trough_physical): C_csp_trough_collector::off - freeze protection failed to converge
Simulation trough_physical failed :Piping geometry file
Maximum fluid velocity: 3.00
Minimum fluid velocity: 2.00
To section 1 header pipe diameter: 1.3208 m (52.00 in)
To section 2 header pipe diameter: 1.3208 m (52.00 in)
To section 3 header pipe diameter: 1.3208 m (52.00 in)
To section 4 header pipe diameter: 1.3208 m (52.00 in)
Loop No. | Diameter [m] | Diameter [in] | Diam. ID
--------------------------------------------------
1 | 0.6350 | 25.0000 | 1
2 | 0.6350 | 25.0000 | 1
3 | 0.6350 | 25.0000 | 1
4 | 0.6350 | 25.0000 | 1
5 | 0.6350 | 25.0000 | 1
6 | 0.6350 | 25.0000 | 1
7 | 0.6350 | 25.0000 | 1
8 | 0.6350 | 25.0000 | 1
9 | 0.6350 | 25.0000 | 1
10 | 0.6350 | 25.0000 | 1
11 | 0.6350 | 25.0000 | 1
12 | 0.6350 | 25.0000 | 1
13 | 0.6350 | 25.0000 | 1
14 | 0.7811 | 30.7500 | 2
15 | 0.7811 | 30.7500 | 2
16 | 0.7811 | 30.7500 | 2
17 | 0.7811 | 30.7500 | 2
18 | 0.7811 | 30.7500 | 2
19 | 0.7811 | 30.7500 | 2
20 | 0.7811 | 30.7500 | 2
21 | 0.7811 | 30.7500 | 2
22 | 0.7811 | 30.7500 | 2
23 | 0.7811 | 30.7500 | 2
24 | 0.7811 | 30.7500 | 2
25 | 0.7811 | 30.7500 | 2
26 | 0.7811 | 30.7500 | 2
gen not assigned
Simulation grid failed :gen not assigned
SSC requires input 'annual_energy', but was not found in the SAM UI or from previous simulations
Simulation lcoefcr failed :precheck input: variable 'annual_energy' (Annual energy production) required but not assigned
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- pgilman
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- Posts: 5423
14 Jun 2021 10:44 #9702
by pgilman
Replied by pgilman on topic Parabolic Trough Physical Model - Sizing geometry error
Hi Mominah Ahmad,
This message is from the piping model, which is described in Section 2.5 of Wagner (2011) "Technical Manual for the SAM Physical Trough Model," available here: sam.nrel.gov/concentrating-solar-power/csp-publications.html .
This error indicates that given the design solar field mass flow rates and other input parameters, the piping model was unable to determine a selection of piping diameters (See Section 2.5.1 in the manual).
Best regards,
Paul.
This message is from the piping model, which is described in Section 2.5 of Wagner (2011) "Technical Manual for the SAM Physical Trough Model," available here: sam.nrel.gov/concentrating-solar-power/csp-publications.html .
This error indicates that given the design solar field mass flow rates and other input parameters, the piping model was unable to determine a selection of piping diameters (See Section 2.5.1 in the manual).
Best regards,
Paul.
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- Wengpin
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- Posts: 23
28 Jul 2021 08:16 #9886
by Wengpin
Replied by Wengpin on topic Parabolic Trough Physical Model - Sizing geometry error
Hi Mominah Ahmad,
May I know how do you solve this issue?
Dear Paul,
May you advise on how to solve this problem?
Best regards,
Weng Pin.
May I know how do you solve this issue?
Dear Paul,
May you advise on how to solve this problem?
Best regards,
Weng Pin.
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