the parabolic trough simulation result

Dear Paul Gilman,

I try to simulate a plant with the parabolic trough physical.
When I set the "collector azimuth angle" as 90°?and I find the thermal energy to the power block will be more than the thermal energy produced by the field in the data tables of result. I am confused about the result, so I guess something will be ignored by me. The attachment is my sam file.

I would appreciate it a lot if you would give me a reply.

Thanks and Best regards.

lisen huo

Dear Lisen Huo,

I do not see those results. When I run a simulation, I see that "field thermal power produced" is always more than "cycle thermal power input" except for times at night when thermal storage provides energy to the power block.

Best regards,
Paul.

Dear Paul Gilman,

Thanks very much for your replying.

Do you simulation with the meteorological data of CHN_Nei.Mongol.Hailisu.532310_CSWD.epw attached in above email? And could you send your

simulating result file to me?

The following is my simulating result data and you can see the "the thermal energy to power block" is more than "the thermal energy

field produced "

Thermal power produced by the field?MWht? Thermal energy to power block ?MWht?
Jan 41425.6 42912.4
Feb 44967.8 46051.4
Mar 50501.1 51263.1
Apr 48278.6 48225.7
May 62725.8 62739.7
Jun 65607.1 66191.9
Jul 63193.9 64831.7
Aug 45868.3 46431
Sep 45749.8 47335.7
Oct 45659.7 47151.4
Nov 35010.4 36153.8
Dec 37031.7 38343.7
Total 586019.8 597631.5


Best regards

lisen huo

Dear Lisen Huo,

In my comment above, I was looking at hourly results. You are looking at monthly totals.

For a system with storage, consider this data for a single day. You can see how the daily sum of power values to power block is greater than the sum of power values produced by the field:
 


Best regards,
Paul.

Dear Paul Gilman?

I am really appreciated for your information.

And I am confused what leads to the result that the power values to power block is greater than the sum of power values produced by the field in daily sum, month sum or year sum data. Could you explain it to me?
why is the energy produced by field less than Cycle thermal power input (MWt)plus TES thermal energy into storage (MWt) at a time point in hourly data you commented?

I try to find the loss energy by changing the row spacing, but i only find the shadowing loss efficiency instead of energy in the result.Could you tell me how to calculate shadowing loss energy by using hourly data in the result?

Best regards

Lisen huo

Dear Lisen Huo,

The reason that the sum of hourly power to power block is greater than the sum of power produced by field over some period of time is because of the nighttime hours when energy from storage goes to the power block. You can see that in the table above.

You can estimate the shadowing loss by multiplying the "Field collector row shadowing loss" by "Field thermal power produced."

Best regards,
Paul.