[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[TRNSYS-users] Real Power Data - Simulation Results Comparison

Hello,

I have 15 minute real data from a PV system . I know the ambient temperature(F), total radiation (kJ/h-m^2) and power(W) for every 15 minute. 
I created a model and wanted to compare real power values and simulation results. When I run the simulation, the results are not close, the simulation results are so lower than real values. 

I did the necessary changes like slope or azimuth according to PV system information.

I created a input file and the model takes  the ambient temperature and  radiation values from it. I chose 0.25 hour as "simulation step" in Control cards. Also,in  the Type 9(Input file) I chose 0.25 hour as "Time interval of data".
 
My question is: 

The PV type gives power production as kJ/h, so do I need to do any conversion to compare with 15 minute real data or TRNSYS does that because I changed the time steps?

PS: I am attaching my tpf file and input file. 
Also, when I converting  power production from kJ/h to Watt , I also multiplied 637,because there is 637 panel in the system. 

Thank you.

Attachment: Real_Simulation_Comp..tpf
Description: Binary data

Time,Total Radiation (kJ/h-m^2),Ambient Temperature (F),Real Power (W)
0,0,64.3999939,0
0.25,0,64.3999939,0
0.5,0,64.3999939,0
0.75,0,64.3999939,0
1,0,64.3999939,0
1.25,0,64.3999939,0
1.5,0,64.3999939,0
1.75,0,64.3999939,0
2,0,62.59999847,0
2.25,0,62.59999847,0
2.5,0,62.59999847,0
2.75,0,62.59999847,0
3,0,62.59999847,0
3.25,0,62.59999847,0
3.5,0,62.59999847,0
3.75,0,62.59999847,0
4,0,62.59999847,0
4.25,0,62.59999847,0
4.5,0,62.59999847,0
4.75,0,62.59999847,0
5,0,62.59999847,0
5.25,0,62.59999847,0
5.5,0,62.59999847,0
5.75,0,60.79999924,0
6,57.6,62.59999847,1226.000071
6.25,87.83999863,62.59999847,3101.000071
6.5,142.5600082,64.3999939,5445.000172
6.75,118.0799973,62.59999847,7424.000263
7,140.0400055,62.59999847,10831.00033
7.25,159.1200027,64.3999939,14680.00031
7.5,208.4400055,64.3999939,19626.00136
7.75,659.160022,66.19999695,25448.00186
8,499.680011,66.19999695,18645.00046
8.25,1170,68,41602.00119
8.5,1271.520044,68,47252.00272
8.75,1441.8,69.80000305,53896.00372
9,1628.639978,69.80000305,60394.00101
9.25,1752.120044,71.59999847,65092.00287
9.5,1960.920044,71.59999847,73924.0036
9.75,848.519989,71.59999847,53432.00302
10,2436.120044,71.59999847,92264.00757
10.25,708.480011,73.3999939,27805.00221
10.5,2164.320044,73.3999939,49738.00278
10.75,700.2,75.19999695,25795.00198
11,3364.560132,75.19999695,118468.0023
11.25,1183.680066,75.19999695,41704.00238
11.5,1238.760022,75.19999695,51836.00235
11.75,1252.439978,75.19999695,48576.00403
12,3051.360132,75.19999695,107868.0038
12.25,3490.920044,77,121944.0079
12.5,3740.759912,78.80000305,129208.0078
12.75,2463.479956,78.80000305,69708.00018
13,939.239978,77,33600.00229
13.25,3947.040088,78.80000305,137680.0079
13.5,3916.8,78.80000305,136152.0081
13.75,933.839978,80.59999847,35041.99982
14,1054.439978,80.59999847,37854.00009
14.25,3870,78.80000305,131527.9999
14.5,1170,80.59999847,33226.00174
14.75,3642.120044,78.80000305,123136.0092
15,3642.120044,80.59999847,124472.0078
15.25,711.360022,78.80000305,11926.0006
15.5,3183.479956,80.59999847,110672.0047
15.75,3067.920044,80.59999847,105484.0088
16,812.880011,82.3999939,75000
16.25,2837.160132,82.3999939,97532.00531
16.5,2628.360132,82.3999939,90556.00739
16.75,2405.879956,82.3999939,85380.00488
17,2219.040088,82.3999939,76428.0014
17.25,2018.520044,84.19999695,70452.00348
17.5,1870.2,82.3999939,65460.00671
17.75,1771.560022,84.19999695,62038.00201
18,1422.720044,84.19999695,49240.00168
18.25,1274.4,82.3999939,42988.00278
18.5,1060.2,82.3999939,35000
18.75,271.8,82.3999939,8938.000679
19,661.680011,82.3999939,19715.00015
19.25,483.119989,82.3999939,13459.00059
19.5,343.080011,82.3999939,8603.000641
19.75,203.0400055,84.19999695,3445.000172
20,74.16000137,80.59999847,0
20.25,0,77,0
20.5,0,77,0
20.75,0,75.19999695,0
21,0,75.19999695,0
21.25,0,75.19999695,0
21.5,0,73.3999939,0
21.75,0,73.3999939,0
22,0,73.3999939,0
22.25,0,71.59999847,0
22.5,0,71.59999847,0
22.75,0,71.59999847,0
23,0,71.59999847,0
23.25,0,71.59999847,0
23.5,0,69.80000305,0
23.75,0,69.80000305,0
24,0,69.80000305,0