Preliminary results of the first six months operation …...Preliminary results of the first six...
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Preliminary results of the first six months operation of the Selegua Station in Southern Mexico Roberto Bonifaz-Alfonzo 1 , Adriana González-Cabrera 1 , , Héctor Estévez-Pérez 1 and Mauro Valdés-Barrón 1 1 Universidad Nacional Autónoma de México, Instituto de Geofísica, Circuito de la investigación científica s/n, Ciudad Universitaria, Ciudad de México, 04510, México. +52 55 56224141 [email protected] Introduction Renewable energy projects depend on proper technical and financial planning that requires the availability of reliable information about the energy resources that can be used for industry and electricity generation. For the case of solar energy, in Mexico, it was stablished a reference solarimetric network of fifteen stations during the last three years. The last of them (Selegua), is located in southern Mexico (Figure 1) in the State of Chiapas very near to the Guatemala border and has been proposed as candidate station for the Base Surface Radiation Network (BSRN). STATION LOCATION Latitude: 15°47'2.46" (15.784016°) N Longitude: 91°59'24.63" (- 91.990174°) W Elevation: 602 (MSL) Local Time GMT -06 Topography Type: 2 (Flat, Rural) Surface Type: 15 (grass) Instruments and data The Selegua station was installed and start operations in November 2017. It is the first of its type in Mexico and one of the few covering tropical environments around the world. The station measures bean, diffuse and global radiation and at least once a week measures with an absolute cavity radiometer are taken for reference and quality control of the data, also spectral parameters such as long wave radiation, UVB and illuminance and meteorological data are recorded. The following pictures show some of the instruments, the arrangement and the acquisition systems. Results After the firsts months of operations, recorded data show the relevance of a site in this location and allow to analyze particularities of monthly ad seasonal behavior of solar radiation information. For instance, normal solar radiation values over 400w/m 2 are reached very early in the morning until late in the afternoon even in winter months with low solar angles. Differences of winter and spring skies are also well characterized due to the cloudiness, humidity, and aerosol components. QA/QC procedures are doing on a daily and monthly basis, such as the daily number of records, comparisons between calculated and measured global radiation, scatterplots comparing data from pirheliometers and the cavity radiometer among other processes . 0 200 400 600 800 1000 1200 1 63 125 187 249 311 373 435 497 559 621 683 745 807 869 931 993 1055 1117 1179 1241 1303 1365 1427 1489 1551 1613 1675 1737 1799 1861 1923 1985 2047 2109 2171 2233 2295 2357 2419 2481 2543 2605 2667 2729 2791 2853 Global vs Calculated Irradiance GLOBAL_MEDIDA GLOBAL CALCULADA 0 200 400 600 800 1000 1200 06:28:4807:40:4808:52:4810:04:4811:16:4812:28:4813:40:4814:52:4816:04:4817:16:4818:28:48 Pirheliometers comparison Cavidad Pirh1 Pirh2 R² = 0.9984 0 100 200 300 400 500 600 700 800 900 1000 400 500 600 700 800 900 1000 Cavity vs Pirheliometer 1 Date Starting time Final time Observation hours 08-01-2018 07:20:02 17:18:02 10 10-01-2018 07:40:02 16:28:02 9 12-01-2018 08:21:03 14:29:03 6 15-01-2018 07:29:02 14:27:02 7 22-01-2018 07:16:03 14:14:03 7 06-02-2018 07:09:02 17:37:02 10 12-02-2018 07:16:02 12:40:02 5 14-02-2018 07:34:02 17:42:02 10 22-02-2018 07:10:03 17:30:03 10 26-02-2018 07:07:03 17:27:03 10 08-03-2018 07:02:03 17:32:03 10 DATE DIRECT DATE GLOBAL 2017-11-13 12:25 1010 2018-05-22 12:23 1407 2017-12-29 11:51 986 2018-05-22 12:37 1397 2017-11-13 11:52 984 2018-05-22 12:24 1394 2017-11-13 12:26 976 2018-05-22 12:49 1384 2017-11-13 10:20 975 2018-05-22 12:50 1374 2017-11-13 11:58 975 2018-05-22 13:06 1366 2017-11-13 12:10 975 2018-05-22 11:51 1358 2017-11-13 10:21 974 2018-03-14 11:36 1349 2017-11-13 12:07 974 2018-05-22 12:28 1346 2017-11-13 12:08 974 2018-05-22 11:20 1340 2017-11-13 12:22 974 2018-03-14 11:34 1331 2017-11-13 12:36 974 2018-05-26 12:54 1324 2017-11-13 11:28 972 2018-05-22 11:19 1322 2017-11-13 11:29 972 2018-05-22 12:51 1318 2017-11-13 11:40 972 2018-05-22 12:52 1313 2017-11-13 11:49 972 2018-03-14 11:35 1305 2017-11-13 11:55 972 2018-05-26 12:45 1301 2017-11-13 11:56 972 2018-05-22 10:48 1295 2017-11-13 11:59 972 2018-05-22 10:39 1289 2017-11-13 11:27 971 2018-05-22 12:38 1287 Maximum values of direct and global irradiances Plotting of one week of april of direct and global and diffuse irradiances Quality assessment ploting of measured versus calculated global irradiance Scattergram of measured versus calculated global irradiance Dates and hours of absolute cavity radiometer measurements Scattergram of absolute cavity and one of the pirheliometers Plotting comparing the three pirheliometers
Transcript of Preliminary results of the first six months operation …...Preliminary results of the first six...
Preliminary results of the first six months operation of the Selegua Station in
Southern MexicoRoberto Bonifaz-Alfonzo1, Adriana González-Cabrera1,, Héctor Estévez-Pérez 1and Mauro Valdés-Barrón1
1Universidad Nacional Autónoma de México, Instituto de Geofísica, Circuito de la investigación científica s/n, Ciudad Universitaria,
Ciudad de México, 04510, México. +52 55 56224141 [email protected]
IntroductionRenewable energy projects depend on proper
technical and financial planning that requires
the availability of reliable information about the
energy resources that can be used for industry
and electricity generation. For the case of solar
energy, in Mexico, it was stablished a reference
solarimetric network of fifteen stations during
the last three years. The last of them
(Selegua), is located in southern Mexico
(Figure 1) in the State of Chiapas very near to
the Guatemala border and has been proposed
as candidate station for the Base Surface
Radiation Network (BSRN).
STATION LOCATION
Latitude: 15°47'2.46" (15.784016°) NLongitude: 91°59'24.63" (-91.990174°) WElevation: 602 (MSL)Local Time GMT -06Topography Type: 2 (Flat, Rural)Surface Type: 15 (grass)
Instruments and dataThe Selegua station was installed and start operations in November 2017. It is the first of its type in Mexico and one of the few covering tropical environments around the world. The station measures bean, diffuse and global radiation and at least once a week measures with an absolute cavity radiometer are taken for reference and quality control of the data, also spectral parameters such as long wave radiation, UVB and illuminance and meteorological data are recorded. The following pictures show some of the instruments, the arrangement and the acquisition systems.
Results
After the firsts months of operations, recorded data show the relevance of a site in this location and allow to analyze particularities of monthly ad
seasonal behavior of solar radiation information. For instance, normal solar radiation values over 400w/m2 are reached very early in the morning until
late in the afternoon even in winter months with low solar angles. Differences of winter and spring skies are also well characterized due to the
cloudiness, humidity, and aerosol components. QA/QC procedures are doing on a daily and monthly basis, such as the daily number of records,
comparisons between calculated and measured global radiation, scatterplots comparing data from pirheliometers and the cavity radiometer among other
processes .
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Global vs Calculated Irradiance
GLOBAL_MEDIDA GLOBAL CALCULADA
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06:28:4807:40:4808:52:4810:04:4811:16:4812:28:4813:40:4814:52:4816:04:4817:16:4818:28:48
Pirheliometers comparison
Cavidad Pirh1 Pirh2
R² = 0.9984
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Cavity vs Pirheliometer 1
Date Starting time Final time Observation hours
08-01-2018 07:20:02 17:18:02 10
10-01-2018 07:40:02 16:28:02 9
12-01-2018 08:21:03 14:29:03 6
15-01-2018 07:29:02 14:27:02 7
22-01-2018 07:16:03 14:14:03 7
06-02-2018 07:09:02 17:37:02 10
12-02-2018 07:16:02 12:40:02 5
14-02-2018 07:34:02 17:42:02 10
22-02-2018 07:10:03 17:30:03 10
26-02-2018 07:07:03 17:27:03 10
08-03-2018 07:02:03 17:32:03 10
DATE DIRECT DATE GLOBAL
2017-11-13 12:25 1010 2018-05-22 12:23 1407
2017-12-29 11:51 986 2018-05-22 12:37 1397
2017-11-13 11:52 984 2018-05-22 12:24 1394
2017-11-13 12:26 976 2018-05-22 12:49 1384
2017-11-13 10:20 975 2018-05-22 12:50 1374
2017-11-13 11:58 975 2018-05-22 13:06 1366
2017-11-13 12:10 975 2018-05-22 11:51 1358
2017-11-13 10:21 974 2018-03-14 11:36 1349
2017-11-13 12:07 974 2018-05-22 12:28 1346
2017-11-13 12:08 974 2018-05-22 11:20 1340
2017-11-13 12:22 974 2018-03-14 11:34 1331
2017-11-13 12:36 974 2018-05-26 12:54 1324
2017-11-13 11:28 972 2018-05-22 11:19 1322
2017-11-13 11:29 972 2018-05-22 12:51 1318
2017-11-13 11:40 972 2018-05-22 12:52 1313
2017-11-13 11:49 972 2018-03-14 11:35 1305
2017-11-13 11:55 972 2018-05-26 12:45 1301
2017-11-13 11:56 972 2018-05-22 10:48 1295
2017-11-13 11:59 972 2018-05-22 10:39 1289
2017-11-13 11:27 971 2018-05-22 12:38 1287
Maximum values of direct and global irradiances
Plotting of one week of april of direct and global and diffuse irradiances Quality assessment ploting of measured versus calculated global irradiance
Scattergram of measured versus calculated global irradiance
Dates and hours of absolute cavity radiometer measurements
Scattergram of absolute cavity and one of the pirheliometers
Plotting comparing the three pirheliometers
