■太陽光発電: Erbsモデルによる斜面日射量の推定
          (2011年6月〜2012年2月)

 広島地方気象台における2011年6月から2012年2月までの、日別の全天日射量と斜面日射量の関係を計算した結果を示します。
 ・計算式は−> Erbs&METPV-3 計算式
 ・albedo = 0.2、屋根傾斜 28.8°、方位 25°(ほぼ南南西)
 ・斜面E: Erbsモデルにより計算された斜面日射量
 ・斜面M: METPV-3モデルにより計算された斜面日射量
 ・斜面E/全天: 斜面E/ 全天日射量の比
 ・斜面M/全天: 斜面M/ 全天日射量の比
 ・斜面M/斜面E: 斜面M/ 斜面Eの比
 ・日射量の単位は kWh/m2 (ikWh = 3.6MJ)

 ErbsモデルとMETPV-3モデルによる斜面日射量の値には大きな違いはありません。

年/月/日全天日射斜面 E斜面 M斜面E/全天斜面M/全天斜面M/斜面E
2011/6/13.063.023.020.9870.9850.997
24.844.644.670.9570.9631.006
36.646.516.540.9790.9851.006
46.906.606.580.9570.9540.997
53.753.533.550.9430.9451.003
65.855.575.580.9530.9541.001
72.021.921.920.9490.9501.001
84.003.883.860.9700.9650.995
95.435.205.210.9580.9601.002
100.980.930.930.9500.9501.000
114.764.764.741.0010.9960.995
120.690.650.650.9500.9501.000
133.323.163.170.9530.9551.001
144.904.474.460.9110.9090.999
153.513.333.330.9490.9501.001
161.371.301.300.9500.9501.000
176.145.965.990.9720.9771.005
181.971.871.870.9510.9510.999
191.891.801.800.9500.9501.000
201.481.411.410.9510.9511.000
216.716.606.600.9820.9841.001
222.742.612.610.9510.9501.000
235.024.794.810.9530.9571.004
246.666.356.350.9540.9531.000
256.566.246.250.9520.9531.001
262.982.822.830.9480.9501.002
271.111.061.060.9500.9501.001
284.264.044.090.9480.9581.011
297.357.097.130.9660.9711.005
306.566.246.250.9520.9521.000
6月合計123.46118.37118.55   
平均4.123.953.950.9590.9601.002
2011/7/12.031.961.960.9660.9640.998
25.475.335.350.9750.9791.004
32.081.991.990.9560.9561.000
40.840.790.790.9500.9501.001
56.706.436.450.9600.9621.003
62.041.871.910.9180.9351.018
71.321.261.260.9510.9510.999
84.474.324.290.9660.9600.994
97.226.736.720.9320.9320.999
107.377.037.040.9530.9551.002
116.465.915.860.9150.9070.992
127.236.916.990.9560.9681.012
135.415.155.200.9520.9601.009
147.667.247.210.9450.9400.996
157.897.387.360.9350.9330.997
167.797.327.290.9390.9350.995
177.477.087.050.9480.9440.997
183.062.912.910.9510.9511.000
191.881.781.780.9500.9480.997
205.225.165.130.9890.9820.993
214.774.554.550.9540.9541.000
226.936.666.700.9600.9661.006
236.986.856.870.9820.9841.002
247.176.986.970.9740.9730.998
253.623.533.520.9750.9710.996
265.004.854.880.9700.9751.004
274.114.033.990.9820.9720.990
286.536.416.440.9820.9871.005
295.965.715.690.9590.9560.996
304.454.324.350.9710.9771.005
313.853.513.480.9110.9040.992
7月合計158.98151.98151.96   
平均5.134.904.900.9560.9561.000
2011/8/15.024.884.890.9720.9741.002
24.374.284.300.9810.9851.004
36.336.416.411.0121.0131.001
47.277.067.040.9710.9690.998
55.234.754.720.9090.9020.993
65.164.964.980.9620.9661.004
76.676.246.240.9350.9361.001
85.085.135.161.0101.0151.005
96.266.306.301.0061.0071.001
105.875.905.931.0051.0101.005
116.336.136.080.9680.9600.992
126.045.935.950.9820.9861.004
136.926.926.951.0001.0041.004
146.086.006.000.9870.9871.000
154.564.574.581.0011.0031.003
164.684.504.490.9620.9610.998
172.462.502.511.0151.0231.008
181.951.841.830.9430.9350.991
192.342.212.210.9450.9461.001
200.960.920.920.9520.9510.999
213.433.603.551.0491.0330.985
222.492.322.330.9330.9341.002
231.071.021.020.9520.9510.998
244.274.104.090.9600.9560.996
255.315.105.010.9600.9440.984
265.746.096.131.0601.0661.006
275.125.135.161.0021.0081.006
285.375.535.561.0311.0371.006
295.645.665.691.0021.0081.006
305.405.395.420.9981.0051.007
315.605.845.751.0431.0260.984
8月合計149.03147.19147.20   
平均4.814.754.750.9880.9881.000
2011/9/13.102.962.960.9550.9540.999
20.540.520.520.9510.9511.000
32.562.592.601.0111.0141.003
44.735.004.961.0571.0490.993
56.066.306.261.0391.0320.994
66.466.796.811.0511.0551.003
76.687.067.121.0571.0651.007
86.216.666.751.0721.0861.013
93.803.813.751.0020.9860.984
106.056.366.361.0501.0501.000
115.285.665.661.0711.0711.001
125.936.236.221.0501.0480.998
136.246.776.851.0851.0971.011
146.156.636.721.0781.0931.014
154.845.044.991.0401.0300.991
162.161.991.980.9200.9180.997
171.771.691.690.9560.9561.000
183.323.393.361.0201.0130.993
192.932.772.760.9470.9420.995
200.920.880.880.9530.9510.998
212.412.332.330.9670.9681.001
226.247.117.121.1401.1421.002
235.936.626.641.1161.1191.002
246.086.916.981.1361.1481.010
255.465.916.001.0841.0981.014
263.663.863.941.0541.0751.020
275.516.166.241.1171.1321.013
284.354.464.491.0251.0321.006
292.402.382.330.9930.9700.977
301.051.011.000.9550.9510.996
9月合計128.84135.84136.24   
平均4.294.534.541.0541.0571.003
2011/10/14.885.295.161.0861.0580.975
22.953.003.001.0161.0161.000
35.566.626.641.1921.1951.002
45.146.086.161.1821.1981.013
50.720.680.680.9530.9510.998
65.175.855.901.1321.1401.007
75.216.186.251.1871.2011.012
85.366.456.561.2051.2241.016
94.775.665.791.1871.2131.022
104.605.215.261.1341.1441.009
112.292.242.210.9790.9660.987
124.835.825.941.2041.2291.020
132.552.662.631.0451.0310.987
140.720.680.680.9510.9511.000
151.751.691.670.9650.9550.989
164.685.475.611.1691.1981.025
173.153.173.171.0051.0061.002
185.026.256.401.2451.2751.024
194.996.296.431.2591.2871.022
204.745.866.061.2351.2771.034
210.790.750.760.9450.9511.007
221.832.272.081.2421.1390.917
233.543.933.941.1121.1141.002
243.734.324.291.1591.1500.992
252.312.322.251.0070.9760.969
264.656.016.111.2921.3151.018
274.686.056.231.2931.3311.029
281.801.791.750.9970.9730.976
291.851.851.831.0010.9870.986
300.660.630.630.9560.9520.995
314.515.896.021.3061.3351.022
10月合計109.41127.03128.07   
平均3.534.104.131.1611.1711.009
2011/11/14.295.625.831.3081.3571.038
21.671.621.600.9730.9590.985
32.052.142.151.0421.0481.005
43.664.434.591.2111.2561.038
50.370.350.350.9540.9520.998
61.531.531.470.9980.9610.963
73.614.454.331.2321.2000.974
82.823.203.101.1351.1000.970
92.312.392.361.0361.0230.988
101.631.601.570.9820.9580.976
112.322.512.471.0801.0610.982
123.294.034.261.2241.2941.057
132.973.563.571.1971.1991.002
143.414.564.841.3381.4201.061
153.214.184.311.3031.3421.030
163.875.405.631.3951.4531.042
172.743.293.401.2001.2381.032
180.320.310.310.9540.9520.999
191.071.121.071.0501.0030.955
203.564.925.071.3841.4271.031
213.525.175.071.4691.4400.980
223.655.045.201.3821.4251.031
231.171.391.511.1861.2841.082
242.723.423.591.2591.3201.048
251.962.192.281.1161.1651.044
263.675.315.531.4481.5061.040
272.412.742.821.1371.1711.030
281.361.341.300.9850.9610.976
292.493.153.211.2631.2891.020
302.032.342.411.1511.1841.029
11月合計75.7093.3295.20   
平均2.523.113.171.2331.2581.020
2011/12/10.970.950.940.9830.9720.989
21.041.061.071.0191.0261.007
30.890.870.900.9741.0111.038
42.863.953.851.3831.3460.973
52.803.653.721.3051.3291.018
62.463.133.311.2751.3501.059
71.461.481.481.0171.0140.997
81.061.141.201.0761.1291.050
92.733.473.581.2711.3121.032
102.593.583.371.3831.3010.941
111.872.051.981.0951.0590.967
121.601.831.731.1471.0850.946
133.104.414.541.4221.4661.031
143.004.254.421.4171.4731.039
152.092.592.691.2421.2921.040
162.192.612.661.1921.2191.023
173.475.395.291.5551.5250.980
182.092.422.451.1591.1711.010
193.054.374.491.4341.4741.028
202.753.613.821.3121.3901.059
211.912.092.151.0941.1241.028
221.812.012.121.1121.1751.056
231.812.001.971.1041.0880.986
242.222.722.751.2241.2341.008
251.922.162.211.1301.1541.022
262.312.842.881.2281.2471.015
272.072.472.441.1921.1810.990
282.954.134.371.4021.4831.058
291.361.371.441.0061.0521.046
302.152.602.571.2081.1970.991
313.104.404.631.4211.4941.051
12月合計67.6685.6287.03   
平均2.182.762.811.2651.2861.016
2012/1/10.970.940.940.9700.9761.006
22.382.882.971.2101.2471.030
32.493.143.181.2581.2761.014
42.262.812.991.2421.3251.067
52.392.872.931.2001.2251.021
62.222.742.821.2351.2701.029
73.044.124.111.3561.3530.998
83.364.925.081.4611.5111.034
92.122.382.501.1211.1761.048
102.172.522.541.1631.1711.007
112.322.722.841.1721.2231.044
122.793.563.401.2761.2190.955
131.932.182.201.1291.1361.005
142.573.443.531.3381.3711.025
151.281.241.230.9700.9590.988
160.470.450.450.9560.9510.995
173.464.945.131.4271.4851.040
181.881.951.991.0381.0571.018
190.550.530.530.9570.9510.994
201.311.321.311.0030.9970.994
211.201.261.261.0511.0480.997
222.953.673.581.2461.2120.973
233.104.264.241.3741.3670.995
243.003.703.591.2331.1970.971
252.893.753.571.2981.2380.954
263.634.884.781.3461.3170.978
272.653.113.221.1731.2151.036
282.282.472.541.0801.1131.030
292.342.602.711.1151.1601.041
302.923.483.541.1921.2131.018
313.454.354.381.2621.2701.006
1月合計72.3989.2090.07   
平均2.342.882.911.2321.2441.010
2012/2/12.683.974.031.4821.5041.015
23.454.384.251.2681.2330.972
32.863.213.171.1221.1070.987
43.514.264.181.2151.1900.979
51.261.221.210.9750.9640.988
61.241.231.200.9940.9670.973
70.930.900.890.9710.9580.986
83.474.214.011.2131.1550.952
93.394.073.881.2021.1440.952
102.953.213.221.0891.0911.002
114.115.385.281.3081.2850.982
124.536.036.091.3311.3441.010
130.440.420.420.9540.9520.997
140.710.750.751.0521.0561.004
151.321.281.280.9690.9640.995
162.923.213.231.1021.1081.005
173.854.844.471.2581.1610.922
183.123.713.681.1871.1780.993
194.425.295.191.1991.1760.980
205.066.566.571.2981.2991.001
211.401.341.340.9580.9530.995
220.850.810.810.9540.9520.998
232.432.742.761.1261.1371.010
244.645.695.801.2261.2481.018
251.341.291.280.9690.9600.991
261.691.651.640.9810.9750.994
274.124.524.441.0971.0770.982
282.652.652.620.9990.9890.990
292.292.272.200.9930.9630.970
2月合計77.6291.1289.89   
平均2.683.143.101.1741.1580.986
 (注)ErbsモデルおよびMETPV-3モデルにおける斜面日射量の計算式では、夕方など高度角0度付近で
    値に乱れが出ることがあるため、後日計算式を修正した。
    上表の値は修正前の値であるが、月合計値の誤差は高々0.5%程度である。

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