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17-19 Solar Energy Resource Zoning

Author: Source: Datetime: 2016-12-26 09:48:48

China's land span from south to north, from west to east in the distance are more than 5000km, with a total area of 960X104km2 or more, accounting for 7% of the world's total land area, ranking third in the world. In this vast and fertile land, has a very rich acres of solar energy resources, the country's total solar radiation is 3340-8400MJ (m2•a), the median value of 5852MJ (m2•a). From the distribution of total annual solar radiation in Tibet, the sea, Xinjiang, Gansu, Inner Mongolia, southern Shanxi, northern Shaanxi, Hebei, Shandong, Liaoning, western Jilin, central and southwestern Yunnan, southeastern Guangdong, Fujian Southeast , The eastern and western Hainan Island and the southwest of Taiwan Province, the vast areas of solar radiation is great. Especially in the Qinghai-Tibet Plateau region, where the average height above 4000m, the atmosphere is thin and clean, transparent, low latitude, long sunshine. For example, the city of Lhasa, known as the "City of Light", had an average sunshine duration of 3005,7 hours in 1961-1970, an average sunny day of 68% and an average sunny day of 108.5 days and a cloudy day of 98.8 days D, the average annual cloud amount is 4.8, the total solar radiation is 8160MJ (m2•a), higher than the other provinces and regions of the same latitude. Sichuan and Guizhou provinces and Chongqing, the country's total annual solar radiation the smallest, especially the Sichuan Basin, where more rain and fog, sunny days less. For example, Chongqing, known as the "fog", has an average sunshine duration of only 1152.21 hours, a relative sunshine of 26%, an average sunny day of 24.7 days and a cloudy day of 244.6 days. Other regions of the total solar radiation in the middle.


China's solar energy resource distribution is mainly held by: high-value solar energy centers and low-value centers are in the latitude 22 ° -35 ° this area, the Qinghai-Tibet Plateau is the high value of the Sichuan Basin is a low value center; The western region is higher than the eastern region, with the exception of the Tibet Autonomous Region and the Xinjiang Autonomous Region. As the majority of the southern cloudy and rainy, in latitude 30 ° -40 ° region, the distribution of solar energy and solar energy with the general changes in the law with the latitude of the contrary, the solar energy is not increased with the latitude decreases, but with the increase in latitude increase.


Obviously, the solar energy resource distribution has the obvious regionality. This distribution reflects the solar energy resources by climate, geography and other conditions. According to the amount of solar radiation exposure, China can be divided into four solar energy resource zones, the four resource zones with the index shown in Table 1-7

Table 1-7 Indicators of exchange for four resource zones

resources are signed

resource band name

indicators (per year)

adequate resources

≥6.7GJ/m2

rich in resources

5.4-6.7GJ/m2

resources generally

4.2-5.4GJ/m2

lack of resources

<4.2GJ/m2


China's solar energy resources and other countries at the same latitude, out of the Sichuan Basin and its adjacent areas, the vast majority of solar energy resources are quite rich, and the United States is similar to Japan and Europe conditions are much better, especially the Tibetan Plateau Central and southern regions of the solar energy resources are particularly rich, close to the fashion of the most famous Sahara desert. Table 1-8 compares the total annual solar radiation of some sites in Tibet and abroad. The data show that China's solar energy resources 2/3 areas of high or high value, the other 1/3 of the vast majority of areas are also available. In recent years, for the same time with other regions have the same criteria, the industry are shown in Table 1-7 as shown in the four resource allocation indicators

Table 1-8 Comparison of Total Annual Solar Radiation in Tibet and Some Domestic and Foreign Sites

place names

annual total radiation

/(MJ/GJ/m2)

 

place names

annual total radiation

/(MJ/GJ/m2)

 

place names

annual total radiation

/(MJ/GJ/m2)

 

Lhasa

7784.2

Harbin

4622.2

Helsinki

3307.6

Nagqu

6557.2

Urumqi

5304.7

Stockholm

3558.8

Qamdo

6137.1

Golmud

7004.5

Moscow

3726.3

Shiquanhe

7807.6

Lanzhou

5442.8

Hamburg

3433.2

Rongbuk Temple

8369.4

Hohhot

6108.5

Warsaw

3516.9

 

 

Yinchuan

6102.2

London

3642.5

 

 

Beijing

5564.3

Paris

4019.3

 

 

Shanghai

4672.5

Vienna

3893.7

 

 

Chengdu

3805.5

Venice

4814.8

 

 

Kunming

5271.2

Lisbon

6908.2

 

 

Guiyang

3805.8

Tokyo

4228.7

 

 

Wuhan

4672.5

New York

4731.1

 

 

Guangzhou

4479.9

Singapore

5735.9

 

 

 

 

Sahara Desert

>8373.6


Table 1-9 Solar energy resources data of 30 provinces (municipalities and autonomous regions) in mainland China

Solar energy resources data

Note: The data from the Institute of Electrical Engineering, Chinese Academy of Sciences in 2009 photovoltaic power generation training course notes

For the convenience of use, Table 1-9 solar energy data of 30 provinces (municipalities and autonomous regions) of mainland China, and Table 1-10 the average annual power generation systems in different regions of the country are only for reference.

Table 1-10 Annual Utilization Time of Average Power Generation System in Different Regions of China
Annual Utilization Time of Average Power Generation System in Different Regions

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