What is the distribution of solar energy resources in the world?
The radiant power emitted by the sun into space is 3.8x1023 kW, of which one billion is reaching the Earth's atmosphere. Solar energy reaching the Earth's atmosphere is reflected by the atmosphere and 30% is absorbed by the atmosphere. 47% reach the surface of the earth, and its power is 80 billion kW, which means that the sun's energy per second to the earth is equivalent to the amount of heat released by burning 5 million tons of coal.
The total annual energy consumption of human beings around the world is only equivalent to the energy that the sun shines on the Earth's surface within 40 minutes.
International solar resource distribution
According to the international solar thermal utilization regional classification, the regions with the best solar radiation intensity and sunshine time in the world include North Africa, Middle East, Southwestern United States and Mexico, Southern Europe, Australia, South Africa, East and West Coast of South America and Western China. According to the recommendations of the German Aerospace Technology Center (DLR), solar thermal power generation technology and economic potential data and their technical potentials in different regions are based on solar year irradiance measurements greater than 6480 MJ/m2, and economic potential based on solar year irradiance measurements greater than 7200MJ/m2.
The North African region is one of the regions with the strongest solar radiation in the world.
The potential for solar thermal power generation in Morocco, Algeria, Tunisia, Libya and Egypt is high. The total annual solar radiation in Algeria is 9720 MJ/m2, and the technical development volume is about 169,440 TW·h per year. The total solar radiation in Morocco is 9360 MJ/m2, and the technology development is about 20151 TW·h per year. The total solar radiation in Egypt is 10080 MJ/m2, and the technology development is about 73,656 TW·h per year. Countries with a total solar radiation of more than 8280 MJ/m2 are also countries such as Tunisia and Libya. Algeria has a land area of 2381.7km2. The total annual solar radiation in coastal areas is 6120MJ/m2, and the total solar radiation in the highlands and Sahara is 6840~9540MJ/m2. 82% of the total land in the country is suitable for solar thermal power generation. Station building.
World solar map
Southern Europe's annual total solar radiation exceeds 7200 MJ / m2.
These countries include Portugal, Spain, Italy, Greece and Turkey. Spain's total solar radiation is 8100 MJ / m2, and the technology development is about 1646 TW·h per year. Italy's annual total solar radiation is 7200 MJ / m2, and the technology development is about 88 TW·h per year. The total amount of solar radiation in Greece is 6840 MJ / m2, and the annual technological development is about 44 TW·h. Portugal's total solar radiation is 7560 MJ / m2, and the technology development is about 436 TW·h per year. The amount of technology developed in Turkey each year is about 400 TW·h. Southern Spain is one of the most suitable areas for building solar thermal power stations. The country is also one of the countries with the highest level of solar thermal power generation and the largest number of solar thermal power plants.
Solar radiant energy is very high in almost all parts of the Middle East.
The total annual solar radiation in countries such as Israel, Jordan and Saudi Arabia is 8,640 MJ/m2. The total annual solar radiation in the UAE is 7920 MJ/m2, and the technical development volume is about 2708 TW·h per year. The total solar radiation in Israel is 8640 MJ/m2, and the technology development is about 318 TW·h per year. The total solar radiation in Iran is 7920 MJ/m2, and the technology development is about 20 PW·h per year. The total solar radiation in Jordan is about 9720 MJ/m2, and the amount of technology development is about 6434 TW·h per year. Israel's total land area is 20,330 km2; the Negev Desert covers half of the country's land and is one of the best areas for solar energy utilization. Israel's solar thermal utilization technology is among the highest in the world. China's first 70KW solar tower thermal power station was built using Israeli technology.
The United States is also one of the most solar-rich regions in the world.
According to the statistics of 239 observatories in the United States from 1961 to 1990, the total annual solar radiation in the first-class regions of the country is 9198-10512 MJ/m2. The first-class regions include all of Arizona and New Mexico, California, Nevada, Utah. Colorado and the southern part of Texas are 9.36% of the total area. The total solar year irradiation in the second category is 7884 to 9198 MJ/m2, including Utah, Wyoming, Kansas, Oklahoma, Florida, Georgia, and South Carolina, in addition to the rest of the states listed in the first category. , accounting for 35.67% of the total area. The total annual solar radiation in the three types of areas is 6570~7884MJ/m2, including most of the northern and eastern parts of the United States, accounting for 41.81% of the total area. The total annual solar radiation in the four types of areas is 5256-6570 MJ/m2, including most of Alaska, accounting for 9.94% of the total area. The total annual solar radiation in the five types of areas is 3942-5256 MJ/m2, including only the northernmost part of Alaska, accounting for 3.22% of the total area. The outer islands of the United States, such as Hawaii, belong to the second category. The southwestern United States has a higher average annual temperature and a certain amount of water. There is no cold in winter. Although it belongs to the hilly area, there are many flat areas. As long as it avoids the windy area, it is a very good solar thermal power generation area.
Australia's solar energy resources are also very rich
The total annual solar radiation in the first-class regions of the country is 7621～8672MJ/m2, mainly in the northern part of Australia, accounting for 54.18% of the total area. The total solar year irradiation in the second category is 6570～7621MJ/m2, including Central Australia, accounting for 35.44% of the national area. The total annual solar radiation in the three types of areas is 5389-6570 MJ/m2, accounting for 7.9% of the national area in southern Australia. The four types of areas with total solar radiation less than 6570 MJ/m2 accounted for only 2.48%. The vast areas of central Australia are sparsely populated and deserted, suitable for large-scale solar energy development and utilization. Recently, Australia has also proposed a large-scale solar energy development and utilization investment plan to increase the utilization rate of renewable energy.
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