Wind Solar Power
System is the source of all the energy on earth，Wind
energy is another form of expression in the Earth's surface. Wind and solar
energy have low energy density, the stability is weaknesses, and they are
influence by geographical distribution, seasonal changes, day and night
alternation. However, Solar and wind energy have Complementary in time and
geographical. And the most sunlight during the day, thewind less, the evening
sun, the light is very weak, but the surface’ temperature of earth has changed
and wind to strengthen large. In summer, Sunlight is strength and wind is
small. In winter, sunlight is weak and wind is strength. Stable is reliable
solar power generation, but it has higher costs now. And wind power costs are
lower, but random, and reliable power supply is poor. Day and night achieve
power generation resources in the conditions of the suitable weather, wind /
photovoltaic generating system can be complementary to each other to improve
the continuity of electricity supply systems, stability and reliability if we
can get them together. Therefore, the wind / PV hybrid generating system is the
best resources of independent power system, in many areas has been widely used.
Solar photovoltaic systems have many factors to effect. the complexity of the
design not only to achieve both long-term reliability to meet the needs of the
load, but also makes the minimum system configuration capacity, investment at
least, must be carried out to optimize the system design, wind power generation
system is also true . But the wind / optical hybrid generating system to the
characteristics of two different power generation systems by combining their
respective strengths in order to achieve the best match, which more than two
separate power system design more difficult and complicated. A lot of wind /
light power generation system while so-called optimized design, in fact, these
two do not really complement each other power generation systems. Along with
the production and living standards are improved, the world's energy
consumption growth. Study shows that, 1965’s energies were increased almost 6
times than 1900. The past 40 50 years, a large portion of energy consumption
come from fossil fuels. Many times the energy crisis led to the recognition
that mineral resources are limited, the world's oil resources can only be
maintained for several decades, people have gradually concern by shifting the
focus to new energy development and utilization up. Expected the next century,
new energy will be more important position of energy in the world. It was the
atomic energy and solar energy can be referred to as the 21st century source.
Energy
is a human life, one of the five elements that is the national economic and
social development of strategic materials. New and renewable sources of energy
mean that mass-energy, wind energy, solar energy, small hydropower, ocean
energy, geothermal energy, hydrogen energy and other energy resources except to
conventional energy sources other than hydropower and large-scale biological.
At present, new sources and renewable sources of energy mainly in the form of
non-commodity energy for the general provision of energy supply in rural areas,
but with the social and economic development of new and renewable sources of
energy is also steadily to change the direction of the commercialization of
energy. Solar and wind energy applications is the relatively wide range of two
renewable energy sources. Solar and wind energy have few advantages than other
conventional energy sources to use. The interior of Solar releasing a huge
light and heat due to nuclear fusion of hydrogen thermo nuclear reaction, which
is the source of solar energy. Hydrogen production capacity in the area of
nuclear fusion, hydrogen burning time of nuclear stability can be more than 60
million years. This means that the sun can be used indefinitely as now at least
60 million years., especially that conventional energy sources are less than
before, it is extremely attractive to more people. Injection of energy the sun,
the earth is only one ten thousandth 20, and the rest are lost to space, went
to BU.The Earth's surface are entitled to receive 7.034×1024 Joule of energy
for one year, which is equivalent to 200 trillion tons of coal combustion
issued by the tremendous heat. According to the calculation of M.R.Gustavson,
solar flux between the earth and the sun is 1400 W / m2, and the Earth's
surface, the energy gained per second for the 350 W / m2, converted to
electricity for one year equivalent to about 1.58×1018 degrees. Wind energy is
a transformed form of Solar, which is estimated by M.R.Gustavson, boundary
layer winds in the global total energy of 1.3×1015 watts, the year of about
1.14×1016 Kilowatt-hour of energy.
At
present, this is equivalent the annual world energy by burning about 3000
times. Fossil fuels, coal and oil resources are uneven geographical, and
industry caused by the uneven distribution of coal and oil transport uneven.
Even it can be powered by electricity, but a number of mountains, islands,
grasslands and high altitude, such as power grids are not easily accessible
place, make full use of the advantages of energy weather will bring
convenience. Although the distribution of solar and Small wind generator
energy also has some limitations, but with the fossil energy, hydropower and
geothermal energy, such as the comparison may be held to be a broader
distribution of energy. Resources such as the world's oil distribution in the
face of the earth do not Uniform, the world's proven oil reserves, only in the
Middle East on the world's total reserves of 57%, and some consumer State-owned
oil more oil reserves and output are relatively more, and some even do not
produce oil. Coal carbon is also very uneven distribution of resources, the
vast majority of the world's coal resources are embedded in the region for more
than 300N, The former soviet union, the united States and china account coal
for about 90% in the world.
No comments:
Post a Comment