China is the largest producer of solar power, but due to double opposition, a large number of domestic companies have fallen into losses and reduced production. With regard to the increase in installed solar power generation capacity, the energy-recovery expert Meng Xianji analyzed that the fundamental reason is that after the United States came to China, the EU has signs of action. In the face of the closure of foreign gates, China hopes to accelerate the development of the market and reduce domestic solar energy. Industrial development pressure.
The overall objective of the renewable energy development during the “12th Five-Year Plan†period: By 2015, the annual renewable energy use will reach 478 million tons of standard coal, of which the annual utilization of commercial renewable energy will reach 400 million tons of standard coal in energy consumption. The proportion in China reached 9.5%.
The indicator for the development of various renewable energy sources is: By 2015, the installed capacity of hydropower will reach 290 million kilowatts, cumulative grid-connected wind power will reach 100 million kilowatts, solar power generation will reach 21 million kilowatts, and cumulative solar heat utilization area will be 400 million square meters. The annual biomass utilization capacity is 50 million tons of standard coal; the total development and utilization of various types of geothermal energy has reached 15 million tons of standard coal, and various types of marine energy plants have reached 50,000 kilowatts.
It is worth noting that at present, the installed capacity of solar power in China is only about 2 million kilowatts, and the original Chinese solar power generation target for 2015 was only 10 million kilowatts, and it was once reported that it has been upgraded to 15 million kilowatts, and this plan is eventually finalized. Target 21 million kilowatts.
According to Liang Zhipeng, a relevant person of the National Energy Administration, photovoltaic is one of the most widely used energy sources for new energy; now the solar power price is RMB 1/kWh in China, and if photovoltaic power generation reaches a level of RMB 0.6/kWh, China will be able to Power generation provides a market that is as broad as wind power. It is believed that the price of solar power will be economical in the next three years and it will be used in large scale in industrial, commercial, and residential life.
A DC motor is any of a class of rotary electrical machines that converts direct current electrical energy into mechanical energy. The most common types rely on the forces produced by magnetic fields. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current flow in part of the motor.
DC motors were the first form of motor widely used, as they could be powered from existing direct-current lighting power distribution systems. A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings. Small DC motors are used in tools, toys, and appliances. The universal motor can operate on direct current but is a lightweight brushed motor used for portable power tools and appliances. Larger DC motors are currently used in propulsion of electric vehicles, elevator and hoists, and in drives for steel rolling mills. The advent of power electronics has made replacement of DC motors with AC motors possible in many applications.
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