The leading energy stocks include Jixin Technology 601218, Shangwei Shares 603333, and Baoxin Energy 000690.
Jixin Technology is a large-scale high-tech enterprise engaged in the production of wind turbine parts and components. The company mainly produces hubs, bases, beams, axles, gearboxes and bearing seats for megawatt wind turbines. The company is an international leader in wind power casting technology and has a provincial engineering technology research center.
Shangwei Co., Ltd.’s business scope includes: production, processing, sales and design: wires, cables and heating appliances; cable trays and cable accessories; operating the export business of the company’s self-produced products; Import and export business of raw and auxiliary materials, instruments, mechanical equipment and accessories required for enterprise production (except for goods restricted and prohibited from import and export by the state); purchase of packaging wood; electrical installation; wholesale of electrical equipment; information technology consulting services; testing services , technology promotion services, etc.
Baoxin Energy, (formerly known as Guangdong Baolihua Industrial Co., Ltd.) is a new energy power company founded on January 20, 1997 and headquartered in Guangzhou City, Guangdong Province. In 1997, Baoxin Energy was listed on the Shenzhen Stock Exchange. In 2013, it won the title of "2013 China's Most Valuable Listed Company".
As shown in Figure A, it is the exterior scene of Jiangsu Rudong Wind Farm, which is the largest wind power base currently constructed in Asia. Xiao Ming after visiting the power plant
Jiangsu Jixin Wind Energy Technology Co., Ltd. (formerly Jiangyin Jixin Machinery Co., Ltd.) was founded in August 2004 with a total investment of more than 1 billion yuan. With an area of nearly 450,000 square meters, it is a large-scale high-tech enterprise engaged in the research, development and production of wind turbine parts. The company mainly produces key components such as hubs, bases, beams, axles, gear boxes and bearing seats for megawatt wind turbines. The company is an international leader in wind power casting technology and has a provincial engineering technology research center.
(1) Different materials of the fan blades can affect the output power of the generator. For example, the lighter the material making up the fan blades, the easier it is to rotate; at the same time, if the surface areas of the fan blades are different, The energy obtained by the fan blades is different, which can also affect the output power, etc.
So the answer is: the material (or surface area) of the blade.
(2) Since the lifting height must be the same, it can be known from h=Vt. Through the lifting time, the speed of lifting can be known, then P=
| W |
| t |
| mgh |
| t | < /tr>
So the answer is: the time to lift the hook code to point A.
(3) Analyzing the data in Table 1, it can be seen that when the quality of lifting the hook code is the same, the greater the wind speed, the shorter the time to lift the hook code to point A, and the greater the output power of the windmill.
So the answer is. is: the greater the wind speed, the greater the output power of the windmill.
(4) Wind energy is a very clean renewable energy, rich in resources, and pollution-free; wind power converts wind energy into electrical energy, and the generator It generates electrical energy through motion, that is, it is made using the principle of electromagnetic induction.
So the answer is: Renewable; electromagnetic induction.
(5) Analyze Table 2 and Table 2. Third, it can be seen that when the wind speed is in the range of 5m/s to 15m/s, the energy obtained by the windmill increases with the increase of the wind speed, and increases exponentially, so the energy obtained by the windmill is proportional to the cube of the wind speed < /p>
So the answer is: The energy obtained by the windmill is proportional to the cube of the wind speed.
(6) When the wind speed is 10m/s, the output power of the windmill is 720kw,
< p>The power generated by the windmill for 1 hour:W electricity = 720kw × 1h = 720kw?h,
① This energy can be used by 10 lights marked "220V 40W" in the classroom Time for lights to work simultaneously:
t=
| W电 |
| P total |
| 720kwh |
| 0.04kw×10 |
②Produces thisHow much energy is required to completely burn the mass of coal:
m=
| Q |
| q |
| 720×3.6×106J |
| 3×107J/kg |
So the answer is: 1800; 86.4.
(7) When the wind speed is 10m/s, the energy obtained in 1s is 120×104J.
The energy obtained by the windmill working for 1h:
W total =120×104J×3600s=4.32×109J,
The electric energy generated by the windmill working for 1 hour:
W electricity=720kw×1h=720kw?h=2.592×109J,
Efficiency of windmill power generation:
η=
| W电 |
| W total |
| 4.32×109J |
So the answer is: 60%.
(8) In order to prevent the wind energy obtained per second from being too large and causing damage to the blades, the force-bearing area of the blades can be appropriately reduced, or the blades can be made of flexible materials.
So the answer is: appropriately reduce the stress area of the blade (or use flexible materials for the blade).