subject: Energy saving technology will be promising in automation [print this page] Energy saving technology will be promising in automation
Recent years, an average of 10% of the GDP growth rate, Energy Dramatic increase consumption, environment, ecology continues to deteriorate. With the rapid economic development, China has become the world's second largest energy consumer, energy consumption accounts for 11% of the world. Statistics show that the unit GDP energy consumption in China is 2.5 times higher than the U.S., 4.5 times higher than the European Union, higher than Japan's 8.7 times higher than the world average of 2.2 times. One main reason is that industrial production "three highs" (high energy consumption, high consumption and high pollution) a very serious problem. Per kilogram of standard coal in China's GDP was only 0.36 U.S. dollars to create the world average of 1.68 U.S. dollars, while Japan was 5.58 U.S. dollars, or about 15 times in our country. These figures not only reflect the process of China's energy consumption, there is a huge waste, also implied that China's huge energy saving potential. Energy conservation and economic development of China not only has a close relationship with the vital interests of each of us closely.
Data statistics, the current domestic proved reserves of 453.896 billion tons of coal. In 2007, China's raw coal output 2.523 billion tons. Projected annual growth rate of 8.2%, from simple calculations indicate that a hundred years time there will be no coal in China. And Oil Reserves of about 60 million tons, only enough for about 20 years mining. Both Dan Youfeng per square degree of value, or the number of years for oil, per capita oil reserves, China is far below the world average, is still a shortage of energy in particular countries. Imagine that we are not energy conservation, twenty years later, three years, a hundred years later our children and grandchildren what means of survival?
So, faced with this grim reality, we are able to remain unmoved? Only the country people, all walks of life have mobilized carefully check their respective fields, in the end where a waste of energy? Can not, there is no way to reduce waste? If we can do unit of GDP energy consumption to reach the world average, we would be a good day too, and may no longer need to import energy, it will not happen so much mine was.
We engage automated, "move" is an important aspect of energy consumption, thus saving our duty to seriously look at our areas of energy waste everywhere, and very serious work we do nothing.
Below we are willing to work in the past few years see how energy-saving automation technology with energy-saving, the problems they face and take what detours which successful experience, write and to share and I hope that everyone's help and corrections.
1, the current energy situation in industry automation technology applications
Mechanical and electrical equipment to achieve energy-saving operation, often some physical quantities, such as: temperature, temperature, pressure, flow, speed control ... ... so by the law of a value or a run, run deviate from this if settings will not achieve the intended energy savings, and even Other Consequences, which use automated technology to a major?? Feedback control, a feedback control system is the regulator. For a long time, everyone used to use the PID (proportional, integral, differential) regulator, using the classical control theory, and more appropriate to calculate P (proportional), I (integral), D (differential) parameters of the control system in terms of Kai, braking and by the disturbance of the process, has a faster dynamic response and small overshoot, the system can reach steady state theory, no worse. However, we see the actual situation is far from a number of mechanical devices, such as frequency control constant pressure water or gas supply system, PID parameter adjustment well, the system all day in the adjustment process. Positive and negative bias, the size is being changed, adjust too frequently, almost no real stability, the more, we see some of the central air-conditioning evaporator, import and export of water to maintain a constant temperature water supply system frequency control PID control water Pump Maximum value only in the high-speed motor (50HZ) and minimum speed value (35HZ) under two different "stable" operation while the other is the transition speed, there's only a very small speed range (eg, 38HZ-39HZ ) will run at speeds not, do not look carefully think it will be stable, in fact, are unstable, is to spend, lower speed methods deceived, not only energy not to mention, back to the safety and security equipment.
