With the rapid growth of China's economy, the power supply is becoming increasingly tight, and energy conservation and energy consumption have become an urgent task for many companies. The year 2007 is an important year for China's economic and social development to enter a critical stage. Energy conservation and consumption reduction to promote economic restructuring and economic growth will be placed in a more prominent strategic position.
Recently, Hunan Changsha Huanghua International Airport responded to the call for energy conservation and consumption reduction proposed by the National “Eleventh Five-Year Planâ€. The central air-conditioning system, one of the most energy-intensive equipment in the airport, was energy-efficiently retrofitted. The problem with the original system is that the monitoring room manually performs the operation to switch the high and low two-speed operation of the motor in each control room. In the low-end operation, it cannot be adjusted immediately with the traffic flow of the terminal building and the season. The temperature effect is difficult to meet the passenger's requirements for comfort and excessive energy waste due to high-end operation.
In order to meet the environmental comfort of the airport passengers and the economical and energy-saving operation of the air-conditioning system, the comprehensive technical factors such as product performance, cost performance and service of several brands have been carefully considered by the Dynamics Department of Changsha Huanghua International Airport and the Hunan Energy Conservation Association. Finally, the Nissin inverter was used to carry out energy-saving renovation of the central air-conditioning fan control system of the airport. The most outstanding advantage of the Japanese inverter is the use of Hitachi 32-bit motor-specific CPU, with automatic torque compensation, automatic slip compensation, dead zone compensation and automatic voltage adjustment, power failure restart and built-in simple PLC, PID and other powerful functions, The fan in the system realizes stepless speed change. At the same time of frequency conversion, the voltage at the output also changes, which saves energy and reduces system noise. The economy and comfort are self-evident.
After the completion of the transformation, the on-site inspection by the Huanghua International Electromechanical Power Division of Changsha City and the representatives of Hunan Energy Conservation Association and the Japanese Industry Company proved that the Japanese industry inverter used this system to achieve significant power saving effect, saving 30%. Fives. And therefore greatly reduce equipment maintenance and maintenance costs, the cost of maintenance and saving of the optical motor in the past six months has reached more than 10,000 yuan; direct and indirect economic benefits are very obvious.
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