First, the technical name: textile industry intelligent air conditioning system energy saving technology
Second, the scope and applicable to your art: the textile industry - cotton spinning workshop, weaving workshop, knitting workshop, garment workshop.
Third, the technology related to energy consumption and carbon emissions Situation
Using computer intelligent control theory, the air-conditioning mechanical and electrical equipment monitoring and management. On the one hand to meet the requirements of the production process and working environment, on the other hand to monitor and protect the normal operation of equipment and effective energy saving. At present, the technology can achieve energy savings 50,000 tce / a, CO2 emission reduction of about 130 000 t / a.
Fourth, the technical content
1. Technology Principle
The use of independent research and development of intelligent software, through the inverter, motor, fan (pump) operating efficiency curve to make dynamic control, allowing the system to optimize energy reasonable run. Control process is as follows:
(1) temperature and humidity control
According deviation parameters return air temperature and humidity with a set value by the CPU control formula, automatic control analysis to determine the supply air temperature, return air temperature is within the control of the requirements to meet the technological and comfort requirements.
(2) damper control
Wind electric valve can be adjusted according to the valve opening degree of indoor and outdoor air enthalpy and dew point temperature. During the transition season, but also the control valve regulating the fresh air enthalpy difference according to the degree of opening, to ensure that the production process requirements and comfort.
(3) Failure chain control
Fail-safe control: When the unit fails, the fans and all kinds of interlocking stop valves.
(4) energy saving control
The automatic climate control system, using the following energy-saving means of:
- Fresh air operation mode
According to the indoor and outdoor temperature and humidity and enthalpy parameters detected automatically analyzed by a computer to calculate whether the ventilation and fresh air ventilation ratio of energy consumption to run the fan only power.
- Transition season with zero energy
During the transition season, the supply of heat source, the use of outdoor air operation mode or fresh air enthalpy control, do not consume heat source, only the fan energy consumption, save a lot of energy.
- Minimum fresh air control
When fresh air ventilation conditions are not satisfied, only the indoor air preheat fresh air to avoid negative energy consumption.
- Enthalpy difference control
Temperature and humidity transmitter automatically calculates the enthalpy of indoor and outdoor air, the new control back, the exhaust valve opening.
- Differential pressure sensor control
In the dust removing device through the inlet of the pressure difference, to determine the machine start and stop time, to dust and energy efficiency.
- Regain control of temperature and humidity
According to regain the characteristics of each step and choose whether or moisture absorption and desorption, choose the right humidity.
- Best start-stop control
According to workshop time, function, climate change and other conditions, the implementation of the best start-stop control.
2. Key Technology
(1) computer optimization of energy-saving control module, sensors and actuators integrated control module;
(2) efficient fan motors and efficient broadband, low harmonic frequency technology systems integration;
(3) energy collection recording and analyzing system;
(4) remote monitoring and early warning system.
Fifth, the main technical indicators
The technology, continuous ambient temperature of the workshop air dust purification, supplementary outdoor fresh air, improve the working environment. The air conditioner features, this system is only used in the textile industry, cotton spinning workshop, weaving workshop, knitting workshop, garment workshop.
Sixth, the technical evaluation, awards and application status
The technology uses industrial PLC as a controller, reliable control stability. The use of advanced automatic control system, centralized monitoring, management and control of electrical equipment, effective functioning and potential of the device.
Seven Typical Applications
Applications Unit: Pacific Textiles Holdings Limited
Technology providers: Zhengzhou Hongda Textile Co., Ltd.
Pacific Textiles Holdings Limited set of knitting, dyeing, printing and finishing integrated production lines, the annual output of about 87 million kg. As of June 2014 a total transformation of one set of workshops B3-3, B2-2 1 set of workshops, B2-3 1 set of workshops, B3-7 2 sets workshop, B3-2 workshop set of six sets in total. After the renovation project annual energy savings 5009tce, annual CO2 reductions 13925t, a total investment of 400 million, the payback period of 1 year.
Eight, promotion prospects and potential for energy saving
The next 5 years, the penetration of technology in the industry can reach about 10% of the total investment required to 1 billion yuan, the estimated annual energy-saving capacity could reach 500,000 tce, estimated annual CO2 reduction capacity 1.32 million t.