Large scale industrial and commercial comprehensive electric energy conservation

Large scale industrial and commercial comprehensive electric energy conservation

Overview

Based on the conditions of low design efficiency of the water pump, large system design and type-selection and other causes that resulted in low actual operation efficiency of the water pump, in the principles of optimized operation condition and soundest energy consumption, solutions are adopted for overall transformation unfavorable pipelines, replacement of high efficient and energy-saving water pump, motor frequency conversion, automatic control and other measures to achieve energy conservation targets through accurate data acquisition, current system operation condition determination and identification of existing high energy consumption causes of the system.
1.  Technology formation
  • Data acquisition and checking
  • System diagnosis and analysis
  • High efficiency water pump customization and frequency converting control measures
  • Water pump or frequency converting control system installation and operation commissioning
2. Implementation plan
  • To establish professional hydraulic power mathematic model and parameter acquisition standard, collect industrial circulating water system theory data, including water pump, cooling tower, heat exchange equipment and accessories; determine the high energy consumption causes, identify the best working condition points and raise the optimized matching plans through checking and verification of current operation condition parameters and equipment rated parameters;
  • To eliminate high energy consumption due to irrational system configuration through rectification of unfavorable factors; achieve the best energy saving effect by reducing the high energy consumption due to large load variation, to seek both temporary and permanent solutions;
  • To customize special high efficiency energy saving water pump or implement frequency converting control based on the actual working condition and special technical parameters of the system. The high efficiency energy saving water pump is dedicated for actual working condition parameters and structure patterns, which would be customized for one-to-one correspondence, irreplaceable.
3. High efficiency water pump design
  • The water pump design approaches include similarity conversion approach, velocity coefficient approach, unitary theoretical design approach, three-dimensional flow design approach.
  • The models we adopt are all required to pass computer simulation technology CFD simulation verification after completion of design and before production, and the pumps are also required to pass the tests and inspections before delivering to the clients.
4. Water pump frequency converting control
  • Suitable for: the system of large daily variation factor of flow and required constant-pressure water supply;
  • Principle: to utilize the on-off action of power semiconductor device to convert the main-frequency power supply (50Hz or 60 Hz) to AC power sources of various frequencies, to realize variable speeds of the motors, and reduce water pump energy consumption;
  • Features:frequency control, motor soft start, improvement of running accuracy, alternation of power factor, over current, under voltage, overload protection and other functions;

 5. Quality Assurance
 

  • The implementation of this project guaranteed the system’s operating conditions as per requirements (the transformation was implemented in steps, starting from the stand-by pumps, so as to avoid impact on the production).
  • The warranty and maintenance costs incurred within the warranty period will be covered completely by our company. After the warranty period, the supplier will be responsible for life-long maintenance for the equipment so supplied, with material costs only.

 

6. Application scope
  • Central AC water system
  • Enterprise industrial circulating water system
  • Large and medium scale pump station water system
7. Application effects
  • For the projects that have been implemented with energy conservation technical innovation, through the survey and measurement before and after  technical innovation, the water pump energy consumption and accumulative operation hours, the hourly energy saving, accumulative energy saving and accumulative energy saving earnings may be calculated accurately. As per our experiences, the energy saving for closed pipeline network system may reach 30% on the average, taking the 100kW water pump that received less transformation in the pipeline system for example, if calculated as per 30% energy saving, of 6000 hours yearly operation, at the tariff of 0.6RMB, the annual accumulative energy saving earning would be 100 ×0.3 ×6000 ×0.6=108000 RMB.

 

8. Cause analysis on low water pump efficiency and high energy consumption:

  • The water pumps and motors were of low designed efficiency and out-dated manufacturing technologies.
  • The system design type-selection was too large or the combination of the pump sets were irrational, and the other causes such as no corresponding adjustment to the water pumps as the variation of loads, which resulted in serious deviations of the water pumps from their optimal operating point;
  • 1.  Technology formation
    • Data acquisition and checking
    • System diagnosis and analysis
    • High efficiency water pump customization and frequency converting control measures
    • Water pump or frequency converting control system installation and operation commissioning
    2. Implementation plan
    • To establish professional hydraulic power mathematic model and parameter acquisition standard, collect industrial circulating water system theory data, including water pump, cooling tower, heat exchange equipment and accessories; determine the high energy consumption causes, identify the best working condition points and raise the optimized matching plans through checking and verification of current operation condition parameters and equipment rated parameters;
    • To eliminate high energy consumption due to irrational system configuration through rectification of unfavorable factors; achieve the best energy saving effect by reducing the high energy consumption due to large load variation, to seek both temporary and permanent solutions;
    • To customize special high efficiency energy saving water pump or implement frequency converting control based on the actual working condition and special technical parameters of the system. The high efficiency energy saving water pump is dedicated for actual working condition parameters and structure patterns, which would be customized for one-to-one correspondence, irreplaceable.
    3. High efficiency water pump design
    • The water pump design approaches include similarity conversion approach, velocity coefficient approach, unitary theoretical design approach, three-dimensional flow design approach.
    • The models we adopt are all required to pass computer simulation technology CFD simulation verification after completion of design and before production, and the pumps are also required to pass the tests and inspections before delivering to the clients.
    4. Water pump frequency converting control
    • Suitable for: the system of large daily variation factor of flow and required constant-pressure water supply;
    • Principle: to utilize the on-off action of power semiconductor device to convert the main-frequency power supply (50Hz or 60 Hz) to AC power sources of various frequencies, to realize variable speeds of the motors, and reduce water pump energy consumption;
    • Features:frequency control, motor soft start, improvement of running accuracy, alternation of power factor, over current, under voltage, overload protection and other functions;

     5. Quality Assurance
     

    • The implementation of this project guaranteed the system’s operating conditions as per requirements (the transformation was implemented in steps, starting from the stand-by pumps, so as to avoid impact on the production).
    • The warranty and maintenance costs incurred within the warranty period will be covered completely by our company. After the warranty period, the supplier will be responsible for life-long maintenance for the equipment so supplied, with material costs only.

     

    6. Application scope
    • Central AC water system
    • Enterprise industrial circulating water system
    • Large and medium scale pump station water system
    7. Application effects
    • For the projects that have been implemented with energy conservation technical innovation, through the survey and measurement before and after  technical innovation, the water pump energy consumption and accumulative operation hours, the hourly energy saving, accumulative energy saving and accumulative energy saving earnings may be calculated accurately. As per our experiences, the energy saving for closed pipeline network system may reach 30% on the average, taking the 100kW water pump that received less transformation in the pipeline system for example, if calculated as per 30% energy saving, of 6000 hours yearly operation, at the tariff of 0.6RMB, the annual accumulative energy saving earning would be 100 ×0.3 ×6000 ×0.6=108000 RMB.

     

    8. Cause analysis on low water pump efficiency and high energy consumption: