EVC1 Intelligent Fan Control
On large vessels the Pressure and Temperature control becomes a significant cost, and has the potential to create packaging problems because of the large fans. The EVC1's Intelligent Fan Control Logic allows the fans to change from intake to exhaust as the situation requires. This type of system design is an evolution of the full pressure and temperature controls that have been in use for years but have never taken full advantage of the fans capacities.

In the diagram a four fan system is shown. As the main engines are brought online at the dock, the system uses two fans as intakes and two as exhaust providing adequate exhaust air for cooling. As the main engines increase in RPM and the combustion air requirement reaches the capacity of the two dedicated intake fans, one of the exhaust fans performs a controlled stop and reverses.

The fourth fan remains controlled by temperature until the combustion air requirements reach the capacity of the other fans, and then becomes an intake as well. Because of the large volume of air through the space for combustion, the exhaust air required for cooing is completely taken care of by the main engines freeing the exhaust fans to provide combustion air.

In the traditional pressure/temperature configuration the capacity of the exhaust fan is mostly unused while underway. This configuration allows the use of much smaller intake fans because very little capacity is wasted throughout the entire operating range of the engines due to full utilization of the exhaust fans. The principals of this system can be applied to two fan systems as well, with slightly less flexibility.

    ADVANTAGES:
  • Precise control of pressure and temperature
  • Little or no cost increase over a traditional four fan system
  • Reduced opening and moisture eliminators size
  • Reduced fan sizes makes packaging easier
  • Automatic operation both underway and dockside
    DISADVANTAGES:
  • Fans sizing becomes critical
  • Significant Cost
  • Complexity
  • Large electrical loads
<< Back   Next >>
Livos Technologies, LLC
3201 South East Railroad Avenue · Stuart, Florida 34997 · Office: 772.220.1524 · Fax: 772.220.1592 · Email: info@livostech.com