CHARGE-AIR TEMPERATURE CONTROL IN FERRY SHIPS
Ferries, which dispense with tugs at the terminal ports, must be able to vary their propulsion power between 10 and 100% very quickly, a requirement that introduces problems in the regulation of the charge-air temperature of the main Diesel engines. Thermal overloading of the engine is possible, and, in particular, there is a danger of damage to the air cooler. The Authors briefly describe a theoretical and experimental study for the selection of control arrangements for obviating these difficulties. The study was made for the Rugen, A twin-screw ferry with four medium-speed engines. The control requirements, and different methods of meeting them, are dicussed and compared under the headings:-- 1. Determination of Characteristics for the Charge-Air Cooling Control System (i-- Detemination of static transfer behaviour; ii--Determination of transient response functions). 2. Charge-Air Temperature Regulation (i--Single-loop control system with proportional action controller; ii--Single-loop control system with proportional/integral action controller; iii--Control system with disturbance-variable feed-forward action). 3. Use of Electronic Controllers. Test results showed that a disturbance-variable feed-forward control system fulfilled all the requirements for controlling the charge-air temperature in ferries, an advantageous practical solution being the non-steady electronic controller with steady feedback, in conjunction with an integrally operating final-control element.
VEB AutobahnbaukombinatTemplinestrasse 19
- Hein, D
- Publication Date: 1977-3
- Features: References;
- Pagination: 3 p.
- Volume: 9
- TRT Terms: Atmospheric temperature; Combustion; Cooling systems; Diesel engines; Engine operation; Ferries; Marine transit; Performance; Superchargers; Temperature control (Structures); Thermal stresses
- Old TRIS Terms: Air temperature regulators; Combustion control; Diesel control systems; Diesel performance; Engine overloading; Supercharging
- Subject Areas: Marine Transportation; Public Transportation; Vehicles and Equipment;
- Accession Number: 00163437
- Record Type: Publication
- Source Agency: British Ship Research Association
- Files: TRIS
- Created Date: Oct 29 1977 12:00AM