ENGINE HULL-COOLING SYSTEM FOR PLANING BOATS: A CFD DESIGN APPROACH

摘要

The aim of present study is to determine design and analysis settings, valid in the general case, in order to calculate and match the heat exchanging performance of closed circuit engine cooling systems, as an alternative to ordinary open circuit systems.rnIn particular operating conditions, i.e. shallow or polluted waterways, rivers, ports; open circuit filtration systems are prone to clogging, which can result in unsafe engine or system operation. With the present study, designers can exploit a valid and verified calculation method which allows to produce closed circuit heat exchangers embedded within the hull plating of metal vessels, the heat exchange area depending on the thermal energy to be dissipated, the seawater temperature and the vessel speed. The installed heat exchange power is suitable to sustain prime movers as well as refrigeration, or any other system requiring heat dissipation.rnThe purposed analysis method has been extensively implemented within the design of a particular experimental craft. Sea-trials conducted on the supplied boat allowed the verification of the calculated results resulting in a precise definition of the setting parameters. The simulation settings so defined will allow a relatively quick design method for heat exchanging plating.