Introduction of Computer for Heat Calculation of Marine Exhaust Gas Economizer

Abstract

It is a conventional way to make manually heat calculation of marine exhaust gas economizer, including selection of heat transfer rate. However, manual way prohibits the correctness of the calculation due to enormous number of data such as exhaust gas output from main engine functionized by room temperature, cooling sea water temperature, engine powers, heat transfer rate indexed from the tube dimension and its arrangement, etc. For the same reason, analysis of evaporation test results is very difficult to be carried out up to the utmost completeness. Confirmation of the economizer capacity, especially of its heat transfer rate, can not be made sufficiently. Recently we had the first opportunity to make an analysis of the actual results of an economizer capacity and we made a calculation program for electronic computer. Here we should like to explain the outline of the program. Another program for design of exhaust gas economizer is now in hand, which will be presented in another chance in future.