Optimizing the values of the selected scalar quantities in designing a condenser of marine steam turbine according to the adopted criteria in this designing

The paper presents designing activities concerning the rating of the values of scalar quantities optimized in accordance with the accepted criteria in designing a condenser of marine steam turbine, which result from the forecasted characteristic, most frequently occurring set points of steam turbine power appearing during the operation of a sea ship. It refers to the method of designing heat exchangers contained in the paper [1] and to the issues raised in the publication [2]. The paper also presents exemplary computational results of the above-mentioned optimized scalar quantities, which refer to designing a shell and tube condenser of marine steam turbine. It was assumed in the paper that the values of mass the mass flow rate of the steam: one p m , 0.75 p m , 0.5 p m , which result from the assumed characteristic set points of marine steam turbine, which occur during the operation of a sea ship. Then, the selected designing activities referring to the above-mentioned optimization were exemplified. On the basis of the computational results, it was shown that the appropriate division of heat exchange area into the definite numbers of condensers, which results from the operation of steam turbine of a definite sea ship, increases operation effectiveness of these condensers in relation to one marine steam turbine condenser. This is a result of optimal values retention: velocity of cooling water of the definite condenser or condensers and temperature of this water on the output of this condenser or condensers during characteristic set points in the operation conditions defined in designing. Next, economic advantages were pointed out, which resulted from the described in the paper, technical solution. These advantages constitute the designing criterion that must be taken into consideration while making a decision about the division of heat exchange area into the definite number of condensers of marine steam turbine. Finally, the conclusions resulting from the paper’s contents are presented.