الفهرس 
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Abstract
The merchant ship propulsion machinery has seen great development during the last 30 years (1963-1993). In 1963 br>there was a wide choice propulsion machinery types and <designs~ some these have disappeared~ and a~ter years o~
intense competition and extensive development a dominant pattern o~ choice has emerged in recent years.
In chapter (1)~ these develooments have been studied.together with the heat balance o~ the modern diesel engine. Nearly 50% the heat energy in the ~uel burnt in a br>modern diesel engine is converted to use~ul work while the remaining 50% is considered as losses. The exhaust gas heat loss amounts to approimately 26% o~ the ~uel energy and it has the highest temperature it is there~ore the most attractive as ~ar as waste heat recovery is concerned. For better utilization o~ the diesel engine plant energy as a whole the use o~ the heat recovered rom exhaust gases i’;
studied. The use o~ exhaust gas boiler linked to the diesel engine has a special advantage since a high percentage the energy in the exhaust gases can be utilized ~or steam generation. Plants o~ this kind can provide steam ~or heat- ing and also through a turbo-generator ~or ships electrical reouirements. The principle is particularly economical ~Qr ships with large main engines where the exhaust gas recovered entirely covers the sea load ~or heating and br>electrical power. Chapter (2) gives a thermodynamical study o~ the exhaust
gas data and di~~erent methods o~ expecting ~he renl gas and
the mixture o~ gases behaviour. Also methods o~ estimation
o~ the data required ~or the exhaust gas heat recovery plant are studied; these include estimation o~ the exhaust gas <mass exhaust gas temperature and exhaust gas speci~ic heat at constant pressure. Computer programs have been written to calculate the speci~ic heat o~ exhaust gases at constant pressure ~or any given temperature, and to calculate the speci~ic gas mass <when given the engine particulars. Chapter (3) gives a survey o-f exh””lust gas heat recovery plants -for heating and electrical power generation in
addition to the power back ~ systems which use power ~rom
exhaust gas steam plant to drive the propeller sha~t, and
the turbo compound systems which use the exhaust gas energy to drive a power turbine where the recovered energy is thu: ed directly to the engine crank sha-ft.