Energy, Economic and Environmental Effects of the Marine Diesel Engine Trigeneration Energy Systems

Abstract

The paper discusses the possibility of applying the trigeneration energy concept (cogeneration + absorption cooling) on diesel-powered refrigerated ships, based on systematic analyses of variable energy loads during the estimated life of the ship on a predefined navigation route. From a methodological point of view, mathematical modeling of predictable energy interactions of a ship with a realistic environment yields corresponding models of simultaneously occurring energy loads (propulsion, electrical and thermal), as well as the preferred trigenerational thermal effect (cooling and heating). Special emphasis is placed on the assessment of the upcoming total heat loads (refrigeration and heating) in live cargo air conditioning systems (unfrozen fruits and vegetables) as in ship accommodations. The obtained results indicate beneficiary energy, economic and environmental effects of the application of diesel engine trigeneration systems on ships intended for cargo transport whose storage temperatures range from −25 to 15 °C. Further analysis of trigeneration system application to the passenger ship air conditioning system indicates even greater achievable savings.

Analysis and Comparison of Ship Propulsion Systems

“…About 90% of today's ships, using diesel-engines as the main propulsion engines. The striking advantage of these propulsion systems is reflected in their efficiency (from 0.49 ~ 0.53), [1], and economical consumption of fuel. Propulsion, diesel can develop power up to 82440 kW per shaft according to the MAN engine selection catalogue Figure 1, [2].…”

Marine Power Systems

“…Gospić et al [1] discusses the possibility of applying the trigeneration energy concept (cogeneration + absorption cooling) on diesel-powered refrigerated ships, based on systematic analyses of variable energy loads during the estimated life of the ship on a predefined navigation route. From a methodological point of view, mathematical modeling of predictable energy interactions of a ship with a realistic environment yields corresponding models of simultaneously occurring energy loads (propulsion, electrical, and thermal), as well as the preferred trigenerational thermal effect (cooling and heating).…”

“…As the trade amount is vast, the power included in that transportation field is the same high. Although maritime transport is pointed to as an energy-efficient mode of transportation, its emission of GHGs is still high despite new technologies that have been adopted [1]. Optimization and the use of new fuels with new technologies for power generation of such systems are always tasks that are necessary in order to improve efficiency of the power generation system and to reduce GHG emissions [2][3][4][5][6].…”

Thermodynamic Analysis of Steam Cooling Process in Marine Power Plant by Using Desuperheater

“…Observation of steam cooling process and Desuperheater operation will be performed by using energy and exergy analyses. Energy analysis is based on the first law of thermodynamics and it did not consider the state of the ambient in which observed system, component or process operates [33,34]. Exergy analysis is based on the second law of thermodynamics and it consider the ambient state [35,36].…”