Simulation Techniques for Design and Control of a Waste Heat Recovery System in Marine Natural Gas Propulsion Applications

Altosole, Marco; Campora, Ugo; Donnarumma, Silvia; Zaccone, Raphael

doi:10.3390/jmse7110397

Cited by 16 publications

(4 citation statements)

References 11 publications

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“…The energy recovery, converted into electric power, is possible by the hybrid turbochargers (HTC) [9] of the main engines and by the waste heat recovery plant (WHR) equipped with a steam turbine (ST in Fig. 1) [15], [16].…”

Section: A Power and Propulsion Plant Main Componentsmentioning

confidence: 99%

Energy efficiency analysis of a flexible marine hybrid propulsion system

Altosole

Campora

Vigna

2020

2020 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)

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The paper analyses some advantages of the hybrid ship propulsion, enhanced by the use of some energy recovery technologies. The concept design of a power plant for a Ro-Ro ferry is presented as a case study, since this particular ship can best take advantage of the operational flexibility of this propulsion type. As an element of innovation, the hybrid propulsion flexibility is analysed taking into account the installation onboard of dual fuel engines. This leads to examine the influence of natural gas, being rather different from traditional diesel oil in performance and price, on the propulsion system efficiency and fuel cost saving. Moreover, technical solutions as the waste heat recovery from the exhaust gas of the engine, equipped with innovative hybrid turbochargers, are also considered to produce additional electric energy, improving the overall efficiency of the vessel.

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Section: A Power and Propulsion Plant Main Componentsmentioning

confidence: 99%

Energy efficiency analysis of a flexible marine hybrid propulsion system

Altosole

Campora

Vigna

2020

2020 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)

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“…It is predicted that by 2030, under different CO 2 reduction paths, liquefied natural gas (LNG) will provide 40-80% of the fuel mix assistance [4]. It can be seen that LNG power is undoubtedly the most effective alternative technology for petroleum ships in the field of ocean shipping or short-distance rivers [5,6]. LNG fueled ships mainly includes two types: LNG single-fuel and dual-fuel engines.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Large-Temperature-Range and Long-Period Monitoring for LNG Marine Auxiliary Based on Fiber Bragg Grating Temperature Measurement

Han

Wang

Zhang

et al. 2021

JMSE

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Temperature is a key variable to evaluate the energy consumption and thermodynamic performance of traditional marine auxiliary machinery, chillers and piping systems. In particular, for the cryogenic storage tanks and fuel gas supply systems of LNG ships, explosion-proof and low-temperature-resistance properties bring new challenges to the onboard temperature measurement and monitoring. In order to promote the development of high-performance and safer monitoring systems for LNG ships, this paper adopted fiber Bragg grating (FBG) technology to ensure the measurement safety and accuracy of temperature sensors, and performs a series of experiments in a large temperature range on the chiller, pipeline, and cryogenic storage tank of an LNG ship and their long-term reliabilities. Firstly, the principle and composition of the designed FBG temperature sensors are introduced in detail, and the measurement accuracy and range of different metal-coated optical fibers were tested in a large temperature range and compared against the traditional thermistors. Then, the effects of different operating conditions of the LNG marine chiller system and cryogenic storage tank on the temperature measurements were investigated. In addition, the drift degrees of the optical fibers and industrial thermistors were analyzed to figure out their reliabilities for long-term temperature measurements. The results showed that for the long-period (16 months) monitoring of LNG ships in a large temperature range (105–315 K) under different shipping conditions, the optical temperature measurement based on FBG technology has sufficient accuracy and dynamic sensitivity with a higher safety than the traditional thermoelectric measurement. Besides, the ship vibration, ambient humidity, and great temperature changes have little impact on its measurement reliability and drifts. This research can provide references and technical supports to the performance testing systems of LNG ships and other relevant vessels with stricter safety standards.

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“…WHR steam plants allow achieving an overall efficiency improvement of 3 ÷ 5%, which corresponds to about the same percentage of carbon dioxide emission reduction. A further improvement in the ship's energy efficiency can be achieved by installing WHR systems for dual-fuel (DF) marine engines [11][12][13]. It should be noted that natural gas (NG), in comparison with the traditional heavy fuel oil (HFO), reduces significantly emissions from the engine, as well as being 1 ÷ 2% more efficient at medium-high engine loads [14].…”

Section: Introductionmentioning

confidence: 99%

Marine Dual-Fuel Engines Power Smart Management by Hybrid Turbocharging Systems

Altosole

Balsamo

Campora

et al. 2021

JMSE

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The performance of a marine dual-fuel engine, equipped with an innovative hybrid turbocharger producing electric power to satisfy part of the ship’s electric load, is presented by a simulation comparison with the traditional turbocharging technology. The two distinct fuel types, combined with the hybrid turbocharger, involve a substantial change in the engine control modes, resulting in more flexible and efficient power management. Therefore, the investigation requires a numerical analysis depending on the engine load variation, in both fuelling modes, to highlight different behaviours. In detail, a dual-fuel engine simulation model is validated for a particular application in order to perform a complete comparison, reported in tabular and graphical form, between the two examined turbocharging solutions. The simulation analysis is presented in terms of the engine working data and overall energy conversion efficiency.

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Simulation Techniques for Design and Control of a Waste Heat Recovery System in Marine Natural Gas Propulsion Applications

Cited by 16 publications

References 11 publications

Energy efficiency analysis of a flexible marine hybrid propulsion system

Energy efficiency analysis of a flexible marine hybrid propulsion system

Experimental Study of Large-Temperature-Range and Long-Period Monitoring for LNG Marine Auxiliary Based on Fiber Bragg Grating Temperature Measurement

Marine Dual-Fuel Engines Power Smart Management by Hybrid Turbocharging Systems

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