【作者】

Nikolaos Kakalis,George Dimopoulos

【摘要】

论文已在上海2013年CIMAC大会上发表，论文版权归CIMAC所有。 Abstract: Waste heat recovery (WHR) is a promising solution for the efficient, cost-effective and environmentally friendly power generation onboard oceangoing vessels. Nowadays, there is a renewed interest in these systems due to persistently rising fuel costs, market volatility, environmental concerns and stringent emissions regulations. In this landscape, the marine powerplant complexity increases significantly under machinery space and weight limitations, multiple safety and operational constraints, new technologies and fuels, and inherently higher capital costs. To address simultaneously such issues, a techno-economic approach able to take into account the design, operation and control of the entire integrated marine energy system throughout its mission profile is required. In this paper, we present the techno-economic assessment and optimisation of waste heat recovery options for an aframax tanker, a cape-sized bulk carrier and a 8000 TEU containership, via mathematical modelling and simulation techniques. Representative models of the integrated energy system of each vessel have been developed using a modular library of reconfigurable component process models suitable for design, performance and transient operation analyses. To account for the interrelations of design, operability and transient operation between the prime mover and heat recovery subsystems, detailed models of Diesel engine, turbocharger, power and steam turbine, various heat exchangers and auxiliaries were used. The component models have been calibrated and validated using measured data. Capital cost functions for the waste heat recovery components have been employed along with operational cost data to evaluate and optimise the net present value (NPV) of the energy system subject to technical, operational, safety, space and weight constraints. This assessment and optimization has been performed taking into account typical mission profiles for each of the vessels considered. The techno-economic assessment and optimisation results indicate that there is clear potential for the waste heat recovery systems for the selected ships. However, the best-suited configuration and savings potential are strongly related to the specific ship type and size. The efficiency gains and operability of the WHR system also vary with the powerplant load demands. This study identified the minimum attainable load for WHR system operation for each ship. In addition, sensitivity analyses on fuel prices and capital costs have been performed and the range of economic viability of the WHR has been identified. Through this model based approach complex integrated systems can be successfully and timely investigated providing effective decision support to system designers, integrators and owners/operators.

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

1

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