Model-based assessment of energy-efficiency, dependability, and cost-effectiveness of waste heat recovery systems onboard ship

OCEAN ENGINEERING

卷:157

Article

Lampe, Joerg¹  Rude, Erich¹  Papadopoulos, Yiannis²  Kabir, Sohag² 

[1] DNV GL SE, Brooktorkai 18, D-20457 Hamburg, Germany

[2] Univ Hull, Cottingham Rd, Kingston Upon Hull HU6 7RX, N Humberside, England

关键词: Energy efficiency;    Green shipping;    Energy flow simulation;    Reliability;    Availability;    Economic assessment;   

DOI  :  10.1016/j.oceaneng.2018.03.062

来源: Elsevier

【 摘 要 】

Technological systems are not merely designed with a narrow function in mind. Good designs typically aim at reducing operational costs, e.g. through achieving high energy efficiency and improved dependability (i.e. reliability, availability and maintainability). When there is a choice of alternative design options that perform the same function, it makes sense to compare alternatives so that the variant that minimises operational costs can be selected. In this paper, we examine this issue in the context of the design of Waste Heat Recovery Systems (WHRS) for main engines of large commercial freight vessels. We propose a method that can predict the operational cost of a WHRS via thermodynamic analysis which shows costs related to energy utilisation, and dependability analysis which shows costs related to system unavailability and repair. Our approach builds on recent advances in thermodynamic simulation and compositional dependability analysis techniques. It is a model-based approach, and allows reuse of component libraries, and a high degree of automation which simplify application of the method. Our case study shows that alternative designs can be explored in fast iterations of this method, and that this facilitates the evidence -based selection of a design that minimises operational costs.

【 授权许可】

Free