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

Lampe, Jörg; Rüde, Erich; Papadopoulos, Yiannis; Kabir, Sohag

Abstract

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.

Citation

Lampe, J., Rüde, E., Papadopoulos, Y., & Kabir, S. (2018). Model-based assessment of energy-efficiency, dependability, and cost-effectiveness of waste heat recovery systems onboard ship. Ocean engineering, 157, 234-250. https://doi.org/10.1016/j.oceaneng.2018.03.062

• Journal Article Type: Article
• Acceptance Date: Mar 21, 2018
• Online Publication Date: Apr 5, 2018
• Publication Date: 2018-06
• Deposit Date: Apr 16, 2018
• Publicly Available Date: Apr 6, 2019
• Journal: Ocean Engineering
• Print ISSN: 0029-8018
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 157
• Pages: 234-250
• DOI: https://doi.org/10.1016/j.oceaneng.2018.03.062
• Keywords: Environmental Engineering; Ocean Engineering
• Public URL: https://hull-repository.worktribe.com/output/779205
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0029801818303408
• Additional Information: This article is maintained by: Elsevier; Article Title: Model-based assessment of energy-efficiency, dependability, and cost-effectiveness of waste heat recovery systems onboard ship; Journal Title: Ocean Engineering; CrossRef DOI link to publisher maintained version: http://dx.doi.org/10.1016/j.oceaneng.2018.03.062; Content Type: article; Copyright: © 2018 Elsevier Ltd. All rights reserved.
• Contract Date: Apr 17, 2018