[home] [Personal Program] [Help]

---

Session: Poster session & Sponsor Exhibition
Session starts: Monday 07 October, 14:00

---

Dongkil Lee (Samsung Heavy Industry)
Ho Ki Lee (Samsung Heavy Industry)

Abstract:
Because of IMO MEPC(International Maritime Organization Marine Environmental Protection Committee) 62nd Session, emission control and efficiency improvements of ships are became more important issue for current marine business. One of ways to achieve the efficiency improvement in the ships is recovering unused source of energy in the ships. Typically, current marine engines use only 50% of fuel energy for the shaft power and dump 30% to 40% as waste heat. For the low grade waste heat, the Organic Rankine Cycle(ORC) is one of the promising heat recovery power generatin cycles. ORC is a rankine cycle that uses organic fluid (High molecular mass fluid) with a liquid-vapor change occurring at a lower temperature than the water-steam phase change. The present work focuses on the heat transfer loop of Organic Rankine Cycle - Waste Heat Recovery System(ORC-WHRS) for the vessel. The considered ship type and engine type were Suez-Max Tanker and MAN Diesel & Turbo 6S70ME-C8.1-TII. The heat transfer loops were evaluated based on the power output of thermal cycle. Performances of ORC were calculated at the different temperature conditions of thermal loop. Calculated results were compared in terms of cycle and system efficiency. The result shows additional electricity of Maximum 660kWe con be produced by using ORC-WHRS, and the system has 9~13% of cycle eiifciency depends on the heat transfer loop design and pinch condition of heat exchanger. In this work show, ORC-WHRS con produce 60~73% of required electricity of Suez-max COT at the normal operation running condition and this lead to fuel saving effect. And Addition of evaporator and pre-heater were studied to maximize output power of ORC-WHRS. Exhaust gas, scavenge air and jacket cooling water were considered as possible heat sources to be recovered. Dual loop system which has multiple heat transfer loops for each waste heat source shows better performance than the single loop system which has only one heat transfer loop. By changing ORC evaporator and preheater, the output of ORC increased by 6~27%