The paper presents an original variable layout steam plant for the Waste Heat Recovery (WHR-VL) from marine dual fuel (DF) engines, designed considering the different exhaust gas stack temperature limits, depending on the engine fuel type: generally no less than 160 °C for diesel oil and without limits for natural gas (NG). Using diesel oil, a single pressure superheated steam plant configuration is adopted, while a dual pressure system is proposed for the NG fuel mode of the engine. In both WHR-VL plant layouts, the produced steam is mainly delivered to a steam turbine for the ship electric energy production, while a smaller amount meets the ship thermal loads. Starting from data of a marine four stroke DF engine, the WHR-VL steam plant components are sized and optimized through a mathematical code, according to a numerical procedure described in the paper. The WHR-VL plant data and performance, for different engine fuel modes and loads, are compared with those of a more traditional WHR single pressure steam plant, developed and optimized for the waste heat recovery of the same dual fuel engine.
High Efficiency Waste Heat Recovery from Dual Fuel Marine Engines
Ugo Campora;Michele Laviola;Raphael Zaccone
2018-01-01
Abstract
The paper presents an original variable layout steam plant for the Waste Heat Recovery (WHR-VL) from marine dual fuel (DF) engines, designed considering the different exhaust gas stack temperature limits, depending on the engine fuel type: generally no less than 160 °C for diesel oil and without limits for natural gas (NG). Using diesel oil, a single pressure superheated steam plant configuration is adopted, while a dual pressure system is proposed for the NG fuel mode of the engine. In both WHR-VL plant layouts, the produced steam is mainly delivered to a steam turbine for the ship electric energy production, while a smaller amount meets the ship thermal loads. Starting from data of a marine four stroke DF engine, the WHR-VL steam plant components are sized and optimized through a mathematical code, according to a numerical procedure described in the paper. The WHR-VL plant data and performance, for different engine fuel modes and loads, are compared with those of a more traditional WHR single pressure steam plant, developed and optimized for the waste heat recovery of the same dual fuel engine.File | Dimensione | Formato | |
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