A study on the design of Waste Heat Recovery Unit (WHRU) for 30kW Organic Rankine Cycle (ORC) power system for ships
As the improvement of ship energy efficiency is emphasized internationally, researches for this are being conducted in various ways. Accordingly, research is being conducted on the application of ORC power generation systems for ships using waste heat from the main engine exhaust gas generated durin...
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| Veröffentlicht in: | Journal of international maritime safety, environmental affairs, and shipping environmental affairs, and shipping, 2023-01, Vol.7 (1) |
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| creator | Hwang, Dae Jung Jee, Jae Hoon Kim, Jung Sik Kim, San Oh, Cheol |
| description | As the improvement of ship energy efficiency is emphasized internationally, researches for this are being conducted in various ways. Accordingly, research is being conducted on the application of ORC power generation systems for ships using waste heat from the main engine exhaust gas generated during operation. The WHRU constituting the ORC system must be designed so that stable-phase change heat transfer occurs. In this study, a design study was conducted using the ANSYS CFX program for the production of a WHRU capable of generating ORC power generation output for a 30-kW ship using R134a refrigerant. A WHRU capable of achieving 30 kW generation output performance was designed while changing various design elements (shape, tube diameter, number of tubes, number of stages, etc.) of the WHRU. As a result, it was confirmed that the refrigerant (R134a) in a liquid state at a temperature of 14.8°C entered at a flow rate of 1.06 kg/s, evaporated by the exhaust gas, and was discharged from the outlet in a state of vapor fraction 1 at a temperature of 56.4°C. The heat transfer rate of the WHRU was 219.2 kW, the pressure during the evaporation process was constant at 13.9 bar in absolute pressure, and the enthalpy was 220 kJ/kg at the inlet and 426 kJ/kg at the outlet, respectively. |
| doi_str_mv | 10.1080/25725084.2023.2184603 |
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Accordingly, research is being conducted on the application of ORC power generation systems for ships using waste heat from the main engine exhaust gas generated during operation. The WHRU constituting the ORC system must be designed so that stable-phase change heat transfer occurs. In this study, a design study was conducted using the ANSYS CFX program for the production of a WHRU capable of generating ORC power generation output for a 30-kW ship using R134a refrigerant. A WHRU capable of achieving 30 kW generation output performance was designed while changing various design elements (shape, tube diameter, number of tubes, number of stages, etc.) of the WHRU. As a result, it was confirmed that the refrigerant (R134a) in a liquid state at a temperature of 14.8°C entered at a flow rate of 1.06 kg/s, evaporated by the exhaust gas, and was discharged from the outlet in a state of vapor fraction 1 at a temperature of 56.4°C. The heat transfer rate of the WHRU was 219.2 kW, the pressure during the evaporation process was constant at 13.9 bar in absolute pressure, and the enthalpy was 220 kJ/kg at the inlet and 426 kJ/kg at the outlet, respectively.</description><identifier>ISSN: 2572-5084</identifier><identifier>EISSN: 2572-5084</identifier><identifier>DOI: 10.1080/25725084.2023.2184603</identifier><language>eng</language><publisher>Abingdon: Taylor & Francis</publisher><subject>computational fluid dynamic (CFD) ; Design ; Electric power generation ; Energy efficiency ; Enthalpy ; Evaporation ; Exhaust emissions ; Exhaust gases ; Exhaust systems ; Flow rates ; Flow velocity ; Heat ; Heat recovery ; Heat transfer ; organic Rankine cycle (ORC) ; phase change ; Pressure ; Rankine cycle ; Refrigerants ; ship energy efficiency ; Ships ; Tubes ; Waste heat ; Waste heat recovery ; waste heat recovery unit (WHRU)</subject><ispartof>Journal of international maritime safety, environmental affairs, and shipping, 2023-01, Vol.7 (1)</ispartof><rights>2023 The Author(s). 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Accordingly, research is being conducted on the application of ORC power generation systems for ships using waste heat from the main engine exhaust gas generated during operation. The WHRU constituting the ORC system must be designed so that stable-phase change heat transfer occurs. In this study, a design study was conducted using the ANSYS CFX program for the production of a WHRU capable of generating ORC power generation output for a 30-kW ship using R134a refrigerant. A WHRU capable of achieving 30 kW generation output performance was designed while changing various design elements (shape, tube diameter, number of tubes, number of stages, etc.) of the WHRU. As a result, it was confirmed that the refrigerant (R134a) in a liquid state at a temperature of 14.8°C entered at a flow rate of 1.06 kg/s, evaporated by the exhaust gas, and was discharged from the outlet in a state of vapor fraction 1 at a temperature of 56.4°C. 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Jee, Jae Hoon ; Kim, Jung Sik ; Kim, San ; Oh, Cheol</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3143-bc39ab8536e4b2b042bf9a2e76c92a41f8064e60d0ab73c91e95cd2beaab9ef83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>computational fluid dynamic (CFD)</topic><topic>Design</topic><topic>Electric power generation</topic><topic>Energy efficiency</topic><topic>Enthalpy</topic><topic>Evaporation</topic><topic>Exhaust emissions</topic><topic>Exhaust gases</topic><topic>Exhaust systems</topic><topic>Flow rates</topic><topic>Flow velocity</topic><topic>Heat</topic><topic>Heat recovery</topic><topic>Heat transfer</topic><topic>organic Rankine cycle (ORC)</topic><topic>phase change</topic><topic>Pressure</topic><topic>Rankine cycle</topic><topic>Refrigerants</topic><topic>ship energy efficiency</topic><topic>Ships</topic><topic>Tubes</topic><topic>Waste heat</topic><topic>Waste heat recovery</topic><topic>waste heat recovery unit (WHRU)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hwang, Dae Jung</creatorcontrib><creatorcontrib>Jee, Jae Hoon</creatorcontrib><creatorcontrib>Kim, Jung Sik</creatorcontrib><creatorcontrib>Kim, San</creatorcontrib><creatorcontrib>Oh, Cheol</creatorcontrib><collection>Taylor & Francis Open Access</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Environment Abstracts</collection><collection>Mechanical Engineering Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>Research Library</collection><collection>Research Library (Corporate)</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>ProQuest Central Basic</collection><collection>Environment Abstracts</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>Journal of international maritime safety, environmental affairs, and shipping</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hwang, Dae Jung</au><au>Jee, Jae Hoon</au><au>Kim, Jung Sik</au><au>Kim, San</au><au>Oh, Cheol</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A study on the design of Waste Heat Recovery Unit (WHRU) for 30kW Organic Rankine Cycle (ORC) power system for ships</atitle><jtitle>Journal of international maritime safety, environmental affairs, and shipping</jtitle><date>2023-01-02</date><risdate>2023</risdate><volume>7</volume><issue>1</issue><issn>2572-5084</issn><eissn>2572-5084</eissn><abstract>As the improvement of ship energy efficiency is emphasized internationally, researches for this are being conducted in various ways. Accordingly, research is being conducted on the application of ORC power generation systems for ships using waste heat from the main engine exhaust gas generated during operation. The WHRU constituting the ORC system must be designed so that stable-phase change heat transfer occurs. In this study, a design study was conducted using the ANSYS CFX program for the production of a WHRU capable of generating ORC power generation output for a 30-kW ship using R134a refrigerant. A WHRU capable of achieving 30 kW generation output performance was designed while changing various design elements (shape, tube diameter, number of tubes, number of stages, etc.) of the WHRU. As a result, it was confirmed that the refrigerant (R134a) in a liquid state at a temperature of 14.8°C entered at a flow rate of 1.06 kg/s, evaporated by the exhaust gas, and was discharged from the outlet in a state of vapor fraction 1 at a temperature of 56.4°C. 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| subjects | computational fluid dynamic (CFD) Design Electric power generation Energy efficiency Enthalpy Evaporation Exhaust emissions Exhaust gases Exhaust systems Flow rates Flow velocity Heat Heat recovery Heat transfer organic Rankine cycle (ORC) phase change Pressure Rankine cycle Refrigerants ship energy efficiency Ships Tubes Waste heat Waste heat recovery waste heat recovery unit (WHRU) |
| title | A study on the design of Waste Heat Recovery Unit (WHRU) for 30kW Organic Rankine Cycle (ORC) power system for ships |
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