A Comparison of Organic and Steam Rankine Cycle Power Systems for Waste Heat Recovery on Large Ships

Jesper Graa Andreasen, Andrea Meroni and Fredrik Haglind
Additional contact information
Jesper Graa Andreasen: Department of Mechanical Engineering, Technical University of Denmark, Building 403, Nils Koppels Allé, DK-2800 Kgs. Lyngby, Denmark
Andrea Meroni: Department of Mechanical Engineering, Technical University of Denmark, Building 403, Nils Koppels Allé, DK-2800 Kgs. Lyngby, Denmark
Fredrik Haglind: Department of Mechanical Engineering, Technical University of Denmark, Building 403, Nils Koppels Allé, DK-2800 Kgs. Lyngby, Denmark

Energies, 2017, vol. 10, issue 4, 1-23

Abstract: This paper presents a comparison of the conventional dual pressure steam Rankine cycle process and the organic Rankine cycle process for marine engine waste heat recovery. The comparison was based on a container vessel, and results are presented for a high-sulfur (3 wt %) and low-sulfur (0.5 wt %) fuel case. The processes were compared based on their off-design performance for diesel engine loads in the range between 25% and 100%. The fluids considered in the organic Rankine cycle process were MM(hexamethyldisiloxane), toluene, n-pentane, i-pentane and c-pentane. The results of the comparison indicate that the net power output of the steam Rankine cycle process is higher at high engine loads, while the performance of the organic Rankine cycle units is higher at lower loads. Preliminary turbine design considerations suggest that higher turbine efficiencies can be obtained for the ORC unit turbines compared to the steam turbines. When the efficiency of the c-pentane turbine was allowed to be 10% points larger than the steam turbine efficiency, the organic Rankine cycle unit reaches higher net power outputs than the steam Rankine cycle unit at all engine loads for the low-sulfur fuel case. The net power production from the waste heat recovery units is generally higher for the low-sulfur fuel case. The steam Rankine cycle unit produces 18% more power at design compared to the high-sulfur fuel case, while the organic Rankine cycle unit using MM produces 33% more power.

Keywords: waste heat recovery; organic Rankine cycle; steam Rankine cycle; off-design; turbine efficiency; diesel engine; marine vessel; container ship; maritime; sustainability; low sulfur fuel (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (23)

Downloads: (external link)
https://www.mdpi.com/1996-1073/10/4/547/pdf (application/pdf)
https://www.mdpi.com/1996-1073/10/4/547/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:10:y:2017:i:4:p:547-:d:96042

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().