The potential of exhaust waste heat recovery (WHR) from marine diesel engines via organic rankine cycle

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The rise of fuel prices due to the depletion of fossil fuel energy and unlimited carbon dioxide let-off are creating a renewed interest in techniques to increase the thermal efficiency of marine diesel engines. One promising mechanism to achieve improvement in system thermal efficiency is the conversion of engine waste heat to a more useful form of energy, either mechanical energy or electrical energy. Thus, this study investigates the potential of exhaust waste heat recovery from marine diesel engines using bioethanol production from selected microalgae as the working fluid via organic Rankine cycle (ORC). It also examines the system thermal efficiency and determines the pinch temperature of the plant. The microalgae Dunaliella tertiolecta, Chlamydomonas fasciata Ettl 437 and Synechococcus PCC 7002 are chosen as bioethanol producers based on the high yield of production. The maximum net power output and high system thermal efficiency are chosen as the evaluation criteria to select the microalgae with the best performance. The results demonstrate that among the three selected microalgae, Synechococcus PCC 7002 shows the highest efficiency of approximately 2.28% for the mass flowrate of exhaust gas of 4189 kgh−1, while the net power output was approximately 5.10 kW.

Original languageEnglish
Pages (from-to)17-31
Number of pages15
JournalEnergy
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

Marine engines
Rankine cycle
Waste heat utilization
Diesel engines
Bioethanol
Waste heat
Exhaust gases
Fossil fuels
Carbon dioxide
Engines
Fluids
Hot Temperature

Keywords

  • Bioethanol
  • Microalgae
  • Organic Rankine cycle
  • Working fluid

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

@article{faa621ee5a57421e858af220ef5098cd,
title = "The potential of exhaust waste heat recovery (WHR) from marine diesel engines via organic rankine cycle",
abstract = "The rise of fuel prices due to the depletion of fossil fuel energy and unlimited carbon dioxide let-off are creating a renewed interest in techniques to increase the thermal efficiency of marine diesel engines. One promising mechanism to achieve improvement in system thermal efficiency is the conversion of engine waste heat to a more useful form of energy, either mechanical energy or electrical energy. Thus, this study investigates the potential of exhaust waste heat recovery from marine diesel engines using bioethanol production from selected microalgae as the working fluid via organic Rankine cycle (ORC). It also examines the system thermal efficiency and determines the pinch temperature of the plant. The microalgae Dunaliella tertiolecta, Chlamydomonas fasciata Ettl 437 and Synechococcus PCC 7002 are chosen as bioethanol producers based on the high yield of production. The maximum net power output and high system thermal efficiency are chosen as the evaluation criteria to select the microalgae with the best performance. The results demonstrate that among the three selected microalgae, Synechococcus PCC 7002 shows the highest efficiency of approximately 2.28{\%} for the mass flowrate of exhaust gas of 4189 kgh−1, while the net power output was approximately 5.10 kW.",
keywords = "Bioethanol, Microalgae, Organic Rankine cycle, Working fluid",
author = "{Mat Nawi}, Z. and Kamarudin, {Siti Kartom} and {Sheikh Abdullah}, {Siti Rozaimah} and Lam, {S. S.}",
year = "2019",
month = "1",
day = "1",
doi = "10.1016/j.energy.2018.10.064",
language = "English",
pages = "17--31",
journal = "Energy",
issn = "0360-5442",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - The potential of exhaust waste heat recovery (WHR) from marine diesel engines via organic rankine cycle

AU - Mat Nawi, Z.

AU - Kamarudin, Siti Kartom

AU - Sheikh Abdullah, Siti Rozaimah

AU - Lam, S. S.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The rise of fuel prices due to the depletion of fossil fuel energy and unlimited carbon dioxide let-off are creating a renewed interest in techniques to increase the thermal efficiency of marine diesel engines. One promising mechanism to achieve improvement in system thermal efficiency is the conversion of engine waste heat to a more useful form of energy, either mechanical energy or electrical energy. Thus, this study investigates the potential of exhaust waste heat recovery from marine diesel engines using bioethanol production from selected microalgae as the working fluid via organic Rankine cycle (ORC). It also examines the system thermal efficiency and determines the pinch temperature of the plant. The microalgae Dunaliella tertiolecta, Chlamydomonas fasciata Ettl 437 and Synechococcus PCC 7002 are chosen as bioethanol producers based on the high yield of production. The maximum net power output and high system thermal efficiency are chosen as the evaluation criteria to select the microalgae with the best performance. The results demonstrate that among the three selected microalgae, Synechococcus PCC 7002 shows the highest efficiency of approximately 2.28% for the mass flowrate of exhaust gas of 4189 kgh−1, while the net power output was approximately 5.10 kW.

AB - The rise of fuel prices due to the depletion of fossil fuel energy and unlimited carbon dioxide let-off are creating a renewed interest in techniques to increase the thermal efficiency of marine diesel engines. One promising mechanism to achieve improvement in system thermal efficiency is the conversion of engine waste heat to a more useful form of energy, either mechanical energy or electrical energy. Thus, this study investigates the potential of exhaust waste heat recovery from marine diesel engines using bioethanol production from selected microalgae as the working fluid via organic Rankine cycle (ORC). It also examines the system thermal efficiency and determines the pinch temperature of the plant. The microalgae Dunaliella tertiolecta, Chlamydomonas fasciata Ettl 437 and Synechococcus PCC 7002 are chosen as bioethanol producers based on the high yield of production. The maximum net power output and high system thermal efficiency are chosen as the evaluation criteria to select the microalgae with the best performance. The results demonstrate that among the three selected microalgae, Synechococcus PCC 7002 shows the highest efficiency of approximately 2.28% for the mass flowrate of exhaust gas of 4189 kgh−1, while the net power output was approximately 5.10 kW.

KW - Bioethanol

KW - Microalgae

KW - Organic Rankine cycle

KW - Working fluid

UR - http://www.scopus.com/inward/record.url?scp=85056156617&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056156617&partnerID=8YFLogxK

U2 - 10.1016/j.energy.2018.10.064

DO - 10.1016/j.energy.2018.10.064

M3 - Article

AN - SCOPUS:85056156617

SP - 17

EP - 31

JO - Energy

JF - Energy

SN - 0360-5442

ER -