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Special Issue "Applications for the Organic Rankine Cycle"

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "Thermal Management".

Deadline for manuscript submissions: closed (31 May 2019)

Special Issue Editor

Guest Editor
Dr. Jovana Radulovic

Department: School of Mechanical and Design Engineering, University of Portsmouth, University House Winston Churchill Avenue Portsmouth PO1 2UP, Portsmouth, UK
Website | E-Mail
Interests: wetting and spreading of surfactant solutions; dynamics of evaporation of nanoparticle dispersions; water-repelling emulsions for masonry protection and prevention of biofouling; organic/hybrid Rankine cycle and renewable energies

Special Issue Information

Dear Colleagues,

With the global energy demand on the rise, the utilisation of unconventional energy sources and the application of diverse energy systems continue to be the focal points of scientific and industrial research worldwide. The organic Rankine cycle is a promising technology, proven to be an effective tool for distributed electricity generation and harnessing waste heat energy. Standalone systems are commonly powered by biomass and successfully paired with concentrated solar power (CSP) and steam Rankine systems. On-board applications are being developed, with recent advances concentrating on waste heat recovery from exhaust gas heat, including internal combustion engines, heavy and light duty vehicles, and marine applications. Significant attention is being paid to the design and operation of ORC systems and their components, primarily expanders, working fluid selection, as well as optimization and control strategies.

Dr. Jovana Radulovic
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • organic Rankine cycle
  • waste heat recovery
  • working fluids
  • expanders
  • thermoeconomic analysis

Published Papers (3 papers)

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Research

Open AccessArticle
Optimization of an Organic Rankine Cycle System for an LNG-Powered Ship
Energies 2019, 12(10), 1933; https://doi.org/10.3390/en12101933
Received: 30 April 2019 / Revised: 11 May 2019 / Accepted: 14 May 2019 / Published: 20 May 2019
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Abstract
Recovering energy from waste energy sources is an important issue as environmental pollution and the energy crisis become serious. In the same context, recovering liquefied natural gas (LNG) cold energy from an LNG-powered ship is also important in terms of energy savings. To [...] Read more.
Recovering energy from waste energy sources is an important issue as environmental pollution and the energy crisis become serious. In the same context, recovering liquefied natural gas (LNG) cold energy from an LNG-powered ship is also important in terms of energy savings. To this end, this study investigated a novel solution for a LNG-powered ship to recover LNG cold energy. Six different organic Rankine cycle (ORC) systems (three for high-pressure dual-fuel engines and three for medium-pressure dual-fuel engines) were proposed and optimized; nine different working fluids were investigated; annualized costs for installing proposed ORC systems were estimated based on the optimization results. In addition, a sensitivity analysis was performed to identify the effect of uncertainties on the performance of the ORC systems. As a result, the ORC system for the medium-pressure engines with direct expansion, multi-condensation levels, and a high evaporation temperature exhibited the best performance in terms of exergy efficiency, net power output and actual annualized cost. These results demonstrate the possibility of replacing a typical LNG supply system with an ORC system. Full article
(This article belongs to the Special Issue Applications for the Organic Rankine Cycle)
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Open AccessArticle
Experimental Investigation on Performance of an Organic Rankine Cycle System Integrated with a Radial Flow Turbine
Energies 2019, 12(4), 724; https://doi.org/10.3390/en12040724
Received: 5 January 2019 / Revised: 18 February 2019 / Accepted: 19 February 2019 / Published: 22 February 2019
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Abstract
An experimental method is used to investigate the performance of a small-scale organic Rankine cycle (ORC) system which is integrated with a radial flow turbine, using 90 °C hot water as a heat source. The considered working fluids are R245fa and R123. The [...] Read more.
An experimental method is used to investigate the performance of a small-scale organic Rankine cycle (ORC) system which is integrated with a radial flow turbine, using 90 °C hot water as a heat source. The considered working fluids are R245fa and R123. The relationship between cycle performance and the operation parameters is obtained. With constant condensing pressure (temperature), the outlet temperature of the hot water, the mass flow rate of the hot water and the evaporator heat transfer rate increase with increasing evaporating pressure. Turbine isentropic efficiency decreases and transmission-generation efficiency increases with rising evaporating pressure. In the considered conditions, the maximum specific energy is 1.28 kJ/kg, with optimal fluid of R245fa and an optimal evaporating temperature of 69.2 °C. When the evaporating pressure (temperature) is constant, the outlet temperature of the cooling water increases, and the mass flow rate of the cooling water decreases with increasing condensing pressure. Turbine isentropic efficiency increases and transmission-generation efficiency decreases with the rise of condensing pressure. In the considered conditions, the maximum specific energy is 0.89 kJ/kg, with optimal fluid of R245fa and an optimal condensing temperature of 29.1 °C. Turbine efficiency is impacted by the working fluid type, operation parameters and nozzle type. Full article
(This article belongs to the Special Issue Applications for the Organic Rankine Cycle)
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Open AccessArticle
Investigation of an Innovative Cascade Cycle Combining a Trilateral Cycle and an Organic Rankine Cycle (TLC-ORC) for Industry or Transport Application
Energies 2018, 11(11), 3032; https://doi.org/10.3390/en11113032
Received: 1 October 2018 / Revised: 26 October 2018 / Accepted: 1 November 2018 / Published: 5 November 2018
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Abstract
An innovative cascade cycle combining a trilateral cycle and an organic Rankine cycle (TLC-ORC) system is proposed in this paper. The proposed TLC-ORC system aims at obtaining better performance of temperature matching between working fluid and heat source, leading to better overall system [...] Read more.
An innovative cascade cycle combining a trilateral cycle and an organic Rankine cycle (TLC-ORC) system is proposed in this paper. The proposed TLC-ORC system aims at obtaining better performance of temperature matching between working fluid and heat source, leading to better overall system performance than that of the conventional dual-loop ORC system. The proposed cascade cycle adopts TLC to replace the High-Temperature (HT) cycle of the conventional dual-loop ORC system. The comprehensive comparisons between the conventional dual-loop ORC and the proposed TLC-ORC system have been conducted using the first and second law analysis. Effects of evaporating temperature for HT and Low-Temperature (LT) cycle, as well as different HT and LT working fluids, are systematically investigated. The comparisons of exergy destruction and exergy efficiency of each component in the two systems have been studied. Results illustrate that the maximum net power output, thermal efficiency, and exergy efficiency of a conventional dual-loop ORC are 8.8 kW, 18.7%, and 50.0%, respectively, obtained by the system using cyclohexane as HT working fluid at THT,evap = 470 K and TLT,evap = 343 K. While for the TLC-ORC, the corresponding values are 11.8 kW, 25.0%, and 65.6%, obtained by the system using toluene as a HT working fluid at THT,evap = 470 K and TLT,evap = 343 K, which are 34.1%, 33.7%, and 31.2% higher than that of a conventional dual-loop ORC. Full article
(This article belongs to the Special Issue Applications for the Organic Rankine Cycle)
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