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Energies
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Recent Advances in Organic Rankine Cycle (ORC)
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Recent Advances in Organic Rankine Cycle (ORC)

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

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 9799

Special Issue Editors

Prof. Dr. Tzu-Chen Hung

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Guest Editor
Department of Mechanical Engineering; National Taipei University of Technology, Taipei, Taiwan
Interests: organic Rankine cycle; nuclear technology; passive heat transfer
Dr. Yong-Qiang Feng

E-Mail Website
Guest Editor
School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
Interests: organic Rankine cycle; heat pump; combined cooling, heating, and power
Special Issues, Collections and Topics in MDPI journals
Dr. Huan Xi

E-Mail Website1 Website2
Guest Editor
School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
Interests: waste heat recovery; organic Rankine cycle; energy storage

Special Issue Information

Dear Colleagues,

Organic Rankine cycle (ORC) systems are simple, inexpensive, and easy to use, and have been widely adopted for low-temperature waste heat recovery and renewable energy utilization. However, there are still several challenges for ORC and related systems, such as increasing energy efficiency, improving operation reliability, building effective components, reducing the costs of components and systems, reducing environmental impact, and so on. The purpose of this Special Issue is to attract state-of-the-art research and review articles on ORC systems and components, in a wide range of topics, including the following:

  • ORC and polygeneration systems
  • CO2 power cycles
  • Environmentally friendly organic fluids for power generation
  • Experimental studies of ORC and related thermodynamic systems
  • Turbine, heat exchanger, and pump design of ORC system
  • New integrations of ORC with other energy systems
  • Industrial applications of ORC
  • All topics related to ORC

Prof. Dr. Tzu-Chen Hung
Dr. Yong-Qiang Feng
Dr. Huan Xi
Guest Editors

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 submissions that pass pre-check are 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 2600 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 (ORC)
  • polygeneration systems
  • CO2 power cycles
  • power generation
  • thermodynamic systems
  • turbine, heat exchanger
  • energy systems
  • industrial applications

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Published Papers (4 papers)

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Research

19 pages, 2827 KiB  
Article
Optimization Design of the Organic Rankine Cycle for an Ocean Thermal Energy Conversion System
by Xiaowei Yang, Yanjun Liu, Yun Chen and Li Zhang
Energies 2022, 15(18), 6683; https://doi.org/10.3390/en15186683 - 13 Sep 2022
Cited by 3 | Viewed by 1663
Abstract
This study selects five parameters as decision variables for the optimization design of an ocean thermal energy conversion system, including the evaporating temperature, the condensing temperature, the pinch-point temperature difference between the evaporator and condenser, and the working fluid flow rate. The optimization [...] Read more.
This study selects five parameters as decision variables for the optimization design of an ocean thermal energy conversion system, including the evaporating temperature, the condensing temperature, the pinch-point temperature difference between the evaporator and condenser, and the working fluid flow rate. The optimization goal is to maximize the net output power per unit area and the exergy efficiency. The final scheme is comprehensively screened out from the Pareto solution set through some evaluation indexes. Finally, this study also analyzes the effects of four decision variables on the optimization objectives and the evaluation indexes. This study finds that evaporating temperature and condensing temperature have similar effects on the two objective functions. However, the pinch-point temperature difference has different effects on them. The back work ratio is obviously affected by the condensing temperature. A small pinch-point temperature difference is beneficial and improves the performance of an ocean thermal energy conversion system. The effects of evaporating temperature and condensing temperature on the investment cost per unit net output power are roughly similar to those on the net output power per unit heat exchange area. However, the effects of the pinch-point temperature difference on the two performance aspects are inconsistent. Full article
(This article belongs to the Special Issue Recent Advances in Organic Rankine Cycle (ORC))
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14 pages, 1871 KiB  
Article
Operation Control and Performance Analysis of an Ocean Thermal Energy Conversion System Based on the Organic Rankine Cycle
by Xiaowei Yang, Yanjun Liu, Yun Chen and Li Zhang
Energies 2022, 15(11), 3971; https://doi.org/10.3390/en15113971 - 27 May 2022
Cited by 1 | Viewed by 1907
Abstract
The development and utilization of marine renewable energy is an important measure for achieving energy conservation, emissions reduction and carbon neutrality. Ocean thermal energy is the most stable energy among all the types of marine renewable energy. This paper built a simulation model [...] Read more.
The development and utilization of marine renewable energy is an important measure for achieving energy conservation, emissions reduction and carbon neutrality. Ocean thermal energy is the most stable energy among all the types of marine renewable energy. This paper built a simulation model of an ocean thermal energy conversion system based on actual device specifications by Aspen and MATLAB and put forward a corresponding control strategy. The opening control signal of the control valve at the turbine inlet was the condenser inlet pressure in this paper, and the frequency control of the working fluid pump depended on the evaporating pressure and flow rate of the working fluid. This paper analyzed the key operating parameter changes of the system under different working conditions. According to the analysis results, the turbogenerator in this system was able to generate 50 kW power for about 8 months per year. The highest net output power of the Organic Rankine Cycle was 47.3 kW; the highest cycle thermal efficiency was 3.2%. Full article
(This article belongs to the Special Issue Recent Advances in Organic Rankine Cycle (ORC))
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15 pages, 2055 KiB  
Article
Application of ORC in a Distributed Integrated Energy System Driven by Deep and Shallow Geothermal Energy
by Hongmei Yin, Likai Hu, Yang Li, Yulie Gong, Yanping Du, Chaofan Song and Jun Zhao
Energies 2021, 14(17), 5466; https://doi.org/10.3390/en14175466 - 2 Sep 2021
Cited by 3 | Viewed by 2046
Abstract
This study presents a distributed integrated energy system driven by deep and shallow geothermal energy based on forward and reverse cycle for flexible generation of cold, heat and electricity in different scenarios. By adjusting the strategy, the system can meet the demand of [...] Read more.
This study presents a distributed integrated energy system driven by deep and shallow geothermal energy based on forward and reverse cycle for flexible generation of cold, heat and electricity in different scenarios. By adjusting the strategy, the system can meet the demand of heat-electricity in winter, cool-electricity in summer and electricity in transition seasons. The thermodynamic analysis shows that the thermal efficiency of the integrated energy system in the heating and power generation mode is 16% higher than that in the cooling and power generation mode or the single power generation mode. Meanwhile, the annual heat-obtaining quantity of the system is reduced by 11% compared with that of the independent power generation system, which effectively alleviates the imbalance of the temperature field of the shallow geothermal reservoir. In terms of net power generation, the integrated energy system can generate approximately 31% more electricity than the conventional independent cooling and heating system under the same cooling and heating capacity. An integrated system not only realizes the comprehensive supply of cold and thermal ower by using clean geothermal efficiency, but also solves the temperature imbalance caused by the attenuation of a shallow geothermal temperature field. It provides a feasible way for carbon emission reduction to realize sustainable and efficient utilization of geothermal energy. Full article
(This article belongs to the Special Issue Recent Advances in Organic Rankine Cycle (ORC))
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22 pages, 5934 KiB  
Article
Multi-Objective Optimization and Fluid Selection of Different Cogeneration of Heat and Power Systems Based on Organic Rankine Cycle
by Shiyang Teng, Yong-Qiang Feng, Tzu-Chen Hung and Huan Xi
Energies 2021, 14(16), 4967; https://doi.org/10.3390/en14164967 - 13 Aug 2021
Cited by 12 | Viewed by 2025
Abstract
Cogeneration of heat and power systems based on the organic Rankine cycle (ORC-CHP) has been proven to be an effective way to utilize waste heat at medium and low temperatures. In this work, three ORC-CHP (combined heat and power based on organic Rankine [...] Read more.
Cogeneration of heat and power systems based on the organic Rankine cycle (ORC-CHP) has been proven to be an effective way to utilize waste heat at medium and low temperatures. In this work, three ORC-CHP (combined heat and power based on organic Rankine cycle) systems are simulated and compared, including the SS (serial system), the CS (the condensation system), and the SS/CS. The multi-objective genetic algorithm (MOGA) is used to optimize the three systems respectively to achieve higher exergy efficiency and profit ratio of investment (PRI). The optimal thermal-economic performance is obtained. Twelve organic fluids are adopted to evaluate their performance as working fluids. The calculation results show that SS has the highest exergy efficiency, while SS/CS has the best economic performance. Compared with the highest exergy efficiency of SS and the best economic performance of SS/CS, CS will be the optimal solution considering these two objective functions. Under the optimal working conditions, SS has the highest thermal efficiency because it has the highest net power output. The components with the largest proportion of exergy destruction are the heat exchangers, which also has the highest cost. Full article
(This article belongs to the Special Issue Recent Advances in Organic Rankine Cycle (ORC))
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