Review
Energy & Fuels
Pradeep Arjunan, Joselin Herbert Gnana Muthu, Suresh Lal Somanasari Radha, Abhilash Suryan
Summary: The performance of renewable energy systems can be significantly improved by utilizing low-temperature heat sources for power generation. The organic Rankine cycle (ORC) is suitable for this purpose and finds applications alongside solar power, geothermal power, waste heat, and biomass. ORC systems contribute to raising the effectiveness of renewable power sources and enable power generation at lower temperatures, such as on cloudy days. The main difference between ORC and the steam Rankine cycle lies in the working fluid used, with ORC using organic fluids and working at lower temperatures and pressure than the steam Rankine cycle.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Thermodynamics
Wameedh Khider Abbas Abbas, Matthias Linnemann, Elmar Baumhoegger, Jadran Vrabec
Summary: Organic Rankine cycles can convert low-temperature heat from sources like solar, geothermal, or biomass into electricity, contributing to meeting energy demand in an environmentally friendly manner. This study experimentally investigates the performance of a two-ORC system with high temperature (HT) and low temperature (LT) cycles, analyzing the thermodynamic characteristics and heat transfer between the cycles to maximize heat source utilization.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Lukasz Witanowski, Piotr Klonowicz, Piotr Lampart, Pawel Ziolkowaki
Summary: This paper focuses on the multi-objective efficiency optimization of a one-stage axial ORC turbine using an Implicit Filtering algorithm. The efficiency is improved in both modes of operation by changing the rotor profiles and the shape of endwall contours of the rotor domain.
Review
Engineering, Environmental
Mohammad Ja'fari, Muhammad Imran Khan, Sami G. Al-Ghamdi, Artur J. Jaworski, Faisal Asfand
Summary: In energy intensive industries, the use of ORC technology for waste heat recovery can enhance energy efficiency, reduce carbon emissions, and provide a solution for energy saving in the iron and steel sector, contributing to the fight against climate change.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Liuchen Liu, Jinlu Wu, Fen Zhong, Naiping Gao, Guomin Cui
Summary: This paper introduces a competitive combined heat and power system that integrates the organic Rankine cycle with the heat pump cycle using a built-in evaporator, achieving efficient waste heat recovery. Experimental results show significant energy and economic advantages of the system, with evaporation temperature having a notable impact on system performance.
Article
Green & Sustainable Science & Technology
Zhanying Zheng, Xiaoqiang Hong, Wei Wu, Yong-qiang Feng, Michael K. H. Leung
Summary: The presence of moisture in industrial exhaust gases can significantly increase the net power output of thermodynamic cycles used for electricity generation. In particular, the dual-pressure organic Rankine cycle shows the most convincing performance enhancement when compared to a simple organic Rankine cycle.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Thermodynamics
Guangli Fan, Yingjie Gao, Hamdi Ayed, Riadh Marzouki, Yashar Aryanfar, Fahd Jarad, Peixi Guo
Summary: The study shows that adding a recovery section to a single flash geothermal cycle can significantly improve system performance, increasing thermal efficiency, exergy efficiency, and overall output, while also reducing LCE from an economic perspective.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Jui-Ching Hsieh, Chun-Chieh Lai, Yen-Hsun Chen
Summary: The performance and economy of a waste heat recovery system with a fin tube heat exchanger and an organic Rankine cycle system were investigated. It was found that the temperature and mass flow rate of the flue gas had positive and negative effects on the output power, while the evaporation temperature had a positive effect on the effectiveness of the heat exchanger. Furthermore, the system performance and economy can be improved by adjusting the flow rate of the working fluid through the expander.
Article
Thermodynamics
Hong-Hu Zhang, Ming-Jia Li, Yong-Qiang Feng, Huan Xi, Tzu-Chen Hung
Summary: The feasibility of the combined steam Rankine cycle-Organic Rankine cycle system was investigated and verified through comparing and screening different working fluids. It was found that the addition of a regenerator can effectively improve the NPI of the ORC system. The combined system using ammonia and R600 as working fluid showed the largest NPI values.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Xia Zhou, Hanwei Zhang, Yangyiming Rong, Jian Song, Song Fang, Zhuoren Xu, Xiaoqin Zhi, Kai Wang, Limin Qiu, Christos N. Markides
Summary: The annual energy consumption of cryogenic air separation units in China is high, with a significant amount of energy dissipated as waste heat during compression processes. The use of organic Rankine cycle (ORC) based waste heat recovery systems can effectively recover and utilize this waste heat, bringing economic and environmental benefits. Case studies and analysis show that the ORC-m-VCR system performs the best when the expansion work-electricity conversion efficiency is low.
Article
Thermodynamics
Wenhuan Wang, Xiaoye Dai, Lin Shi
Summary: The study found that the thermal decomposition of hexamethyldisiloxane (MM) can have an impact on organic Rankine cycle systems, potentially leading to incomplete evaporation of working fluids and a decrease in net power and thermal efficiency.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Liyong Xin, Chao Liu, Luxi Tan, Xiaoxiao Xu, Qibin Li, Erguang Huo, Kuan Sun
Summary: HFO-1234yf was investigated for its thermal stability through an experimental system, revealing a pyrolysis temperature range of 170-190 degrees C and the presence of gas and liquid products. The study also explored the formation mechanism of liquid polymers and analyzed the optimal generation pathways of these polymers using DFT method, with theoretical calculations matching experimental results.
Article
Thermodynamics
Sepehr Sanaye, Ali Ghaffari
Summary: This study investigates the application of nanofluids to enhance the heat transfer rate in the heat exchangers of a proposed dual-loop RC-ORC heat recovery system. The effects of adding nanoparticles to the working fluids of a heat recovery system with two RC and ORC loops have not been previously studied. The system modeling incorporates appropriate single-phase/two-phase heat transfer coefficients for nanofluids, derived from experimental data. The performance of nanofluids in the proposed system is evaluated using a performance evaluation criterion (PEC). Optimization of the system using exergy efficiency and payback period as objective functions yielded a Pareto front for different nanofluids (mixtures of working fluids with four nanoparticles: Al2O3, CuO, Cu, and TiO2) at various volume fractions (0.5%, 1%, and 2%) that satisfied PEC > 1. The proposed dual-loop RC-ORC system with water/Cu nanofluid (volume percent of 2% for the RC loop) and 141b/Cu nanofluid (volume percent of 0.5% for the ORC loop) exhibited the most favorable performance, with higher thermal and exergy efficiencies and a lower payback period. Under these conditions, the thermal efficiency, exergy efficiency, turbine power output, and annual net profit of the proposed RC-ORC system increased by 4.4%, 17.2%, 15.4%, and 15.6% respectively.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Physics, Multidisciplinary
Saeed Khojaste Effatpanah, Mohammad Hossein Ahmadi, Seyed Hamid Delbari, Giulio Lorenzini
Summary: This paper presents a comprehensive emergy-based exergoeconomic method for studying the biomass combustion waste heat recovery organic Rankine cycle (BCWHR-ORC), considering thermodynamics, economics, and sustainability aspects. The analysis results reveal the performance characteristics of the system and provide insights for its overall efficiency and sustainability.
Article
Thermodynamics
Fabio Fatigati, Davide Di Battista, Roberto Cipollone
Summary: The study examines the concept of permeability in ORC-based waste heat recovery systems through experimental and theoretical approaches. It identifies key factors influencing this parameter and groups them into dimensionless factors to guide design and outline an easily implementable model-based control of the maximum plant pressure. The study validates these findings through a comprehensive mathematical model of the recovery unit tested on a fully instrumented ORC test bench, yielding a maximum recovered power of 3 kW and efficiency of 4.4%.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Roberto Pili, Alessandro Romagnoli, Manuel Jimenez-Arreola, Hartmut Spliethoff, Christoph Wieland
Article
Energy & Fuels
Sebastian Eyerer, Fabian Dawo, Johannes Kaindl, Christoph Wieland, Hart-Mut Spliethoff
Article
Energy & Fuels
Manuel Jimenez-Arreola, Christoph Wieland, Alessandro Romagnoli
Article
Thermodynamics
Fabian Dawo, Christoph Wieland, Hartmut Spliethoff
Article
Energy & Fuels
Ulrich Kleinhans, Christoph Wieland, Selahattin Babat, Hartmut Spliethoff
Article
Energy & Fuels
Manuel Wuerth, Moritz Becker, Peter Ostermeier, Stephan Gleis, Hartmut Spliethoff
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2019)
Article
Energy & Fuels
Felix Fischer, Michael Hauser, Maximilian Hauck, Stephan Herrmann, Sebastian Fendt, Hyeondeok Jeong, Christian Lenser, Norbert H. Menzler, Hartmut Spliethoff
ENERGY SCIENCE & ENGINEERING
(2019)
Article
Thermodynamics
Sebastian Eyerer, Fabian Dawo, Florian Rieger, Andreas Schuster, Richard Aumann, Christoph Wieland, Hartmut Spliethoff
Article
Energy & Fuels
Barbara Gumpert, Christoph Wieland, Hartmut Spliethoff
Article
Nuclear Science & Technology
T. Gschnaidtner, L. Aymerich Rodriganez, G. Lerchl, C. Wieland, H. Spliethoff
Article
Thermodynamics
A. Vandersickel, W. G. Wedel, H. Spliethoff
APPLIED THERMAL ENGINEERING
(2020)
Article
Green & Sustainable Science & Technology
S. Eyerer, C. Schifflechner, S. Hofbauer, W. Bauer, C. Wieland, H. Spliethoff
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2020)
Article
Energy & Fuels
Fabian Dawo, Sebastian Eyerer, Roberto Pili, Christoph Wieland, Hartmut Spliethoff
Summary: Organic Rankine Cycles (ORC) are a promising technology for converting low temperature heat sources into power, but detailed component models are necessary for design. This study conducted systematic experimental investigations and validated a semi-empirical model of twin-screw expanders to determine the optimum built-in volume ratio, achieving a maximum isentropic efficiency of 64%.
Review
Green & Sustainable Science & Technology
R. Duggal, R. Rayudu, J. Hinkley, J. Burnell, C. Wieland, M. Keim
Summary: This article discusses the technical feasibility of low-temperature geothermal energy extraction in hydrocarbon fields, emphasizing the importance of economic, technical, and geological parameters. It also highlights the uncertainty of resource behavior and the lack of discussion on sustainable resource management in such fields. Reservoir and wellbore simulations are suggested to improve understanding of resource behavior and evaluate reservoir capability for longer sustainability.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Economics
Albert Biber, Christoph Wieland, Hartmut Spliethoff
Summary: As energy supplies shift towards renewable energy, conventional power plants need to improve flexibility to balance the volatility. The integration of energy storage devices proves helpful in increasing ramp-rates and reducing minimum-load. A valuation tool based on market data showed that pumped hydro storage systems and power-to-gas systems can improve profitability, while other storage types require additional market opportunities. Battery storage systems can reduce ramp time but are not suitable for day-ahead and intra-day markets.
Article
Thermodynamics
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)
