Article
Thermodynamics
Bohong Wang, Olga Arsenyeva, Min Zeng, Jiri Jaromir Klemes, Petar Sabev Varbanov
Summary: This paper presents a method for optimizing heat exchanger networks (HEN) by incorporating detailed plate heat exchanger (PHE) design. The method utilizes a mathematical model and a graphical tool to optimize the HEN structure and select suitable heat exchanger types. The case study demonstrates that using brazed plate heat exchangers can significantly reduce investment costs.
Article
Green & Sustainable Science & Technology
Dianliang Fu, Zeting Yu, Yanhua Lai
Summary: The article discusses the use of the shifted temperature driving force plot in retrofitting heat exchanger networks to optimize heat exchange and avoid crossing the network pinch, resulting in more efficient energy recovery. Through the application of this graphical tool, better retrofit solutions can be found with improved economic benefits.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Green & Sustainable Science & Technology
Bohong Wang, Jiri Jaromir Klemes, Nianqi Li, Min Zeng, Petar Sabev Varbanov, Yongtu Liang
Summary: This paper reviews the characteristics, working conditions, and investment costs of various types of heat exchangers, as well as introduces a framework for HEN retrofit considering heat exchanger and material selection. The retrofit design process is divided into diagnosis and optimization stages, utilizing graphical decision-making tools and optimization algorithms to analyze and optimize existing HEN systems. By selecting suitable types of new heat exchangers and materials, the retrofitted design can significantly reduce utility costs.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Thermodynamics
Bohong Wang, Jiri Jaromir Klemes, Petar Sabev Varbanov, Min Zeng, Yongtu Liang
Summary: This study introduces a method based on the Advanced Grid Diagram to optimize Heat Exchanger Networks (HENs) design considering prohibited and restricted matches. The approach first determines a pre-designed HEN and then performs a topology evolution to trade off prohibitions and evaluate restrictions, providing designers with guidance on implementing restricted matches.
Article
Thermodynamics
Nianqi Li, Jinghan Wang, Jiri Jaromir Klemes, Qiuwang Wang, Petar Sabev Varbanov, Weisheng Yang, Xia Liu, Min Zeng
Summary: This study focuses on energy conservation and efficiency improvement for industrial process systems, particularly through heat transfer enhancement in heat exchanger network retrofit. A target-evaluation method is proposed and validated through two case studies, showing that enhancing the best candidate heat exchanger can bring more energy-saving and better economic efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Sin Yong Teng, Akos Orosz, Bing Shen How, Jeroen J. Jansen, Ferenc Friedler
Summary: Retrofit HEN optimization is a unique problem that requires considering existing structures and is particularly difficult due to the integration of existing and newly acquired equipment. Using the P-graph framework, this study demonstrates the capability of finding the optimal topology within the constrained space and highlights the economic and energy benefits.
Article
Engineering, Chemical
Kexin Xu, Kang Qin, Hao Wu, Robin Smith
Summary: Improving energy efficiency in heat exchanger networks is still a significant problem, especially in energy-intensive operations. This study proposes a step-by-step automated retrofit approach based on Pinch Analysis and utilizes high-efficiency plate heat exchangers for retrofit. The results show that this method is flexible and applicable to various retrofit problems.
Article
Thermodynamics
Mariusz Markowski, Krzysztof Urbaniec, Witold Suchecki, Sandra Storczyk
Summary: This paper proposes a new approach for minimizing energy losses in heat exchanger network (HEN) retrofit by using condensate subcooling phenomena. The approach involves the thermally coupled utility system and combined heat and power (CHP) plant. The study demonstrates the suitability of improved condensate management as a retrofit measure and shows the potential for increased heat recovery and additional power generation.
Article
Thermodynamics
Raju Gollangi, K. NagamalleswaraRao
Summary: An integrated Exergetic evaluation method was proposed to improve energy utilization and achieve environmental sustainability. Analysis on thermodynamic derivatives revealed areas of high exergy destruction, with retrofit design identified as a possible solution to reduce exergy losses and improve process efficiency. The total energy and exergy efficiencies were calculated to be 85.45% and 93.9% respectively.
Article
Computer Science, Interdisciplinary Applications
Bohong Wang, Petar Sabev Varbanov, Jiri Jaromir Klemes, Xia Liu, Weisheng Yang
Summary: Heat exchanger leakage can lead to equipment shutdown, affecting production economy and equipment safety. This study introduces a quantitative risk characterization of leakage into the Heat Integration dataset using a mathematical model and iteration algorithm, allowing engineers to use a quantitative criterion for HI.
COMPUTERS & CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Jui-Yuan Lee, Po-Yu Chen
Summary: Energy efficiency plays a crucial role in decarbonizing the global energy system by reducing energy consumption in various sectors. In the industrial processes, improving energy efficiency can be achieved through heat recovery via heat exchange. This study develops a mathematical programming model for optimizing heat exchanger networks, taking into account the phase change of process streams. The model is applied to a case study of an ethylene glycol production plant, demonstrating the compromise between steam savings and process feasibility.
Article
Green & Sustainable Science & Technology
Riccardo Bergamini, Alireza Moussavi, Hamid Reza Shahhosseini, Tuong-Van Nguyen, Lorenzo Bellemo, Brian Elmegaard, Paul Stuart
Summary: The bridge framework is a systematic decision-making support tool for process integration retrofit of industrial plants. It rigorously analyzes industrial processes, provides valuable insights for analysts, and aids in open-ended decision-making activities.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Jaehoon Sim, Hyoin Lee, Ji Hwan Jeong
Summary: A variable-path heat exchanger (VPHE) was proposed for optimizing the heat exchanger of an outdoor unit in a heat pump system. Numerical analysis and experimental measurements showed that the VPHE significantly improved heat transfer capacity and coefficient of performance, demonstrating potential for enhancing overall system performance.
Article
Thermodynamics
Stanislav Boldyryev, Tatyana Gil, Mariia Ilchenko
Summary: Retrofit of the heat exchanger network plays an important role in improving energy efficiency and reducing emissions in the process industry. This paper proposes an approach for economic and environmental assessment of retrofit options based on historical data and energy price trends. Through a case study, the economic and environmental indicators of three retrofit options under different energy price scenarios are analyzed. The results show that the most effective retrofit option varies depending on the energy price levels, with the option that achieves the greatest energy and emission savings being the most effective during periods of high energy prices. This method provides decision-makers with a tool to evaluate retrofit projects under different economic conditions and can be applicable in other process industries.
Article
Energy & Fuels
Xiaojing Sun, Yu Zhuang, Linlin Liu, Yachao Dong, Lei Zhang, Jian Du
Summary: Thermodynamic cycles and heat exchange technologies play important roles in waste heat recovery, and their cooperation can improve energy efficiency. By developing an integrated system and a multi-objective optimization model, it is possible to achieve a balance between economic and thermodynamic objectives, resulting in favorable economic and thermodynamic performances.
Article
Thermodynamics
Krzysztof Barnas, Tomasz Jelenski, Marzena Nowak-Oclon, Kinga Racon-Leja, Elzbieta Radziszewska-Zielina, Bartlomiej Szewczyk, Grzegorz Sladowski, Cezary Tos, Petar Sabev Varbanov
Summary: This paper proposes a comprehensive adaptation approach for prefabricated panel-block buildings, targeting Eastern Bloc countries' technologies. The approach utilizes Geographic Information Systems, urban and social analysis, and Multi-Criteria Decision-Making methods for thermal retrofitting and addressing accessibility and public space deficiencies. The proposed model includes an energy audit and measures to reduce energy consumption, potentially saving users up to 80% of their current energy consumption and related emissions.
Article
Mechanics
Lei Chen, Yifan Wang, Jiri Jaromir Klemes, Jin Wang, Wenquan Tao
Summary: This study investigates the collision between a single coarse particle and a wall in a viscous media using a Hertz-Mindlin no-slip contact model. The results show that the impact velocity and viscosity of the media have significant effects on the contact processes and contact force. This research is important for optimizing flow conveying systems, reducing attrition, and improving economic development.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2023)
Article
Thermodynamics
Andrii Polyvianchuk, Roman Semenenko, Petro Kapustenko, Jiri Jaromir Klemes, Olga Arsenyeva
Summary: The work proposes a novel methodology for the transition to 4th generation district heating systems (DHS) with limited investment. The methodology involves step-by-step implementation of required innovations to optimize investment schedule and payback time. Two case studies illustrated the methodology, showing a significant reduction in energy consumption and lower investments compared to traditional simultaneous implementation. The introduction of new generation DHS in Ukraine can be achieved through gradual additions and integration of new elements to the existing system.
Article
Thermodynamics
Hon Huin Chin, Petar Sabev Varbanov, Jiri Jaromir Klemes, Zdravko Kravanja
Summary: Circular Economy is a well-known concept to tackle global resource depletion problems, and its sustainability and environmental performance are closely related to energy consumption. This work presents an assessment tool called Energy Quality Pinch Analysis, which determines the minimum energy requirements for a circular system and demonstrates its sustainability. The analysis considers cascades of energy used and released in recycling and symbiosis processes, evaluating the minimal external energy flows. Case studies on heat and power integration, chemical energy reuse in wastewater systems, and municipal solid waste management have shown the potential for high energy recovery rates, providing valuable guidance for system designers.
Article
Thermodynamics
Kok Sin Woon, Zhen Xin Phuang, Jan Taler, Petar Sabev Varbanov, Cheng Tung Chong, Jirf Jaromfr Klemes, Chew Tin Lee
Summary: Climate change is a major long-term threat to humanity. Transforming urban energy from carbon-intensive to carbon-free solutions is crucial for achieving carbon neutrality. This review discusses recent advances in green energy development in urban sectors, including industry, buildings, transportation, and waste treatment. It highlights the need for developing novel energy materials, improving energy storage capacity, reducing vulnerability of renewable sources, optimizing modeling, and enhancing engineering design. The challenges and recommendations for green energy development in environmental, economic, and societal aspects are summarized, along with the importance of minimizing energy consumption in waste treatment. Innovations in technology, institutional regulations, incentives, and behavioral changes are necessary for achieving carbon neutrality in urban environments.
Article
Thermodynamics
Yifan Xu, Mengmeng Ji, Jiri Jaromir Klemes, Hengcong Tao, Baikang Zhu, Petar Sabev Varbanov, Meng Yuan, Bohong Wang
Summary: This paper investigates the economic viability of transforming renewable energy into exportable electricity or hydrogen. A comprehensive renewable energy system model is developed based on the P-graph to simulate an energy system that integrates electricity, heat, and hydrogen on a virtual island. Findings from the case study show that exporting extra renewable energy by electricity is cheaper than using hydrogen for the studied island, and the optimal dispatch structure can deliver 51 GWh of electricity annually for 292 M CNY (about 42 M EUR). A sensitivity analysis of export prices and renewable energy uncertainty verifies the economics of electricity export.
Article
Thermodynamics
Dariusz Jakubek, Pawel Oclon, Marzena Nowak-Oclon, Maciej Sulowicz, Petar Sabev Varbanov, Jirf Jaromfr Klemes
Summary: This paper analyzes the heat losses from pre-insulated pipes and twin pipes in the heating system network. By comparing the measurements on a dedicated experimental setup with analytical calculations, the results show good agreement. The economic analysis indicates that a return on investment is expected after 5 years when comparing twin-pipe systems and single-pipe pre-insulated heating networks.
Article
Green & Sustainable Science & Technology
Kathleen B. Aviso, Jonna C. Baquillas, Anthony S. F. Chiu, Peng Jiang, Yee Van Fan, Petar Sabev Varbanov, Jirf Jaromfr Klemes, Raymond R. Tan
Summary: Plastic pollution is a serious sustainability issue that affects both terrestrial and aquatic ecosystems, as well as air quality. The COVID-19 pandemic has further worsened the problem. Socio-economic barriers hinder the large-scale commercial use of plastic recycling technologies, with mixed plastic streams often being contaminated due to imperfect waste segregation. This study introduces the concept of Plastics Recycling Networks and develops linear programming and mixed-integer linear programming models to match waste plastic sources with recycling plants. The models consider the tolerance of recycling plants towards contaminants, and two case studies demonstrate their effectiveness. Policy implications for mitigating plastic pollution are also discussed.
CLEANER ENGINEERING AND TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Yiming Li, Dapeng Sun, Tianyang Xia, Petar Sabev Varbanov, Xingan Liu, Tianlai Li
Summary: Chinese solar greenhouse (CSG) is essential for sustainable agriculture as it allows year-round vegetable cultivation without energy consumption or carbon emissions. However, frost damage during winter production is common in high latitudes and cold regions. To improve the thermal insulation of unheated CSG, a novel internal insulation method was proposed.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Dan Zheng, Yifan Xue, Jin Wang, Petar Sabev Varbanov, Jiri Jaromir Klemes, Chungen Yin
Summary: Green hydrogen production through photocatalytic water splitting has significant potential for sustainable energy production. This review focuses on high-performance photocatalysts, which play a crucial role in enhancing the efficiency of photocatalytic hydrogen production. It provides an overview of the principles and factors affecting photocatalytic performance, and comprehensively reviews conventional semiconductor photocatalysts and their catalytic activity enhancement methods. Additionally, it discusses representative nano-photocatalysts and optimization strategies. The review also summarizes the performance, challenges, and future research directions of photocatalysts of different dimensions, serving as a valuable guide for the application of high-performance photocatalysts in green hydrogen production and offering insight into the latest advancements in photochemical conversion efficiency.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Farid Amirkhani, Amir Dashti, Mojtaba Jokar, Amir H. Mohammadi, Abdoulmohammad Gholamzadeh Chofreh, Petar Sabev Varbanov, John L. Zhou
Summary: This study investigates the accuracy of the most up-to-date computational approaches in CO2 capture and gas purification. The GA-RBF model shows the highest accuracy among the developed methods.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Energy & Fuels
Olga Arsenyeva, Leonid Tovazhnyanskyy, Petro Kapustenko, Jiri Jaromir Klemes, Petar Sabev Varbanov
Summary: A plate heat exchanger (PHE) is a modern and efficient heat transfer equipment, capable of enhancing heat recuperation and energy efficiency. This paper reviews the construction and exploration developments of PHEs, as well as the methods of heat transfer intensification. The use of inclined corrugations on the surface of PHE plates is a common method to improve performance.
Proceedings Paper
Green & Sustainable Science & Technology
Olga Arsenyeva, Jiri Jaromir Klemes, Petar Sabev Varbanov, Petro Kapustenko
Summary: The reduction of fossil fuels consumption is crucial today. The application of modern technologies for heating residential apartments and hot water supply poses challenges. Reliable regulation of temperatures inside apartments requires quick-respond and accurate control techniques for the equipment used. This study proposes a parametric model predictive control technique for water flowrate control of the butterfly type valve used in temperature and flowrate regulation of individual heat substations in centralized heating systems. The model improves non-linear characteristics, resulting in better flow control quality.
SMART TECHNOLOGIES IN URBAN ENGINEERING, STUE-2022
(2023)
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)
