Article
Thermodynamics
Bisma Sarfaraz, Bilal Kazmi, Syed Ali Ammar Taqvi, Faizan Raza, Rushna Rashid, Leenah Siddiqui, Syeda Fatima Zehra, Awais Bokhari, Jiri Jaromir Klemes, Mohamed Ouladsmane
Summary: The dual mixed-refrigeration process achieves higher liquefaction of natural gas by improving both the refrigeration cycles and refrigerant combinations. Multiple mixed refrigerants are used, which has a significant impact on reducing energy consumption. This study proposes a methodology for selecting MR components based on their thermodynamic behavior and evaluates the process using the 3E model. The findings demonstrate that increasing the number of components and optimizing the process can significantly reduce energy consumption and improve efficiency.
Article
Engineering, Chemical
Ting He, Wensheng Lin
Summary: The study focuses on proposing three dual mixed refrigerant processes for high-ethane content natural gas liquefaction, with results showing that the process compressing natural gas after distillation has the lowest power consumption. Additionally, case studies on mixed refrigerant investigate the effects of refrigerant selection on process performance.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Chulmin Hwang, Taejong Yu, Youngsub Lim
Summary: This study investigates the impact of reducing the number of mixed refrigerants on the efficiency of small-scale liquefaction processes for ships. It was found that reducing the number of refrigerants to 3 leads to a significant decrease in efficiency.
Article
Green & Sustainable Science & Technology
Ting He, Wensheng Lin
Summary: Utilizing natural cold sources for winter precooling can significantly reduce energy consumption in natural gas liquefaction processes, while achieving significant production increase potential without increasing compressor volume flow. This approach leads to substantial energy and cost savings.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Ali Rehman, Muhammad Abdul Qyyum, Kinza Qadeer, Fatima Zakir, Xiufen He, Alam Nawaz, Moonyong Lee, Li Wang
Summary: The study presents a systematic approach to improve the energy efficiency of the single mixed refrigerant (SMR) process by identifying improvement potentials, operational optimization, and uncovering further enhancement potentials. Results show that significant energy savings and high efficiency can be achieved through optimization and process retrofitting, indicating the importance of improving the interconnection between process equipment for overall efficiency.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Energy & Fuels
Lei Gao, Jiaxin Wang, Maxime Binama, Qian Li, Weihua Cai
Summary: This paper summarizes the current research status and development level in the design and optimization of natural gas liquefaction processes in recent years. It compares and analyzes the advantages and disadvantages of various liquefaction processes and introduces the rapid development of pressurized liquefaction technology and its application outlooks.
Article
Thermodynamics
Saman Faramarzi, Seyed Mojtaba Mousavi Nainiyan, Mostafa Mafi, Ramin Ghasemiasl
Summary: A novel hydrogen liquefaction cycle was proposed in this study, which integrates wasted cold energy to reduce power consumption. The specific energy consumption and total annual cost of the proposed model were found to be lower than those of similar cycles mentioned in the literature.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
Article
Thermodynamics
Bilal Kazmi, Junaid Haider, Syed Ali Ammar Taqvi, Muhammad Abdul Qyyum, Syed Imran Ali, Zahoor Ul Hussain Awan, Hankwon Lim, Muhammad Naqvi, Salman Raza Naqvi
Summary: The study proposes a novel integrated process using ionic liquid to control CO2 emissions from natural gas and achieve safe long-distance transportation through liquefaction. Solvent screening and performance analysis identify a potential solvent for natural gas sweetening. Economic analysis shows that this process has lower total and unit costs compared to other solvents.
Article
Thermodynamics
Jinwoo Park, Haneul Mun, Junghwan Kim, Inkyu Lee
Summary: The study proposes an advanced natural gas liquefaction process utilizing liquid air, which improves efficiency, reduces costs, and enhances sustainability by incorporating cold energy recovery.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Jinliang Geng, Heng Sun
Summary: A novel integrated liquefaction process utilizing a modified double mixed refrigerant process pre-cooling is proposed and analyzed to enhance the energy efficiency of hydrogen liquefaction. The process achieves compactness through a three-stage adiabatic ortho-para hydrogen conversion. Optimal decision variables are determined using the particle swarm optimization algorithm. The results show a 15.83% decrease in total specific energy consumption compared to the base case, along with high thermodynamic performance indicators.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Jingxuan Xu, Wensheng Lin
Summary: This paper proposes an innovative and efficient method utilizing hydrogen-rich industrial by-products to coproduce liquid hydrogen and liquefied natural gas. Three helium reverse Brayton cycles are constructed and optimized, with specific power consumptions ranging from 21.94-54.78 kWh/kmol and exergy efficiencies between 13.0% and 66.5%.
Article
Thermodynamics
Matheus A. M. Pereira, Lucas F. Santos, Mauro A. S. S. Ravagnani, Caliane B. B. Costa, Jose A. Caballero
Summary: This paper compares five different mixed-refrigerant liquefaction processes in terms of energy and economic efficiency for different natural gas processing scales. The results show that the most complex process, AP-X, has the lowest energy consumption, but it may not necessarily provide a higher economic return.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Engineering, Chemical
Fernando Almeida-Trasvina, Robin Smith, Megan Jobson
Summary: This paper demonstrates that structurally modifying the configuration of SMR cycles can yield significant savings in shaft work demand with low added complexity, based on a case study for natural gas liquefaction at small scale. The results show that the novel SMR cycle achieves 10% savings in shaft work demand compared to the PRICO SMR cycle, showcasing its potential for enhancing energy efficiency in LNG production.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Chemical
Ray Soujoudi, Randall Manteufel
Summary: The study investigates the feasibility of using environmentally friendly refrigerant compound, ammonia, in the LNG pre-cooling cycle, showing that increasing ammonia's concentration in the mixed refrigerants can enhance performance and reduce energy consumption. Economic analyses reveal that MR-1 mixed refrigerant benefits the most from higher ammonia concentration, resulting in lower capital and operational costs.
Article
Engineering, Chemical
Lucas F. Santos, Caliane B. B. Costa, Jose A. Caballero, Mauro A. S. S. Ravagnani
Summary: The design of an energy-efficient SMR liquefaction process was optimized using a simulation-optimization approach in Aspen HYSYS(R) and MATLAB(R), resulting in a significantly lower network duty of 750.2 kJ per kg of natural gas compared to literature reports. The process involved modifying the flowsheet and incorporating hydraulic turbines and flash separators between compression stages.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Muhammad Abdul Qyyum, Ihsanullah Ihsanullah, Rizwan Ahmad, Sherif Ismail, Amin Khan, Abdul-Sattar Nizami, Ahmed Tawfik
Summary: This study presents the potential of using real industrial wastewater for hydrogen production and discusses recent trends in bioreactors with a focus on commercial and economic aspects. The breakthroughs in lab-based and pilot-scale research are explained, highlighting the significant role of different bioreactors and commercialization in developing sustainable energy. Immobilization, high-loaded reactors, and sequential dark and photo-fermentation are viable methods for implementing and commercializing biohydrogen reactors. Microbial electrolytic cell is considered a more promising technology for hydrogen production due to its better control over hydrogen generation rate and effective conversion of organic feedstock.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Ahmed Tawfik, Khaled Hasanan, Mahmoud Abdullah, Omnia A. Badr, Hanem M. Awad, Mohamed Elsamadony, Ali El-Dissouky, Muhammad Abdul Qyyum, Abdul-Sattar Nizami
Summary: The study found that using MAR-G(n) as an electron acceptor can effectively detoxify 4-NP in wastewater, reducing the IC50 value and achieving efficient removal of 4-NP and 4-AP. By combining multistage anaerobic reactor and baffled high rate algal pond, the ultimate goal of effective wastewater treatment is achieved.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Ahmad Naquash, Muhammad Abdul Qyyum, Junaid Haider, Awais Bokhari, Hankwon Lim, Moonyong Lee
Summary: This review evaluates conventional biogas upgrading technologies and finds that cryogenic technology is the most energy- and cost-intensive, but can provide dual benefits when integrated with liquefaction. Other emerging cryogenic technologies in biogas upgrading need further exploration and discussion.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Energy & Fuels
Hafiz Muhammad Uzair Ayub, Muhammad Rafiq, Muhammad Abdul Qyyum, Ghazala Rafiq, Gyu Sang Choi, Moonyong Lee
Summary: An artificial neural network model is developed to estimate process parameters of an integrated biomass gasification power plant. The model predicts gasification temperature and air to fuel ratio, making it suitable for various biomass feedstocks in power generation systems.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Thermodynamics
Javed Khan, Muhammad Waqas Saif-ul-Allah, Muhammad Abdul Qyyum, Faisal Ahmed, Muhammad Yasin, Arif Hussain, Zeeshan Gillani, Aqeel Ahmed Bazmi
Summary: This study proposes a teaching-learning self-study optimization approach to optimize the biogas upgrading and biomethane liquefaction processes, resulting in a reduction in specific energy consumption and an increase in energy efficiency. The results show a 15.4% decrease in specific energy consumption for the overall process. The study also reveals a significant improvement in the exergetic efficiency of the upgrading process and an overall increase in sustainability index.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Junaid Haider, Boreum Lee, Changgwon Choe, Muhammad Abdul Qyyum, Su Shiung Lam, Hankwon Lim
Summary: Integrated energy systems can achieve synergistic effects on energy efficiency and process economy. This study demonstrates the integration of multiple processes to improve the efficiency and environmental performance of synthetic natural gas (SNG) production.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Physical
Xihan Tan, Zhangfeng Shen, Awais Bokhari, Muhammad Abdul Qyyum, Ning Han
Summary: This article discusses the principle, preparation method, and application of perovskite-type proton conductor hydrogen permeable membrane. It also explores the development trend of this material.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Amjad Riaz, Muhammad Abdul Qyyum, Arif Hussain, Moonyong Lee
Summary: This article examines the liquefaction process of hydrogen, with a focus on the conversion reaction between orthohydrogen and parahydrogen. Through parametric analysis of the conversion reaction, it is found that current process design approaches need to be revised, and an alternative method for simulating the reaction is proposed. The study's findings open avenues for in-depth analysis and optimization approaches to establish a holistic framework for future integrated energy systems.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Environmental Sciences
Ahmad Naquash, Muhammad Abdul Qyyum, Yus Donald Chaniago, Amjad Riaz, Fatma Yehia, Hankwon Lim, Moonyong Lee
Summary: This study evaluated membrane-assisted (case-I) and cryogenic-assisted (case-II) hydrogen (H2) separation and purification technologies in terms of energy, exergy, and economic aspects. The results showed that case-I had lower energy consumption, higher exergy efficiency, but higher cost than case-II. This study can assist industry practitioners and academic researchers in selecting optimal H2 separation and purification technologies.
Article
Thermodynamics
Muhammad Abdul Qyyum, Ahmad Naquash, Noman Raza Sial, Moonyong Lee
Summary: Small-scale LNG processes face challenges of low energy efficiency and high process costs. A dual-phase expander-based process assisted by CO2 precooling has been proposed to improve these issues. Among the proposed cases, using CO2 precooling and C2/N2 liquefaction is the most energy-efficient and cost-effective option.
Article
Chemistry, Physical
Nawaf S. Alhajeri, Mohamed Eraky, Muhammad Abdul Qyyum, Ahmed Tawfik
Summary: Valorization of fatty restaurant waste is a promising method for economic and environmental benefits, but the lipid fraction hampers the hydrogen fermentation process. In this study, three staged hybrid reactors were used for lipid degradation and H2 harvesting from co-digestion of fatty restaurant waste and grey water. The hydrogen harvesting volumes were 0.3 ± 0.02 L/L.d in HR1, 0.22 ± 0.1 LH2/L.d in HR2, and 0.11 ± 0.06 LH2/L.d in HR3. Different microbial phyla were dominant in each reactor, indicating the impact of staging on microbial composition.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Ahmad Naquash, Amjad Riaz, Muhammad Abdul Qyyum, Gwangsik Kim, Moonyong Lee
Summary: This study presents a simple yet efficient approach, known as knowledge-based optimization (KBO), to selecting an optimal mixed refrigerant (MR) composition and studying the effect of each refrigerant on the performance of the H2 liquefaction process. The KBO approach guides in selecting the lower and upper limit of each refrigerant based on their impact inside heat exchangers. This study is of great importance for developing an energy-efficient and cost-effective initial design for the H2 liquefaction process.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Aqsa Ayub, Syed Fahad Ali Shah, Muhammad Abdul Qyyum, Dur-e-Yab Habib, Malik Ashir Murtaza, Mohammad Rehan, Meisam Tabatabaei, Mortaza Aghbashlo, Muhammad Waqas, Abdul-Sattar Nizami
Summary: The current study investigates economically viable biomass feedstocks for bioenergy generation and their potential for export. It identifies abundant biomass resources in Pakistan, with canola oil, leather flesh wastes, and poultry fattening showing the highest income potential. Goat manure, cashew nutshell, and cotton stalk have lower income potential but are beneficial for domestic energy generation. The United States produces the most sophisticated products, while Indonesia has the lowest level of sophistication. The study has practical applications in economic, social, and environmental perspectives, and further research is needed to explore other indicators of the PSM.
FRONTIERS IN ENERGY RESEARCH
(2023)
Article
Energy & Fuels
Ali Rehman, Bo Zhang, Muhammad Abdul Qyyum, Yang Zhuqiang, Junaid Haider
Summary: Biomethane is a competitive alternative to fossil fuels, and liquefied biomethane is the most suitable form for long-distance transportation. To address the high power consumption and cost of the liquefaction process, an integrated system of liquid air energy storage (LAES) and biomethane liquefaction is proposed. The cold-exergy of liquid air aids the sub-cooling and liquefaction processes of biomethane, while the thermal exergy of a compressed mixed refrigerant aids the expansion stage of liquid air. Results from exergy analysis and sustainability index show significant improvements in energy efficiency and sustainability for the integrated LBM-LAES process.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Wahid Ali, Kinza Qadeer, Muhammad Abdul Qyyum, Mohammad Shamsuzzoha, Mohammad Obaid Qamar, Mohammad Ehtisham Khan, Moonyong Lee, Syed Kashif Ali, Abdullateef H. Bashiri, Waleed Zakri
Summary: This study proposes an improved method using hydrofluoroolefin-based single mixed refrigerant (SMR) technology to enhance energy efficiency and process reversibility in FLNG operations. With the optimization of the proposed process, significant energy and cost savings are achieved.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(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)
