Article
Thermodynamics
Panayiotis K. Ktistis, Rafaela A. Agathokleous, Soteris A. Kalogirou
Summary: This study introduces the first industrial PTC system in Cyprus, which is able to produce steam for the industrial sector and improve fuel efficiency.
Article
Green & Sustainable Science & Technology
Arun Kumar Ramasamy, Madhu Ganesh, Suriyaprakash Senthil Kumar, Keerthivasan Rajamani
Summary: Researchers have improved the optical and thermal performance of solar thermal concentrators, particularly by adding flat plates to the parabolic mirror to create a hybrid collector called HPLFC. Optical and thermal modeling estimates that HPLFC has an average optical efficiency of 49% and overall efficiency of 39%. During winter, HPLFC has a lower efficiency than PTC but performs better than LFC.
ENERGY FOR SUSTAINABLE DEVELOPMENT
(2023)
Article
Multidisciplinary Sciences
Youssef Drira, Nadim Fakhfakh, Skander Jribi, Hatem Bentaher, Ilyes Benhassine, Lotfi Ammar
Summary: Parabolic trough collectors (PTCs) are advanced and widely used in solar concentrating systems, but their high cost and technology requirements hinder their implementation in low-income countries. This study assessed the performance of two small-scale solar thermal production units (SPLFR and PTC-SS) as alternatives to PTCs.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Tarun Kumar Aseri, Chandan Sharma, Tara C. Kandpal
Summary: The study explores ways to enhance the competitiveness of parabolic trough collector-based CSP plants by utilizing advanced materials and thermal storage technologies. By evaluating the impact of proposed changes on component requirements, the estimated reduction in capital costs for implementing these changes in India is approximately 12.3% to 29.9%.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Green & Sustainable Science & Technology
Diogo do Carmo Zidan, Cristiana Brasil Maia, Mohammad Reza Safaei
Summary: Numerical simulations were conducted to predict the performance of PTC systems operating with eight different nanofluid compositions. The model also estimated daily incident solar radiation, beneficial energy gain, overall efficiency, thermal losses, and system pressure drop.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Review
Thermodynamics
Tawfiq Chekifi, Moustafa Boukraa
Summary: This article presents a comprehensive review of the performance improvement research on parabolic trough collectors, with a focus on works using numerical methods. It outlines the possible further developments of these devices and identifies areas that need more attention and investigation.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Energy & Fuels
Qiliang Wang, Yao Yao, Zhicheng Shen, Hongxing Yang
Summary: A novel parabolic trough collector-photovoltaic (PTC-PV) system is proposed to enhance the thermal performance and solar utilization efficiency. Mathematical models are established and experiments are conducted to validate the superior performance of the hybrid PTC-PV system.
Article
Thermodynamics
Xiaojing Li, Pengpeng Yan, Jiangjiang Wang, Tao Yang
Summary: This study presents a numerical simulation of parabolic trough solar collector systems with different forms of vortex generators inserted in the absorber tube using [EMIM][BF4] ionic liquid. The effects of varying parameters on the thermal performance of the system are discussed. The results show that the use of vortex generators can significantly improve the thermal efficiency and exergetic efficiency of the system under certain parameters.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Gongxing Yan, Xia Zhou, Azher M. Abed, Theyab R. Alsenani, Samia Elattar, Fan Peng, Mostafa A. H. Abdelmohimen
Summary: Parabolic trough collector (PTC) generates thermal energy by concentrating solar radiation, but integration with Photovoltaic (PV) modules significantly enhances its overall output. This research optimizes the operating parameters of the PTC/PV system and investigates the effect of rotating the receiver tube and installing metal foam on system efficiency. The optimized PTC/PV system achieves a maximum overall performance of 71.1%, but rotating the receiver tube increases the overall efficiency to 82.5% at the cost of reduced PV cell efficiency. Installing metal foam boosts electrical and overall efficiency by approximately 2% and 13.9% respectively, but slightly decreases thermal efficiency by 0.5%.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Qiliang Wang, Boxu Shen, Junchao Huang, Honglun Yang, Gang Pei, Hongxing Yang
Summary: A novel parabolic trough solar receiver integrated with vanadium dioxide-based thermochromic coating was proposed to reduce radiant heat loss and improve overall performance. Comprehensive heat transfer models were established and validated for high accuracy in predicting thermal performance. The thermochromic coating showed unique advantages in improving thermal performance of the solar receivers under both M phase and R phase, resulting in reduced heat loss and improved thermal efficiency.
Review
Green & Sustainable Science & Technology
Arun Kumar Tiwari, Vijay Kumar, Zafar Said, H. K. Paliwal
Summary: The Parabolic trough collector (PTC) is the most established solar concentration technology worldwide. The study compares various researches to evaluate the effect of nanofluids on thermal parameters for PTC and suggests that using hybrid nanofluids can significantly enhance thermal properties. Metal oxide hybrid nanofluids show more promise in enhancing thermal conductivity compared to oxide ones.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Green & Sustainable Science & Technology
Alibakhsh Kasaeian, Koosha Mirjavadi, Peyman Pourmoghadam, Faezeh Asgari Sima, Yasaman Amirhaeri, Sara Borhani, Leila Fereidooni
Summary: This paper provides a detailed review of the literature on parabolic trough collectors (PTC) combined with organic Rankine cycles (ORC). It examines various aspects such as modeling and simulation, optimization, exergy, economics, and experimental studies. The review also highlights the impact of different parameters on the performance of the proposed systems.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Green & Sustainable Science & Technology
Qiliang Wang, Gang Pei, Hongxing Yang
Summary: The novel parabolic trough solar receiver with a radiation shield, based on the theory of the negative thermal-flux region, shows great potential for significant enhancement of the techno-economic performance of solar power plants, improving electrical energy production and reducing the levelized cost of energy.
Article
Green & Sustainable Science & Technology
Alireza Rafiei, Reyhaneh Loni, Shuhaimi B. Mahadzir, Gholamhassan Najafi, Milad Sadeghzadeh, Mohamed Mazlan, Mohammad Hossein Ahmadi
Summary: A hybrid energy conversion system was proposed and evaluated for power generation and freshwater production, with a focus on the influence of different nanofluids on system performance. Results showed improved thermal efficiency, freshwater production, and exergy efficiency with the application of specific nanofluids, while reducing CO2 emissions in the environment.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Thermodynamics
Ibtissem Saddouri, Oussama Rejeb, Djaffar Semmar, Abdelmajid Jemni
Summary: In this study, solar energy was converted into thermal energy using a parabolic through collector (PTC) and investigated the performance of PTC collector using hybrid nanofluids. The results showed that increasing nanoparticle concentration improved the performance of the PTC collector, and the 1.5% MWCNT/1.5% Al2O3-water hybrid nanofluid was found to be the optimal cooling fluid.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Muhammad Imran Khan, Faisal Asfand, Sami G. Al-Ghamdi
Summary: Concentrated solar power (CSP) technologies are considered as one of the most promising ways to generate electric power in the future. The integration of efficient and cost-effective thermal energy storage (TES) systems is crucial for the development of CSP technology due to the unstable and intermittent nature of solar energy availability. Over the past decade, phase change materials (PCM) have gained significant interest for CSP applications as a latent heat TES system. This comprehensive review provides an overview of the current state and future challenges of cutting-edge PCM based TES technologies for CSP application, including the functional parts and research progress in each part.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Muhammad Imran Khan, Faisal Asfand, Sami G. Al-Ghamdi
Summary: A global transition towards more sustainable production and consumption systems is underway, and the transition in energy systems is particularly noticeable. Concentrated solar power (CSP) technologies are seen as one of the most promising ways to generate electric power in the coming decades. Efforts have been made to reduce the cost of CSP technologies, and there is a need to have a comprehensive understanding of the research and technological advancements in this field.
Article
Public, Environmental & Occupational Health
Furqan Tahir, Devendra Bansal, Atiq Ur Rehman, Salah B. Ajjur, Sini Skariah, Samir B. Belhaouari, Hamad Al-Romaihi, Mohammed H. J. Al-Thani, Elmoubasher Farag, Ali A. Sultan, Sami G. Al-Ghamdi
Summary: Qatar, a peninsular country, has hot and humid weather, and 88% of its population consists of immigrants. This makes the country vulnerable to the introduction and spread of vector-borne diseases, partly due to the presence of native arthropod vectors. The changing climatic conditions are expected to make Qatar's weather even warmer. Factors like humidity and temperature play a role in the breeding and distribution of different mosquito species in the region. Without proper precautions, high rates of specific mosquito species can lead to the transmission of various vector-borne diseases. This study analyzes the environmental impact on the occurrence of mosquito species in Qatar and proposes the use of a Naive Bayes model to predict favorable environmental conditions for specific mosquito species. The findings can help in planning and implementing surveillance systems and preventive measures to control the spread of mosquitoes in Qatar.
FRONTIERS IN PUBLIC HEALTH
(2023)
Article
Green & Sustainable Science & Technology
Mohammed M. Al-Humaiqani, Sami G. Al-Ghamdi
Summary: The frequency and severity of climate change are predicted to increase, leading to more disasters, increased vulnerability in the built environment system, and decreased coping capacity. Achieving resilience in the built environment is challenging and requires collaboration among various stakeholders. This study engaged governmental authorities, regulatory bodies, engineering firms, professionals, contractors, and NGOs and NPOs through a questionnaire survey to understand their perceptions on climate change adaptation, built environment resilience qualities, and the resilience of the existing built environment. The results revealed the need for improving public understanding and management tools, reducing economic losses, and developing necessary plans.
Article
Green & Sustainable Science & Technology
Omar F. Alrawi, Sami G. Al-Ghamdi
Summary: Global warming and climate degradation have led to the adoption of renewable energy sources, especially photovoltaic systems, which can be deployed on residential rooftops. However, there are barriers to residential rooftop photovoltaic system adoption, including public acceptance, market readiness, and supportive governmental policies. This study aims to address these barriers using a combinational approach, analyzing customer acceptance, market penetration, and government policies. The research focuses on Qatar as a case study for developing the study framework.
Article
Energy & Fuels
Furqan Tahir, Sami G. Al-Ghamdi
Summary: This paper focuses on analyzing recent studies on the impact of climate change on energy consumption in the built environment. It examines and discusses accepted approaches and projections of building energy change. The survey shows that estimations of heating/cooling loads are significantly influenced by building type, city, and other regional factors. Finally, the challenges associated with predicting building energy requirements are presented and discussed.
Article
Construction & Building Technology
Ammar M. M. Khourchid, Tareq A. A. Al-Ansari, Sami G. G. Al-Ghamdi
Summary: Buildings are major contributors to climate change in hot and dry climates, and climate change is expected to increase cooling demands. This study investigates the impact of climate change on cooling demands in different building types in Qatar and evaluates related environmental impacts. The study found that the cooling demand could increase by 13-53% and 19-67% in 2071 and 2100, respectively, and buildings with higher thermal insulation and lower window-to-wall ratio are less affected. Replacing natural gas with solar power can reduce cooling energy-associated CO2 emissions by 92%.
Article
Green & Sustainable Science & Technology
Muhammad Salman Afzal, Furqan Tahir, Sami G. Al-Ghamdi
Summary: With economic and population growth, artificial island development (AID) has become popular in overcoming land limitations. However, this study focused on the environmental concerns associated with AID in Qatar's island (QI). Extensive environmental impact assessment (EIA) was conducted, covering various aspects such as meteorology, hydrodynamics, sediment quality, and biodiversity. The results showed acceptable turbidity and sediment levels during construction, and strategic measures were proposed for future developments.
CLEANER ENVIRONMENTAL SYSTEMS
(2023)
Article
Biodiversity Conservation
Salma Habib, Furqan Tahir, Fabiha Hussain, Nadine Macauley, Sami G. Al-Ghamdi
Summary: Carbon capture, storage, and sequestration play a crucial role in mitigating the adverse effects of climate change. To achieve the 2 degrees C target, it is essential to implement both artificial and natural carbon capturing techniques and utilize renewable resources. This review critically examines various natural carbon pools, methodologies, and modeling techniques for carbon accounting, providing specific recommendations and highlighting the potential benefits of natural carbon sinks. Ground and field measurements are identified as the most accurate methods, while satellite earth observation, drone, and airborne measurements show significant potential for enhancing ecosystem analysis.
ECOLOGICAL INDICATORS
(2023)
Article
Biotechnology & Applied Microbiology
Junaid Saleem, Furqan Tahir, Moghal Zubair Khalid Baig, Tareq Al-Ansari, Gordon McKay
Summary: Plastic production has significant environmental impacts, and reducing production and finding sustainable alternatives is crucial. Recycling plastic waste can help mitigate these impacts but requires careful assessment. This study evaluates the environmental impact of producing polymer pellets from recycled plastic waste and highlights the importance of sustainable techniques in mitigating plastic waste effects.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Construction & Building Technology
Mohammad Zaher Serdar, Sami G. G. Al-Ghamdi
Summary: This research proposes a new framework for evaluating the performance of flooded road networks during the recovery stage. A Recovery Resilience Index (RRI) is calculated using the resilience index and metrics, and a sensitivity analysis is conducted for consistent results. Three post-flood interventions were evaluated, with the critical-links-first strategy being the most effective and flood-susceptibility-based strategy being the least effective. This framework provides options for recovery planning and resource allocation, and recommendations for future mega events.
FRONTIERS IN BUILT ENVIRONMENT
(2023)
Article
Chemistry, Physical
Muhammad Imran Khan, Sami G. Al-Ghamdi
Summary: The serious threat of climate change has prompted GCC countries to aggressively seek clean energy sources. Recently, these countries have announced carbon emission targets, with some aiming for net-zero emissions by 2050 or 2060. Governments and energy companies around the world are betting on hydrogen to lower emissions. However, there are obstacles to the adoption of a green hydrogen economy in Gulf countries, including high production costs, infrastructure and transportation issues, regulation, and demand. This study analyzes the obstacles and future prospects of hydrogen economy in the GCC region using SWOT analysis, concluding that while GCC countries have the potential to lead in hydrogen, they need to take risks to compete globally, and the growth of the hydrogen economy depends on external factors beyond their control.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Furqan Tahir, Binash Imteyaz, Muhammad Yasir, Sami G. Al-Ghamdi
Summary: Among carbon capture technologies, oxy-fuel combustion is more competitive, but obtaining pure oxygen is costly. Ion transport membranes have improved energy efficiency, but the current membranes have low oxygen permeation flux. This study investigates oxy-methane combustion in a vertical porous plate reactor to improve reactor design for oxygen transport membrane reactor applications.
Article
Engineering, Chemical
Arvin Sohrabi, Mousa Meratizaman, Shuli Liu
Summary: This paper simulates and discusses possible solutions to improve the economic and technical performances of a battery-less renewable energy-powered BWRO system under real climate conditions. The study finds that the photovoltaic-based system performs better in terms of specific energy consumption and unused energy ratio.
Article
Engineering, Chemical
Chunlan Pan, Xiaoyin Hu, Vishal Goyal, Theyab R. Alsenani, Salem Alkhalaf, Tamim Alkhalifah, Fahad Alturise, Hamad Almujibah, H. Elhosiny Ali
Summary: This paper introduces a novel waste heat recovery method using the hot flue gas from a ship's engine to produce liquefied hydrogen while meeting the ship's air-conditioning requirement. A comprehensive feasibility assessment is conducted and an artificial neural network with a multiobjective grey wolf optimization method is used for optimization. The findings indicate the highest mean sensitivity index of the flash temperature and the best optimization scenario for exergy efficiency, CO2 emission reduction, and liquefied hydrogen cost.
Article
Engineering, Chemical
Daniele Chinello, Jan Post, Louis C. P. M. de Smet
Summary: In this study, PVDF-based anion-exchange membranes were designed to selectively separate nitrate from chloride. Experimental data showed that increasing the concentration of PVDF enhanced nitrate transport but also increased the membrane electrical resistance. The selectivity of nitrate was found to be independent of the membrane thickness and mainly driven by the increased affinity between the anion and the membrane.
Article
Engineering, Chemical
Umar Noor, Muhammad Fayyaz Farid, Ammara Sharif, Amna Saleem, Zubair Nabi, Muhammad Furqan Mughal, Kiran Abbas, Toheed Ahmed
Summary: Global water scarcity is increasing, and water desalination is an important solution. Multifunctional advanced materials, such as membrane materials and solar-driven desalination, play a crucial role in water desalination. Additionally, these materials can be used for water purification, wastewater treatment, and pollutant elimination.
Article
Engineering, Chemical
Emrah Gumus
Summary: With growing global concerns about climate change and environmental impacts, the use of nuclear energy in naval vessels offers a cleaner and more efficient solution to reduce emissions and address water and energy supply challenges. This study explores a novel system that combines a nuclear-driven supercritical carbon dioxide power cycle with reverse osmosis cogeneration to meet the water and electricity demands in maritime operations, enhancing the sustainability, efficiency, and self-sufficiency of naval vessels. The results indicate that the system has the potential to be a viable and effective solution for naval operations.
Article
Engineering, Chemical
Dao Thi Thanh Huyen, Saikat Sinha Ray, Young -Nam Kwon
Summary: This study focuses on the modification of a commercially available polyamide thin-film composite membrane with a zwitterionic material to enhance its fouling resistance. The modified membrane shows improved salt rejection and reduced permeability compared to the pristine membrane. Fouling tests demonstrate that the modified membrane has a lower fouling ratio and higher recovery ratio. The enhanced antifouling characteristics are attributed to the improved hydrophilicity resulting from the zwitterionic brushes and the salting-in effect.
Article
Engineering, Chemical
Niklas Koeller, Lukas Mankertz, Selina Finger, Christian J. Linnartz, Matthias Wessling
Summary: This study presents a methodology to scale up Flow-electrode Capacitive Deionization (FCDI) technology from lab-scale to pilot-scale systems. By increasing membrane area and using a stacking approach, the FCDI modules were successfully scaled up and achieved a salt transfer rate comparable to lab-scale systems. This provides a foundation for future assessments of energy demand and economics.
Article
Engineering, Chemical
Mona Gulied, Sifani Zavahir, Tasneem Elmakki, Hyunwoong Park, Guillermo Hijos Gago, Ho Kyong Shon, Dong Suk Han
Summary: This study introduces a novel hybrid system that combines direct contact membrane distillation (DCMD) and electrically switched ion exchange (ESIX) to facilitate seawater reverse osmosis (SWRO) brine enrichment and selective lithium recovery.
Article
Engineering, Chemical
Zhiqiang Zhang, Ruifeng Deng, Jiao Zhang, Lu She, Guangfeng Wei, Renyong Jia, Pengyu Xiang, Siqing Xia
Summary: A transmembrane electro-chemisorption system with authigenic acid and base was developed for enhancing ammonia recovery from strong ammonia wastewater. The system efficiently transformed ammonium into free ammonia, which was then adsorbed and recovered through transmembrane chemisorption. This system yielded pure (NH4)2SO4 product and produced valuable byproducts of pure hydrogen and oxygen. Higher applied voltage resulted in better ammonia recovery.
Article
Engineering, Chemical
Alena Popova, Sandrine Boivin, Takuji Shintani, Takahiro Fujioka
Summary: This study aimed to produce a high-integrity RO membrane by forming a polyamide skin layer on a TE support layer, in order to enhance the integrity of the membrane and improve the microbiological safety of potable water reuse.
Article
Engineering, Chemical
Sanjana Yagnambhatt, Saber Khanmohammadi, Jonathan Maisonneuve
Summary: This study investigates the concept of using heat to enhance reverse osmosis (RO) desalination. The effect of temperature on water permeate flux, specific energy, permeate quality, and applied operating pressures is evaluated using an analytical model. The results suggest that under specific conditions, the tradeoff between savings in mechanical pump work and thermal energy input in thermally-enhanced RO can be favorable, leading to overall energy savings.
Article
Engineering, Chemical
Jiangju Si, Chenrui Xue, Shun Li, Linchao Yang, Weiwei Li, Jie Yang, Jihong Lan, Ningbo Sun
Summary: To meet the huge demand for lithium resources, there is an urgent need to develop a new efficient technology for lithium recovery from salt-lake brines. In this study, a selective membrane capacitive deionization system is reported, which achieves high lithium recovery capacity and rate through the use of materials with efficient intercalated pseudo-capacitance and a high specific area porous carbon. The use of a modified thin-coated membrane allows for selective Li+ recovery, and adjusting the concentrations of Li+ and Mg2+ in the feed solution enables higher Li+/Mg2+ selectivity.
Article
Engineering, Chemical
Mohamed R. Salem, R. Y. Sakr, Ghazy M. R. Assassa, Omar A. Aly
Summary: This research proposes a new method of using wasted thermal energies as an additional heating source for solar still distillation units (SSDUs) to increase productivity and reduce pollution and global warming. By testing two SSDUs, the study shows that heating airflow can raise temperatures, enhance freshwater production, and improve system thermal efficiency.
Article
Engineering, Chemical
Qimeng Sun, Miao Sun, Linyan Yang, Yuan Gao, Xinghai Zhou, Lihua Lyu, Chunyan Wei
Summary: This study presents an innovative design and fabrication of a fabric-based conical roll (FCR) evaporator, which enables low-temperature evaporation and achieves high evaporation efficiency with excellent thermal management ability. The evaporator has demonstrated advanced light-harvesting capability and can produce freshwater that meets drinking water standards, showing great potential for applications in desalination and sewage treatment.
Article
Engineering, Chemical
Yidong Zhang, Wangfang Deng, Meiyan Wu, Chao Liu, Guang Yu, Qiu Cui, Pedram Fatehi, Chunlin Xu, Bin Li
Summary: In this study, a novel polydopamine-functionalized lignin-containing pulp foam evaporator with high-efficiency desalination and multi-contaminant adsorption capabilities was designed. The foam evaporator showed excellent light absorption, water absorption, thermal conductivity, and chelation abilities, allowing for solar evaporation and contaminant adsorption synergistically. It also exhibited potential applications in metal ion concentration and contaminated seawater treatments, and demonstrated superior biodegradability compared to poly-styrene foam. This foam material holds promise for developing multifunctional photo-thermal systems for solar-driven water purification.