Article
Energy & Fuels
R. Hussain Vali, Anh Tuan Hoang, M. Marouf Wani, Harveer Singh Pali, Dhinesh Balasubramanian, Muslum Arici, Zafar Said, Xuan Phuong Nguyen
Summary: In this study, the optimization of engine parameters and the use of ZnO nanoparticles and diesel-biodiesel emulsion were explored to improve the performance, combustion, and emissions of diesel engines. The input parameters of the engine were optimized using response surface methodology, and the experiments were carried out according to a Central Composite Rotating Design matrix. The optimized engine responses showed improved brake thermal efficiency, specific energy consumption, emissions levels, in-cylinder pressure, and heat release rate.
Article
Energy & Fuels
M. Suresh, C. P. Jawahar, R. Rohith Renish, A. Malmquist
Summary: The study focuses on the production, emission, and performance characteristics of Argemone Mexicana oil methyl ester and diesel blends at variable compression ratios (CRs). Results show that AME20 blend at CR17 outperforms diesel and other blends in terms of brake thermal efficiency, brake power, and specific fuel consumption.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Chemistry, Physical
Muhammad Bilal Khan, Ali Hussain Kazim, Muhammad Farooq, Khalid Javed, Aqsa Shabbir, Rehan Zahid, Sadaf Fatima, Muhammad Rohail Danish, Qasim Ali, Ijaz Ahmad Chaudhry, A. E. Atabani
Summary: The study analyzed the effects of HHO gas, biodiesel, and their combination in a diesel engine. It found that biodiesel blends significantly improve thermal efficiency and reduce fuel consumption, while the addition of HHO gas enhances torque and power.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Ajay Vardhan, R. S. Rajput, A. C. Tiwari, Ravindra Randa
Summary: This study analyzes the working and emission performance of a modified single-cylinder diesel engine operating on a dual fuel mode without pilot fuel. The results show that liquefied petroleum gas (LPG) fuel achieves better brake thermal efficiency and lower emissions compared to petrol and diesel fuels.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Engineering, Environmental
K. Shojae, M. Mandavian, B. Khoshandam, Hassan Karimi-Maleh
Summary: The study numerically evaluated three different biodiesel fuels and found significant effects of changing engine parameters on performance. Additionally, it was observed that high viscosity biodiesel results in lower combustion efficiency, while fuels with higher oxygen atom content produce more NO emissions.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Chemical
R. Rohith Renish, Amala Justus Selvam, Robert Cep, Muniyandy Elangovan
Summary: The investigation demonstrates that sea mango biodiesel blends could be used as a diesel alternative at CR 18:1 without any engine modifications, leading to improved engine performance, emissions, and combustion characteristics.
Article
Green & Sustainable Science & Technology
Srinidhi Campli, Madhusudhan Acharya, Shylesh V. Channapattana, Abhay A. Pawar, Shivaji V. Gawali, Jitendra Hole
Summary: The study found that adding 75 ppm of NiO to neem biodiesel-diesel blend can reduce thermal NO(x) emissions, improve engine performance, and decrease harmful emissions.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2021)
Article
Energy & Fuels
Akshay Jain, Bhaskor Jyoti Bora, Rakesh Kumar, Prabhakar Sharma, Bhaskar Jyoti Medhi, Gottipati Venkata Rambabu, Balakrishnan Deepanraj
Summary: The study explores the possibility of improving the performance of a Mesua Ferrea seed oil biodiesel run diesel engine by operating at different injection timings and load settings. The results show that retarding the injection timing at 20° bTDC improves fuel conversion efficiency, reduces exergy destruction, and lowers emissions. At injection timing of 20° bTDC for 100% load, the brake thermal efficiencies were found to be 26.11% and 27.76%, respectively, under biodiesel and diesel mode.
Article
Energy & Fuels
B. Karpanai Selvan, Soni Das, M. Chandrasekar, R. Girija, S. John Vennison, N. Jaya, P. Saravanan, M. Rajasimman, Yasser Vasseghian, N. Rajamohan
Summary: The study investigates the performance and emission characteristics of various biomass blends in a diesel engine. The results show that the AO10D blend performs well with higher thermal efficiency and lower emissions at 50% load.
Article
Green & Sustainable Science & Technology
Sakthivel Rajamohan, Sidharth Suresh, Shanthinath Mallinathan, Abbhijith Harigopal, Van Nhanh Nguyen, Dirk Engel, Shams Forruque Ahmed, Tri Hieu Le
Summary: This study elaborates on the potential use of cottonseed as a renewable source for producing bio-fuel. It includes two stages: the extraction of bio-oil from cottonseed through pyrolysis, and the analysis of engine performance and emission characteristics using blends of bio-oil/diesel fuel. The study demonstrates that the optimized parameters for the engine operation can result in improved performance and emission characteristics.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Pali Rosha, Sandeep Kumar, P. Senthil Kumar, C. N. Kowthaman, Saroj Kumar Mohapatra, Amit Dhir
Summary: The experimental study investigated the effects of using hydrogen-enriched biogas and diesel in a compression ignition engine at variable compression ratios. Results showed that utilizing hydrogen-enriched biogas at a higher compression ratio significantly improved engine performance and reduced emissions.
Article
Engineering, Environmental
M. S. Gad, A. S. El-Shafay, H. M. Abu Hashish
Summary: The study investigates the use of non-edible oils as alternative fuels, with the screw press extraction method showing higher oil yield and improved properties. Blending biodiesel with diesel oil at different ratios resulted in varying effects on engine performance and emissions.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Green & Sustainable Science & Technology
H. S. Anantha Padmanabha, Dillip Kumar Mohanty
Summary: The study examines the use of ethylene glycol diacetate as an oxygenated additive in blended biodiesel to enhance the performance of a diesel engine. The experiments were carried out on a diesel engine with variable compression ratio, using biodiesel blends containing 10-30% Jatropha and karanja oil methyl ester, and 1-3% additive. The results showed that adding 3% additive improved the brake thermal efficiency by 3.6-4.2% and reduced the brake specific fuel consumption by 0.08-0.24 kg/kWh. The emissions of hydrocarbons and carbon monoxide decreased, while nitrogen oxide slightly increased. The study concludes that ethylene glycol diacetate can be used as a suitable additive in blended biodiesel to improve the performance of diesel engines.
Article
Engineering, Mechanical
R. Tamilselvan, S. Periyasamy
Summary: This study experimentally investigates the impact of dual biofuel blends with diesel fuel at different compression ratios on a combustion ignition engine. The results show that the engine performance characteristics improved with a B20 biofuel blend at a compression ratio of 18.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Chemical
Weigang Yu, Zhiqing Zhang, Bo Liu
Summary: An improved heat transfer model was developed in AVL-BOOST to enhance the efficiency of a diesel engine fueled with biodiesel, incorporating a five-component biodiesel skeletal mechanism. The model accurately predicted the engine's performance characteristics, with errors less than 2% between experiment and simulation. The nozzle diameter, injection pressure, and injection advance angle were found to be significant factors in the injection system, highlighting the need to choose the injection rate reasonably.
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.