Article
Agricultural Engineering
Jingbo Qu, Yong Sun, Yuyingnan Liu, Changyu Liu, Guoxiang Zheng, Zhongjiang Wang, Bin Qu
Summary: The study found that the direct absorption biogas digester can effectively utilize solar energy to promote anaerobic fermentation of microorganisms, and a numerical model was established to investigate the mechanism of photo biochemical transformation. Adjusting the effects of backward and forward scattering of particles can improve the regenerative performance and biogas production of the digester.
BIORESOURCE TECHNOLOGY
(2021)
Article
Thermodynamics
Changyu Liu, Yongxiang Sun, Ji Bian, Wanyu Hu, Chengjun Zhang, Yangyang Wu, Pengfei Li, Dong Li
Summary: A new coupling model of flow heat transfer and anaerobic fermentation is established to enhance anaerobic treatment equipment efficiency and protect the environment. The model reduces the difference between true and predicted data. Using this model, the effect of baffles on temperature field and gas production efficiency in a push-flow anaerobic reactor is studied. Results show that increasing baffles improves temperature uniformity and gas production rate.
Article
Energy & Fuels
Changyu Liu, Yongxiang Sun, Dong Li, Ji Bian, Yangyang Wu, Pengfei Li, Yong Sun
Summary: By optimizing the design of direct absorption methane reactor with the use of paraffin phase change material (PCM), the thermal insulation and storage performance of the reactor can be improved, leading to enhanced stability of the fermentation process and gas production efficiency.
Review
Biotechnology & Applied Microbiology
Sheetal Kishor Parakh, Zinong Tian, Jonathan Zhi En Wong, Yen Wah Tong
Summary: Concerns about energy demand, fossil fuel depletion, and global warming have led to increased interest in developing renewable energy sources, including microalgae biomass. This review provides an overview of biochemical conversion processes for transforming microalgae biomass into bioenergy products. Biomethane production from anaerobic digestion and bioethanol production from traditional fermentation are identified as promising methods, but challenges such as high production costs and low energy recovery efficiency need to be addressed for commercialization. Future research should focus on reducing costs, developing integrated biorefinery approaches, and utilizing artificial intelligence tools for optimization and scale-up.
FERMENTATION-BASEL
(2023)
Article
Biotechnology & Applied Microbiology
Hind Barghash, Kenneth E. Okedu, Aisha Al Balushi
Summary: This study focused on hydrogen gas production through biological processes using landfill leachate as a substrate, with pH and temperature control. Analysis showed that the maximum yield of hydrogen produced was 5,754 ml H-2/L.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Yanlong Zhu, Suning Li, Jianhua Fan, Weiqiang Kong, Yuan Yuan, Heping Tan
Summary: In this study, a novel model of photothermal conversion in a direct absorption solar collector was built using the Monte Carlo and finite volume methods. The study compared the temperatures of the novel and traditional solar collectors and investigated the sensitivity of the parameters to radiative heat loss. The study also discussed the radiative heat transfer characteristics using the radiative exchange factor. The results validated the advantages of the novel solar collector and provided insights for solving the low efficiency and thermal damage issues in traditional solar collectors at high temperatures.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Food Science & Technology
Silvia Juliana Martinez, Ana Paula Pereira Bressani, Joao Batista Pavesi Simao, Victor Satler Pylro, Disney Ribeiro Dias, Rosane Freitas Schwan
Summary: Altitude changes affect the composition of coffee fruits and beans, as well as the microbial community structure and biochemical characteristics associated with them. High altitude coffees are more inclined towards alcohols, aldehydes, and esters, while low altitude coffees are more inclined towards phenolic compounds.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Thermodynamics
Mahyar Ashouri, Majid Bahrami
Summary: This study proposes two analytical solutions for membrane-based absorbers and validates the models' accuracy through comparison with experimental data. The study also conducts a comprehensive investigation on the effect of operating conditions and membrane physical properties on absorption rate.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Agricultural Engineering
Lei Zhao, Zihan Wang, Hong-Yu Ren, Chuan Chen, Jun Nan, Guang-Li Cao, Shan-Shan Yang, Nan-Qi Ren
Summary: In this study, an innovative approach using RCA-biochar derived from residue cornstalk was proposed to enhance direct bio-hydrogen production. The addition of RCA-biochar increased bio-hydrogen production potential and maximum production rate, mainly due to providing more specific surface area for hydrogen-producing bacteria attachment and promoting cellulolytic enzyme activity. These findings may support effective and sustainable lignocellulosic bio-hydrogen production in the future.
BIORESOURCE TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Leonor Sillero, Rosario Solera, Montserrat Perez
Summary: A two-stage anaerobic co-digestion system was proposed to produce biohydrogen and biomethane. The research evaluated the biochemical hydrogen potentials (BHP) at different temperatures and their effect on subsequent biochemical methane potentials. Poultry manure was added to the mixture of sewage sludge and wine vinasse. The results showed that a thermophilic temperature of 55 degrees C with the addition of poultry manure generated the highest biohydrogen yield. The effluent from the hyperthermophilic BHP trials at 70 degrees C had a higher methane yield, and the sewage sludge and vinasse mixture had the highest percentage of VS removal.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Wenyan Zhao, Binghua Yan, Zhiyong Jason Ren, Shanquan Wang, Yang Zhang, Heqing Jiang
Summary: In this study, a carbon loop strategy was developed to regulate the fermentation micro-environment, leading to selective butyric acid production from organic waste. The integration of the ion substitution electrodialysis-anaerobic membrane bioreactor (ISED-AnMBR) system achieved a high butyric acid production with a mass fraction of 76.05%. The carbon recovery reached 96.09% with the assistance of ISED. The microbial community structure analysis revealed the dominance of Clostridia and the emergence of chain elongators had a significant impact on butyric acid production. This work provides a new approach for the valorization of organic waste and contributes to the circular economy.
Article
Engineering, Environmental
Guang Yang, Jianlong Wang
Summary: The combination of gamma radiation and nano zero-valent iron was used for the first time to improve the performance of AFR biohydrogen fermentation, effectively removing residual antibiotics and increasing hydrogen yield with enhanced bioavailability of organic matters.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Ling-Ling Zheng, Jun Zhang, Xiao-Zhen Liu, Lei Tian, Zhen-Sheng Xiong, Xin Xiong, Peng Chen, Dai-She Wu, Jian-Ping Zou
Summary: This study proposes a new approach for the treatment of pesticide wastewater, involving acidic-alkaline ozonation and anaerobic biological reactions for degradation and resource recovery.
Article
Thermodynamics
Hongsheng Zhang, Xingang Liu, Yifeng Liu, Chenghong Duan, Zhan Dou, Jiyun Qin
Summary: The novel cogeneration system proposed in the paper effectively increases power generation and heating load, reduces standard coal consumption rate and total exergy loss, and improves total energy and exergy efficiency.
Article
Green & Sustainable Science & Technology
Xiaomin Wang, Yufen Wang, Lixin Tian, Kaixin Zheng, Tingting Zhu, Xueming Chen, Yingxin Zhao, Yiwen Liu
Summary: This study presents an innovative strategy for short-chain fatty acids (SCFAs) production from anaerobic waste activated sludge (WAS) fermentation using heat assisted potassium ferrate (PF) pretreatment. The pretreatment enhances the disintegration of sludge, releasing organic compounds and improving their biodegradability. It also promotes the bioactivity of key enzymes involved in SCFAs accumulation and leads to a shift in microbial community structure towards SCFAs-producing bacteria.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Thermodynamics
Pengcheng Zhao, Jingang Wang, Liming Sun, Yun Li, Haiting Xia, Wei He
Summary: The production of green hydrogen through water electrolysis is crucial for renewable energy utilization and decarbonization. This research explores the optimal electrode configuration and system design of compactly-assembled industrial electrolyzer. The findings provide valuable insights for industrial application of water electrolysis equipment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
V. Baiju, P. Abhishek, S. Harikrishnan
Summary: Thermally driven adsorption desalination systems (ADS) have gained attention as an eco-friendly solution for water scarcity. However, they face challenges related to low water productivity and scalability. To overcome these challenges, integrating ADS with other desalination technologies can create a small-scale hybrid system. This study proposes integrating ADS with a Thermo Electric Dehumidification (TED) unit to enhance its performance.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
C. X. He, Y. H. Liu, X. Y. Huang, S. B. Wan, Q. Chen, J. Sun, T. S. Zhao
Summary: A decentralized centroid multi-path RC network model is constructed to improve the temperature prediction accuracy compared to traditional RC models. By incorporating multiple heat flow paths and decentralizing thermal capacity, a more accurate prediction is achieved.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chaoying Li, Meng Wang, Nana Li, Di Gu, Chao Yan, Dandan Yuan, Hong Jiang, Baohui Wang, Xirui Wang
Summary: There is an urgent need to shift away from heavy dependence on fossil fuels and embrace renewable energy sources, particularly in the energy-intensive oil refining process. This study presents an innovative concept called the Solar Oil Refinery, which applies solar energy in oil refining. A solar multi-energies-driven hybrid chemical oil refining system that utilizes solar pyrolysis and electrolysis has been developed, significantly improving solar utilization efficiency, cracking rate, and hydrogen yield.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chao Ma, Guanghui Wang, Dingbiao Wang, Xu Peng, Yushen Yang, Xinxin Liu, Chongrui Yang, Jiaheng Chen
Summary: This study proposes a bio-inspired fish-tail wind rotor to improve the wind power efficiency of the traditional Savonius rotor. Through transient simulations and orthogonal experiments, the key factors affecting the performance are identified. A response surface model is constructed to optimize the power coefficient, resulting in an improvement of 9.4% and 6.6% compared to the Savonius rotor.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sina Bahmanziari, Abbas-Ali Zamani
Summary: This paper proposes a new framework for improving electrical energy harvesting from piezoelectric smart tiles through a combination of magnetic plucking, mechanical impact, and mechanical vibration force mechanisms. Experimental results demonstrate a significant increase in energy yield and average energy harvesting time compared to other mechanisms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Nanjiang Dong, Tao Zhang, Rui Wang
Summary: This study establishes a multiobjective mixed-variable configuration optimization model for a comprehensive combined cooling, heating, and power energy system, and proposes an efficient generating operator to optimize this model. The experimental results show that the proposed algorithm performs better than other state-of-the-art algorithms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Ahmed E. Mansy, Eman A. El Desouky, Tarek H. Taha, M. A. Abu-Saied, Hamada El-Gendi, Ranya A. Amer, Zhen-Yu Tian
Summary: This study aims to convert office paper waste into bioethanol through a sustainable pathway. The results show that physiochemical and enzymatic hydrolysis of the waste can yield a high glucose concentration. The optimal conditions were determined using the Box-Behnken design, and a blended membrane was used for ethanol purification.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sven Klute, Marcus Budt, Mathias van Beek, Christian Doetsch
Summary: Heat pumps are crucial for decarbonizing heat supply, and steam generating heat pumps have the potential to decarbonize the industrial sector. This paper presents the current state, technical and economic data, and modeling principles of steam generating heat pumps.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Le Zhang, To-Hung Tsui, Yen Wah Tong, Pruk Aggarangsi, Ronghou Liu
Summary: This study investigates the effectiveness of a current-carrying-coil-based magnetic field in promoting anaerobic digestion of chicken manure. The results show that the applied magnetic field increases methane yield, decreases carbon dioxide production, and reduces the concentration of ammonia nitrogen. Microbial community analysis reveals the enrichment of certain methanogenic genera and enhanced metabolic pathways. Pilot-scale experiments confirm the technical effectiveness of the magnetic field assistance in enhancing anaerobic digestion of chicken manure.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Bo Chen, Ruiqing Ma, Yang Zhou, Rui Ma, Wentao Jiang, Fan Yang
Summary: This paper presents an advanced energy management strategy for fuel cell hybrid electric heavy-duty vehicles, focusing on speed planning and energy allocation. By utilizing predictive co-optimization control, this strategy ensures safe inter-vehicle distance and minimizes energy demand. Simulation results demonstrate the effectiveness of the proposed method in reducing fuel cell degradation cost and overall operation cost.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Fabio Fatigati, Roberto Cipollone
Summary: Organic Rankine Cycle-based microcogeneration systems that use solar sources to generate electricity and hot water can help reduce CO2 emissions in residential energy-intensive sectors. The adoption of a recuperative heat exchanger in these systems improves efficiency, reduces thermal power requirements, and saves on electricity costs.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Lipeng He, Renwen Liu, Xuejin Liu, Xiaotian Zheng, Limin Zhang, Jieqiong Lin
Summary: This research proposes a piezoelectric-electromagnetic hybrid energy harvester (PEHEH) for low-frequency wave motion and self-sensing wave environment monitoring. The PEHEH shows promising power output and the ability to self-power and self-sense the wave environment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Shangling Chu, Yang Liu, Zipeng Xu, Heng Zhang, Haiping Chen, Dan Gao
Summary: This paper studies a distributed energy system integrated with solar and natural gas, analyzes the impact of different parameters on its energy utilization and emissions reduction, and obtains the optimal solution through an optimization algorithm. The results show that compared to traditional separation production systems, this integrated system achieves higher energy utilization and greater reduction in carbon emissions.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Qingpu Li, Yaqi Ding, Guangming Chen, Yongmei Xuan, Neng Gao, Nian Li, Xinyue Hao
Summary: This paper proposes and studies a piston-type thermally-driven pump with a structure similar to a linear compressor, aiming to eliminate the high-quality energy consumption of existing pumps and replace mechanical pumps. The coupling mechanism of working fluid flow and element dimension is analyzed based on force analysis, and experimental data analysis is used to determine the pump operation stroke. Theoretical simulation is conducted to analyze the correlation mechanism of the piston assembly. The research shows that the thermally-driven pump can greatly reduce power consumption and has potential for industrial applications.
ENERGY CONVERSION AND MANAGEMENT
(2024)