Article
Green & Sustainable Science & Technology
Haibin Wei, Dong Yang, Jinhui Du, Xin Guo
Summary: The earth-to-air heat exchanger (EAHE) technology can significantly reduce building energy consumption. In hot-summer and cold-winter regions, EAHE can effectively lower outdoor air temperature and humidity, improve performance coefficients, and reduce building cooling and heating loads.
Article
Energy & Fuels
Aldona Skotnicka-Siepsiak
Summary: The real-world performance of a ground-to-air heat exchanger (GAHE) in the Polish climate was analyzed in this study and compared with a Typical Meteorological Year. The aim was to assess its energy-efficiency potential in different ventilation scenarios and compare energy consumption. The results can be used to guide the selection of HVAC system scenarios for engineering projects and private investors.
Article
Environmental Sciences
Hamidreza Abediasl, Navid Balazadeh Meresht, Hossein Alizadeh, Mahdi Shahbakhti, Charles Robert Koch, Vahid Hosseini
Summary: Cold climate has a negative impact on vehicle emissions and energy consumption, particularly in low temperatures where after-treatment systems and batteries may not perform optimally. Battery electric vehicles may experience a range reduction of less than 60% at an ambient temperature of 15 degrees Celsius, while conventional fuel vehicles may witness significant increases in emissions.
Article
Thermodynamics
Shiquan Wang, Wenzhe Wei, Jingsi Xie, Wei Wang, Yuying Sun, Zhaoyang Li, Yao Lin, Chengyang Huang, Shiming Deng
Summary: Due to the unreasonable defrosting initiating method of air source heat pumps (ASHPs), mal-defrost occurs frequently, leading to increased building heating energy consumption. This study proposes a control strategy based on image gray recognition to improve the defrosting initiating method of ASHPs. Experimental results show that this strategy is feasible and practical, significantly improving defrosting accuracy and energy efficiency compared to conventional methods.
APPLIED THERMAL ENGINEERING
(2024)
Review
Green & Sustainable Science & Technology
H. Y. Bai, P. Liu, M. Justo Alonso, H. M. Mathisen
Summary: This study reviewed the application of heat recovery technologies in residential buildings in cold climates, with a focus on their impact on energy efficiency and indoor air quality. The study compared different technologies and frosting control strategies, and addressed the effects of heat recovery on indoor air quality. The results provide important guidance for future research and application in improving energy efficiency and indoor air quality in residential buildings.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Green & Sustainable Science & Technology
Lee Sangwook, Chung Yoong, Jeong Yeonwoo, Kim Min Soo
Summary: In this study, a heat pump system with air-to-air regenerative heat exchanger (ARHX) is proposed to improve the energy inefficiency in the ventilation or dehumidification process for electric vehicles (EVs) in cold regions. The results show that the suggested heat pump system significantly reduces heating load and dehumidification load, as well as saves power consumption of the compressor under different climate conditions.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Construction & Building Technology
Tao Hai, S. Mohammad Sajadi, Jasni Mohamad Zain, A. S. El-Shafay, Mohsen Sharifpur
Summary: This study numerically analyzes an air conditioning system in a building using phase change materials. The focus is on reducing extra heat entering the building by studying the PCM discharging process at night. The results show that increasing tube diameter enhances PCM freezing time, while increasing Re value reduces freezing time.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Thermodynamics
Md Sazan Rahman, Jingjing Han, Gaoming Ge, Md Shamim Ahamed, Huiqing Guo
Summary: Selecting the best dehumidifier for greenhouse growers is challenging due to high costs, emerging technologies, and variations in crop species, weather climate, and greenhouse sizes. This study compared the field performance of a newly developed state point liquid desiccant dehumidifier with two other commercial dehumidification technologies in ornamental and tomato greenhouses. The results showed that no single dehumidification technique was both technically effective and cost-saving year-round, highlighting the importance of combining low-cost technologies with internal dehumidification technology in cold regions.
APPLIED THERMAL ENGINEERING
(2023)
Article
Environmental Sciences
Younghun Kim, Dongho Shin, Kee-Jung Hong, Gunhee Lee, Sang Bok Kim, Inyong Park, Bangwoo Han, Jungho Hwang
Summary: This study established a theoretical model to estimate the performance of various indoor air quality management methods for controlling indoor PM2.5 concentrations and energy consumption. The model was verified through comparative experiments. The study identified efficient energy-saving PM2.5 management scenarios using different IAQ management methods based on the annual life patterns of residents in South Korea. The results showed that energy consumption could be significantly reduced by applying natural ventilation in certain seasons and mechanical ventilation in others.
Article
Construction & Building Technology
Martin Rodriguez-Vazquez, Ivan Hernandez-Perez, Irving Hernandez-Lopez, Yvonne Chavez, Carlos M. Jimenez-Xaman, Luis A. Baltazar-Tadeo, Alfredo Aranda-Arizmendi
Summary: This study focused on using Earth-to-Air Heat Exchanger (EAHE) to refurbish social interest buildings in representative dry climatic conditions of Mexico. The influence of EAHE on indoor conditions was analyzed using computational fluid dynamics (CFD) and building energy simulation (BES). The results showed that EAHE can reduce indoor air temperature by 1.7-3.2 degrees C on warm days and increase it by 1.0-1.9 degrees C on cold days. Additionally, daily cooling load was reduced by 2-6% and daily heating load by 0.3-11% with the use of EAHE.
Article
Environmental Sciences
Hamed Sady, Saman Rashidi, Roohollah Rafee
Summary: Trombe wall is an important passive strategy for reducing energy consumption in buildings and promoting sustainable development in the residential sector. This study evaluates the energy management of Trombe walls in a residential building in the Binalood region with a cold and dry climate. Four different designs of Trombe walls are considered and installed on the southern walls of the building. The results show that the optimal design with a thicker storage wall, trapezoidal structure, and three-sided glass leads to the greatest decrease in heating load and has the most significant effect in increasing indoor air temperature.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Hamed Sady, Saman Rashidi, Roohollah Rafee
Summary: Trombe wall is an important passive strategy for reducing energy consumption and promoting sustainable development in the residential sector. This study evaluates the effectiveness of different designs of Trombe walls in a cold and dry climate, and finds that the design with thicker storage wall, trapezoidal structure, and three-sided glass has the greatest impact in reducing heating load and increasing indoor air temperature.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Thermodynamics
Hye-Jin Cho, Seong-Yong Cheon, Jae-Weon Jeong
Summary: This study proposes a hollow fiber membrane-based dual-core ventilation system to reduce space heating and cooling energy requirements. Simple prediction models were developed to evaluate the seasonal latent heat exchange performances of the system. Experimental sets were designed based on five operating parameters, and the derived models showed high accuracy. Empirical correlations for predicting latent and sensible effectiveness were derived, and a sensitivity analysis of each operating parameter was performed. Guidelines for applying the models in building energy simulation were presented. The proposed ventilation system achieved significant energy savings and reduced ventilation load in both summer and winter.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Jiaxiang Chen, Luwei Yang, Baolin An, Jianying Hu, Junjie Wang
Summary: This study investigates the impact of liquid phase working mediums on cold energy storage in a liquid air energy storage system. It is found that the temperature gradient gradually decreases in the static process, requiring reestablishment of a steady gradient. Two methods to reduce the unsteady effect are proposed and optimal operation parameters are obtained.
Article
Thermodynamics
Peng Liu, Hans Martin Mathisen, Maria Justo Alonso, Anneli Halfvardsson
Summary: Membrane energy exchangers play an increasingly important role in energy-efficient building and providing satisfactory indoor environments. This study aimed to establish a framework for the multi-objective optimization design of membrane energy exchanger performance and demonstrated its application by considering competing objectives such as maximizing thermal recovery effectiveness and minimizing pressure drop. The optimization results showed a significant reduction in pressure drop while maintaining the thermal recovery effectiveness, enabling the application of membrane energy exchangers in natural and hybrid ventilation systems.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
Miklos Kassai, Laszlo Kajtar, Jozsef Nyers
Article
Thermodynamics
Ahmed H. Abdel-Salam, Carey J. Simonson
SCIENCE AND TECHNOLOGY FOR THE BUILT ENVIRONMENT
(2020)
Article
Thermodynamics
Adesola Oluwasijibomi Olufade, Carey James Simonson
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Chemistry, Multidisciplinary
Abdalla H. Karoyo, Leila Dehabadi, Wahab Alabi, Carey J. Simonson, Lee D. Wilson
Article
Chemistry, Multidisciplinary
Wahab O. Alabi, Abdalla H. Karoyo, Easwaran N. Krishnan, Leila Dehabadi, Lee D. Wilson, Carey J. Simonson
Article
Thermodynamics
Easwaran N. Krishnan, Hadi Ramin, Mohsen Shakouri, Lee D. Wilson, Carey J. Simonson
APPLIED THERMAL ENGINEERING
(2020)
Article
Energy & Fuels
Laith Al-Hyari, Miklos Kassai
Article
Thermodynamics
Laith Al-Hyari, Miklos Kassai
Summary: The variable refrigerant flow air-conditioning system, utilizing a variable-speed compressor, operates efficiently while reducing energy consumption. A TRNSYS model was used in the study to establish a simulation model, with validation showing close agreement between simulated and measured data, as well as proposing the addition of an Energy Recovery Ventilation system to save 18.8% of energy consumption annually.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2021)
Article
Construction & Building Technology
Wahab O. Alabi, Easwaran N. Krishnan, Abdalla H. Karoyo, Leila Dehabadi, Lee D. Wilson, Carey J. Simonson
Summary: This study investigates the latent effectiveness of flax-fiber coated energy wheels and compares them with commercially available desiccants and other biomaterials in a wide range of operating conditions. The findings can be useful for the research and development of bio-materials for energy recovery systems in building applications.
BUILDING AND ENVIRONMENT
(2021)
Article
Thermodynamics
Parisa Kazemiani-Najafabadi, Ehsan Amiri Rad, Carey James Simonson
Summary: This paper presents a novel ammonia-water cogeneration system driven by waste heat recovery, which can simultaneously generate cooling and power. By adjusting the maximum pressure and ammonia concentration, the ratio between net power and cooling capacity can be optimized, and the system can be further optimized using a genetic algorithm.
Article
Thermodynamics
Alireza Razmavar, Gurubalan Annadurai, Adesola Olufade, Carey J. Simonson
Summary: Crystallization fouling is a significant factor in the design and operation of membrane-based separation processes. This paper presents a semi-empirical model that predicts the fouling rate of membranes in liquid-to-air membrane energy exchangers (LAMEEs), and validates the model using experimental data.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Miklos Kassai
Summary: The research aimed to develop a thermal simulation model for investigating the thermal parameters of refrigerant systems, which was validated using experimental data and found MATLAB software to be the most suitable tool for energy consumption studies of refrigeration systems in commercial cold stores.
Article
Thermodynamics
Miklos Kassai
Article
Environmental Sciences
Miklos Kassai
JOURNAL OF SUSTAINABLE DEVELOPMENT OF ENERGY WATER AND ENVIRONMENT SYSTEMS-JSDEWES
(2019)
Proceedings Paper
Thermodynamics
Adesola O. Olufade, Carey J. Simonson
ASHRAE TRANSACTIONS 2019, VOL 125, PT 1
(2019)
Article
Energy & Fuels
Shitong Fang, Houfan Du, Tao Yan, Keyu Chen, Zhiyuan Li, Xiaoqing Ma, Zhihui Lai, Shengxi Zhou
Summary: This paper proposes a new type of nonlinear VIV energy harvester (ANVEH) that compensates for the decrease in peak energy output at low wind speeds by introducing an auxiliary structure. Theoretical and experimental results show that ANVEH performs better than traditional nonlinear VIV energy harvesters under various system parameter variations.
Article
Energy & Fuels
Wei Jiang, Shuo Zhang, Teng Wang, Yufei Zhang, Aimin Sha, Jingjing Xiao, Dongdong Yuan
Summary: A standardized method was developed to evaluate the availability of solar energy resources in road areas, which combined the Analytic Hierarchy Process (AHP) and the Geographic Information System (GIS). By analyzing critical factors and using a multi-indicator evaluation method, the method accurately evaluated the utilization of solar energy resources and guided the optimal location selection for road photovoltaic (PV) projects. The results provided guidance for the application of road PV projects and site selection for route corridors worldwide, promoting the integration of transportation and energy.
Article
Energy & Fuels
Chang Liu, Jacob A. Wrubel, Elliot Padgett, Guido Bender
Summary: The study investigates the effects of coating defects on the performance of the anode porous transport layer (PTL) in water electrolyzers. The results show that an increasing fraction of uncoated regions on the PTL leads to decreased cell performance, with continuous uncoated regions having a more severe impact compared to multiple thin uncoated strips.
Article
Energy & Fuels
Marcos Tostado-Veliz, Xiaolong Jin, Rohit Bhakar, Francisco Jurado
Summary: In this paper, a coordinated charging price mechanism for clusters of parking lots is proposed. The research shows that enabling vehicle-to-grid characteristics can bring significant economic benefits for users and the cluster coordinator, and vehicle-to-grid impacts noticeably on the risk-averse character of the uncertainty-aware strategies. The developed pricing mechanism can reduce the cost for users, avoiding to directly translate the energy cost to charging points.
Article
Energy & Fuels
Duan Kang
Summary: Building an energy superpower is a key strategy for China and a long-term goal for other countries. This study proposes an evaluation system and index for measuring energy superpower, and finds that China has significantly improved its ranking over the past 21 years, surpassing other countries.
Article
Energy & Fuels
Fucheng Deng, Yifei Wang, Xiaosen Li, Gang Li, Yi Wang, Bin Huang
Summary: This study investigated the synergistic blockage mechanism of sand and hydrate in gravel filling layer and the evolution of permeability in the layer. Experimental models and modified permeability models were established to analyze the effects of sand particles and hydrate formation on permeability. The study provided valuable insights for the safe and efficient exploitation of hydrate reservoirs.
Article
Energy & Fuels
Hao Wang, Xiwen Chen, Natan Vital, Edward Duffy, Abolfazl Razi
Summary: This study proposes a HVAC energy optimization model based on deep reinforcement learning algorithm. It achieves 37% energy savings and ensures thermal comfort for open office buildings. The model has a low complexity, uses a few controllable factors, and has a short training time with good generalizability.
Article
Energy & Fuels
Moyue Cong, Yongzhuo Gao, Weidong Wang, Long He, Xiwang Mao, Yi Long, Wei Dong
Summary: This study introduces a multi-strategy ultra-wideband energy harvesting device that achieves high power output without the need for external power input. By utilizing asymmetry, stagger array, magnetic coupling, and nonlinearity strategies, the device maintains a stable output voltage and high power density output at non-resonant frequencies. Temperature and humidity monitoring are performed using Bluetooth sensors to adaptively assess the device.
Article
Energy & Fuels
Tianshu Dong, Xiudong Duan, Yuanyuan Huang, Danji Huang, Yingdong Luo, Ziyu Liu, Xiaomeng Ai, Jiakun Fang, Chaolong Song
Summary: Electrochemical water splitting is crucial for hydrogen production, and improving the hydrogen separation rate from the electrode is essential for enhancing water electrolyzer performance. However, issues such as air bubble adhesion to the electrode plate hinder the process. Therefore, a methodology to investigate the two-phase flow within the electrolyzer is in high demand. This study proposes using a microfluidic system as a simulator for the electrolyzer and optimizing the two-phase flow by manipulating the micro-structure of the flow.
Article
Energy & Fuels
Shuo Han, Yifan Yuan, Mengjiao He, Ziwen Zhao, Beibei Xu, Diyi Chen, Jakub Jurasz
Summary: Giving full play to the flexibility of hydropower and integrating more variable renewable energy is of great significance for accelerating the transformation of China's power energy system. This study proposes a novel day-ahead scheduling model that considers the flexibility limited by irregular vibration zones (VZs) and the probability of flexibility shortage in a hydropower-variable renewable energy hybrid generation system. The model is applied to a real hydropower station and effectively improves the flexibility supply capacity of hydropower, especially during heavy load demand in flood season.
Article
Energy & Fuels
Zhen Wang, Kangqi Fan, Shizhong Zhao, Shuxin Wu, Xuan Zhang, Kangjia Zhai, Zhiqi Li, Hua He
Summary: This study developed a high-performance rotary energy harvester (AI-REH) inspired by archery, which efficiently accumulates and releases ultralow-frequency vibration energy. By utilizing a magnetic coupling strategy and an accumulator spring, the AI-REH achieves significantly accelerated rotor speeds and enhanced electric outputs.
Article
Energy & Fuels
Yi Yang, Qianyi Xing, Kang Wang, Caihong Li, Jianzhou Wang, Xiaojia Huang
Summary: In this study, a novel hybrid Quantile Regression (QR) model is proposed for Probabilistic Load Forecasting (PLF). The model integrates causal dilated convolution, residual connection, and Bidirectional Long Short-Term Memory (BiLSTM) for multi-scale feature extraction. In addition, a Combined Probabilistic Load Forecasting System (CPLFS) is proposed to overcome the inherent flaws of relying on a single model. Simulation results show that the hybrid QR outperforms traditional models and CPLFS exceeds the best benchmarks in terms of prediction accuracy and stability.
Article
Energy & Fuels
Wen-Jiang Zou, Young-Bae Kim, Seunghun Jung
Summary: This paper proposes a dynamic prediction model for capacity fade in vanadium redox flow batteries (VRFBs). The model accurately predicts changes in electrolyte volume and capacity fade, enhancing the competitiveness of VRFBs in energy storage applications.
Article
Energy & Fuels
Yuechao Ma, Shengtie Wang, Guangchen Liu, Guizhen Tian, Jianwei Zhang, Ruiming Liu
Summary: This paper focuses on the balance of state of charge (SOC) among multiple battery energy storage units (MBESUs) and bus voltage balance in an islanded bipolar DC microgrid. A SOC automatic balancing strategy is proposed considering the energy flow relationship and utilizing the adaptive virtual resistance algorithm. The simulation results demonstrate the effectiveness of the proposed strategy in achieving SOC balancing and decreasing bus voltage unbalance.
Article
Energy & Fuels
Raad Z. Homod, Basil Sh. Munahi, Hayder Ibrahim Mohammed, Musatafa Abbas Abbood Albadr, Aissa Abderrahmane, Jasim M. Mahdi, Mohamed Bechir Ben Hamida, Bilal Naji Alhasnawi, A. S. Albahri, Hussein Togun, Umar F. Alqsair, Zaher Mundher Yaseen
Summary: In this study, the control problem of the multiple-boiler system (MBS) is formulated as a dynamic Markov decision process and a deep clustering reinforcement learning approach is applied to obtain the optimal control policy. The proposed strategy, based on bang-bang action, shows superior response and achieves more than 32% energy saving compared to conventional fixed parameter controllers under dynamic indoor/outdoor actual conditions.
