Article
Construction & Building Technology
Attila Kostyak, Szabolcs Szekeres, Imre Csaky
Summary: Previous studies have shown that mechanical cooling energy can be reduced significantly with indirect evaporative cooling (IEC) process. This study determines the conditions under which sensible cooling performance can be achieved. IEC cannot adequately manage indoor humidity load, requiring a supplementary cooling system that may increase cooling energy consumption.
Article
Construction & Building Technology
Hongkuan Zhang, Hongting Ma, Shuo Ma
Summary: A novel device integrating IEC technology and liquid dehumidification technology was developed and shown to achieve higher dehumidification rate and heat flux under different conditions. The performance of this device was found to be superior in hot and humid climates compared to traditional IEC systems.
ENERGY AND BUILDINGS
(2021)
Article
Thermodynamics
Yayun Tang, Jie Ji, Hao Xie, Chengyan Zhang, Xinyi Tian
Summary: Building integrated photovoltaic (BIPV) technology is a promising solution for meeting the electricity and heat demands in buildings, but PV overheating reduces production and increases energy consumption. This study proposes novel ventilation PV curtain wall systems to address overheating and save energy. Mathematical models and economic analysis show that these systems can significantly reduce energy consumption.
Article
Engineering, Chemical
Lanbo Lai, Xiaolin Wang, Gholamreza Kefayati, Eric Hu
Summary: A new configuration of a solid desiccant evaporative cooling system integrated with a humidification-dehumidification desalination unit was proposed and its performance was evaluated. Two operation modes were proposed depending on climate conditions, and the system was evaluated under various operating conditions. The findings indicated that the proposed system had good potential for producing freshwater and cooling simultaneously.
Article
Construction & Building Technology
Chenjiyu Liang, Xianting Li, Lin Fang, Takema Nakazawa, Toshio Tanaka
Summary: In this study, a fresh air handling unit with exhaust air heat recovery is constructed using grade matching of loads and waste and natural energies. The improved system configuration, determined under different typical fresh air parameter conditions, ensures efficient operation throughout the year. Numerical models show that the proposed system achieves higher energy efficiency and a shorter payback period compared to the traditional system.
ENERGY AND BUILDINGS
(2023)
Article
Thermodynamics
Maisha Mumtaz, Bryan C. Pamintuan, Andrew J. Fix, James E. Braun, David M. Warsinger
Summary: This paper presents a new air conditioning system that combines membrane-based dehumidification with dewpoint evaporative cooling, aiming to achieve energy efficiency and environmental friendliness. The system has a high coefficient of performance and water utilization rate, and it emits significantly less greenhouse gases compared to traditional air conditioning systems.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
Ghulam Hussain, Muhammad Aleem, Muhammad Sultan, Uzair Sajjad, Sobhy M. Ibrahim, Redmond R. Shamshiri, Muhammad Farooq, Muhammad Usman Khan, Muhammad Bilal
Summary: The study investigates the performance of a Maisotsenko cycle evaporative cooling assisted solid desiccant air-conditioning (M-DAC) system for agricultural storage. A lab-scale solid silica gel-based desiccant AC (DAC) system was developed and its thermodynamic performance was studied. The M-DAC system showed good performance in terms of temperature and humidity range, cooling potential, and energy consumption.
Article
Thermodynamics
Yunran Min, Wenchao Shi, Boxu Shen, Yi Chen, Hongxing Yang
Summary: An indirect Evaporative Cooler (IEC) is a promising technology for air-conditioning energy recovery in hot and humid regions. Surface modification with hydrophobic nanoparticles on primary air channels can enhance condensation heat transfer and improve energy-saving rates. The hydrophobic-coating treatment shows potential for applications in AC systems under dehumidifying conditions.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Liang Chun, Guangcai Gong, Pei Peng, Yangda Wan, Kian Jon Chua, Xi Fang, Wenqiang Li
Summary: A novel building cooling system, the DAV-cooling system, is proposed in this study, which integrates dew point evaporative cooling, air-carrying energy radiant air conditioning, and vacuum membrane-based dehumidification. The system does not use organic refrigerants and can provide fresh air indoors while being flexibly adjusted to meet various cooling requirements.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Review
Construction & Building Technology
Shekh Abdullah, Mohd Nashrul Bin Mohd Zubir, Mohd Ridha Bin Muhamad, Kazi Md Salim Newaz, Hakan F. Oztop, Md Shadab Alam, Kaleemullah Shaikh
Summary: Internal space cooling technology is shifting towards alternative solutions to conventional vapor compression systems in order to mitigate global warming. The development and commercialization of innovative cooling systems are currently underway, with evaporative cooling systems being one possible solution. However, their market penetration is limited due to challenges in diverse climate conditions. This critical review explores various evaporative cooling systems and their recent developments, compares their performance, and discusses the effects of different dehumidification systems on the evaporative cooling system. The analysis shows that independent dehumidification before cooling can effectively improve the efficiency of the evaporative cooling system, making it a promising replacement for vapor compression systems in different outdoor conditions.
ENERGY AND BUILDINGS
(2023)
Review
Chemistry, Inorganic & Nuclear
Xiaoyu Zhang, Chunquan Li, Amutha Chinnappan, Shuilin Zheng, Zhiming Sun, Chinnappan Baskar, Seeram Ramakrishna
Summary: The high energy consumption of space cooling poses challenges to the global energy crisis and environmental governance. However, the use of moisture-absorbing metal-organic frameworks (MOFs) coated heat exchangers in air conditioners can effectively separate latent loads from sensible loads resulting in more efficient dehumidification. This review provides a detailed analysis of MOFs water adsorption and highlights optimization techniques for dehumidifying coatings. The advantages of MOF-coated heat exchangers (MCHEs) and their performance under different factors are summarized, and strategies for energy-efficient dehumidification and cooling effects are proposed.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Thermodynamics
Qilong Liu, Chunmei Guo, Zhenjing Wu, Yuwen You, Yan Li
Summary: This paper proposes an optimized model for indirect evaporative cooling, which is verified through experimental data. The optimal heat transfer area of IEC as a fresh air pre-cooling unit is analyzed based on the model. Simulation results show that IEC can achieve energy savings throughout the year.
BUILDING SIMULATION
(2022)
Article
Thermodynamics
Yanling Zhang, Hao Zhang, Hongxing Yang, Yi Chen, Chun Wah Leung
Summary: Using auxiliary internal cooling is an effective way to improve the dehumidification effectiveness of the liquid desiccant dehumidifier compared with the adiabatic dehumidifier. Indirect evaporative cooling is a promising solution for internal cooling due to its high efficiency and environmentally friendly features. Through a numerical model, the thermal performance of the dehumidifier was analyzed, and various influential parameters were identified.
APPLIED THERMAL ENGINEERING
(2022)
Article
Construction & Building Technology
Hongkuan Zhang, Hongting Ma, Shuo Ma, Mingchang Yang
Summary: This study presented a novel heat and mass exchanger integrating indirect evaporative cooling and liquid dehumidification techniques, which can improve energy efficiency through optimized design and is suitable for air conditioning systems in hot and humid areas.
ENERGY AND BUILDINGS
(2021)
Review
Energy & Fuels
Kalpana, Sudhakar Subudhi
Summary: The vapor compression air conditioning (VCAC) is the most widely used method for space cooling, but it has disadvantages such as consuming more electricity and contributing to global warming. The liquid desiccant system using an evaporative cooler is a cost-effective and environmentally sustainable alternative. By integrating liquid desiccant dehumidifiers with evaporative coolers, energy consumption can be reduced, especially in hot and humid areas.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(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)