Article
Energy & Fuels
Zhiwen Ma, Janna Martinek
Summary: Research has shown that utilizing high-temperature and high-efficiency supercritical CO2 Brayton cycle technology, combined with inexpensive and stable high-temperature heat transfer fluids and storage media, has the potential to improve the efficiency and reduce the cost of concentrating solar power generation.
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME
(2021)
Article
Thermodynamics
Yu Zhao, Zhiyuan Chang, Yuanyang Zhao, Qichao Yang, Guangbin Liu, Liansheng Li
Summary: This study investigates three sCO2 solar power generation systems, including a molten salt thermal storage system, a compressed CO2 energy storage system, and a combined molten salt thermal storage and compressed CO2 energy storage system. The research finds that the power generation system coupled with compressed CO2 storage has higher thermal and exergy efficiencies compared to the other two systems. It is also more cost-effective and has a shorter payback period.
Article
Energy & Fuels
Sergej Belik, Volker Dreissigacker, Stefan Zunft
Summary: Electrically heated regenerator storage is an energy- and cost-efficient solution, which converts excess electricity into high-temperature heat and stores it. We introduced a transient model to describe the thermodynamic behavior of this hybrid storage system with a minimum number of dimensionless parameters. Simulation results showed that the optimal location of electric heating elements inside the storage tank improved thermal storage capacity and performance, leading to increased cost efficiency and operational flexibility.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Green & Sustainable Science & Technology
Chao Li, Yang Sun, Tianjiao Bi, Rongrong Zhai
Summary: In this study, two different supercritical CO2 cycles are integrated with SPCP systems to enable the cascaded utilization of solar energy. The results demonstrate that both proposed systems have superior thermal performance compared to SPCP systems and are economically feasible.
Article
Energy & Fuels
Yirui Peng, Jianmin Gao, Yu Zhang, Jin Zhang, Qiaoqun Sun, Qian Du, Zhipei Tang, Tianhang Zhang
Summary: Compressed CO2 energy storage is a reliable solution for physical energy storage. The main challenge is achieving high-density storage of low-pressure CO2. In this study, a new adsorption transcritical compressed CO2 energy storage system was proposed, using adsorbents for low-pressure, high-density storage. The results showed that the storage density of the adsorption gas storage system was 43.46 kg/m3, 24.8 times higher than the density of CO2. Heating the adsorbents to above 160 degrees Celsius can further increase the storage density.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Paul Tafur-Escanta, Robert Valencia-Chapi, Miguel Lopez-Guillem, Olmo Fierros-Peraza, Javier Munoz-Anton
Summary: This work proposes a new Pumped Thermal Energy Storage (PTES) configuration that utilizes supercritical CO2 as the working fluid and molten salts as the thermal storage fluid. The proposed system achieves a net work of 12.46 MW during the load and 10 MW during the discharge, with an efficiency of 80.26%. Furthermore, a techno-economic optimization is conducted, resulting in a discounted cost per unit of energy discharged from this storage technology of 0.116 (sic)/kWh. This technology is a strong candidate for future energy solutions due to its low wear per duty cycle and easy power scalability, along with a lower initial cost compared to other technologies with low LCOS.
Article
Energy & Fuels
Lixia Sang, Xiaoyuan Lv, Yuancong Wang, Ji Huang, Yuting Wu
Summary: In this study, a new eutectic composition of KNO2-KNO3-K2CO3 ternary salt for sCO(2) solar thermal power generation is predicted and its thermophysical properties and corrosivity are investigated. The results show that the predicted ternary molten salt is confirmed as 0.259KNO(2)-0.687-KNO3-0.054K(2)CO(3). The eutectic salt exhibits good thermal stability and can operate at high temperatures up to 750.1 degrees C. It has a relatively low corrosion rate to stainless steel and shows promising potential as a high-temperature thermal storage material for solar thermal power generation.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Xiaojuan Niu, Ning Ma, Zhengkun Bu, Wenpeng Hong, Haoran Li
Summary: This paper investigates the potential of CO2-based binary mixtures in SPT systems by adding three additive gases to reduce the impact of high ambient temperature on the efficiency of supercritical CO2 Brayton cycle. The optimal split ratio is found to decrease with increasing main compressor inlet temperature and turbine inlet pressure. Additionally, CO2-propane shows potential for practical application as the pressure ratio has little effect on the optimal split ratio.
Review
Energy & Fuels
Enhua Wang, Ningjian Peng, Mengru Zhang
Summary: Improving energy efficiency and reducing carbon emissions are crucial for technological advancement in power systems. CO2 power systems offer an environmentally friendly alternative for power generation, especially for low-grade heat sources, with various advantages in different applications.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Thermodynamics
Markus Hofer, Haikun Ren, Frieder Hecker, Michael Buck, Dieter Brillert, Joerg Starflinger
Summary: This paper presents the design, layout, and control of a supercritical carbon dioxide heat removal system. The system can start up with low thermal power and operate steadily under different environmental conditions.
Article
Thermodynamics
Eydhah Almatrafi, Mohd Asjad Siddiqui
Summary: This paper presents a thermodynamic performance evaluation of a novel solar based supercritical CO2 (S-CO2) cycle and low temperature adsorption desalination (AD) cycle for power, heating, and freshwater. The results show that the thermal efficiency of the solar tower receiver improves with increasing DNI and the thermal and exergy efficiencies of the S-CO2 power cycle are higher at higher inlet pressures of the expander. In addition, the thermal efficiency of electrical and heating is obtained at operating conditions and the highest SDWP achieved is 12.5 m3/ton/day at a fixed operating condition.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Jose Ignacio Linares, Arturo Martin-Colino, Eva Arenas, Maria Jose Montes, Alexis Cantizano, Jose Ruben Perez-Dominguez
Summary: This paper presents a novel hybrid CSP-PV power plant that integrates both PV and thermal solar fields using a high-temperature heat pump. The proposed system eliminates the decrease in power injection caused by storage seen in conventional hybrid plants.
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Sridharan Ramesh, Douglas Straub
Summary: This study investigates the possibility of cooling the vanes and blades of a direct-fired sCO(2) turbine using film cooling. The operating conditions and fluid properties of the direct-fired sCO(2) cycle can affect the flow characteristics and mixing of the coolant jet. Limited information is available on the performance of film cooling using supercritical CO2. The study aims to estimate film cooling effectiveness and the impact of crossflow-to-mainstream velocity ratio on the coolant jet, using computational fluid dynamics and a cooled turbine model.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2023)
Article
Thermodynamics
Lei Gao, Tao Cao, Yunho Hwang, Reinhard Radermacher
Summary: Supercritical CO2 power cycle offers higher thermal efficiency, with optimization of system configurations leading to improved performance and applicability. One-split configuration is recommended for better system performance and robustness evaluation.
Review
Energy & Fuels
Adriana Santamaria Padilla, Hernando Romero-Paredes Rubio
Summary: This work emphasizes the importance of thermal energy storage and the different ways to achieve it. The use of thermochemical heat is highlighted as it offers better performance in mitigating the intermittency and day-night alternation of solar resources. The study focuses on selecting suitable thermochemical materials for solar power generation systems and discusses the factors influencing experimental analysis. The article also emphasizes the need for collaboration in searching for commercializable materials in the medium term. Furthermore, it provides a parametric review of thermochemical systems and highlights the importance of inert gases and their influence on chemical kinetics. The study also presents a thermodynamic analysis of different materials and provides criteria for selecting suitable materials for thermal energy storage.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Xueyu Chang, Yuxing Li, Jianlu Zhu, Xuehui Zhang, Wen Li, Chao Wang, Haisheng Chen, Jie Chen, Weiping Zeng
Summary: This study analyzes the effects of three different sloshing forms on the liquefaction performance and equipment of DMR system through sloshing experiments. The results show that sloshing reduces liquefaction performance, increases power consumption, and has adverse effects on fluid distribution and heat transfer in the heat exchanger.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Nuclear Science & Technology
Dong Yang, Lin Chen, Yongchang Feng, Haisheng Chen
Summary: This paper investigates the heat transfer mechanism of supercritical water during the transition process from subcritical to supercritical states. The results reveal that the difference in thermophysical properties between the boundary layer and the core region is the main reason for the heat transfer behavior, and the flow structure on the buffer layer is a dominating factor for heat transfer deterioration.
NUCLEAR SCIENCE AND ENGINEERING
(2023)
Article
Thermodynamics
Han Zhang, Liang Wang, Xipeng Lin, Haisheng Chen
Summary: The Joule-Brayton cycle-based pumped thermal electricity storage (PTES) system has a simple structure, high energy density, and geographical independence, which has broad application prospects. This study conducted multi-dimensional optimization and detailed analysis of loss and thermo-economic performance for PTES systems with various charging/discharging durations. The results showed that longer charging/discharging duration enhances the economic performance and the optimal dimensions of the cold and hot reservoirs are different.
Article
Thermodynamics
Zi-Yu Liu, Lin Chen, Haisheng Chen
Summary: This study focused on the optimization of the CO2 potential model for molecular dynamics simulation in the supercritical region. The results showed that the optimized model provided accurate descriptions of CO2 properties and heat transfer in the supercritical state.
HEAT TRANSFER ENGINEERING
(2023)
Article
Energy & Fuels
Liang Wang, Xipeng Lin, Han Zhang, Long Peng, Haoshu Ling, Shuang Zhang, Haisheng Chen
Summary: A novel pumped thermal-liquid air energy storage (PTLAES) system is proposed in this paper, which converts electricity to heat and liquid air and re-converts them to electricity when needed. With a high energy storage density and no requirement for low-density cold storage devices, the PTLAES system shows round-trip efficiencies in the range of 58.7% to 63.8% and an energy storage density of 107.6 kWh/m3 when using basalt as the thermal energy storage material.
Article
Thermodynamics
Lin Lin, Liang Wang, Yakai Bai, Xipeng Lin, Shuang Zhang, Zhiwei Ge, Long Peng, Haisheng Chen
Summary: Thermal energy storage (TES) is an effective solution to the temporal mismatch between energy generation and users' requirements. The spray-type packed bed TES technology, with its high efficiency and low cost, shows promising development prospects. Experimental results indicate that the charging temperature and flow rate have minimal impact on the heat storage performance, and higher charging temperature and lower flow rate result in a more uniform temperature distribution.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Environmental
Binlin Dou, Kai Wu, Hua Zhang, Bingbing Chen, Haisheng Chen, Yujie Xu
Summary: In this study, a sorption-enhanced chemical looping steam reforming process for glycerol was proposed to achieve simultaneous CO2 capture and conversion, resulting in the generation of high purity hydrogen and syngas. The results demonstrated that the use of appropriate catalysts and sorbents can effectively generate hydrogen and reduce CO2 emissions in an integrated process.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Ruijia Ren, Binlin Dou, Hua Zhang, Kai Wu, Yadong Wang, Haisheng Chen, Yujie Xu
Summary: In this study, a mesoporous Ni/CeO2 catalyst with high specific surface area was prepared and used for glycerol dry reforming. Thermodynamic analysis was conducted to minimize Gibbs's free energy. The characterization results showed that a higher Ni content resulted in weaker interaction between Ni and the CeO2 support. The 5Ni/CeO2 catalyst exhibited the best catalytic activity and glycerol conversion reached 84.1% at 750 degrees C. The catalysts also showed excellent stability during the 10-hour catalytic process. The activation energy of the Ni-based catalyst for glycerol dry reforming was calculated using a kinetic model assuming a power law as a first-order reaction.
Article
Thermodynamics
Chunyang Wang, Xiao Yang, Yanan Shen, Ting Zhang, Xinghua Zheng, Haisheng Chen
Summary: A three-dimensional numerical study was conducted to investigate the cooling performance of a thermoelectric module with multilayer pyramid thermoelectric legs. Two physical models, rectangular shaped and multilayer pyramid thermoelectric cooling modules, were compared. The study focused on the effect of leg height, side ratio, and the number of leg layers on the cooling performance. The results showed that the multilayer pyramid module had better cooling performance than the rectangular shaped module, with a maximum reduction of 11.25 K in the minimum averaged temperature of the cold surface. However, the cooling performance of the multilayer pyramid module was not very good when the values of side ratio and the number of leg layers were low. A recommended map for evaluating the cooling performance was presented based on the side ratio, the number of leg layers, and the heights of thermoelectric legs.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Materials Science, Composites
Chang Liu, Hualiang Zhang, Haisheng Chen, Yujie Xu, Yangli Zhu
Summary: This work presents a beam element approach for the modeling and high-efficiency simulation of mechanical properties of 2.5D woven composite. A technical scheme for the parametric modeling of 2.5D woven fabrics was proposed, and a method for creating matrix beam elements was also developed. The mechanical properties of the 2.5D woven composite were then simulated using a beam element solver.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Thermodynamics
Xiuyan Yue, Yujie Xu, Xuezhi Zhou, Xinjing Zhang, Youqiang Linghu, Xiang Wang, Haisheng Chen
Summary: A novel combined cooling and heating storage system based on zeolite-water is proposed to effectively recover low and medium grade heat energy. The system combines zeolite-water adsorption process with water evaporation refrigeration process to generate cold energy and heat energy simultaneously. The study reveals the change laws of system performances during the discharging process, such as energy generated, energy conversion coefficient, and energy density. This research provides a way for efficient utilization of low and medium grade heat energy.
JOURNAL OF THERMAL SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Yanan Shen, Xue Han, Pengyu Zhang, Xinyi Chen, Xiao Yang, Ding Liu, Xiaona Yang, Xinghua Zheng, Haisheng Chen, Kun Zhang, Ting Zhang
Summary: With the development of IoT technology, wearable electronics have brought significant changes to our lives. The demand for low power consumption and mini-type power systems for wearable electronics is more urgent than ever. Thermoelectric materials are ideal candidates for wearable power systems as they can efficiently convert temperature difference into electrical energy without mechanical components. This review comprehensively introduces the complete process from thermoelectric materials to single-fiber/yarn devices to thermoelectric textiles, summarizing strategies for enhancing thermoelectric performance, processing techniques for fiber devices, and applications of thermoelectric textiles. Additionally, challenges and future prospects in the field are discussed.
ADVANCED FIBER MATERIALS
(2023)
Article
Energy & Fuels
Jixiang Chen, Zhitao Zuo, Xin Zhou, Wenbin Guo, Jianting Sun, Haisheng Chen
Summary: This article presents a multiobjective optimization design method for the radial inlet chamber (RIC) of the oblique flow compressor in CAES system. After optimization, the RIC area is expanded, the transition of the meridian profile is smoother, and both the distortion coefficient and total pressure loss coefficient are reduced. By using the optimized RIC, the performance of the oblique flow compressor has been improved.
Article
Energy & Fuels
Han Zhang, Liang Wang, Xipeng Lin, Haisheng Chen
Summary: This study innovatively proposes two operation modes for compressors and expanders operating at a constant rotational speed (CRS) and compares their performances with the traditional constant compression ratio (CCR) operation mode. The results show that the proposed CRS operation mode significantly improves the system storage performance. This research provides a theoretical basis for formulating appropriate system control schemes and further optimizing operational control strategies.
Article
Chemistry, Multidisciplinary
Yuanyuan Jing, Jun Luo, Xue Han, Jiawei Yang, Qiulin Liu, Yuanyuan Zheng, Xinyi Chen, Fuli Huang, Jiawen Chen, Qinliang Zhuang, Yanan Shen, Haisheng Chen, Huaizhou Zhao, G. Jeffrey Snyder, Guodong Li, Ting Zhang, Kun Zhang
Summary: Researchers have developed a large-area, durable, washable, and skin-conformable wearable thermoelectric textile that can rapidly and stably cool the body surface and be powered by solar energy, reducing energy consumption.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
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.
