Article
Green & Sustainable Science & Technology
Zeinab Aghaziarati, Abolfazl Hajizadeh Aghdam
Summary: This paper proposes a solar organic Rankine cycle integrated cascade refrigeration system to meet a hospital's heating, cooling, and electricity demands, and analyzes the system from energy, exergy, and exergoeconomic point of view. The solar collector is identified as the main source of irreversibility, and factors such as working fluid, collector type, solar irradiation, and ambient temperature are investigated for their impact on system performance. The study concludes that cyclohexane is more efficient from energy and exergy perspective, while octane is more efficient from an exergoeconomic point of view.
Article
Energy & Fuels
Fatih Sorgulu, Ibrahim Dincer
Summary: This paper studies renewable hydrogen production and blending with natural gas in existing pipelines, comparing with various conventional fuels. Solar and wind energy systems are designed, an electrolyzer is used to produce hydrogen for residential energy needs, and cost and environmental impacts are evaluated.
Article
Thermodynamics
Ziyi Lu, Liqiang Duan, Zhen Wang, Hanfei Zhang
Summary: This paper proposes a new molten carbonate fuel cell-steam turbine-combined cooling, heating and power (MCFC-ST-CCHP) system and investigates its performance with three different solar energy integration modes. The study finds that the best solar integration mode is to replace part of the heating load of high pressure boiler drum. Furthermore, the impact of solar irradiation intensity on the system is also examined.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Mingshun Zhang, Xiaoyuan Chen, Yu Chen, Shan Jiang, Boyang Shen
Summary: This paper introduces a new concept of energy supply for hospital buildings, utilizing cryogen-based technology to achieve combined operation of cooling, heating, power generation, and oxygen production, aiming to achieve energy conservation, emission reduction, and sustainable energy supply.
Article
Thermodynamics
Zhenhua Fang, Zhen Pan, Guiyang Ma, Jingxian Yu, Liyan Shang, Zhien Zhang
Summary: This paper designs and investigates a novel combined cooling, heating, and power (CCHP) system that effectively utilizes liquefied natural gas (LNG) cold energy and waste heat of exhaust gas. The study analyzes the impact of various parameters on the system performance and employs optimization algorithms to find the optimal operating conditions. The results show that PSO outperforms NSGA-II in multi-objective optimization of the CCHP system, achieving an exergy efficiency of 70.20%, a product unit cost of 21.50 $/GJ, and a product unit environmental impact of 57.91 mPts/GJ.
Article
Green & Sustainable Science & Technology
Hakan Caliskan, Emin Acikkalp, H. Rostamnejad Takleh, V. Zare
Summary: In this study, various techniques such as advanced exergoeconomic analysis and combined extended-advanced exergy analysis are applied to evaluate a novel ejector-based CO2 transcritical CCHP system powered by geothermal energy. It is found that improving the efficiency of the evaporator and domestic water heater components is crucial for overall system performance.
Article
Thermodynamics
Ali Tavakkol Aghaei, Rahim Khoshbakhti Saray
Summary: The proposed system in a dairy factory consists of a combined cooling, heating, and power system driven by a gas turbine prime mover and an auxiliary boiler. The optimization process is based on three different objective functions, and the results show the impact of system design on the air compressor pressure ratio. Recommendations were made regarding the necessity of an air pre-heater in the system.
Article
Engineering, Chemical
Ray Soujoudi, Randall Manteufel
Summary: The study investigates the feasibility of using environmentally friendly refrigerant compound, ammonia, in the LNG pre-cooling cycle, showing that increasing ammonia's concentration in the mixed refrigerants can enhance performance and reduce energy consumption. Economic analyses reveal that MR-1 mixed refrigerant benefits the most from higher ammonia concentration, resulting in lower capital and operational costs.
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
Green & Sustainable Science & Technology
Parisa Ghorbani, Kamel Smida, Mohammd Mehdi Razzaghi, Mehdi Javaheran Yazd, S. Mohammad Sajadi, Seyed Amin Bagherzadeh, Mustafa Inc
Summary: This study models and analyzes the economic exergy of a 60 MW heat and power generation power plant in the Esfahan steel company. The findings suggest that optimizing the operating conditions, such as increasing the load ratio and adjusting the feedwater temperature and condenser pressure, can reduce energy/exergy loss.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Environmental Sciences
Z. Liu, M. A. Ehyaei
Summary: This paper evaluates the integration of biomass-fueled micro-gas turbine (MGT) with superheated Kalina cycle through energy, exergy, economic, and exergoenvironmental analyses. The research finds that this integration improves the system's energy and exergy efficiency, and is economically beneficial.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Thermodynamics
Mohd Asjad Siddiqui
Summary: Internal combustion engines waste energy through the release of exhaust gases, leading to engine inefficiencies and harmful emissions. A study implemented a bottoming cycle to generate power, heating, and cooling using waste heat from a natural gas-powered HCCI engine. The incorporation of S-CO2 and ERC cycles significantly improved system efficiencies. The proposed system achieved thermal efficiencies of 53.86% for electrical output, 7.801% for heating output, and 3.239% for cooling output. The HCCI engine contributed the most to energy losses in the system.
Article
Thermodynamics
Siyang Zheng, Chenghao Li, Zhiyong Zeng
Summary: This study presents a thermoeconomic model and optimization of a pre cooler-integrated dual-stage combined cycle technology, indicating its suitability for low NG distribution pressure and medium to large-scale applications, providing engineers and project developers with a pathway for implementing a new technology.
Article
Thermodynamics
Xinwei Wang, Liqiang Duan
Summary: A new method of gas turbine interstage extraction gas is proposed to improve the peak regulation performance of GTCC-based CHP system. The results indicate that this method helps expand the heat and power operation regions of the system, increasing the integration of renewable energy.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Zhen Wang, Liqiang Duan, Zuxian Zhang
Summary: A thermoeconomic cost model of a typical gas turbine combined cycle system was established in this study based on the structure theory of thermoeconomics. The study compared thermoeconomic performances of GTCC with different strategies to analyze their influence on the unit thermoeconomic cost of each component. Results showed that changing the operation strategy of gas turbine can reduce the generator unit thermoeconomic cost, with higher GT inlet/outlet temperatures helpful in reducing thermoeconomic cost under off-design conditions.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Alexandros Arsalis, Soren K. Kaer, Mads P. Nielsen
Article
Construction & Building Technology
Alexandros Arsalis, Andreas Alexandrou
ENERGY AND BUILDINGS
(2015)
Article
Energy & Fuels
Alexandros Arsalis, Andreas N. Alexandrou
Article
Energy & Fuels
Alexandros Arsalis, Andreas N. Alexandrou, George E. Georghiou
Correction
Energy & Fuels
Alexandros Arsalis, Andreas N. Alexandrou, George E. Georghiou
Article
Green & Sustainable Science & Technology
Alexandros Arsalis, Andreas N. Alexandrou, George E. Georghiou
JOURNAL OF CLEANER PRODUCTION
(2018)
Article
Green & Sustainable Science & Technology
Alexandros Arsalis, Andreas N. Alexandrou, George E. Georghiou
Correction
Chemistry, Physical
Alexandros Arsalis, Mads Pagh Nielsen, Soren Knudsen Kaer
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2013)
Article
Energy & Fuels
Alexandros Arsalis, George E. Georghiou
Review
Green & Sustainable Science & Technology
Alexandros Arsalis
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2019)
Article
Chemistry, Multidisciplinary
Alexandros Arsalis, George E. Georghiou
APPLIED SCIENCES-BASEL
(2019)
Article
Green & Sustainable Science & Technology
Alexandros Arsalis
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2019)
Review
Energy & Fuels
Alexandros Arsalis, George E. Georghiou, Panos Papanastasiou
Summary: This study provides a comprehensive review of the recent research progress of hybrid photovoltaic-regenerative hydrogen fuel cell (PV-RHFC) microgrid systems. It discusses the components, modeling, control strategies, and application options of these systems. Commercializing this system requires cost reduction and improved energy management control capabilities.
Review
Green & Sustainable Science & Technology
Alexandros Arsalis, Panos Papanastasiou, George E. Georghiou
Summary: This study critically compares the integration capabilities and implications of lithium-ion batteries and regenerative hydrogen fuel cells with PV-based energy systems. It analyzes the key comparison criteria and provides insights for future research and development directions.