The Experts below are selected from a list of 556818 Experts worldwide ranked by ideXlab platform
Masoud Ziabasharhagh - One of the best experts on this subject based on the ideXlab platform.
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introducing a novel liquid air cryogenic energy storage system using phase change material solar parabolic trough collectors and kalina Power cycle process integration pinch and exergy analyses
2021Co-Authors: Armin Ebrahimi, Bahram Ghorbani, Fatemeh Skandarzadeh, Masoud ZiabasharhaghAbstract:Abstract Today, using new energy storage systems for peak shaving and load leveling with the approach of maximizing the efficiency of energy systems is inevitable. In the present study, a cogeneration integrated Structure of Power and cooling using liquefied natural gas regasification and solar collectors is developed and analyzed. In this regard, the purposes can be achieved by producing liquid air at an off-peak time and storing it as a cryogenic energy storage system and recovering it on-peak time. This new integrated Structure generates 11.66 MW Power and 4.502 MW cooling at the on-peak time. A Kalina-based combined cooling and Power cycle and a gas turbine Power generation unit are used to generate Power from liquid air. Phase change material is used to store the heat from the compressed air entering the liquefaction stage (at the off-peak time) and recovering it at the on-peak time as the heat source of the Kalina cycle. Also, the solar parabolic trough collector provided with Zahedan climatic conditions the heat required for the direct expansion section. The electrical storage, round-trip, energy storage, and exergy efficiencies of the proposed energy storage system are 57.62%, 45.44%, 79.87%, and 40.17%, respectively. The most exergy destruction belongs to the heat exchangers section, which accounts for 50.85% of the total exergy destruction. One of the important results of the parametric study is the increase of round-trip and electrical storage efficiencies up to 47.59% and 61.60%, respectively, by minimizing the pressure of the inlet air to the liquefaction stage while maximizing the pressure of the liquid air inlet to the Power generation stage.
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introducing a novel integrated cogeneration system of Power and cooling using stored liquefied natural gas as a cryogenic energy storage system
2020Co-Authors: Armin Ebrahimi, Bahram Ghorbani, Masoud ZiabasharhaghAbstract:Abstract Nowadays, it is inevitable to use energy storage systems for peak shaving and load leveling purposes. In the present study, a new integrated Structure of Power generation and refrigeration is developed for the use and recovery of the stored liquid natural gas energy as a cryogenic energy storage system. Kalina Power cycle, molten carbonate fuel cell, carbon dioxide Power cycle, and absorption-compression refrigeration system using solar energy are employed to achieve this goal. This new integrated Structure generates 161,287 kW Power, 1964 kW refrigeration at 266 K through LNG recovery with 4.066 kg/s mass flow rate and 8464 kW refrigeration at 218.5 K. Electrical, thermal and exergy efficiencies of the whole system are 57.92%, 61.66%, and 68.21%, respectively. In the present study, considering the efficiency of the LNG production and storage sector at the off-peak time as well as its cryogenic energy recovery sector at the on-peak time, round-trip efficiency of the proposed cryogenic storage system is calculated as 66.29%. Via the parametric study on major system parameters such as Tu101 and Tu102 turbines inlet pressures, Tu201 turbine outlet temperature, etc., the performance of the system in various conditions is evaluated. Important results of the parametric study include an increase in the system total thermal efficiency up to 70.03% by reducing the outlet temperature of the Tu201 turbine to 880 K.
Oleg Lugovoy - One of the best experts on this subject based on the ideXlab platform.
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carbon emission scenarios of china s Power sector impact of controlling measures and carbon pricing mechanism
2018Co-Authors: Xiaoqi Zheng, Xuchen Zhao, Yi Chen, Oleg LugovoyAbstract:Abstract The study constructs a low-carbon path analysis model of China's Power sector based on TIMES model and presents a comparative analysis of carbon emissions under Reference, Low-Carbon and Enhanced Low-Carbon scenarios, and the main difference of the three scenarios is manifested by policy selection and policy strength. The conclusions are drawn as follows: (1) The peak of carbon emission in China's Power sector will range from 4.0 GtCO2 to 4.8 GtCO2, which implies an increment of 0.5–1.3 billion or 14%–35% from the 2015 levels. (2) Introducing carbon price is an effective way to inhibit coal Power and promote non-fossil fuels and Carbon Capture, Utilization and Storage applications (CCUS). The carbon emission reduction effects will gradually increase with carbon price. When the carbon price attains to CN¥150 t−1CO2, the CO2 emission can decrease by 36% than that without carbon price. (3) CCUS is one of important contributing factor to reduce CO2 emission in Power sector. Generally speaking, the development of non-fossil fuels and energy efficiency improvement are two main drivers for carbon mitigation, but once the carbon price reaches up to CN¥106 t−1CO2, the CCUS will be required to equip with thermal Power units and its contribution on carbon emission reduction will remarkably increase. When carbon price increases to CN¥150 t−1CO2 in 2050, the application of CCUS will account for 44% of total emission reduction. (4) In the scenario with carbon price of CN¥150 t−1CO2, Power sector would be decarbonized significantly, and the CO2 intensity will be 0.22 kgCO2 (kW h)−1, but Power sector is far from the goal that achieving net zero emission. In order to realize the long-term low greenhouse gas emission development goal that proposed by the Paris Agreement, more efforts are needed to be put to further reduce the carbon emission reduction of Power sector. Based on the above scenario analysis, the study proposes four recommendations on the low-carbon development of China's Power sector: (1) improve the energy efficiency proactively and optimize the energy Structure of Power sector gradually; (2) promote the low-carbon transition of Power sector by using market-based mechanism like carbon emission trading scheme to internalize the external cost of carbon emission; (3) give more emphasis on and support to the CCUS application in Power sector.
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Carbon emission scenarios of China's Power sector: Impact of controlling measures and carbon pricing mechanism
2018Co-Authors: Qiang Liu, Xiaoqi Zheng, Xuchen Zhao, Yi Chen, Oleg LugovoyAbstract:The study constructs a low-carbon path analysis model of China's Power sector based on TIMES model and presents a comparative analysis of carbon emissions under Reference, Low-Carbon and Enhanced Low-Carbon scenarios, and the main difference of the three scenarios is manifested by policy selection and policy strength. The conclusions are drawn as follows: (1) The peak of carbon emission in China's Power sector will range from 4.0 GtCO2 to 4.8 GtCO2, which implies an increment of 0.5–1.3 billion or 14%–35% from the 2015 levels. (2) Introducing carbon price is an effective way to inhibit coal Power and promote non-fossil fuels and Carbon Capture, Utilization and Storage applications (CCUS). The carbon emission reduction effects will gradually increase with carbon price. When the carbon price attains to CN¥150 t−1CO2, the CO2 emission can decrease by 36% than that without carbon price. (3) CCUS is one of important contributing factor to reduce CO2 emission in Power sector. Generally speaking, the development of non-fossil fuels and energy efficiency improvement are two main drivers for carbon mitigation, but once the carbon price reaches up to CN¥106 t−1CO2, the CCUS will be required to equip with thermal Power units and its contribution on carbon emission reduction will remarkably increase. When carbon price increases to CN¥150 t−1CO2 in 2050, the application of CCUS will account for 44% of total emission reduction. (4) In the scenario with carbon price of CN¥150 t−1CO2, Power sector would be decarbonized significantly, and the CO2 intensity will be 0.22 kgCO2 (kW h)−1, but Power sector is far from the goal that achieving net zero emission. In order to realize the long-term low greenhouse gas emission development goal that proposed by the Paris Agreement, more efforts are needed to be put to further reduce the carbon emission reduction of Power sector. Based on the above scenario analysis, the study proposes four recommendations on the low-carbon development of China's Power sector: (1) improve the energy efficiency proactively and optimize the energy Structure of Power sector gradually; (2) promote the low-carbon transition of Power sector by using market-based mechanism like carbon emission trading scheme to internalize the external cost of carbon emission; (3) give more emphasis on and support to the CCUS application in Power sector. Keywords: Power sector, TIMES model, Scenario analysis, Carbon peak, Carbon pricing, Policy recommendation
Hassan Monsef - One of the best experts on this subject based on the ideXlab platform.
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a new self scheduling strategy for integrated operation of wind and pumped storage Power plants in Power markets
2011Co-Authors: Ali Karimi Varkani, Ali Daraeepour, Hassan MonsefAbstract:Competitive Structure of Power markets causes various challenges for wind resources to participate in these markets. Indeed, production uncertainty is the main cause of their low income. Thus, they are usually supported by system operators, which is in contrast with the competitive paradigm of Power markets. In this paper, a new strategy for increasing the profits of wind resources is proposed. In the suggested strategy, a Generation Company (GenCo), who owns both wind and pumped-storage plants, self-schedules the integrated operation of them regarding the uncertainty of wind Power generation. For presenting an integrated self-schedule and obtaining a real added value of the strategy, participation of the GenCo in energy and ancillary service markets is modeled. The self-scheduling strategy is based on stochastic programming techniques. Outputs of the problem include generation offers in day-ahead energy market and ancillary service markets, including spinning and regulation reserve markets. A Neural Network (NN) based technique is used for modeling the uncertainty of wind Power production. The proposed strategy is tested on a real wind farm in mainland, Spain. Moreover, added value of the strategy is presented in different conditions of the market.
Armin Ebrahimi - One of the best experts on this subject based on the ideXlab platform.
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introducing a novel liquid air cryogenic energy storage system using phase change material solar parabolic trough collectors and kalina Power cycle process integration pinch and exergy analyses
2021Co-Authors: Armin Ebrahimi, Bahram Ghorbani, Fatemeh Skandarzadeh, Masoud ZiabasharhaghAbstract:Abstract Today, using new energy storage systems for peak shaving and load leveling with the approach of maximizing the efficiency of energy systems is inevitable. In the present study, a cogeneration integrated Structure of Power and cooling using liquefied natural gas regasification and solar collectors is developed and analyzed. In this regard, the purposes can be achieved by producing liquid air at an off-peak time and storing it as a cryogenic energy storage system and recovering it on-peak time. This new integrated Structure generates 11.66 MW Power and 4.502 MW cooling at the on-peak time. A Kalina-based combined cooling and Power cycle and a gas turbine Power generation unit are used to generate Power from liquid air. Phase change material is used to store the heat from the compressed air entering the liquefaction stage (at the off-peak time) and recovering it at the on-peak time as the heat source of the Kalina cycle. Also, the solar parabolic trough collector provided with Zahedan climatic conditions the heat required for the direct expansion section. The electrical storage, round-trip, energy storage, and exergy efficiencies of the proposed energy storage system are 57.62%, 45.44%, 79.87%, and 40.17%, respectively. The most exergy destruction belongs to the heat exchangers section, which accounts for 50.85% of the total exergy destruction. One of the important results of the parametric study is the increase of round-trip and electrical storage efficiencies up to 47.59% and 61.60%, respectively, by minimizing the pressure of the inlet air to the liquefaction stage while maximizing the pressure of the liquid air inlet to the Power generation stage.
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introducing a novel integrated cogeneration system of Power and cooling using stored liquefied natural gas as a cryogenic energy storage system
2020Co-Authors: Armin Ebrahimi, Bahram Ghorbani, Masoud ZiabasharhaghAbstract:Abstract Nowadays, it is inevitable to use energy storage systems for peak shaving and load leveling purposes. In the present study, a new integrated Structure of Power generation and refrigeration is developed for the use and recovery of the stored liquid natural gas energy as a cryogenic energy storage system. Kalina Power cycle, molten carbonate fuel cell, carbon dioxide Power cycle, and absorption-compression refrigeration system using solar energy are employed to achieve this goal. This new integrated Structure generates 161,287 kW Power, 1964 kW refrigeration at 266 K through LNG recovery with 4.066 kg/s mass flow rate and 8464 kW refrigeration at 218.5 K. Electrical, thermal and exergy efficiencies of the whole system are 57.92%, 61.66%, and 68.21%, respectively. In the present study, considering the efficiency of the LNG production and storage sector at the off-peak time as well as its cryogenic energy recovery sector at the on-peak time, round-trip efficiency of the proposed cryogenic storage system is calculated as 66.29%. Via the parametric study on major system parameters such as Tu101 and Tu102 turbines inlet pressures, Tu201 turbine outlet temperature, etc., the performance of the system in various conditions is evaluated. Important results of the parametric study include an increase in the system total thermal efficiency up to 70.03% by reducing the outlet temperature of the Tu201 turbine to 880 K.
Andrew Keane - One of the best experts on this subject based on the ideXlab platform.
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visualizing the electrical Structure of Power systems
2017Co-Authors: Paul Cuffe, Andrew KeaneAbstract:Recent work, using electrical distance metrics and concepts from graph theory, has revealed important results about the electrical connectivity of empiric Power systems. Such structural features are not widely understood or portrayed. Power systems are often depicted using unenlightening single-line diagrams, and the results of loadflow calculations are often presented without insightful elucidation, lacking the necessary context for usable intuitions to be formed. For system operators, educators, and researchers alike, a more intuitive and accessible understanding of a Power system's inner electrical Structure is called for. Data visualization techniques offer several paths toward realizing such an ideal. This paper proposes various ways, in which electrical distance might be defined for empiric Power systems, and records how well each candidate distance measure may be embedded in two dimensions. The resulting 2-D projections form the basis for new visualizations of empiric Power systems and offer novel and useful insights into their electrical connectivity and Structure.
