scholarly journals Hydrogen energy system for renewable energy consumption

2021 ◽  
Vol 233 ◽  
pp. 01083
Author(s):  
SONG Jie ◽  
ZHU Yuting ◽  
LIANG Danxi ◽  
CHENG Qing ◽  
YAO Dawei ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Power Systems ◽  
Energy System ◽  
Electric Power Systems ◽  
Primary Energy ◽  
Hydrogen Energy ◽  
Primary Energy Consumption ◽  
Renewable Energy Consumption ◽  
Key Technologies

As a kind of high-quality secondary energy, hydrogen has great potential of application in energy storage and utilization and contributes to consumption of renewable energy in electric power systems. To further increase the proportion of renewable energy in primary energy consumption, this article introduces a hydrogen energy system for renewable energy consumption. In this article, significance and necessity of developing hydrogen energy system are elaborated, the overall structure of hydrogen energy system is presented, key technologies involved with hydrogen system are listed, economical efficiency of hydrogen energy system is analyzed, and development of hydrogen energy system in the future is forecasted.

Unit Commitment Incorporating Wind Generators Considering Emission Reduction

2011 ◽  
Vol 347-353 ◽  
pp. 3973-3977
Author(s):  
Xiao Hua Zhang ◽  
Jin Quan Zhao ◽  
Xing Ying Chen
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Power Systems ◽  
Emission Reduction ◽  
Unit Commitment ◽  
Renewable Energy Sources ◽  
Primary Energy ◽  
Energy Sources ◽  
Primary Energy Consumption ◽  
Wind Generators

The rise of environmental protection and the progressive exhaustion of traditional fossil energy sources have increased the interest in integrating renewable energy sources into existing power systems. The energy saving and emission reduction is of most importance. Wind energy could be one of the most promising renewable energy sources. However, the intermittency and unpredictability of wind power generation creates difficulty in control of frequency and generation scheduling. Many problems will arise in the renewable energy based hybrid power system. In this paper, a fuzzy unit commitment model including wind generators is presented. Primary energy consumption, gas emission and the risk of wind are synthetically considered. Through defining membership function, the deterministic problem is transformed into the fuzzy problem. Then it is reformulated into the nonlinear problem by means of the maximum-minimum fuzzy satisfaction. Improved Genetic Algorithms (IGA) is used to solve the fuzzy optimization problem. The simulation results of a 10-unit system demonstrate that the proposed method is feasible. It can compromise between the primary energy consumption and the risk according to the decision-maker’s will. It provides valuable information in both operational and planning problems in the future.

Power System for Beautiful China

2021 ◽  
Vol 144 ◽  
pp. 14-21
Author(s):  
Vladimir P. Polevanov ◽  
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Natural Gas ◽  
Power System ◽  
Renewable Energy Sources ◽  
Primary Energy ◽  
Energy Resources ◽  
Energy Sources ◽  
Primary Energy Consumption ◽  
Leading Position

The growth in primary energy consumption in 2019 by 1.3% was provided by renewable energy sources and natural gas, which together provided 75% of the increase. China in the period 2010–2020 held a leading position in the growth of demand for energy resources, but according to forecasts, India will join it in the current decade.

scholarly journals Operation Optimization of Regional Integrated Energy System Considering the Responsibility of Renewable Energy Consumption and Carbon Emission Trading

Electronics ◽  
2021 ◽  
Vol 10 (21) ◽  
pp. 2677
Author(s):  
Feng Li ◽  
Shirong Lu ◽  
Chunwei Cao ◽  
Jiang Feng
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Carbon Emission ◽  
Emission Trading ◽  
Energy System ◽  
Low Carbon ◽  
Renewable Energy Consumption ◽  
Operation Optimization ◽  
Integrated Energy System ◽  
Carbon Emission Trading

To “bring carbon emissions to a peak by 2030 and to be carbon-neutral by 2060”, the role of renewable energy consumption and carbon emission trading are promoted. As an important energy consumer of regional energy system, it is necessary for integrated energy system to ensure the low-carbon economic operation of the system. Combined with the responsibility of renewable energy consumption, green certificate trading mechanism, carbon emission rights trading, and China Certified Emission Reduction (CCER), a regional integrated energy system operation optimization model was proposed. The model aims to minimize the total cost of the system, which included with electric bus, thermal bus, and cold bus. Setting different scenarios for the given example, the results show that the optimized model could effectively reduce the operating costs of the system. Moreover, the results also provide an effective reference for the system’s economic and low-carbon operation.

scholarly journals Effect of Energy Storages on Flexibility and Cyber Resilience of Electric Networks

2019 ◽  
Vol 217 ◽  
pp. 01006
Author(s):  
Irina Kolosok ◽  
Elena Korkina ◽  
Victor Kurbatsky
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
Cyber Security ◽  
Large Scale ◽  
Renewable Energy Sources ◽  
Power Production ◽  
Energy System ◽  
Electric Power Systems ◽  
Energy Sources ◽  
Electric Networks

When planning and managing the present-day and future transformed electric power systems (EPS), such comparatively new properties as flexibility and cyber resilience shall be taken into account along with EPS conventional properties, such as Reliability, Security, Survivability, and Vulnerability. Large-scale introduction of renewable energy sources notably lowers the EPS flexibility. Installation of Energy Storages allows compensation of power production imbalance occurred when using renewable energy sources, which makes the energy system more robust, but lowers its cyber security. The paper considers the main performances and models of Energy Storages, their impact on flexibility and cyber security of electric networks; it also presents the technique for quantifying the flexibility of a network with Energy Storages, and identifies most promising directions of studies in this area.

scholarly journals A Review of a Stand-Alone Hydrogen System Application for Private Houses in Greece and the Use of Phase Change Materials in Their Building Construction

2017 ◽  
Author(s):  
Leonidas C. Raptis ◽  
Giouli K. Michalakakou ◽  
Evangelos I. Gkanas ◽  
Sofoklis S. Makridis
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Phase Change ◽  
Phase Change Materials ◽  
Action Plan ◽  
Energy System ◽  
Standard Of Living ◽  
Hydrogen Energy ◽  
Reduce Energy Consumption ◽  
First Time

Energy is a fundamental ingredient in economic development and energy consumption is an index of prosperity and the standard of living. The consumption of energy has increased significantly in the last number of decades, as the standard of living has improved. Renewable energy is a sustainable and clean source of energy derived from nature. Renewable energy technology is one of the solutions, which produces energy by transforming natural resources into useful energy forms. When you do something for the first time in the world, you never attain a perfect product or solution from the start. In Central Greece Lamia city, we are the first to design and implement an off-grid energy system using hydrogen energy storage technology and phase change materials for a house residence. The action plan for energy efficiency, a series of directives and incentive mechanisms, mandatory energy certification of buildings, indicate the urgent need to reduce energy consumption in buildings, which results in a more comfortable living, long service life of buildings, which in turn preserves the environment.

scholarly journals Optimal Management of the Energy Flows of Interconnected Residential Users

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1507 ◽  
Author(s):  
Lucrezia Manservigi ◽  
Mattia Cattozzo ◽  
Pier Ruggero Spina ◽  
Mauro Venturini ◽  
Hilal Bahlawan
Keyword(s):  
Energy Consumption ◽  
Energy Storage ◽  
Energy Systems ◽  
Electrical Energy ◽  
Energy System ◽  
Primary Energy ◽  
Primary Energy Consumption ◽  
Prime Mover ◽  
Operation Strategy ◽  
Electrical Energy Storage

In recent years, residential users have begun to be equipped with micro-CHP (combined heat and power) generation technologies with the aim of decreasing primary energy consumption and reducing environmental impact. In these systems, the prime mover supplies both thermal and electrical energy, and an auxiliary boiler and the national electrical grid are employed as supplementary systems. In this paper, a simulation model, which accounts for component efficiency and energy balance, was developed to replicate the interaction between the users and the energy systems in order to minimize primary energy consumption. The simulation model identified the optimal operation strategy of two residential users by investigating different energy system configurations by means of a dynamic programming algorithm. The reference scenario was compared to three different scenarios by considering independent energy systems, shared thermal and electrical energy storage and also the shared prime mover. Such a comparison allowed the identification of the most suitable energy system configuration and optimized operation strategy. The results demonstrate that the optimized operation strategy smoothes the influence of the size of thermal and electrical energy storage. Moreover, the saving of primary energy consumption can be as high as 5.1%. The analysis of the economic feasibility reveals that the investment cost of the prime mover can be as high as 4000 €/kW.

scholarly journals Study on the Certification Policy of Zero-Energy Buildings in Korea

2020 ◽  
Vol 12 (12) ◽  
pp. 5172 ◽  
Author(s):  
Yeweon Kim ◽  
Ki-Hyung Yu
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Energy Consumption ◽  
Residential Buildings ◽  
Building Energy ◽  
Primary Energy ◽  
Zero Energy ◽  
Renewable Energy Consumption ◽  
Self Sufficiency ◽  
Zero Energy Buildings

This study presents a methodology and process to establish a mandatory policy of zero-energy buildings (ZEBs) in Korea. To determine the mandatory level to acquire the rating of a ZEB in Korea, this study was conducted under the assumption that the criteria of ZEB was a top 5% building considering the building’s energy-efficiency rating, which was certified through a quantitative building energy analysis. A self-sufficiency rate was also proposed to strengthen the passive standard of the buildings as well as to encourage new and renewable energy production. Accordingly, zero-energy buildings (ZEBs) in Korea are defined as having 60 kWh/(m2·yr) of non-renewable primary energy (NRPE) consumption in residential buildings and 80 kWh/(m2·yr) in non-residential buildings, and the self-reliance rate should be more than 20% of the renewable energy consumption as compared to the total energy consumption of the buildings. In addition, the mandatory installation of building energy management systems (BEMS) was promoted to investigate the energy behavior in buildings to be certified as zero-energy in the future. This study also investigated the number of ZEB certificates during the demonstration period from 2017 to 2019 to analyze the energy demand, non-renewable primary energy, renewable primary energy, and self-sufficiency rate as compared to those under the previous standards. For ZEB Grade 1 as compared to the existing building energy-efficiency rating, the sum of the NRPE decreased more than 50%, and renewable energy consumption increased more than four times.

scholarly journals Cost-Benefit Analysis of Hybrid Photovoltaic/Thermal Collectors in a Nearly Zero-Energy Building

Energies ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1582 ◽  
Author(s):  
Conti ◽  
Schito ◽  
Testi
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Electrical Energy ◽  
Energy System ◽  
Primary Energy ◽  
Hot Water ◽  
Solar Thermal ◽  
Primary Energy Consumption ◽  
Solar Thermal Energy ◽  
Zero Energy

This paper analyzes the use of hybrid photovoltaic/thermal (PVT) collectors in nearly zero-energy buildings (NZEBs). We present a design methodology based on the dynamic simulation of the whole energy system, which includes the building energy demand, a reversible heat pump as generator, the thermal storage, the power exchange with the grid, and both thermal and electrical energy production by solar collectors. An exhaustive search of the best equipment sizing and design is performed to minimize both the total costs and the non-renewable primary energy consumption over the system lifetime. The results show that photovoltaic/thermal technology reduces the non-renewable primary energy consumption below the nearly zero-energy threshold value, assumed as 15 kWh/(m2·yr), also reducing the total costs with respect to a non-solar solution (up to 8%). As expected, several possible optimal designs exist, with an opposite trend between energy savings and total costs. In all these optimal configurations, we figure out that photovoltaic/thermal technology favors the production of electrical energy with respect to the thermal one, which mainly occurs during the summer to meet the domestic hot water requirements and lower the temperature of the collectors. Finally, we show that, for a given solar area, photovoltaic/thermal technology leads to a higher reduction of the non-renewable primary energy and to a higher production of solar thermal energy with respect to a traditional separate production employing photovoltaic (PV) modules and solar thermal (ST) collectors.

scholarly journals Integrated Energy Multi-Objective Operation Optimization

2020 ◽  
Vol 185 ◽  
pp. 01067
Author(s):  
Zhao Liu ◽  
Mengjin Hu ◽  
Xianlong Zhao ◽  
Yongli Wang ◽  
Suhang Yao ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Energy Flow ◽  
Energy System ◽  
Demand Side ◽  
Renewable Energy Consumption ◽  
Operation Optimization ◽  
Integrated Energy System ◽  
System Energy ◽  
Demand Side Response

The Integrated Energy System (IES) offers a new approach to the energy dilemma. It introduces demand-side response into the Regional Integrated Energy System (RIES) and proposes an operational optimization model considering Integrated Demand Side Response (IDSR) in the framework of RIES. First of all, the typical cold\thermal\electric RIES is used as a framework to establish the multi-energy flow model of RIES based on the energy flow relationships among energy production, conversion and consumption. Then, from the perspective of energy transfer, the potential to enhance renewable energy consumption by carrying out RIES to transfer the system energy flow is analyzed. Finally, the RIES operation optimization model considering IDSR is established with the goal of the economy of system operation, considering the system energy balance and the operating constraints of each energy device, and the solution algorithm is designed. Taking the RIES in a certain region as an example, the proposed method and model were verified computationally, and the results showed that IDR can effectively improve system economics and increase the level of renewable energy consumption.

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