scholarly journals Allocating Output Electricity in a Solar-Aided Coal-Fired Power Generation System and Assessing Its CO2 Emission Reductions in China

2020 ◽  
Vol 12 (2) ◽  
pp. 673 ◽  
Author(s):  
Jun Zhao ◽  
Kun Yang
Keyword(s):  
Power Generation ◽  
Solar Energy ◽  
Power System ◽  
Financial Support ◽  
Co2 Emission ◽  
Government Regulation ◽  
Solar Thermal Energy ◽  
Coal Consumption ◽  
Emission Reductions ◽  
The Government

Coal-fired power generation in China is facing huge challenges due to its high share in the total electricity generation and its environmental problems. A solar-aided coal-fired power generation (SACPG) system, based on the integration of solar thermal energy into a conventional coal-fired power system, is an effective way to utilize solar energy and reduce coal consumption. The reasonable allocation of output electricity to solar energy and coal in a SACPG system and the evaluation of its CO2 emission reductions can help to acquire subsidies or financial support granted to renewable electricity and CO2 emission reductions. A methodology is proposed from the view of the technical characteristics of a SACPG system and the government regulation. The coal-to-electricity efficiency of the baseline unit or the coal-fired power system in a SACPG system is the key factor in the methodology, and it can be calculated on the basis of the norm of energy consumption of coal-fired power units in China. Then, the allocation of the output electricity to solar energy and coal can be calculated, and so can the CO2 emission reductions by the solar-coal hybrid system. Taking a 600 MW SACPG system as an example, the methodology is further illustrated. The methodology can guarantee that the calculation of output electricity allocation in a SACPG system and the calculation of its CO2 emission reductions are accurate, conservative and transparent for its subsidies or financial support.

scholarly journals Analysis of CO2 Abatement Cost of Solar Energy Integration in a Solar-Aided Coal-Fired Power Generation System in China

2020 ◽  
Vol 12 (16) ◽  
pp. 6587
Author(s):  
Jun Zhao ◽  
Kun Yang
Keyword(s):  
Power Generation ◽  
Solar Energy ◽  
Power System ◽  
Thermal Energy ◽  
Solar Power ◽  
Abatement Cost ◽  
Solar Thermal ◽  
Energy Integration ◽  
Solar Thermal Energy ◽  
Carbon Abatement

Utilization of renewable energy, improvement of power generation efficiency, and reduction of fossil fuel consumption are important strategies for the Chinese power industry in response to climate change and environment challenges. Solar thermal energy can be integrated into a conventional coal-fired power unit to build a solar-aided coal-fired power generation (SACPG) system. Because solar heat can be used more efficiently in a SACPG system, the solar-coal hybrid power system can reduce coal consumption and CO2 emissions. The performance and costs of a SACPG system are affected by the respective characteristics of its coal-fired system and solar thermal power system, their coupling effects, the solar energy resource, the costs of the solar power system, and other economic factors of coal price and carbon price. According to the characteristics of energy saving and CO2 emission reductions of a SACPG system, a general methodology of CO2 abatement cost for the hybrid system is proposed to assess the solar thermal energy integration reasonably and comprehensively. The critical factors for carbon abatement cost are also analyzed. Taking a SACPG system of 600 MW in Jinan, Shandong and in Hohhot, Inner Mongolia in China as an example, the methodology is further illustrated. The results show that the efficiency of solar heat-to-electricity should be high and it is 0.391 in the scheme of SIH1 in Hohhot, and that the designed direct normal irradiation (DNI) should be greater than 800 W/m2 in order to make full use of solar energy resources. It is indicated that the abatement cost of a SACPG system depends significantly both on the cost of solar power system and its relevant costs, and also on the fuel price or the carbon prices, and that the carbon abatement cost can be greatly reduced as the coal prices or CO2 price increase. The methodology of carbon abatement cost can provide support for the comprehensive assessment of a SACPG system for its design and optimal performance.

Solar energy and regional coordination as a feasible alternative to the 'Battery of Asia' plan

2021 ◽  
Author(s):  
Kais Siala ◽  
A.F.M. Kamal Chowdhury ◽  
Thanh Dang ◽  
Stefano Galelli
Keyword(s):  
Solar Energy ◽  
Power System ◽  
Co2 Emission ◽  
System Capacity ◽  
Solar Pv ◽  
Cross Border ◽  
Regional Coordination ◽  
Power Trading ◽  
Centralized Planning ◽  
Feasible Alternative

Abstract Strategic dam planning and the deployment of decentralized renewable technologies are two elements of the same problem, yet they are normally addressed in isolation. Here, we show that an integrated view of the power system capacity expansion problem could have transformative effects for the 'Battery of Asia' plan. We demonstrate that Thailand, Laos, and Cambodia have tangible opportunities for meeting projected electricity demand and CO2 emission targets with less hydropower than currently planned--options range from halting the construction of all dams in the Lower Mekong to building 82% of the planned ones. The key enabling strategies for these options to succeed are solar PV and regional coordination, expressed in the form of centralized planning and cross-border power trading. The alternative expansion plans would slightly increase the cumulative costs, but limit the fragmentation of additional river reaches, thereby offering more sustainable pathways for the Mekong’s ecosystems and riparian people.

Power Generation from Coal Gangue in China: Current Status and Development

2012 ◽  
Vol 550-553 ◽  
pp. 443-446 ◽  
Author(s):  
Jiang Long Yu ◽  
Fang Rui Meng ◽  
Xian Chun Li ◽  
Arash Tahmasebi
Keyword(s):  
Power Generation ◽  
Government Regulation ◽  
Thermal Power ◽  
Coal Gangue ◽  
Current Status ◽  
Particulate Matter Emission ◽  
The Government ◽  
Efficient Power ◽  
Plant Efficiency

This paper provides an overview on the current status of power generation in China using coal gangue. The government regulation towards the use of coal gangue for power generation is introduced. Emission of pollutants and low thermal power plant efficiency are the two major problems for the power industry firing coal gangue. Particulate matter emission control is a problem due to the high ash content. Sulfur emissions from these units are easily controlled mostly through lime/limestone injection and in-situ capture. Overall, efficient power generation using coal gangue is a promising approach to reduce the use of coal resources and reduce the environmental impacts.

The Research on Solar Cells Based on Improving Conversion Efficiency

2015 ◽  
Vol 730 ◽  
pp. 173-177
Author(s):  
Yu Wen Tang
Keyword(s):  
Power Generation ◽  
Solar Cells ◽  
Solar Cell ◽  
Solar Energy ◽  
Conversion Efficiency ◽  
Photovoltaic Effect ◽  
New Technology ◽  
Electrical Energy ◽  
Solar Thermal Energy ◽  
Photovoltaic Power

Solar energy is an inexhaustible and renewable energy without environmental pollution. Solar energy can be used in three kinds of forms: solar thermal energy, photochemical conversion and photovoltaic power generation. Among these, the final form of photovoltaic power generation is electricity which can be transported, applied and stored conveniently. On the basis of photovoltaic effect, solar cell is developed as a new technology to convert light energy into electrical energy using semiconductor. Up to now the two key problems of the development of solar cells are how to improve the conversion efficiency and reduce cost. Therefore, the material and production technology used for solar cells are discussed based on improving conversion efficiency in this article.

Potential of Solar Thermal Energy for CCHP Systems

2009 ◽  
Author(s):  
Nelson Fumo ◽  
Louay M. Chamra ◽  
Vicente Bortone
Keyword(s):  
Energy Consumption ◽  
Solar Energy ◽  
Thermal Energy ◽  
Co2 Emission ◽  
Waste Heat ◽  
Energy Systems ◽  
Primary Energy ◽  
Solar Thermal ◽  
Solar Collectors ◽  
Solar Thermal Energy

Integrated energy systems combine distributed power generation with thermally activated components to use waste heat, improving the overall energy efficiency, and making better use of fuels. Use of solar thermal energy is attractive to improve combined cooling, heating, and power (CCHP) systems performance, particularly during summer time since the cooling load coincides very well with solar energy availability. Limitation of the use of solar systems is mainly related to high first cost and large surface area for solar energy harvesting. Therefore, solar thermal CCHP systems seem to be an alternative to increase the use of solar thermal energy as a means to increase energy systems overall efficiency and reduce greenhouse gases (GHGs) emissions. This study focuses on the use of solar collectors in CCHP systems in order to reduce PEC and emission of CO2 in office buildings. By using a base CCHP system, the energy and economic analysis are presented as the contribution of the solar system from the baseline. For comparison purposes, the analysis is made for the cities of Minneapolis (MN), Chicago (IL), New York (NY), Atlanta (GA), and Fort Worth (TX). Results show that solar thermal CCHP systems can effectively reduce the fuel energy consumption from the boiler. The potential of solar collectors in CCHP systems to reduce PEC and CO2 emission increases with the cooling demand; while the effectiveness of solar collectors to reduce primary energy consumption and CO2 emission, and the ability of the system to pay by itself from fuel savings, decreases with the number of solar collectors.

Study of a Hybrid Wind and Solar Energy Power System

2013 ◽  
Vol 316-317 ◽  
pp. 28-31
Author(s):  
Hui Yong Chen ◽  
Qiang Zhang ◽  
Qin Zhou ◽  
Yong Hui Xie
Keyword(s):  
Power Generation ◽  
Solar Energy ◽  
Power System ◽  
Hybrid System ◽  
Power Plants ◽  
Operating Time ◽  
Social Benefit ◽  
Combined Cycle ◽  
Oil Consumption ◽  
The Difference

A new kind of hybrid wind and solar energy power system was proposed in this paper. In the hybrid system, the technologies of compressed air energy storage (CAES), solar heat storage and gas-steam combined cycle power generation were combined together. At same oil consumption of 19.48 t/h, the output power of the hybrid system in the paper was 194.69 MW, while that of the conventional gas-steam combined cycle was 103.15 MW. The difference between the two cycles was 91.54 MW, which was equivalent to the amount of wind and solar energy power generation. When annual effective operating time of the hybrid system was 2600 h, the power output of wind and solar energy power generation reached 238 million kW•h. If coal-fired power plants were taken as the reference standard, about 113,050 tons of coal was saved per year. An overall benefit of Ұ604.28~626.01 million was obtained per year. As a result, a good economic, environmental and social benefit was achieved.

scholarly journals Molecular Solar Thermal Power Generation

2020 ◽  
Author(s):  
Zhihng Wang ◽  
Zhiyu Hu ◽  
Erzhen Mu ◽  
Zhao-Yang Zhang ◽  
Martyn Jevric ◽  
...  
Keyword(s):  
Power Generation ◽  
Solar Energy ◽  
Photophysical Properties ◽  
New Technology ◽  
Thermal Power ◽  
Electrical Power ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Liquid Form ◽  
Thermal Power Generation

Harvesting solar energy into electrical power can be an attractive way for the development of cleaner energy. However, traditional solar photovoltaic technologies operate strongly dependent on solar intermittency. Molecular solar thermal energy storage (MOST) is a new technology based on photoswitchable materials, which allow sunlight to be stored and released as chemical energy on-demand. We here characterized the photophysical properties of two MOST couples both in liquid and phase interconvertible neat film. Their suitable MOST properties let us combine them individually with a microelectromechanical ultrathin thermoelectric chip to use the stored solar energy for electrical power generation. The generator can produce a surface output power up to 1.2 mW·m<sup>-2</sup> for the liquid form and 0.6 mW·m<sup>-2</sup> for the neat film form. Our results demonstrated that such a molecular thermal power generation system has a high potential to store and transfer solar power into electricity, and is thus independent of geographical restrictions.

Fabrication of a Microstructure-Enhanced Surface Area Solar Thermal Collector

2012 ◽  
Author(s):  
E. Ogbonnaya ◽  
S. Chukwu ◽  
D. Wood ◽  
L. Weiss
Keyword(s):  
Power Generation ◽  
Energy Harvesting ◽  
Solar Energy ◽  
Surface Area ◽  
Thermal Energy ◽  
Large Scale ◽  
Incident Radiation ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Enhanced Surface

Solar energy is a renewable and sustainable energy source that has a promising potential for the rapidly growing energy demands across the world. Large scale power generation from the energy of the sun is well established utilizing both direct thermal energy conversion and conversion to electricity via photovoltaic processes. Solar thermal systems have been limited to macro systems, even though they operate at higher efficiency compared to photovoltaic systems. Solar energy harvesting requires the use of collector plates to capture incident radiation. The surface area exposed to incident radiation is critical in solar thermal energy harvesting. In this work, we have integrated micro technology processes and solar thermal energy to design and fabricate a micro solar thermal system for power generation. This work specifically examined surface area enhancement using MEMS-based techniques to maximize solar thermal absorption. Selective absorber coating and enhanced surface areas due to the incorporation of micro structures on the collector substrates were utilized. In this manner, an important component to an autonomous micro power supply is investigated. Advanced microfabrication and electrochemical deposition techniques were employed to generate a selective absorber surface with enhanced surface area on a silicon substrate. Microchannels were used to enhance the surface area on the substrate. The selective absorber coating consists of a bimetallic structure consisting of tin and nickel.

scholarly journals Molecular Solar Thermal Power Generation

2020 ◽  
Author(s):  
Zhihng Wang ◽  
Zhiyu Hu ◽  
Erzhen Mu ◽  
Zhao-Yang Zhang ◽  
Martyn Jevric ◽  
...  
Keyword(s):  
Power Generation ◽  
Solar Energy ◽  
Photophysical Properties ◽  
New Technology ◽  
Thermal Power ◽  
Electrical Power ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Liquid Form ◽  
Thermal Power Generation

Harvesting solar energy into electrical power can be an attractive way for the development of cleaner energy. However, traditional solar photovoltaic technologies operate strongly dependent on solar intermittency. Molecular solar thermal energy storage (MOST) is a new technology based on photoswitchable materials, which allow sunlight to be stored and released as chemical energy on-demand. We here characterized the photophysical properties of two MOST couples both in liquid and phase interconvertible neat film. Their suitable MOST properties let us combine them individually with a microelectromechanical ultrathin thermoelectric chip to use the stored solar energy for electrical power generation. The generator can produce a surface output power up to 1.2 mW·m<sup>-2</sup> for the liquid form and 0.6 mW·m<sup>-2</sup> for the neat film form. Our results demonstrated that such a molecular thermal power generation system has a high potential to store and transfer solar power into electricity, and is thus independent of geographical restrictions.

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