scholarly journals Solar Preheating in Power Plants: An Overview Of The Current State Of The Technology

2021 ◽  
Vol 1 (1) ◽  
pp. 10-15
Author(s):  
Ziyu Chen ◽  
Dengyu Ba ◽  
Kehui zhuang
Keyword(s):  
Solar Energy ◽  
Carbon Dioxide Emissions ◽  
Power Plants ◽  
Thermal Power ◽  
Thermal Power Plants ◽  
Current State ◽  
Applied Technology ◽  
Current Article ◽  
Overall Efficiency ◽  
Storage Units

Utilizing preheating units is one of the most critical ways to improve the performance of thermal power plants. Increasing the overall efficiency of Brayton or Rankine cycles by preheating the air or stream may result in considerable increases in output power and efficiency. When it comes to renewable energy, solar energy is an appealing alternative for use as a source of preheating since it is readily accessible. The current article discusses the use of solar energy for preheating air and steam in thermal power plants, as well as other uses. The performance of the systems is being improved, according to evaluations, as a result of a variety of elements, including the configuration of the reference system, the operating environment, the applied technology, and so on. Aside from improving the overall efficiency of the power plant, the incorporation of a solar preheating system may significantly decrease fuel usage and, as a result, carbon dioxide emissions. Furthermore, owing to the unavailability of solar energy during the night and overcast hours, thermal storage units may improve the system's dependability while also increasing the contribution of solar energy to the system's output.

scholarly journals Current state and forecast of sulfur dioxide and dust emissions at thermal power plants of Ukraine

2020 ◽  
pp. 87-93
Author(s):  
I. A Volchyn ◽  
L. S Haponych ◽  
W. Ja Przybylski
Keyword(s):  
Sulfur Dioxide ◽  
Power Plants ◽  
Thermal Power ◽  
Emission Factors ◽  
Pollutant Emissions ◽  
Thermal Power Plants ◽  
Dust Emissions ◽  
Current State ◽  
Heat Value ◽  
Specific Emissions

Purpose. Analysing the current state of sulfur dioxide and dust emissions from coal combustion at thermal power plants of Ukraine, predicting them with regard to changes which have occurred in the Ukrainian power industry over the last years, and estimating these emissions to compare with the limit gross emission values of pollutants according to the National Emissions Reduction Plan. Methodology. The method for calculating the pollutant emissions is elaborated, based on using the quantity of produced or supplied electricity for each year of TPP operation. Findings. It has been established that the gross emissions of SO2 at Ukrainian TPPs over the last years have amounted to about 620 thousand tons, and those of dust have made 140 thousand tons. In 2019, the average emission factors for all types of coal were 1180 g/GJ (for sulfur dioxide) and 288 g/GJ (for dust). The average values of specific emissions of SO2 and dust were 14.4 and 3.4g/kWh of supplied electricity, respectively, as compared with 1.2 and 0.2 g/kWh, which are characteristic of the current level at coal TPPs of the EU countries. Originality. Analytic dependency has been established between SO2 emission factors in flue gas at coal TPPs and low heat value and sulfur and ash content for Ukrainian energy coal. Practical value. The developed method allows one to perform calculations of maximum permissible and predicted gross emissions of SO2 and dust at TPPs of Ukraine.

scholarly journals A clustering approach for the analysis of solar energy yields: A case study for concentrating solar thermal power plants

2016 ◽  
Author(s):  
Carlos M. Fernández Peruchena ◽  
Javier García-Barberena ◽  
María Vicenta Guisado ◽  
Martín Gastón
Keyword(s):  
Solar Energy ◽  
Power Plants ◽  
Thermal Power ◽  
Solar Thermal ◽  
Thermal Power Plants ◽  
Solar Thermal Power ◽  
Clustering Approach

scholarly journals Carbon Dioxide Emissions from Thermal Power Plants in Cameroon: A Case Study in Dibamba Power Development Company

2013 ◽  
Vol 04 (04) ◽  
pp. 35-40 ◽  
Author(s):  
Jean Gaston Tamba ◽  
Francis Djanna Koffi ◽  
Louis Monkam ◽  
Simon Koumi Ngoh ◽  
Serge Nyobe Biobiongono
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emissions ◽  
Power Plants ◽  
Thermal Power ◽  
Thermal Power Plants ◽  
Power Development

scholarly journals Repowering of Thermal Power Plants by Means of a Closed Cycle MHD Topper

1990 ◽  
Author(s):  
Oreste Bellofatto ◽  
Carlo A. Borghi
Keyword(s):  
Combustion Product ◽  
Power Plants ◽  
Thermal Power ◽  
Electrical Power ◽  
Thermal Power Plants ◽  
Closed Cycle ◽  
Percentage Points ◽  
Generating Capacity ◽  
Overall Efficiency ◽  
Mhd Channel

A repowering approach of existing thermal power plants through closed cycle MHD toppers is presented in this note. In order to maintain the generating capacity of the steam unit at its nominal value, a modification of the boiler allowing an increase of the combustion product mass flow of 1.6–1.8, is calculated. The high value of the electrical power density, when compared with the thermal losses, obtained by the MHD channel indicates that this system is suitable for small/medium scale plants. An electrical power generated by the retrofitted plant of about 2 time the value of the existing unit and a gain in overall efficiency of 5–8 percentage points are obtained.

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