Најголемата сончева централа на светот започна со производство на првите kWh

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   Максим Гонев

   февруари 20, 2014 at 1:09 am

   Почитувани ,

   Ова се два написа за кои треба да се заинтересираат развојните служби на “ЕЛЕМ “ , а со кои се решава проблемот на РЕК Битола и битолчани.

   Поздрав,
   инж. Максим Гонев

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   Evaluation of the Use of Different Combinations of Solar Add-ons with Coal Fired Power Plants

   ABSTRACT

   The various types of concentrating solar power (CSP) technology will play an important role in the future generation of electricity, heat and cooling. A promising way to implement this technology is the combination of CSP with existing or newly built fossil fuel fired power plants. In these hybrid plants, the solar add-on saves fuel by taking over a part of the steam supply of the conventional plant that is normally supplied by fossil fuel. It may also increase the peak load capability.

   In this paper, the example of a linear Fresnel collector from the Solar Power Group is used to investigate the influence of solar add-ons that generate superheated steam on the overall performance of a regular coal fired power plant. A solar field that is supplying steam to the pre-heating stages of the power block reduces extraction of steam from the turbine. This leads either to a higher electric output of the system or to the saving of fuel if the output is kept constant. The most relevant effects are observed in the electrical efficiency and in fuel consumption.

   The focus of the investigation is on the impact of the entry point on the conventional water/steam cycle and the potential of using several points of supply for solar steam. The impact of lessening bleed extractions during high direct normal irradiance (DNI) hours is simulated for a 350 MW coal fired power plant operating at selected locations in the USA and Australia.

   The thermodynamic performance and potential to save fossil fuel – and thereby reduce the carbon footprint of power generation – of different combinations of solar steam management are analyzed. This paper describes and evaluates the expected economic benefits in terms of a strategic tariff system, integrating a feed-in tariff with the potential revenues from fuel savings and avoided carbon dioxide (CO2) emissions. The generation costs and the internal rate of return (IRR) set a reference from which a project- pecific adjustment of the feed-in tariff can be made.

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   First ever hybrid solar-coal power plant operating
   Jul 12, 2010 by Lin Edwards

   Colorado Integrated Solar Project

   Read more at: https://phys.org/news198135102.html#jCp

   (PhysOrg.com) — The first ever hybrid solar-coal power plant is now operating at Unit 2 of the Cameo Generating Station near Palisade in Colorado. The demonstration project was built by Xcel Energy as part of its new Innovative Clean Technology (ICT) Program, and is designed to decrease the use of coal, increase the plant’s efficiency, lower carbon dioxide emissions, and test the commercial viability of combining the two technologies.
   (PhysOrg.com) — The first ever hybrid solar-coal power plant is now operating at Unit 2 of the Cameo Generating Station near Palisade in Colorado. The demonstration project was built by Xcel Energy as part of its new Innovative Clean Technology (ICT) Program, and is designed to decrease the use of coal, increase the plant’s efficiency, lower carbon dioxide emissions, and test the commercial viability of combining the two technologies.
   The project was developed by Xcel Energy in conjunction with Abengoa Solar, which developed the solar parabolic trough technology that concentrates solar energy to produce heat. The demonstration project is expected to cut the use of coal at the power plant by around two or three percent, and could be scaled up to cut it by 10 percent.
   The system works through a series of parabolic trough solar collectors made of glass mirrors. On sunny days the mirrors concentrate the solar radiation onto a line of receiver tubes filled with a heat transfer fluid (mineral oil). The solar energy heats the circulating oil to about 300°C (575°F). The heated oil is then fed to a heat exchanger where the heat is transferred to water to heat it to around 200°C (407°F) before it enters the boiler. Having hotter water entering the boiler means less coal is needed to heat it and produce the steam that turns the turbine to generate electricity.
   Vice president of Xcel Energy, and chief supply officer, Kent Larson, said in a press release that if the project meets expectations it may help “move the use of solar energy one step closer to being a potential technology for improving the environmental performance of coal-fired power plants.”
   CEO of Abengoa Solar, Santiage Seage, said the company believed the solar-coal combination would provide a cost-effective way of delivering solar energy.

   Xcel Energy’s ICT Program is aimed at developing, commercializing and deploying new technologies for electricity generation, energy storage, and so on, to support the company’s clean energy strategy. Xcel Energy is a major utility company in the US, servicing 3.3 million electricity customers and 1.8 million natural gas customers.
   Other companies are also developing or evaluating hybrid power generation plants to see if the combination can provide environmental benefits at a commercially viable cost. For example a group or companies have joined with the Electric Power Research Institute to study the feasibility of hybrid coal-solar plants in North Carolina and New Mexico, while in Florida NextEra Energy is developing a hybrid solar-natural gas plant.

   Read more at: https://phys.org/news198135102.html#jCp

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