Thermal power station
About: Thermal power station is a(n) research topic. Over the lifetime, 17479 publication(s) have been published within this topic receiving 168629 citation(s). The topic is also known as: dimnijak.
25 Sep 2009-Science
TL;DR: Amine scrubbing has been used to separate carbon dioxide (CO2) from natural gas and hydrogen since 1930 and is ready to be tested and used on a larger scale for CO2 capture from coal-fired power plants.
Abstract: Amine scrubbing has been used to separate carbon dioxide (CO2) from natural gas and hydrogen since 1930. It is a robust technology and is ready to be tested and used on a larger scale for CO2 capture from coal-fired power plants. The minimum work requirement to separate CO2 from coal-fired flue gas and compress CO2 to 150 bar is 0.11 megawatt-hours per metric ton of CO2. Process and solvent improvements should reduce the energy consumption to 0.2 megawatt-hour per ton of CO2. Other advanced technologies will not provide energy-efficient or timely solutions to CO2 emission from conventional coal-fired power plants.
01 Jan 2004-Progress in Energy and Combustion Science
Abstract: In this paper a survey of the various types of solar thermal collectors and applications is presented. Initially, an analysis of the environmental problems related to the use of conventional sources of energy is presented and the benefits offered by renewable energy systems are outlined. A historical introduction into the uses of solar energy is attempted followed by a description of the various types of collectors including flat-plate, compound parabolic, evacuated tube, parabolic trough, Fresnel lens, parabolic dish and heliostat field collectors. This is followed by an optical, thermal and thermodynamic analysis of the collectors and a description of the methods used to evaluate their performance. Typical applications of the various types of collectors are presented in order to show to the reader the extent of their applicability. These include solar water heating, which comprise thermosyphon, integrated collector storage, direct and indirect systems and air systems, space heating and cooling, which comprise, space heating and service hot water, air and water systems and heat pumps, refrigeration, industrial process heat, which comprise air and water systems and steam generation systems, desalination, thermal power systems, which comprise the parabolic trough, power tower and dish systems, solar furnaces, and chemistry applications. As can be seen solar energy systems can be used for a wide range of applications and provide significant benefits, therefore, they should be used whenever possible.
01 May 1995-Fuel
Abstract: This paper reviews the costs and technologies involved in an integrated system for the production of electricity from biomass in general and wood in particular. It first examines the economics of gasification, showing that the potential for this form of renewable energy lies in either processing low-cost wastes or relying on some sort of fiscal incentive, even at relatively large scales of operation and with high-efficiency processes. The paper then considers all the elements required with respect to wood handling and preparation, gasification, gas quality and gas cleaning, and establishes the criteria for their selection for delivery of a clean gas to a gas turbine or engine. Special emphasis has been placed on the technology status and key uncertainties that are considered to be crucial to the success or failure of a biomass-based IGCC system. The main conclusions are that wood handling, storage, drying, comminution and screening are well established and present no uncertainties in operation and performance. The technology of biomass gasifiers is sufficiently advanced to justify a substantial demonstration plant to prove the total IGCC concept and obtain reliable performance data. There are still areas of uncertainty, but these are relatively minor and will not be resolved until and unless a large integrated plant is built. Gas cleaning has been successfully developed in laboratories to the point where large-scale demonstration and long-term operating experience are necessary. This area can be considered the least developed and most likely to create problems in a demonstration plant. Turbine and turbine fuel specifications are imperfectly defined, although engines are known to be more tolerant of contaminated fuel gas.
01 Feb 2015-Earth-Science Reviews
Abstract: Coal fly ash, an industrial by-product, is derived from coal combustion in thermal power plants. It is one of the most complex anthropogenic materials, and its improper disposal has become an environmental concern and resulted in a waste of recoverable resources. There is a pressing and ongoing need to develop new recycling methods for coal fly ash. The present review first describes the generation, physicochemical properties and hazards of coal fly ash at the global level, and then focuses on its current and potential applications, including use in the soil amelioration, construction industry, ceramic industry, catalysis, depth separation, zeolite synthesis, etc. Finally, the advantages and disadvantages of these applications, the mode of fly ash utilization worldwide and directions for future research are considered.
01 Sep 2007-Energy Policy
Abstract: CO2 capture and storage (CCS) is receiving considerable attention as a potential greenhouse gas (GHG) mitigation option for fossil fuel power plants. Cost and performance estimates for CCS are critical factors in energy and policy analysis. CCS cost studies necessarily employ a host of technical and economic assumptions that can dramatically affect results. Thus, particular studies often are of limited value to analysts, researchers, and industry personnel seeking results for alternative cases. In this paper, we use a generalized modeling tool to estimate and compare the emissions, efficiency, resource requirements and current costs of fossil fuel power plants with CCS on a systematic basis. This plant-level analysis explores a broader range of key assumptions than found in recent studies we reviewed for three major plant types: pulverized coal (PC) plants, natural gas combined cycle (NGCC) plants, and integrated gasification combined cycle (IGCC) systems using coal. In particular, we examine the effects of recent increases in capital costs and natural gas prices, as well as effects of differential plant utilization rates, IGCC financing and operating assumptions, variations in plant size, and differences in fuel quality, including bituminous, sub-bituminous and lignite coals. Our results show higher power plant and CCS costs than prior studies as a consequence of recent escalations in capital and operating costs. The broader range of cases also reveals differences not previously reported in the relative costs of PC, NGCC and IGCC plants with and without CCS. While CCS can significantly reduce power plant emissions of CO2 (typically by 85–90%), the impacts of CCS energy requirements on plant-level resource requirements and multi-media environmental emissions also are found to be significant, with increases of approximately 15–30% for current CCS systems. To characterize such impacts, an alternative definition of the ‘‘energy penalty’’ is proposed in lieu of the prevailing use of this term. r 2007 Elsevier Ltd. All rights reserved.