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Krzywanski J, Sztekler K, Szubel M, Siwek T, Nowak W, Mika Ł. A Comprehensive Three-Dimensional Analysis of a Large-Scale Multi-Fuel CFB Boiler Burning Coal and Syngas. Part 1. The CFD Model of a Large-Scale Multi-Fuel CFB Combustion. Entropy (Basel) 2020; 22:E964. [PMID: 33286733 PMCID: PMC7597258 DOI: 10.3390/e22090964] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/27/2020] [Accepted: 08/27/2020] [Indexed: 01/02/2023]
Abstract
The paper is focused on the idea of multi-fuel combustion in a large-scale circulating fluidized bed (CFB) boiler. The article discusses the concept of simultaneous coal and syngas combustion. A comprehensive three-dimensional computational fluid dynamics (CFD) model is developed, which allows us to describe complex phenomena that occur in the combustion chamber of the CFB boiler burning coal and syngas produced from coal sludge.
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Affiliation(s)
- Jaroslaw Krzywanski
- Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, al.Armii Krajowej 13/15, 42-200 Czestochowa, Poland
| | - Karol Sztekler
- Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland; (K.S.); (M.S.); (T.S.); (W.N.); (Ł.M.)
| | - Mateusz Szubel
- Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland; (K.S.); (M.S.); (T.S.); (W.N.); (Ł.M.)
| | - Tomasz Siwek
- Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland; (K.S.); (M.S.); (T.S.); (W.N.); (Ł.M.)
| | - Wojciech Nowak
- Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland; (K.S.); (M.S.); (T.S.); (W.N.); (Ł.M.)
| | - Łukasz Mika
- Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland; (K.S.); (M.S.); (T.S.); (W.N.); (Ł.M.)
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Sztekler K, Kalawa W, Mlonka-Medrala A, Nowak W, Mika Ł, Krzywanski J, Grabowska K, Sosnowski M, Debniak M. The Effect of Adhesive Additives on Silica Gel Water Sorption Properties. Entropy (Basel) 2020; 22:e22030327. [PMID: 33286102 PMCID: PMC7516784 DOI: 10.3390/e22030327] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/11/2020] [Accepted: 03/11/2020] [Indexed: 11/16/2022]
Abstract
Adsorption chillers are characterized by low electricity consumption, lack of moving parts, and high reliability. The disadvantage of these chillers is their large weight due to low adsorbent sorption capacity. Therefore, the attention is turned to finding a sorbent with a high water sorption capacity and enhanced thermal conductivity to increase chiller efficiency. The article discusses the impact of selected adhesives used for the production of an adsorption bed in order to improve heat exchange on its surface. Experiments with silica gel with three commercial types of glue on metal plates representing heat exchanger were performed. The structure of samples was observed under a microscope to determine the coverage of adsorbent by glue. To determine the kinetics of the free adsorption, the amounts of moisture adsorbed and the desorption dynamics the prepared samples of coated bed on metal plates were moisturized and dried in a moisture analyzer. Samples made of silica gel mixed with the adhesive 2-hydroxyethyl cellulose, show high adsorption capacity, low dynamic adsorption, and medium dynamic desorption. Samples containing adhesive poly(vinyl alcohol) adsorb less moisture, but free adsorption and desorption were more dynamic. Samples containing the adhesive hydroxyethyl cellulose show lower moisture capacity, relatively dynamic adsorption, and lower dynamic desorption.
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Affiliation(s)
- Karol Sztekler
- Faculty of Energy and Fuels, AGH University of Science and Technology, A. Mickiewicza Av.30, 30-059 Krakow, Poland; (W.K.); (A.M.-M.); (W.N.); (Ł.M.)
- Correspondence:
| | - Wojciech Kalawa
- Faculty of Energy and Fuels, AGH University of Science and Technology, A. Mickiewicza Av.30, 30-059 Krakow, Poland; (W.K.); (A.M.-M.); (W.N.); (Ł.M.)
| | - Agata Mlonka-Medrala
- Faculty of Energy and Fuels, AGH University of Science and Technology, A. Mickiewicza Av.30, 30-059 Krakow, Poland; (W.K.); (A.M.-M.); (W.N.); (Ł.M.)
| | - Wojciech Nowak
- Faculty of Energy and Fuels, AGH University of Science and Technology, A. Mickiewicza Av.30, 30-059 Krakow, Poland; (W.K.); (A.M.-M.); (W.N.); (Ł.M.)
| | - Łukasz Mika
- Faculty of Energy and Fuels, AGH University of Science and Technology, A. Mickiewicza Av.30, 30-059 Krakow, Poland; (W.K.); (A.M.-M.); (W.N.); (Ł.M.)
| | - Jaroslaw Krzywanski
- Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Armii Krajowej 13/15, 42-200 Czestochowa, Poland; (J.K.); (K.G.); (M.S.)
| | - Karolina Grabowska
- Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Armii Krajowej 13/15, 42-200 Czestochowa, Poland; (J.K.); (K.G.); (M.S.)
| | - Marcin Sosnowski
- Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Armii Krajowej 13/15, 42-200 Czestochowa, Poland; (J.K.); (K.G.); (M.S.)
| | - Marcin Debniak
- Innogy Polska S.A. ul. Wlodarzewska 68 02-384 Warszawa, Poland
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Sztekler K, Kalawa W, Nowak W, Stefański S, Krzywański J, Grabowska K, Mika Ł. Possibility of use adsorption chillers for increase efficiency in conventional power plant. EPJ Web Conf 2019. [DOI: 10.1051/epjconf/201921302082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Long-term forecasts indicate that the annual increases in electricity demand by 2030 will be approx. 2 ÷ 3% a year. At present, 40% of the world's electricity is produced using coal-fired power plants. Forecasts indicate that coal will still be the predominant fuel used to produce electricity and thus any actions aimed at increasing the efficiency of electricity production are purposeful. Enormous amounts of waste heat, which is not sufficiently used, are released during the process of electricity production. One of the ways to manage it is to use refrigeration systems based on adsorption chillers which would use waste heat to generate cold that would be employed for air-conditioning or process purposes. In this paper, the cycle of a conventional coal-fired power plant was modelled and then the possibilities of using waste heat for generation of cold as well as the impact of a chiller on the operation of a power unit were analysed using IPSEpro software.
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