Analytical Assessment of Power of Composite Flash Geothermal Systems

• Autorzy: Barbacki Antoni

Identyfikatory

DOI

10.7494/geom.2019.13.3.15

Warianty tytułu

PL

Analityczne formuły do oceny mocy kombinowanych systemów energetycznych z separacją pary geotermalnej

• Języki publikacji: EN

Abstrakty

EN

Analytical formulas make it possible to observe thermodynamic processes without using advanced numerical procedures, as the relationships between the physical parameters become clearly visible. While less accurate, these formulas enable students at the academic research level to quickly and easily model the phenomena using simple calculation programs. For a single-flash system, the linear approximation makes it possible to obtain the expression for the optimum flash temperature and maximal specific power in the assumed temperature interval of geothermal fluid (100–250°C). These formulas were presented in the author’s previous works. Now, this procedure was used in example analyses for double-flash, combination single & second, and combination single & ORC systems. It was shown that, in the assumed temperature interval of geothermal fluid, the percentage of the additional power of composite-flash geothermal systems is almost a linear function of geothermal fluid temperature as related to a single-flash plant and that the single-flash & ORC cycle gives the highest additional specific power.

PL

Artykuł stanowi kontynuację analiz dotyczących doboru optymalnych parametrów pracy systemów geotermalnych w przypadku występowania w złożu mediów dwufazowych. Geotermalna mieszanina woda-para w jedno- lub dwustopniowym procesie rozprężania przechodzi w stan pary suchej napędzającej turbozespół. Porównano efektywności energetyczne systemu z jednostopniowym rozprężaniem płynu i systemów rozprężania dwustopniowego w wariancie „double-flash” i „combination single & second” oraz systemu „single & ORC”. Wyniki uzyskanej analizy wskazują, że wśród analizowanych układów najwyższą moc wykazuje system „single & ORC”, w którym system z jednostopniowym rozprężaniem płynu współpracuje z systemem binarnym.

Słowa kluczowe

EN

geothermal; flash system; optimal specific power; composite unit analysis

PL

geotermia; rozprężanie płynów geotermalnych; moc optymalna; złożone systemy geotermalne

• Wydawca: AGH University of Science and Technology Press
• Czasopismo: Geomatics and Environmental Engineering
• Rocznik: 2019
• Tom: Vol. 13, no. 3
• Strony: 15--28
• Opis fizyczny: Bibliogr. 13 poz., rys., wykr.

Twórcy

autor

Barbacki Antoni

• AGH University of Science and Technology, Faculty of Mining Surveying and Environmental Engineering, Department of Management and Protection of Environmental, Krakow, Poland

Bibliografia

• [1] Fridleifsson I.B.: Present status and potential role of geothermal energy in the world. Renewable Energy, vol. 8, no. 1–4, 1996, pp. 34–39.
• [2] Fridleifsson I.B.: Status of geothermal energy amongst the world’s energy sources. Geothermics, vol. 32, no. 4, 2003, pp. 379–388.
• [3] Bertani R.: Geothermal Power Generation in the World 2005–2010 Update Report. [in:] Proceedings World Geothermal Congress – Bali, Paper 0008, 2010 [CD].
• [4] DiPippo R.: Geothermal power plants: principles, applications, case studies and environmental impact. Butterworth-Heinemann, 2007.
• [5] Ryley D.: An analytical expression in terms of temperature only for optimizing the flash cycle for geothermal power plants. Geothermics, vol. 7, issue 1, 1978, pp. 9–15.
• [6] Swandaru B., Pallson H.: Modeling and optimization of possible bottoming units for general single flash geothermal power plants. [in:] Proceedings World Geothermal Congress – Bali, Paper 2611, 2010 [CD].
• [7] Kanoglu M., Dincer I., Rosen M.: Understanding energy and exergy efficiencies for improved energy management in power plants. Energy Policy, vol. 35, 2007, pp. 3967–3978.
• [8] DiPippo R.: Exergy analysis of combined electricity and direct-heat geothermal flash steam plants. Geothermal Resources Council Transaction, no. 11, 1987, pp. 411–416.
• [9] Barbacki A.: Classification of geothermal resources in Poland by exergy analysis-comparative study. Renewable and Sustainable Energy Reviews, vol. 16, 2012, pp. 123–128.
• [10] Barbacki A., Pająk L.: Assesment of Possibilities of Electricity Production in Flash Geothermal System in Poland. Geomatics and Environmental Engineering, vol. 11, no. 3, 2017, pp. 17–29.
• [11] DiPippo R.: A simplified method for estimating the silica scaling potential in geothermal power plants. Geothermal Resources Council – Bulletin, no. 3–9, 1985.
• [12] Nugroho J.: Optimization of electrical power production from high-temperature geothermal fields with respect to silica scaling problems. United Nations University – Geothermal Training Programme, Iceland, 2011, pp. 50.
• [13] Tomaszewska B., Pająk L.: 2012. Dynamics of clogging process in injection wells used to pump highly mineralized thermal waters into the sandstone structures lying under the Polish Lowlands. Archives of Environmental Protection, vol. 38, issue 3, 2012, pp. 105–117.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).