Exergy analysis of internal regeneration in supercritical cycles of ORC power plant

• Autorzy: Borsukiewicz-Gozdur A.
• Języki publikacji: EN

Abstrakty

EN

In the paper presented is an idea of organic Rankine cycle (ORC) operating with supercritical parameters and so called dry fluids. Discussed is one of the methods of improving the effectiveness of operation of supercritical cycle by application of internal regeneration of heat through the use of additional heat exchanger. The main objective of internal regenerator is to recover heat from the vapour leaving the turbine and its transfer to the liquid phase of working fluid after the circulation pump. In effect of application of the regenerative heat exchanger it is possible to obtain improved effectiveness of operation of the power plant, however, only in the case when the ORC plant is supplied from the so called sealed heat source. In the present paper presented is the discussion of heat sources and on the base of the case study of two heat sources, namely the rate of heat of thermal oil from the boiler and the rate of heat of hot air from the cooler of the dinkier from the cement production line having the same initial temperature of 260[degrees]C, presented is the influence of the heat source on the justification of application of internal regeneration. In the paper presented are the calculations for the supercritical ORC power plant with R365mfc as a working fluid, accomplished has been exergy changes and exergy efficiency analysis with the view to select the most appropriate parameters of operation of the power plant for given parameters of the heat source.

Słowa kluczowe

EN

exergy analysis; internal heat regeneration; ORC; supercritical power plant

PL

analiza egzergii; nadkrytyczny blok węglowy; ORC; regeneracja ciepła

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2012
• Tom: Vol. 33, no. 3
• Strony: 51--63
• Opis fizyczny: Bibliogr. 5 poz.,Rys., tab.,

Twórcy

autor

Borsukiewicz-Gozdur A.

• West Pomeranian University of Technology, Department of Heat Engineering, al. Piastów 17, 70-310 Szczecin, Poland,

Bibliografia

• [1] DIPIPPO R.: Second low assessment of binary plants generating power from low-temperature geothermal fluids. Geothermics 33(2004), 565-586.
• [2] HUNG T.C., SHAI T.Y., WANG S.K.: A review of organic Rankine cycles (ORCs) for the recovery of low-grade waste heat. Energy 22(1997), 7, 661-667.
• [3] MIKIELEWICZ D., MIKIELEWICZ J.: Utilisation of bleed steam heat to increase the upper heat source temperature in low-temperature ORC. Archives of Thermodynamics 32(2011), 3, 57-70.
• [4] MARION M., VOICU I., TIFFONNET A.-L.: Study and optimization of a solar sub-critical organic Rankine cycle. Renewable Energy 48(2012), 100-109.
• [5] LEMMON E.W., HUBER M.L., MCLINDEN M.O.: Refprop 9.0. NIST Standard Reference Database 23, Ver. 9.0, 2010, USA.