Utilisation of bleed steam heat to increase the upper heat source temperature in low-temperature ORC

• Autorzy: Mikielewicz D. , Mikielewicz J.
• Języki publikacji: EN

Abstrakty

EN

In the paper presented is a novel concept to utilize the heat from the turbine bleed to improve the quality of working fluid vapour in the bottoming organic Rankine cycle (ORC). That is a completely novel solution in the literature, which contributes to the increase of ORC efficiency and the overall efficiency of the combined system of the power plant and ORC plant. Calculations have been accomplished for the case when available is a flow rate of low enthalpy hot water at a temperature of 90 [degrees]C, which is used for preliminary heating of the working fluid. That hot water is obtained as a result of conversion of exhaust gases in the power plant to the energy of hot water. Then the working fluid is further heated by the bleed steam to reach 120 [degrees]C. Such vapour is subsequently directed to the turbine. In the paper 5 possible working fluids were examined, namely R134a, MM, MDM, toluene and ethanol. Only under conditions of 120 [degrees]C/40 [degrees]C the silicone oil MM showed the best performance, in all other cases the ethanol proved to be best performing fluid of all. Results are compared with the "stand alone" ORC module showing its superiority.

Słowa kluczowe

EN

bleed steam utilisation; increase of upper source temperature; ORC

PL

utylizacja; zwiększenie górnej temperatury

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2011
• Tom: Vol. 32, no. 3
• Strony: 57--70
• Opis fizyczny: Bibliogr. 5 poz.,

Twórcy

autor

Mikielewicz D.

autor

Mikielewicz J.

• Gdansk University of Technology, Faculty of Mechanical Engineering, Department of Energy and Industrial Apparatus, ul. Narutowicza 11/12 80-233 Gdańsk, Poland,

Bibliografia

• [1] MIKIELEWICZ D., WAJS J., GLIŃSKI M., MIKIELEWICZ J.: Analysis of possibilities of utilisation of heat pumps for increasing working fluid parameters in ORC power plant. Report IFFM PAN, 79/2011 (in Polish).
• [2] MIKIELEWICZ D., WAJS J., GLIŃSKI M., MIKIELEWICZ J.: Analysis of possibilities of utilisation of solar collectors for increasing working fluid parameters in ORC power plant. Report IFFM PAN 395/2011 (in Polish).
• [3] MIKIELEWICZ D., WAJMAN M.: Investigations into possibility of condenser cooling in ORC power plant using the ground as the low-temperature heat reservoir. Report IFFM PAN 368/2011 (in Polish).
• [4] ANGELINO G., INVERNIZZI C., MOLTENI G.: The potential role of organic bottoming Rankine cycles in steam power stations. Proc. IMechE Part A 213(1999), 75–81.
• [5] Refprop 9.0. National Institute of Standards, 2010.