Measurements and vibration analysis of a five-stage axial-flow microturbine operating in an ORC cycle

• Autorzy: Kaczmarczyk T. Z. , Żywica G. , Ihnatowicz E.

Warianty tytułu

PL

Pomiary i analiza poziomu drgań pięciostopniowej mikroturbiny osiowej pracującej w obiegu ORC

• Języki publikacji: EN

Abstrakty

EN

This paper presents results concerning the experimental investigation of a five-stage prototypical axial-flow microturbine operating in an ORC installation. The microturbine has an electrical capacity of 3 kW at the nominal rotational speed of 12000 rpm and is supplied with a low-boiling medium's vapour HFE7100. During the test, both the full vibration frequency distribution and the overall level of the velocity vibrations RMS in the microturbine were measured. A spectral analysis of vibration velocity was conducted during the grind-in process after a modernisation of the shrouding bandage of the microturbine set's flow system took place. The article presents the operational characteristics of the ORC system as well as the characteristics showing the electric power produced as the function of rotational speed of the microturbine. On the basis of the results obtained, there was assessed the dynamic performance of the microturbine and it was ranked according to ISO 10816-1 standard. The paper also shows the measurement results of the so-called kurtosis within the frequency range of 15 to 30 kHz, which made it possible to evaluate the dynamic state of the rolling bearings by which the microturbine rotor was supported.

PL

W artykule przedstawiono wyniki badań poziomu drgań podczas rozbiegu prototypowej 5-stopniowej osiowej mikroturbiny pracującej w obiegu Rankine'a. Mikroturbina o nominalnej mocy 3 kW i prędkości obrotowej 12000 obr/min była zasilana parą czynnika niskowrzącego HFE7100. Podczas badań zmierzono rozkłady częstotliwościowe oraz ogólny poziom prędkości drgań Vrms mikroturbiny w zależności od prędkości obrotowej. Przedstawiono analizę prędkości drgań podczas docierania i po modernizacji bandaży układu przepływowego mikroturbozespołu. Zamieszczono charakterystyki pracy obiegu ORC oraz charakterystyki mocy elektrycznej w zależności od prędkości obrotowej mikroturbiny. Na podstawie uzyskanych wyników oceniono stan dynamiczny mikroturbiny oraz zaklasyfikowano badaną maszynę przepływową wg normy ISO 10816-1. W pracy zamieszczono wyniki pomiarów tzw. kurtozy w przedziale 15-30 kHz na podstawie której wykonano ocenę stanu łożysk tocznych układu wirującego mikroturbiny.

Słowa kluczowe

EN

five-stage axial-flow microturbine; distribution of vibration level; HFE7100; ORC

PL

pięciostopniowa mikroturbina osiowa; rozkład poziomu drgań; HFE7100; ORC

• Wydawca: Polskie Towarzystwo Diagnostyki Technicznej
• Czasopismo: Diagnostyka
• Rocznik: 2017
• Tom: Vol. 18, No. 2
• Strony: 51--58
• Opis fizyczny: Bibliogr. 39 poz., rys., tab., wykr., zdj.

Twórcy

autor

Kaczmarczyk T. Z.

• Institute of Fluid Flow Machinery, Polish Academy of Sciences Department of Turbine Dynamics and Diagnostics, Fiszera 14, 80-231 Gdańsk, Poland

autor

Żywica G.

• Institute of Fluid Flow Machinery, Polish Academy of Sciences Department of Turbine Dynamics and Diagnostics, Fiszera 14, 80-231 Gdańsk, Poland

autor

Ihnatowicz E.

• Institute of Fluid Flow Machinery, Polish Academy of Sciences Department of Turbine Dynamics and Diagnostics, Fiszera 14, 80-231 Gdańsk, Poland

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