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Analysis of Low-Power Steam Turbine With One Extraction for Marine Applications

2020; University of Dubrovnik; Volume: 67; Issue: 2 Linguagem: Inglês

10.17818/nm/2020/2.1

1848-6320

Vedran Medica-Viola, Vedran Mrzljak, Nikola Anđelić, Maro Jelić,

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The paper presents thermodynamic (energy and exergy) analysis of low-power steam turbine with one extraction for marine applications.Analyzed steam turbine is divided in two parts -High Pressure (HP) part before steam extraction and Low Pressure (LP) part after steam extraction.Analysis shows that HP turbine part produces the majority of cumulative turbine power and consequentially has higher mechanical, energy and exergy losses when compared to LP turbine part.Regardless of heavier operating conditions, LP turbine part has higher effi ciencies and lower specifi c losses (in both energy and exergy analysis) when compared to HP turbine part.Whole analyzed turbine has energy and exergy effi ciencies equal to 62.84% and 65.58%, while energy and exergy turbine losses are 696.74kW and 618.50 kW.Cumulative produced power at the turbine shaft outlet is equal to 1178.40 kW.Steam extraction which divides analyzed turbine on HP and LP part can deliver a notable amount of heat to any marine heat consumer, what represents a signifi cant advantage of observed turbine in comparison with similar low-power marine steam turbines which usually does not have steam extractions. Sažetak U radu je prikazana termodinamička (energijska i eksergijska) analiza parne turbine male snage s jednim oduzimanjem pare za primjenu u pomorstvu. Analizirana parna turbina podijeljena je u dva dijela -visokotlačni dio (HP) prije oduzimanja pare i niskotlačni dio (LP) nakon oduzimanja