A novel exergy optimization of Bushehr nuclear power plant by gravitational search algorithm (GSA)

Naserbegi, A.; Aghaie, M.; Minuchehr, A.; Alahyarizadeh, Gh.

doi:10.1016/j.energy.2018.01.119

Cited by 51 publications

(16 citation statements)

References 22 publications

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“…2 [17]. The majority of marine steam power plant components are the same as in land-based steam power plants [18,19], but the operation of a marine steam plant must be much more dynamic. Along with the already mentioned two identical Turbo-Generator Steam Turbines, the marine steam system also consists of two identical steam generators [20] in front of which forced draft fans [21] and air heaters (air is heated with steam) [22] are mounted.…”

Section: Description Of the Analyzed Marine Tgst And The Steam Power mentioning

confidence: 99%

Energy Loss Analysis at the Gland Seals of a Marine Turbo-Generator Steam Turbine

Kocijel

Poljak

Mrzljak

et al. 2020

Teh. glas. (Online)

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The paper presents an analysis of marine Turbo-Generator Steam Turbine (TGST) energy losses at turbine gland seals. The analyzed TGST is one of two identical Turbo-Generator Steam Turbines mounted in the steam propulsion plant of a commercial LNG carrier. Research is based on the TGST measurement data obtained during exploitation at three different loads. The turbine front gland seal is the most important element which defines TGST operating parameters, energy losses and energy efficiencies. The front gland seal should have as many chambers as possible in order to minimize the leaked steam mass flow rate, which will result in a turbine energy losses' decrease and in an increase in energy efficiency. The steam mass flow rate leakage through the TGST rear gland seal has a low or negligible influence on turbine operating parameters, energy losses and energy efficiencies. The highest turbine energy efficiencies are noted at a high load -on which TGST operation is preferable.

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Section: Description Of the Analyzed Marine Tgst And The Steam Power mentioning

confidence: 99%

Energy Loss Analysis at the Gland Seals of a Marine Turbo-Generator Steam Turbine

Kocijel

Poljak

Mrzljak

et al. 2020

Teh. glas. (Online)

View full text Add to dashboard Cite

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“…Energy and exergy analyses are widely used methods for the investigation of processes [36,37], power plants [38][39][40], industrial plants [41,42] or their components. [43,44].…”

Section: Energy and Exergy Analysesmentioning

confidence: 99%

Energy and Exergy Analyses of Forced Draft Fan for Marine Steam Propulsion System during Load Change

Mrzljak

Blecich

Anđelić

et al. 2019

JMSE

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A forced draft fan, used for the supply of combustion air into the steam generator of the conventional liquefied natural gas (LNG) carrier was analyzed from the aspect of energy and exergy. The power delivered from the induction motor to the fan was calculated using the manufacturer’s data. The most significant impact on the fan energy power losses is from the air temperature difference between the fan outlet and inlet. The fan energy power losses are inversely proportional to the fan energy efficiency, and the values are between 19.9% and 63.4%, for the entire range of observed steam system loads. The fan exergy destruction depends primarily on the driving power and on the air mass flow rate. At higher loads, an important influence on the fan exergy destruction is from the air pressure at the fan outlet. The exergy efficiency change of the analyzed fan, for the range of observed steam system loads, is directly proportional to the rate of change in the air mass flow, whereas the obtained values of exergy efficiency are between 5.10% and 53.93%. The impact of ambient temperature on the fan exergy destruction and exergy efficiency exhibits is different than in most other steam system components. A change in ambient temperature of 10 °C causes a change in the exergy efficiency of the forced draft fan less than 0.5% in the entire range of observed steam loads.

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“…Steam turbines are widely used components in power plants for electricity production all over the world [1,2]. Such steam turbines are high-power, complex components which consist of several cylinders and a number of turbine stages in each cylinder [3,4].…”

Section: Introduction / Uvodmentioning

confidence: 99%

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

et al. 2020

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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 696.74 kW 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 pare. Analiza pokazuje da visokotlačni dio proizvodi većinu snage turbine i posljedično ima veće mehaničke, energijske i eksergijske gubitke u usporedbi s niskotlačnim dijelom turbine. Bez obzira na teže radne uvjete, niskotlačni dio turbine ima veću učinkovitost i manje specifi čne gubitke (u energijskoj i eksergijskoj analizi) u usporedbi s visokotlačnim dijelom turbine. Cijela analizirana turbina ima energijsku i eksergijsku učinkovitost jednaku 62.84 % i 65.58 %, dok su gubici energije i eksergije turbine 696.74 kW i 618.50 kW. Kumulativna proizvedena snaga na izlazu turbinskog vratila jednaka je 1178.40 kW. Oduzimanjem pare kojim se analizirana turbina dijeli na visokotlačni i niskotlačni dio može se isporučiti značajna količina topline bilo kojem potrošaču topline u pomorskoj industriji, što predstavlja značajnu prednost promatrane turbine u usporedbi sa sličnim brodskim parnim turbinama male snage koje obično nemaju oduzimanje pare. KEY WORDS steam turbine low-power steam extraction marine applications thermodynamic analysis KLJUČNE RIJEČI parna turbina mala snaga oduzimanje pare primjena u pomorstvu termodinamička analiza

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A novel exergy optimization of Bushehr nuclear power plant by gravitational search algorithm (GSA)

Cited by 51 publications

References 22 publications

Energy Loss Analysis at the Gland Seals of a Marine Turbo-Generator Steam Turbine

Energy Loss Analysis at the Gland Seals of a Marine Turbo-Generator Steam Turbine

Energy and Exergy Analyses of Forced Draft Fan for Marine Steam Propulsion System during Load Change

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

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