Energy and exergy analyses of a fluidized bed coal combustor steam plant in textile industry

Ozdil, N. Filiz Tumen; Tantekin, Atakan; Erbay, Zafer

doi:10.1016/j.fuel.2016.06.091

Cited by 33 publications

(9 citation statements)

References 13 publications

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“…Buna karşı olarak ise incelenen her iki sistemde ekserji yıkım değerinde artış yaşanmıştır. Elde edilen bu sonuç literatürle uyumludur [39][40][41][42][43][44]. Standart ölü hal koşulunda kazanın ekserji verimi %45,11 ekserji yıkım değeri ise 37,5 MW'tır.…”

Section: Sonuçlarunclassified

“…Ozdil vd. [42], Adana'da bulunan 6,5 MW'lık kuvvet santrali için ortam sıcaklığındaki değişimin birinci ve ikinci yasa verimliliklerini incelemiştirler. Buna göre ortam sıcaklığı arttıkça akışkan yataklı kazanın ikinci yasa veriminde artış gözlemlemişlerdir.…”

Section: Introductionunclassified

“…Ayrıca ortam sıcaklığının ve fazla hava miktarının ikinci yasa verimi üzerindeki etkisini incelemişlerdir. Ozdil vd [42],. Adana'da bulunan 6,5 MW'lık kuvvet santrali için ortam sıcaklığındaki değişimin birinci ve ikinci yasa verimliliklerini incelemiştirler.…”

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Çevre Sıcaklığının Dolaşımlı Akışkan Yataklı Kazanın Ekserji Performansı Üzerindeki Etkisi

Yazici

Köse

2019

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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Sunulan bu çalışmada, Eskişehir'in Seyitgazi ilçesinde yer alan bir endüstriyel tesisteki 75 t/h buhar kapasiteli dolaşımlı akışkan yataklı kazanın konvansiyonel ekserji analizi yapılmıştır. Yapılan analizde; çevre sıcaklığındaki değişimin, kazan ve hava ısıtıcısının ekserji performansına olan etkisi irdelenmiştir. Bunun için standart ölü hal koşulu 25℃, 101,325 kPa ve ölçüm değerlerinin ortalaması olarak 17,27℃, 89,4 kPa'ın yanı sıra 30℃, 28℃, 20℃, 15℃ ve 12℃ için hesaplamalar yapılmıştır. Dolaşımlı akışkan yataklı kazan bölümler halinde incelenmesinden ziyade bir bütün olarak kabul edilmiştir. Hava ısıtıcısı ise kazandan ayrı olarak değerlendirilmiştir. Yapılan hesaplamalar sonucunda kazan ve hava ısıtıcısında gerçekleşen ekserji kayıpları belirlenmiştir. Ayrıca kazan ve hava ısıtıcısının ekserji verimleri hesaplanarak ekserji performansı ortaya çıkarılmıştır. Bu çalışma, dolaşımlı akışkan yataklı kazanın ve hava ısıtıcının ekserji performans kriterlerinin çevre sıcaklığındaki değişimden önemli ölçüde etkilendiğini göstermiştir.

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Section: Sonuçlarunclassified

Section: Introductionunclassified

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Çevre Sıcaklığının Dolaşımlı Akışkan Yataklı Kazanın Ekserji Performansı Üzerindeki Etkisi

Yazici

Köse

2019

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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“…Parts of the system, tested in that study, were classified as a fluidized bed coal combustor, a heat recovery steam generator, an economizer, fans, pumps, a cyclone, and a chimney. All of the parts were assessed and the energy and exergy analyses were investigated for all of the system components [2]. The thermodynamic investigation was fulfilled to indicate the performance of the 14.25 MW cogeneration proposed energy system and the parts of the system were observed and thermodynamic performance assessments were evaluated.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic and Environmental Comparative Investigation and Optimization of Landfill vs. Incineration for Municipal Solid Waste: A Case Study in Varamin, Iran

Ghasemi

Moghaddam

2020

Journal of Thermal Engineering

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Waste to energy (WtE) introduces an appropriate solution for municipal solid waste (MSW) disposal and greenhouse gas emission reduction. In this study, for Varamin MSW management, a gas turbine plant with heat recovery unit that is fed by landfill gas (LFG) and combined heat and power (CHP) incineration plant is investigated and compared as two WtE systems to reveal the best plant effectively. Exergy and environmental analyses of two systems are performed. Moreover, the effects of key parameters as decision variables on the energy and exergy efficiencies are identified by sensitive analysis of both systems. Multi-objective optimization of thermal and exergy efficiencies are then done by using Genetic Algorithm (GA) for each studied system. As a result, Furnace in incineration system and Combustion Chamber in landfill system have the most exergy destruction rate. Also, optimization results show that thermal and exergy effectiveness for landfill system are improved by 7.01% and 6.53% respectively; these values for incineration system are calculated to be 45.35% and 92.75% respectively.

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“…The investigation of exergy destructions within the whole plant with 600 and 660 MW supercritical coal-fired power generation units were also conducted by Liu and Duan (Liu, et al, 2010) and Yang et al (Yang, et al, 2013), respectively. The exergy equilibrium method has also been extensively applied to the analysis of energy consumption and economic efficiency of systems, including solar energy combined power generation (Zhu, et al, 2016;Adibhatla, et al, 2017), combined cycle power generation (Nami, et al, 2017), ground source heat pump system (Menberg, et al, 2017), lignite drying power generation (Han, et al, 2017), poly-generation with circulating fluidized bed (Gürtürk, et al, 2016;Tumen Ozdil, et al, 2016), optimization of heat supply network (Semkov, et al, 2014), distributed energy (Compton, et al, 2017), organic Rankine cycle (Darvish, et al, 2015;Zhao, et al, 2017), and CO 2-capturing (Jin, et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Energy-loss mechanism of boilers system in large-scale coal-fired power plants and the corresponding energy-saving approaches

Wang

Yu-zhao²,

Xuan

et al. 2019

JTST

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To evaluate the energy efficiency of the energy conversion and transfer, and the dig energy-saving potential during coal-fired power generation, the energy-loss mechanism was determined through a comparative analysis of thermal and exergy equilibria. Energy loss is first identified as exergy destruction, which is then gradually collected and finally discharged in the form of waste heat through terminals such as a condenser. Furthermore, the exergy-destruction distribution represents the theoretical energy-saving potential, which occurs mainly in the boiler. Accordingly, an in-depth study was conducted on the technical approaches to reduce the combustion-and heat transfer-induced exergy-destruction and other exergy-destruction in the boiler. These technical approaches include elevating hot-air temperature, oxy combustion, reducing excess air coefficient, and increasing the main steam/reheated steam parameters. Results show that technical solutions of elevating the hot-air temperature, increasing the air oxygen content, elevating the main steam/reheated steam temperature, and increasing the main steam pressure can reduce the net coal-consumption rate of a coal-fired power unit by 6-9, 6-10, 11, and 5-12 g/kW•h, respectively. These conclusions indicate the direction of the development of energy-saving technologies for coal-fired power generation.

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Energy and exergy analyses of a fluidized bed coal combustor steam plant in textile industry

Cited by 33 publications

References 13 publications

Çevre Sıcaklığının Dolaşımlı Akışkan Yataklı Kazanın Ekserji Performansı Üzerindeki Etkisi

Çevre Sıcaklığının Dolaşımlı Akışkan Yataklı Kazanın Ekserji Performansı Üzerindeki Etkisi

Thermodynamic and Environmental Comparative Investigation and Optimization of Landfill vs. Incineration for Municipal Solid Waste: A Case Study in Varamin, Iran

Energy-loss mechanism of boilers system in large-scale coal-fired power plants and the corresponding energy-saving approaches

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