Energy And Exergy Analysis For A New Models With Gradual Expansion Combined With Multiple Power Generation Systems

Yıl 2024, Cilt: 12 Sayı: 4, 2115 - 2130, 23.10.2024

Ahmet Elbir

https://doi.org/10.29130/dubited.1460109

Öz

Our utilization of waste heat sources, combined with multiple power generation systems and systems featuring gradual expansion, constitutes a crucial domain in terms of energy and exergy analysis. Within these systems, the utilization of energies derived from various power sources reveals the availability of system components, highlighting the importance of meticulous analysis during design and operation to mitigate energy and exergy losses. Energy and exergy analysis stands as a pivotal method employed throughout the design, operation, and maintenance phases of these systems. This study initiates with the commencement of the combustion chamber temperature and turbine output temperature of a UGT-25000 gas turbine, followed by the development of the system through gradual expansion processes. A comprehensive thermodynamic analysis of the integrated power generation system was conducted, encompassing heat transitions across the H2O Rankine cycle, R113 ORC cycle, S-CO2 cycle, electrolyzer, and NH3H2O absorption cycle along with successive sub-cycles. Additionally, energy extraction from turbines was facilitated through the gradual expansion of the air-Brayton, R113-ORC, H2O-Rankine, and S-CO2 cycles. The resulting net powers are as follows: 0.0034 kg/s of hydrogen produced with the electrolyzer from the Air Brayton cycle, 34,314 kW; H2O Rankine cycle, 1,828 kW; R113 ORC, 681 kW; NH3H2O absorption cycle, 2,985 kW; and S-CO2 cycle, 1,720 kW. The energy efficiency of the multi-integrated system is calculated to be 66.35%, with an exergy efficiency of 35%.

Anahtar Kelimeler

Energy analysis 1, Exergy analysis 2, Brayton cycle 3, Rankine cycle 4, Organic rankine cycle 5, Absorption cycle 6, Electolyzer 7

Kademeli Genişlemeli Çoklu Güç Üretim Sistemleri İle Birlikte Yeni Modeller İçin Enerji ve Ekserji Analizi

Öz

Atık ısıl kaynakların kullanımı, birden fazla güç üretim sistemi ve kademeli genişleme özelliklerine sahip sistemlerle birleştirilerek, enerji ve ekserji analizi açısından kritik bir alan oluşturur. Bu sistemler içinde, çeşitli güç kaynaklarından elde edilen enerjilerin kullanımı, sistem bileşenlerinin kullanılabilirliğini ortaya çıkararak, tasarım ve işletme sırasında enerji ve ekserji kayıplarını azaltmak için titiz bir analizin önemini vurgular. Enerji ve ekserji analizi, bu sistemlerin tasarımı, işletilmesi ve bakım aşamaları boyunca kullanılan temel bir yöntemdir. Bu çalışma, bir UGT-25000 gaz türbininin yanma odası sıcaklığı ve türbin çıkış sıcaklığı ile başlar ve ardından sistem, kademeli genişleme süreçleriyle geliştirilir. Entegre güç üretim sisteminin kapsamlı termodinamik analizi yapılmış olup, H2O Rankine çevrimi, R113 ORC çevrimi, S-CO2 çevrimi, elektrolizer ve NH3H2O emilim çevrimi ile ardışık alt çevrimler arasındaki ısı geçişlerini içerir. Ayrıca, türbünlardan enerji çıkarılması, hava-Brayton, R113-ORC, H2O-Rankine ve S-CO2 çevrimlerinin kademeli genişlemesi ile kolaylaştırılmıştır. Elde edilen net güçler aşağıdaki gibidir: Elektrolizerden Air Brayton çevrimiyle üretilen hidrojen miktarı 0,0034 kg/s, 34.314 kW; H2O Rankine çevrimi, 1.828 kW; R113 ORC, 681 kW; NH3H2O emilim çevrimi, 2.985 kW; ve S-CO2 çevrimi, 1.720 kW. Çoklu entegre sistemimizin enerji verimliliği %66,35 olarak hesaplanmış olup, ekserji verimliliği %35'tir.

Anahtar Kelimeler

Enerji analizi 1, Ekserji analizi 2, Brayton çevrimi 3, Rankine çevrimi 4, Organik Rankine çevrimi 5, Emilim çevrimi 6, Elektrolizör 7

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