Geri Dön

Performance enhancement of semi-closed cycle gas turbines by aqueous glycol direct contact chilling

Başlık çevirisi mevcut değil.

PDF İndir

  1. Tez No: 402888
  2. Yazar: ERMAN KADİR ÖZTEKİN
  3. Danışmanlar: DR. WILLIAM E. LEAR
  4. Tez Türü: Yüksek Lisans
  5. Konular: Makine Mühendisliği, Mechanical Engineering
  6. Anahtar Kelimeler: Belirtilmemiş.
  7. Yıl: 2012
  8. Dil: İngilizce
  9. Üniversite: University of Florida
  10. Enstitü: Yurtdışı Enstitü
  11. Ana Bilim Dalı: Belirtilmemiş.
  12. Bilim Dalı: Belirtilmemiş.
  13. Sayfa Sayısı: 76

Özet

Özet yok.

Özet (Çeviri)

A PoWER variant consisting of the HPRTE semi-closed cycle gas turbine, VARS, and glycol cycle was modeled by using zero-dimensional steady state thermodynamics. The VARS was modeled using a second law efficiency approach. Two cases were considered: a medium size and a small engine. In contrast to previous studies, all of the refrigeration capacity was used to cool the high pressure compressor inlet to below ambient temperature. Cooling of the gas was provided by the VARS system both directly and indirectly. Final drying of the gas flow and depression of the temperature below freezing were accomplished by a direct contact spray chamber. The VARS cycle was operated on the usable waste heat of the semi closed gas turbine cycle. A thermodynamic model was developed for the complete system, and parametric results were generated. The following are conclusions drawn from this analysis:  The medium size engine with 14% blade cooling has a predicted efficiency of 47.8% without spray cooling. Spray cooling raises system efficiency up to 50%.  The small engine with 14% blade cooling of the compressed air has an efficiency of 34.8% without spray cooling. Spray cooling raises system efficiency up to 37.5%.  Spray cooling results in a greater system efficiency increase for the small engine than for the medium size engine.  Spray cooling provides a flatter maximum efficiency peak for both sizes. For different ambient conditions, the spray cooled system efficiency is insensitive to ambient temperature for both small and medium size engines. So the system can be run under these conditions with stable performance even while the temperature during a particular day changes.  Increasing temperature at the exit of the burner always has a positive effect on system efficiency, whereas recuperator inlet temperature exhibits an optimal value. Spray cooling becomes useless after that peak value since the system does not have much available waste heat. 63  The temperature at the inlet of the high pressure compressor drops to around -13°C for both small and medium size engines for given base case conditions. This temperature is very sensitive to input parameters which are recuperator inlet temperature, burner exit temperature, and generator exit temperature.  The solution mass flow rate must be determined by considering both the cooling effect of the spray chamber and the freezing point of the solution. The higher mass flow rates decrease the efficiency gain of the system, however, the solution does not freeze as easily. Mass flow rate must be selected based on the design point of the system. If the design point promises more available waste heat, then higher solution mass flow rates can be used.

Benzer Tezler

  1. Tez No

    455349

    Elektrik iletim sistemi güç transformatörleri için güvenilirlik merkezli donanım yönetimi sürecinin kurulması ve değerlendirilmesi

    Reliability centered asset management for power transformers in Turkish national power transmission system

    HAVVA AYSUN KÖKSAL

    Doktora

    Türkçe

    Türkçe

    2016

    Elektrik ve Elektronik Mühendisliğiİstanbul Teknik Üniversitesi

    Elektrik Mühendisliği Ana Bilim Dalı

    PROF. DR. AYDOĞAN ÖZDEMİR

  2. Tez No

    737894

    Alkylacrylamide-based semi-interpenetrating networks for temperature-sensitive smart systems

    Sıcaklığa duyarlı akıllı sistemler için alkilakrilamid bazlı yarı iç içe geçmiş ağyapılar

    BİRGÜL KALKAN

    Yüksek Lisans

    İngilizce

    İngilizce

    2022

    Kimyaİstanbul Teknik Üniversitesi

    Kimya Ana Bilim Dalı

    PROF. DR. NERMİN ORAKDÖĞEN

  3. Tez No

    619649

    Radyal pompaların kavitasyon performansının hesaplanması ve iyileştirilmesi

    Computation and improvement of the cavitation performance of radial flow pumps

    MEHMET KAYA

    Doktora

    Türkçe

    Türkçe

    2020

    Makine Mühendisliğiİstanbul Teknik Üniversitesi

    Makine Mühendisliği Ana Bilim Dalı

    PROF. DR. ERKAN AYDER

  4. Tez No

    381886

    Kapalı ortamlara yerleştirilen objelere ilişkin düz ve ters saçılma problemleri

    Forward and inverse scattering problems for the objects located in a closed medium

    GİZEM DİLMAÇ

    Yüksek Lisans

    İngilizce

    İngilizce

    2015

    Elektrik ve Elektronik Mühendisliğiİstanbul Teknik Üniversitesi

    Elektronik ve Haberleşme Mühendisliği Ana Bilim Dalı

    PROF. DR. ALİ YAPAR

  5. Tez No

    154709

    A theoretical analysis of GaInNAs/GaAs quantum vells for long wavelength emission

    GaInNAs/GaAs uzun dalgaboylu kuantum kuyu lazerlerin teorik olarak incelemmesi

    MURAT ODUNCUOĞLU

    Doktora

    İngilizce

    İngilizce

    2004

    Fizik ve Fizik MühendisliğiGaziantep Üniversitesi

    Fizik Mühendisliği Ana Bilim Dalı

    DOÇ.DR. BEŞİRE GÖNÜL

Geri Dön