Page 12 - Advanced Gas Turbine Cycles

Contents ix

4.4. Cycle calculations with turbine cooling ................ 65
4.5. Conclusions .................................. 68
References ................................... 69

Chapter 5 . Full calculations of plant efficiency ................. 71

5.1. Introduction .................................. 71
5.2. Cooling flow requirements ........................ 71
5.2.1. Convective cooling ............................. 71
5.2.2. Film cooling .................................. 72
5.2.3. Assumptions for cycle calculations ................... 73
5.3. Estimates of cooling flow fraction ................... 73
5.4. Single step cooling ............................. 75
5.5. Multi-stage cooling ............................. 75
5.6. A note on real gas effects ......................... 82
5.7. Other studies of gas turbine plants with turbine cooling ..... 82
5.8. Exergy calculations ............................. 82
5.9. Conclusions .................................. 84
References ................................... 84

Chapter 6 . ‘Wet’ gas turbine plants ......................... 85

6.1. Introduction .................................. 85
6.2. Simple analyses of STIG type plants .................. 85
6.2.1. The basic STIG plant ............................ 85
6.2.2. The recuperative STIG plant ....................... 90
6.3. Simple analyses of EGT type plants .................. 91
6.3.1. A discussion of dry recuperative plants with ideal heat
exchangers ................................... 91
6.3.2. The simple EGT plant with water injection ............. 93
6.4. Recent developments ............................ 97
6.4.1. Developments of the STIG cycle .................... 97
6.4.1 . 1. The ISTIG cycle ............................... 97
6.4.1.2. The combined STIG cycle ......................... 99
6.4.1.3. The FAST cycle ............................... 99
6.4.2. Developments of the EGT cycle ..................... 99
6.4.2.1. The RWI cycle ................................ 100
6.4.2.2. The HAT cycle ................................ 100
6.4.2.3. The REVAP cycle .............................. 100
6.4.2.4. The CHAT cycle ............................... 101
6.4.2.5. The TOPHAT cycle ............................. 101
6.4.3. Simpler direct water injection cycles .................. 103