INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS … · investigation of different solar hybrid gas...
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INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER Laboratory of Thermal Turbomachines National Technical University of Athens C. Kalathakis Research Assistant Ν. Aretakis Assistant Professor Ι. Roumeliotis Assistant Professor Κ. Mathioudakis Professor Α. Alexiou Senior Researcher
Transcript of INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS … · investigation of different solar hybrid gas...
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF
REJECTED SUN POWER
Laboratory of Thermal Turbomachines National Technical University of Athens
C. Kalathakis Research Assistant
Ν. Aretakis Assistant Professor
Ι. Roumeliotis Assistant Professor
Κ. Mathioudakis Professor
Α. Alexiou Senior Researcher
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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Motivation & Objectives
Fuel saving and emissions reduction → use of renewable energy
Solar thermal power in Brayton cycle for air preheating
Identify most promising GT configuration in terms of performance
Study hybridization type: retrofitting existing engine or design for solar-only operation
Exploit rejected Sun power to augment solar share and improve performance
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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INTRODUCTION
o Hybridization
o Modelling
PERFORMANCE STUDIES
o Gas Turbine Configurations & Hybridization Type
o Design Specifications & Operating Scenario
o Fuel-Only Engines Solar Retrofitted (FRS)
o Engines With Solar-Only Operation At Design (SDP)
DUAL FLUID RECEIVER
SUMMARY & CONCLUSIONS
Contents
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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INTRODUCTION
o Hybridization
o Modelling
PERFORMANCE STUDIES
o Gas Turbine Configurations & Hybridization Type
o Design Specifications & Operating Scenario
o Fuel-Only Engines Solar Retrofitted (FRS)
o Engines With Solar-Only Operation At Design (SDP)
DUAL FLUID RECEIVER
SUMMARY & CONCLUSIONS
Contents
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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HYBRIDIZATION
CONVENTIONALCONFIGURATION
SOLAR THERMAL CONFIGURATION
THERMAL ENGINE
FUEL
ELECTRICITY
THERMAL ENGINE
FUEL
ELECTRICITY
SUN
Hybridization
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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Modeling • PROOSIS: Object oriented simulation environment • Library components: Mathematical model of real world component • TURBO: Brayton cycle components • SOLAR: Solar part components
TURBO library SOLAR library
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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Modeling
Hybrid GT model in PROOSIS
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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INTRODUCTION
o Hybridization
o Modelling
PERFORMANCE STUDIES
o Gas Turbine Configurations & Hybridization Type
o Design Specifications & Operating Scenario
o Fuel-Only Engines Solar Retrofitted (FRS)
o Engines With Solar-Only Operation At Design (SDP)
DUAL FLUID RECEIVER
SUMMARY & CONCLUSIONS
Contents
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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Generator
Heliostats
Receiver
Burner
Compressor Turbine
Burner
Heliostats Receiver
Recuperator
Generator
Compressor Turbine
Generator
Heliostats
Receiver
Compressor
Burner
High Pressure Turbine
Power Turbine
Burner
Heliostats Receiver
Recuperator
High Pressure Compressor
High Pressure Turbine
Low Pressure Turbine
Low Pressure Compressor
Generator
Power Turbine
Intercooler
Studied Configurations
Single Shaft (SS) Single Shaft Recuperated (SS_R)
Twin Shaft (TS) 2Sp 3Sh Inter. Rec. (2Sp3Sh_I_R)
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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• Fuel-only engines solar retrofitted (FRS)
o Fuel-only operation at design point → Retrofitting → Solar hybrid operation
• Engines with solar-only operation at design (SDP)
o Designed with solar-only operation at design point
Type Of Hybridization
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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• First (pilot) plants MW scale – Demonstrated hybrid GT 4.5MWe on Tower
o 5MW engines chosen
• Receiver range: Up to 1000oC and 10bar
o High solar share & specific power → TIT = 1000oC & PR = 10
• Heliostat field
o Receiver outlet temperature = TIT @ 600W/m2 Summer solstice
Design Specifications
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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• Operating scenario
o Yearly continuous baseload operation → TIT constant
• Performance simulation
o Hourly performance simulation → Integration → Annual performance
Operating Scenario
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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Ambient Data
0
100
200
300
400
500
600
700
800
276
278
280
282
284
286
288
290
0 5 10 15 20
Irrad
iatio
n [W
/m2]
Tam
b [K
]
Time of the day [hours]
Ambient Tmperature & Irradiation For A Winter Day
TambIrrad
Temperature
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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Daily Performance Of FRS Engines
-25
-20
-15
-10
-5
0
0 5 10 15 20
ΔP [%
]
Time of the day [hours]
Produced Power Difference Between Fuel-only & FRS Engines For A Winter Day
SSSS_RTS2Sp3Sh_I_R
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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• Energy reduction: a) Receiver pressure drop, b) working fluid change
• Recuperated configurations → higher solar share and fuel efficiency, lower energy production penalty
Annual Performance Of FRS Engines
-40-30-20-10
0102030405060
SS SS_R TS 2Sp3Sh_I_R
Diffe
renc
e fr
om fu
el-o
nly
Annual Performance Comparisson Between FRS And Fuel-only Engines
ΔE ΔF Δeff_f fsol
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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• Energy augmentation due to higher mass flow • Recuperated configurations: higher solar share and fuel efficiency, lower energy augmentation
Annual Performance Of SDP Engines
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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o FRS → higher specific power
o FRS → higher fuel efficiency
Comparison Between FRS And SDP
0%
4%
8%
12%
SS SS_R TS 2Sp3Sh_I_R
ΔWai
r
Air Mass Flow Difference Between SDP & FRS Engines At Design Point
-20%
-16%
-12%
-8%
-4%
0%
SS SS_R TS 2Sp3Sh_I_R
Δeff
_f
Annual Fuel Thermal Efficiency Difference Between SDP & FRS Engines
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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INTRODUCTION
o Hybridization
o Modelling
PERFORMANCE STUDIES
o Gas Turbine Configurations & Hybridization Type
o Design Specifications & Operating Scenario
o Fuel-Only Engines Solar Retrofitted (FRS)
o Engines With Solar-Only Operation At Design (SDP)
DUAL FLUID RECEIVER
SUMMARY & CONCLUSIONS
Contents
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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Receiver outlet temperature limit → Defocusing mirrors → Rejected solar power
Higher solar share requires the exploitation of this power
5 10 15Time of the day [hours]
Available
Rejected
Used
Thermal Storage (regenerative) Research subject
Exploitation of Rejected Sun Power
An alternative …
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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Turbine
Generator
Compressor
Dual Fluid Receiver
Heliostats Burner
• Dual Fluid Receiver (DFR) o Excess power for STIG o STIG: Used technology o Solar steam: Used technology o Burner cooling o Higher solar share & power
• Operation o Focusing on secondary receiver o Steam pressure 20bar o Water flow → Saturated steam o Surge margin check
Dual Fluid Receiver (DFR)
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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• No energy production penalty • Higher solar share • Same magnitude of fuel saving
Exploitation of Rejected Sun Power
-40
-30
-20
-10
0
10
20
30
40
50
60
ΔE [%] ΔF [%] Δeff_f [%] fsol [%]
Diffe
renc
e fr
om F
uel-O
nly
[%]
Annual Performance Comparisson Between Hybrid And Fuel-only Engines
SS_FRS
SS_FRS&DFR
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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INTRODUCTION
o Hybridization
o Modelling
PERFORMANCE STUDIES
o Gas Turbine Configurations & Hybridization Type
o Design Specifications & Operating Scenario
o Fuel-Only Engines Solar Retrofitted (FRS)
o Engines With Solar-Only Operation At Design (SDP)
DUAL FLUID RECEIVER
SUMMARY & CONCLUSIONS
Contents
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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Developed Solar Library to enable solar hybrid GT cycle modelling
Studied different gas turbine configurations and hybridization types o Recuperated schemes appear more suitable for solar hybridization o Fuel-only engines solar retrofitted (FRS) show higher specific
power and fuel thermal efficiency compared to solar-only operation at design point (SDP)
o Optimum design between FRS and SDP operation to be established
An alternative to thermal storage for exploitation of rejected power was shown: Dual Fluid Receiver for STIG o Removes energy production penalty o Based on proven technologies (STIG & solar steam production)
Summary – Conclusions
INVESTIGATION OF DIFFERENT SOLAR HYBRID GAS TURBINES AND EXPLOITATION OF REJECTED SUN POWER ASME Turbo EXPO 2016, June 13-17, Seoul, South Korea
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THANK YOU
Laboratory of Thermal Turbomachines
National Technical University of Athens
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