November 1-3, 2016 2 Brayton Power Cycle Heat Exchanger ......as waste heat recovery, fossil,...
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Thar Energy, LLC © 2016│ All Rights Reserved For additional information contact: Marc Portnoff, [email protected] sCO 2 Brayton Power Cycle Heat Exchanger Test Facility Abstract The supercritical carbon dioxide (sCO 2 ) Brayton power cycle is adaptable to a variety of heat sources and has higher cycle efficiency compared to traditional power cycles. As such, it is being considered for multiple power generation applications such as waste heat recovery, fossil, concentrated solar power, geothermal and nuclear. A key determinant on power cycle efficiency and profitability is heat exchanger (HX) performance and cost. To evaluate heat exchanger performance, Thar Energy, with funding support from U.S. DOE NETL, has designed a test loop simulating a simple recuperated Brayton cycle. The test facility, under construction, is being sized to evaluate innovative ideas in HX design. PSV PSV 0.141 kg/s 8.46 kg/min Recuperator sCO 2 -sCO 2 MFM Flue Gas 255 bar 30C 87 bar, 370C 254 bar 390C 86 bar, 567C 85 bar, 80C 84 bar, 30C Manual E Stop Combustion Air-sCO 2 Heater HX HX H1 TE_B1 PT_B2 TE_B2 Flow VFD BPR High Pressure Control Large Surge Tank PT_02 TE_02 PT_03 TE_03 PT_01 TE_01 CO 2 Supply 45 bar V--14 PT_04 TE_04 PT_05 TE_05 Burner PT_B1 Blower CO 2 Pump & VFD P1 V--14 Vent Booster Pump P2 Outside Water-sCO 2 Cooler HX Manual BPR Low Pressure Control Baffle Pres. Vessel PT_07 TE_07 PT_06 TE_06 PT_07 TE_07 PT_05 TE_05 Thar Energy manufactures Microchannel Recuperators, Heaters & Coolers for the sCO 2 Power Cycle. The test loop’s focus is on collecting performance measurements to evaluate prototype recuperator, heater HX, and cooler HX. • Heat transfer coefficient • Surface density • Fluid flow pressure drop • Friction factor The system also allows for the evaluation of individual auxiliary sCO 2 Power Cycle components including pumps, filters, valves, sensors and material properties such as corrosion resistance. The main components of the loop include a variable speed sCO 2 pump with mass flow monitor, gas fired heater, and a chiller. A pressure control valve has been incorporated as a substitute for the performance of a turbine, thereby enhancing the system’s operating flexibility at reasonable costs. Reconfigurable Test Loop • Pressures to 275 bar • Temperatures to 700C • sCO 2 mass flow to 10 kg/min Test Loop Flow Diagram • Test thermal performance over a range of operating conditions • Compare actual to predicted performance Test Loop Layout Thar Energy Manufactures sCO 2 Power Cycle Recuperators, Heater HXs & Cooler HXs for Generator Primary Heater Precooler High Temp Recuperator Low Temp Recuperator Compressor Recompressing Compressor Cooling Air Turbine Heat Input Counter-Current Microtube 5.5 MW 2.5 MW Hot Gas–sCO 2 HX Heaters Recuperators Microchannel sCO 2 Gas Cooler Gas Coolers or Water Coolers 316 Stainless & Inconel 625 Inconel 740H Aluminum, Low Carbon or Stainless Steel Typical sCO 2 Recuperated Recompression Brayton Cycle 40 kW Inconel 625 Microtube Heater 100 kW Inconel 625 Microtube Recuperator Tube Bundle 4,500 m 2 /m 3 1,800 m 2 /m 3 Work supported by US DOE NETL under: DE-FE0024012: Seth Lawson, Program Officer DE-FE0025348: Mark Freeman, Program Officer Virginia Tech, Blacksburg, VA November 1-3, 2016 Lalit Chordia, PhD, Ed Green, Marc Portnoff
Transcript of November 1-3, 2016 2 Brayton Power Cycle Heat Exchanger ......as waste heat recovery, fossil,...
Thar Energy, LLC © 2016│ All Rights ReservedFor additional information contact:
Marc Portnoff, [email protected]
sCO2 Brayton Power Cycle Heat Exchanger Test Facility
AbstractThe supercritical carbon dioxide (sCO2) Brayton power cycle is
adaptable to a variety of heat sources and has higher cycle
efficiency compared to traditional power cycles. As such, it is
being considered for multiple power generation applications such
as waste heat recovery, fossil, concentrated solar power,
geothermal and nuclear.
A key determinant on power cycle efficiency and profitability is
heat exchanger (HX) performance and cost.
To evaluate heat exchanger performance, Thar Energy, with
funding support from U.S. DOE NETL, has designed a test loop
simulating a simple recuperated Brayton cycle. The test facility,
under construction, is being sized to evaluate innovative ideas in
HX design.
PSV
PSV
0.141 kg/s
8.46 kg/min
RecuperatorsCO2 -sCO2
MFM
Flue Gas
255 bar
30 C
87 bar, 370 C
254 bar
390 C
86 bar, 567 C
85 bar, 80 C
84 bar,
30 C
Manual
E Stop
Combustion
Air-sCO2
Heater HX
HX H1
TE_B1 PT_B2
TE_B2
Flow
VFD
BPR
High Pressure
Control
Large
Surge
Tank
PT_02
TE_02
PT_03
TE_03
PT_01
TE_01
CO2 Supply
45 bar
V--14
PT_04
TE_04
PT_05
TE_05
Burner
PT_B1Blower
CO2
Pump
& VFD
P1
V--1
4
Vent
Booster
Pump
P2
Outside
Water-sCO2
Cooler HX
Manual
BPR
Low
Pressure
ControlBaffle
Pres.
Vessel
PT_07
TE_07
PT_06
TE_06
PT_07
TE_07
PT_05
TE_05
Thar Energy manufactures Microchannel Recuperators,
Heaters & Coolers for the sCO2 Power Cycle.
The test loop’s focus is on collecting performance
measurements to evaluate prototype recuperator,
heater HX, and cooler HX.
• Heat transfer coefficient • Surface density
• Fluid flow pressure drop • Friction factor
The system also allows for the evaluation of
individual auxiliary sCO2 Power Cycle components
including pumps, filters, valves, sensors and material
properties such as corrosion resistance.
The main components of the loop include a variable
speed sCO2 pump with mass flow monitor, gas fired
heater, and a chiller. A pressure control valve has been
incorporated as a substitute for the performance of a
turbine, thereby enhancing the system’s operating
flexibility at reasonable costs.
Reconfigurable Test Loop
• Pressures to 275 bar
• Temperatures to 700 C
• sCO2 mass flow to 10 kg/min
Test Loop Flow Diagram
• Test thermal performance over
a range of operating conditions
• Compare actual to predicted
performance
Test Loop Layout
Thar Energy Manufactures sCO2 Power Cycle
Recuperators, Heater HXs & Cooler HXs for
Generator
Primary
Heater
Precooler
High Temp
Recuperator
Low Temp
Recuperator
Compressor Recompressing
Compressor
Cooling
Air
Turbine
Heat Input
Counter-Current
Microtube
5.5 MW
2.5 MW Hot Gas–sCO2 HX
Heaters
Recuperators
Microchannel
sCO2
Gas
Cooler
Gas Coolersor Water Coolers
316 Stainless & Inconel 625
Inconel
740H
Aluminum,
Low Carbon or
Stainless Steel
Typical sCO2 Recuperated
Recompression Brayton Cycle
40 kW Inconel 625
Microtube Heater
100 kW Inconel 625
Microtube Recuperator
Tube Bundle
4,500 m2/m3
1,800 m2/m3
Work supported by US DOE NETL under:
DE-FE0024012: Seth Lawson, Program Officer
DE-FE0025348: Mark Freeman, Program Officer
Virginia Tech,
Blacksburg, VA
November 1-3, 2016
Lalit Chordia, PhD, Ed Green, Marc Portnoff
