Elec Pwr Conf Baltimore 2012 5-17-2012 SJ FINAL

Combined Heat & Power with Spinning
Reserve (CHP-SR):
Helping the utility profitably meet
renewable power mandates
Suresh Jambunathan
Recycled Energy Development LLCRecycled Energy Development, LLC
Ph: 630-335-4544
E-mail: sjambunathan@recycled-energy.com
14th Electric Power Conference Baltimore MD14th Electric Power Conference, Baltimore, MD
May 17, 2012
RED | the new green www.recycled-energy.com

Overview
Macro power supply trends and intermittent renewable energy
Why is Combined Heat & Power with Spinning Reserve (CHP-
SR) a powerful solution?
CHP-SR: what's needed to commercialize?

Recent "Power Engineering" headlines
WIND up
SOLAR up
GAS up
COAL down

The shift is all over the map

Economics, policies and politics are
powering this trendp g
Nat. Gas ($/MMBtu) at Henry Hub, 5-9-2012
Power Eng, May 2012

Energy waste at a coal fired remote grid
Electric Generation Plant. Craig, COElectric Generation Plant. Craig, CO
• Two-thirds of the fuel’s energy is vented to atmosphere
• Coal is widely perceived as a polluting fuel.

Hence the "argument" for Renewables:
What's not to like?What s not to like?
Renewables Supply Renewables Storage
Wind Batteries
Solar Flywheels
Geothermal Compressed Air
Tidal
Hydro Pumped Hydro
7

In one phrase… "predictably unpredictable"!
R bl l
r,MW
Renewable power supply
Power
Time (hr day week)
Power demand
Steady demand Vs fluctuating supply
Time (hr, day, week)
Steady demand Vs fluctuating supply

Terminology
• Heat Rate (HR):
• Energy consumed / power generated• Energy consumed / power generated
• Electric HR >= CHP HR >= Net Economic HR
S i i R G T bi (SRGT)• Spinning Reserve Gas Turbine (SRGT):
A Gas Turbine that continually varies power output to balance variable
renewable power generation
• Combined Heat & Power with Spinning Reserve (CHP-SR):
• SRGT operating in CHP mode
• The CHP-SR system is thermally matched and normally operates at• The CHP-SR system is thermally matched and normally operates at
reduced gas turbine power output
• On grid operator command, the gas turbine continually varies power
output to balance renewable power generation

Current situation: Separate and wasteful supply
of thermal energy & Spinning Reserve electricityof thermal energy & Spinning Reserve electricity
f f
Gas: 100
MMBtu/Hr
Boiler
Eff = 80%
Steam: 80 MMBtu/Hr
A. Refinery boiler satisfies site steam load
Gas: 140 25 MW SRGT 10 MW Gas: 250 25 MW SRGT 25 MW
B. Spinning Reserve gas turbine balances renewable power supply
Gas: 140 25 MW SRGT
HR = 14,000
10 MW Gas: 250 25 MW SRGT
HR = 10,000
25 MW
GT power cycles
40% to 100%
GT Eff ~ 24% GT Eff ~ 34%
I ffi i t ti
RESULTS:
Total Nat Gas 240 350 MMBtu/Hr
G % G 3 %
Inefficient operation
Total Nat. Gas 240 - 350 MMBtu/Hr

CHP-SR is a "powerful" alternative: Grid
continually ramps Gas Turbine output toy p p
balance renewable power supply
A A il bl SR 15 MW ( ) B A il bl SR 0 MW
*HRSG incl. LTE
Q 76%
Steam: 80 MMBtu/Hr *HRSG incl. LTE
Q 49%
Steam: 80
A. Available SR = 15 MW (25 - 10) B. Available SR = 0 MW (25 - 25)
25 MW SRGT
140 10 MW
105
Qabs ~ 76%
25 MW SRGT
250 25 MW
164
Qabs ~ 49%
HR = 14,000 HR = 10,000
GT power cycles
40% to 100%
CHP Eff ~ 82% CHP Eff ~ 66%CHP "dividend"
Fuel & GHG emissions saved: 41% to 28%
CHP-SR is an instantly available virtual energy storage system
CHP SR is an instantly available, virtual energy storage system
* HRSG: Heat Recovery Steam Generator; LTE: Low Temperature Economizer

CHP-SR's superior heat rate manifests as fuel
savings and… reduced GHG emissions
e
savings and… reduced GHG emissions
140%nameplate 140%ate,%of
CHP-SR "dividend"100%
HeatRa
60%
GT output, % of nameplate30% 100%
CHP SR incremental Heat Rate ~ 7 MMBtu/MWHr

CHP - SR benefits multiple stakeholders
BENEFIT to GRID
• Grid stability ==> increase renewables share of generation fleetGrid stability > increase renewables share of generation fleet
• Avoid stand-alone SR gas turbine costs - CapEx, OpEx and fuel
• Keep thermal host as power customer
• Other:
t• ramp rate
• active power factor support
• reduced line losses
BENEFIT to THERMAL HOST (REFINERY)
• Reduced cost steam
• Reliable power supply
BENEFIT to SOCIETY
• Minimize GHG emissions,
R d ll ti• Reduce pollution
• Sustainable energy supply

Policies to advance CHP-SR
Qualify CHP-SR recycled energy projects for renewable efficiency
standards by recognizing the virtual energy storage benefits providedstandards by recognizing the virtual energy storage benefits provided
Grid operators offer long-term contracts and pay for the incremental
costs of added generation on pass-through basis
Allow CHP-SR developers to capture value of grid avoided
investments in Transmission & Distribution and also other benefits
like local power factor supportp pp

Energy recycling projects: What's required?
Technical & Environmental
H t i d t i lHost industrial processes
Power generation
Waste heat recovery & reuse
Legal & Regulatory
Long-term contracts
Electricity regulationsElectricity regulations
Financial
F t iFocus on core competencies
Refineries may lack resources to design, build, fund and operate energy
recycling facilities – a non-core business
Grid operators may lack skills to recycle otherwise wasted energy
Grid operators may lack skills to recycle otherwise wasted energy

Thank you for your interest. Questions?
CHP - SR benefits multiple stakeholders
• Grid / local utility
• Thermal host (eg: Refinery)
• Society
CONTACT:
Suresh Jambunathan
h 630 335 4544phone: 630-335-4544
e-mail: sjambunathan@recycled-energy.com
URL: www.recycled-energy.com

Elec Pwr Conf Baltimore 2012 5-17-2012 SJ FINAL

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