Transcript Inverter based Cogeneration Overview by Coffman

by
Coffman Electrical Equipment
April 30. 2015
Allows for simple
integration with renewables
Inverter based cogeneration makes
small scale CHP possible
 Eliminates need for complicated paralleling gear
 Simplifies Utility interconnect, similar to solar




inverters.
Variable speed motor reduces efficiency loses at partial
loads
Ability to stage multiple units
Uses standard automotive style engines simplifying
maintenance.
Allows easy integration with batteries to maintain
voltage stability.
Combined Heat & Power (aka cogeneration)
Definition: The simultaneous production of two useful outputs
(electricity + heat) from a single fuel source
27.0%
Electricity out
100.0%
100 kW
Gas in
1,263,000 Btu/hr
55.4%
Thermal out
700,000 Btu/hr
2-for-1:
“A generator that makes free hot water”
or
“A boiler that makes free electricity”
>82.4%
total
(HHV
basis)
>92.8%
total
(LHV
basis)
Benefits to Site
 ECONOMICS
 Cut energy costs by 30-50%
 Qualify for incentives (utility/ fed/ state)
 Reduce exposure to utility rate volatility
 ENVIRONMENTAL
 Cut carbon footprint by 50%
 Increase efficiency
 Lower emissions
 SECURITY
 Black-start capability (supplemental standby
capacity = “convenience power”)
 Power quality
 Reduce US dependence on foreign oil
Environmental Benefits of CHP:
CO2 Emissions Reductions
GREENHOUSE GAS EMISSIONS FROM: 'SAMPLE TECOGEN INV-100
INSTALLATION'
1,400
49%
Reduction
1,200
1,000
tons CO2/ year
489
800
by site's
Tecogen
unit(s)
600
by site's
boiler
400
695
608
200
0
without
TECOGEN
with TECOGEN
by utility
power
plant
With TECOGEN
INV-100, 576
fewer tons of
CO2 are emitted
each year, by
'SAMPLE
TECOGEN
INSTALLATION'
INV-100 Features
 Qualifies for Standardized
Interconnection
 UL1741 Compliant
 CE Marked for European Use
 Black-Start/Grid-Independent
Operation
 Compatible With CERTS
“Wireless Droop” Control
 Power Quality
 No Reactive Power Use
 Power Boost for Demand-Side
Response
 Enhanced Efficiency
 Low Emissions
 Internationally Adaptable
 50/60 hz
Premium Power Module - Inverter Interface
To Exhaust After Treatment
& Heat Recovery
Inverter
Rectifier
Variable
Frequency
AC
High Quality
3-Phase,
50 or 60 Hz
Power
DC
Optional DC Input
from Auxiliary Device
(solar PV, Battery, Fuel Cell, etc.)
Natural Gas Engine
Amorphous Metal Generator
Delivered kW
Engine/Generator Output
RPM
1000
2200
3000
Volts
98
207
258
Freq (hz)
135
297
405
KW
39
93
130
Power
Conversion
Volts
Freq (hz)
KW
480
480
480
60
60
60
37
88
123
851 4
General Layout
PCS
&
Control
Exh. HR/
Emissions
After-treatment
651 4
 Additional Features
 Water-cooled
Generator/ Electronics
 Large Oil Sump
 New Exhaust HX/
Catalyst Design
 Extra Cat Surface
 Extra SoundAttenuated Enclosure
IC Engine
PMG
Power Electronics/ Generator
Performance
200
100%
Gen. Eff.
180
160
80%
Horsepower or kilowatts
Eng. hp.
140
120
60%
Gen kW
100
80
40%
Excellent part-load efficiency
Eng. Eff.
60
40
20%
20
0
1000
0%
1500
2000
2500
Engine-Generator RPM
3000
INV-100 Part Load Performance
1,300,000
1,200,000
1,100,000
Fuel or Heat (BTU/hr)
1,000,000
Fuel Usage
900,000
800,000
700,000
INV-100 Modulation
600,000
500,000
Electrical
Fuel
Heat Electrical
Overall
Output
Usage Recovery Efficiency Efficiency
(kW) (BTU/hr) (BTU/hr)
(%)
(%)
100 1,262,760 700,000
27.0
82.5
80 991,440 557,800
27.6
83.8
60 751,740 442,100
27.3
86.1
40 541,620 330,720
25.2
86.3
Heat Recovery
400,000
300,000
200,000
100,000
0
40
45
50
55
60
65
70
75
80
Electrical Output (Kw)
85
90
95
100
MICROGID CASE STUDY
THE BREVOORT, a 1950’s era co-op tower in the Greenwich Village section of New
York City, maintained power, water and heat during the wide spread power outages
left in the wake of Superstorm Sandy thanks to Tecogen’s combined heat and power
(CHP) system.
Brevoort CHP
plant consists of
(4) 100kW Tecogen
InVerde units
which provide
heating, domestic
hot water and
electricity for the 20
story co-op condo
building.
MICROGID CASE STUDY
THE BREVOORT, a 1950’s era co-op tower in the Greenwich Village section of New
York City, maintained power, water and heat during the wide spread power outages
left in the wake of Superstorm Sandy thanks to Tecogen’s combined heat and power
(CHP) system.
Brevoort CHP
plant consists of
(4) 100kW Tecogen
InVerde units
which provide
heating, domestic
hot water and
electricity for the 20
story co-op condo
building.
DC based CHP
• These DC based generators are
available in either Natural
gas/propane or Diesel
• Variable speed with Lithium
battery charging integrated in
engine control
• Are available from 6 kw to 26
kw.
• Can be integrated into inverter
packages up to 80 kw.
5kW
Reciprocating Gas Engine
Packaged CHP Systems
25kW
128 – 2,129kW
250 & 333kW turbines
recip. packaged CHP
30kW
60kW
200kW
100 – 400kW
recip. packaged CHP
Absorption Chilling
• 30 tons of cooling
available per 100 kw
of CHP
• Combines heat from
generator and heat
removed from
building into
common low grade
heat source
• This heat can be
reused in other
requirements.
Engine driven
Chillers 50400 tons
•
Recovers waste
heat while
providing Chillers.
• Lower Emissions
than Fuel Cells
• Provides Energy
savings at part load
similar to Variable
Speed Chillers
• Automotive based
engines.
22 ton Engine
driven Heat
pump
• Hot and air cooled
versions
• Brings cooling tower
waste heat to building
distributions system
• COP of 2.2 to 3.1
• Recovers Data Center
Heat.
Microgrid Design
 Micro-grid is the integration of multiple technologies to
provide backup power when grid power is unavailable or
to maximize renewable power as % of total power.
 This same design can allow for the integration of
Cogeneration and renewable heating/cooling systems.
 Allow for net zero application by at little additional cost
through reduction of backup power cost and size.
Integrated CHP, solar PV/thermal
with electric and thermal storage
3300 Jefferson Se
Grand Rapids, Mi. 49548
616-452-8708
www.steadypower.com