“Delivering cleantech energy solutions for a
sustainable future, now.”
US Renewable Energy Consumption by Source
Quadrillion Btu’s
DOE/EIA Annual Energy Survey, 2006
1) 24.7 Quads of energy used by industry…of this 20% to 50% is lost in the form of waste heat (DOE)
2) Conventional hydroelectric power.
3) Fuel ethanol and biodiesel consumption, plus losses and co-products from the production of fuel ethanol and biodiesel.
4) Municipal solid waste from biogenic sources, landfill gas, sludge waste, agricultural byproducts, and other biomass. Through 2000, also includes non-renewable
waste (municipal solid waste from non-biogenic sources, and tire-derived fuels).
©ElectraTherm, Inc. 2008
ElectraTherm’s technology captures this recoverable heat to
drive generators that make electricity with zero emissions.
©ElectraTherm, Inc. 2008
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Twin Screw Expander
At the heart of all ET’s
systems is a positive
displacement twin screw
expander with the “N” Rotor
Profile - Patented by City
University, London and
licensed to ElectraTherm.
©ElectraTherm, Inc. 2008
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LOW PRESSURE VAPOR
HEATED PRESSURIZED VAPOR
HEAT SOURCE IN >>
Under pressure,
the vapor is
forced through
the screw
expander,
turning it to spin
an electric
generator
The vapor is cooled and
condensed back into a
liquid in the condenser
Surplus heat captured by the
evaporator is used to “boil”
the working fluid into a vapor
<< HEAT SOURCE OUT
HIGH PRESSURE LIQUID
<< COLD SOURCE IN
The working
fluid is pumped
to higher
pressure and
returned to the
evaporator to
repeat the
process
COLD SOURCE OUT >>
LOW PRESSURE LIQUID
ET’s Products are:





innovative
economical
reliable
green
available now
©ElectraTherm, Inc. 2008
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ET Power Systems
7’
©ElectraTherm, Inc. 2008
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Scalable
from 30kW – 500kW
©ElectraTherm, Inc. 2008
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Modular & Self-Contained
Running in parallel, ET systems can be part of a larger generating solution where
individual units can be taken off-line without affecting the performance of any other unit
or the system as a whole.
©ElectraTherm, Inc. 2008
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ElectraTherm Waste Hest Generator as a
Small Geothermal Power Plant
Expansion of Pressurized Vapor
Produces Mechanical Power
Generator Rotation Produces
Electricity
Heat Pressurized Vapor
E
v
a
p
o
r
a
t
o
r
Expander
Refrigerant
Loop
Generator
Low Pressure Vapor
Condenser
Feed Pump
Receiver Tank
Low Pressure Liquid
Reinjection well
©ElectraTherm, Inc. 2008
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ElectraTherm Waste Hest Generator as a Bottom
Cycle to Existing Geothermal Power Plant
Turbine Generator
= electricity
Expander &
generator
= more electricity
Evaporator
Condenser
Feed Pump
Receiver
Tank
©ElectraTherm, Inc. 2008
Cooling
Tower
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Available Now
ET’s fuel-free, emission-free power systems are available now.
Capacity = 15,000 expanders annually
©ElectraTherm, Inc. 2008
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To qualify, a site needs:
 Recoverable heat: ≥200°F liquid, ≥400°F
gas, 400°F – 1000°F exhaust
 Cooling Source: water <80°F, air <90°F
 Management with a desire to:
•
•
•
reduce emissions to power ratios,
increase plant efficiencies,
net greater profit.
©ElectraTherm, Inc. 2008
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Summary
ET Power Systems:
•
•
•
•
•
•
•
•
Recycle wasted energy to make electricity.
Are fuel & emissions free.
Are scalable in size & flexible with heat and condensing
Reduce emissions to output ratios.
Increase power output to fuel ratios.
Payback in 2 years, approx.
Are modular and require a small footprint.
Tie in to existing heat & cooling flows without interrupting
current industrial processes or electrical production.
©ElectraTherm, Inc. 2008
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