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The
STM PowerUnit is an engine-generator package that includes...
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an external combustion Stirling cycle
engine
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a propane (LPG) or
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natural gas (town gas) or
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medium or even
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low energy content
fuel-fired combustion system
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an induction generator
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an engine control system
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a weather-protective enclosure with
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integral ventilation system and
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other supporting equipment
for grid parallel operation at 50 Hz, 380/400/415 VAC.
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The PowerUnit can be configured with
different cooling system options; it is engineered for
simple connection to the electrical terminations, fuel
supply inlet and external coolant piping connections,
depending on the available and ordered equipment.
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the complete head including the combuster
more details
> technical data
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Accessories and options
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Power metering Module
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Remote Monitoring
Option (RS485)
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integral/remote
mounted radiator options
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integral liquid/liquid
heat exchanger assembly
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town gas fuel option
(base model)
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propane fuel option
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low energy fuel option
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Power output
The STM PowerUnit operates at a heat rate of 11.766 Btu/kWh (LHV*).
All other data please see page
> technical data
* LHV = Low Energy Content Gaseous Fuel 400 - 590 Btu/scf
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the four cylinder heat engine head "unfolded"
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Efficiency (fuel: town gas)
The package operates with
a net electrical efficiency of > 30%. When utilizing the
recoverable heat with the CHP option, the total efficiency
of the package is > 80%.
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Maintenance
- 10,000 hour maintenance intervals
- 0.4 to 0.5p/kWh
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the complete STM Power Train ...
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Noise
- 66 dBA @ 7 meters with mounted
radiator
64 dBA without radiator
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Warranty
- one year, parts and labour, no
limitation on operating hours
- extended warranties up to five (5)
years available
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... build into a modular frame
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Dimensions
- length 2.570 mm, width 864 mm,
height 1.823 mm
- weight 1.769 kg
both including radiator
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transparent view from front,
click to enlarge
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The STM PowerUnit allows you to take advantage of
energetically complex, delicate, gaseous fuels; but also
devices to burn liquid fuels such as palm oil are under
development and soon we hope to be able to introduce methods
to use heat flows to run the PowerUnit..
The STM PowerUnit will be ideal
when it comes to take advantage of such fuels; for the
possible levels of contaminations please see above document. Existing
Sewage and Biogas Plant operators running conventional
internal combustion engines will be the clientele to target;
in addition we are working together with a number of
companies in order to introduce a gasification unit
(carburettor) which will be able to gasify for example residues from forest felling and produce power
and heat directly.
As a result we will be able to market a portable power
plant, using renewables, only, with an output of app. 0.4MW
of electric power and 0.6MW of heat per year – easily
operated –
sttet up
where energy is needed.
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STM PowerUnits have been designed to achieve > 30% net
electrical efficiency and > 82% total system efficiency in
a combined heat and power (CHP) mode.
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STM PowerUnits are capable of continuous operation with
simple maintenance at 10,000 hour intervals.
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STM Stirling cycle technology is scalable to larger
applications.
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STM PowerUnits meet the 2003 California Air
Resources Board (CARB) regulations for NOx emissions.
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The products of combustion never come into contact with
any moving parts, improving reliability and reducing
maintenance.
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STM PowerUnits have less than half the number of parts
of a typical internal combustion engine.
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Very low noise and vibration.
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Unprecedented fuel flexibility
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Will be able to operate using an external heat source instead of
fuel
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transparent view from rear,
click to enlarge
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more details
> technical data or
> back to top
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