The efficient heat exchanger transfers heat from the micro turbine
exhaust to the micro-CHP heating system circuits.
The EnerTwin has a rapid (< 2mins) start-up capability. Moreover,
power can be modulated down to about 50% without significant
loss of efficiency.
Micro gas turbines
The EnerTwin CHP system generates electric power using a 3kW
micro turbine. Gas turbines are known for their high power to weight
ratio and low maintenance costs. Using off-the-shelf turbocharger
technology leads to low production costs. The turbomachinery
components are optimized for the turbogenerator application.
Driving a high-speed generator at 240,000 rpm, the turbogenerator
has a net electric efficiency of 15% (19% shaft power efficiency).
Together with the low costs, this offers great potential for
cost effective micro-CHP systems. The generator is coupled to the
micro turbine by a unique in-house developed compact rotor concept.
Due to the recuperator, part load efficiency can be kept close
to the design point maximum.
Micro turbines emit only high frequency noise that can effectively
be mitigated. Compared to alternative concepts, the EnerTwin has
very low noise emissions.
Benefits for the environment
The EnerTwin micro-CHP system offers a substantial contribution
to CO2 emission reduction. With MTT’s clean low-NOx combustor,
other exhaust gas emissions levels are minimal.