Turbine Charger

advanced batteryMicroturbines produce both heat and electricity on a relatively small scale by means of combustion. In general, they offer advantages compared with other technologies for small scale power generation

Those advantages over reciprocating engine generators include: a small number of moving parts; compact size; light weight; greater efficiency; lower emissions; and the ability to operate with a range of fuels (eg CNG and bio-fuels). Waste heat recovery may be employed with these systems to reach very high efficiencies.

The majority of a microturbine’s waste heat is contained in its relatively high-temperature exhaust. The combined thermal electrical efficiency of microturbines in cogeneration applications where exhaust heat is utilized reach over 80%.

Turbines offer a high-powered engine in a very small and light package. This is facilitated in part due to the fact that there is no requirement for either water-cooling or exhausts catalytic conversion. However they have a time lag and provide poor fuel efficiencies at low speeds if integrated into conventional propulsion drivetrains.

EREV (Extended-Range Electric Vehicle) hybrids utilizing turbines as the on-board charger will provide all the advantages, as the battery will address the variable power requirements and the turbine will be operating at its “sweet spot”.

In simulation exercises, we have found that the fuel costs for ICE-powered EREVs in typical urban environments will be up to 50% more expensive than those powered by micro-turbine on-board chargers.

The ETVM patent-pending mictroturbine design is expected to outperform the state-of the art microturbines for the following reasons:

The characteristics of the prototype and production ETVM microturbines are presented in the following table.

P1 P2 Production
Power kW 12/45 13/48 20/60
Efficiency % 37-38 38-44 45-50
Weight Kg 120 100-110 100-120
Rotational Speed RPM 80,700 80,700 TBD
Turbine Inlet Temp 0C 975 1,050 1,250-1,350
Recuperator Advanced Metal Ceramic Ceramic
Turbine Metal Metal Ceramic

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