What is a micro gas turbine?
Micro-gas turbines are small combustion gas turbines with power output ranging from 30 kW to over 200 kW. Hence micro-gas turbines often operate at very high shaft speed (up to 100 000 rpm) and use electronic power inverters for power conditioning to generate a.c. voltage and at grid frequency.
What is a MicroTurbine system?
Microturbines are a relatively new distributed generation technology being used for stationary energy generation applications. They are a type of combustion turbine that produces both heat and electricity on a relatively small scale. Microturbines work like jet engines but produce electricity instead of thrust.
How do microturbines work?
In micro turbines, the compressor draws the air into a recuperator, which acts as an air-to-air heat exchanger, recovering the heat from exhaust gas. Heating of the combustion air increases the micro turbine’s electric efficiency. The heated air is passed into the combustor chamber, into which fuel is also injected.
How efficient is a Tesla turbine?
The turbine efficiency (defined as the ratio of the ideal change in enthalpy to the real enthalpy for the same change in pressure) of the gas Tesla turbine is estimated to be above 60 percent. The turbine efficiency is different from the cycle efficiency of the engine using the turbine.
Can a Stirling engine power a home?
One of the best applications of Stirling engines is to make electricity while also capturing the waste heat and using that to heat water. This can be done for domestic use or for a commercial application such as a laundromat.
What happens when grid frequency drops?
High power demand, low energy availability If we feed in too little to meet demand, the frequency drops. This is because, if the frequency falls too much, the power plants switch off one after another, until there is a complete collapse of the grid, i.e. a power blackout.
Are microturbines efficient?
Efficiency. Microturbines have around 15% efficiencies without a recuperator, 20 to 30% with one and they can reach 85% combined thermal-electrical efficiency in cogeneration.
Why is Tesla turbine not used?
A Tesla turbine has the disadvantage of having to rely on friction interaction between a smooth surface and a fluid. This weak friction does not create very high torque, which makes a Tesla turbine useless for any application that requires that high torque (such as power generation).