Hybrid Car – More Fun with Less Gas

simple stirling hot air engine made at home with simple tools ,2 cans a baloon - Page 34

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Posted by Rick on February 19, 2012, 11:48 pm

Another clip says that this model from 50 years ago was ready for
production, which obviously never materialised, although one would have
thought that any technical problems which prevented it from happening (after
all it was up and running and looks pretty cool even now) could have been
ironed out in the period of half a century, but obviously not.


Posted by harry k on February 20, 2012, 5:12 am

Major problems with it back then were very poor mileage and poor
engine response when called upon for acceleration.  Some of it
probably could have been ironed out with more engineering but I doubt
any practical turbojet could have been made competitive with the IC in
passenger car applications.

I know that there were none sold but don't recall if they were just
given to people to test or were leased to them.

Harry K

Harry K

Posted by News on February 20, 2012, 8:36 am
 harry k wrote:

The microturbine is being looked at running at its high revving sweet spot
(approx 30,000 rpm) turning only a genny.  Then the vehicle is driven by
electric motors.

"The bus, which features a C30 Capstone MicroTurbine, is called "library
quiet" because it is 75 percent less noisy than traditional buses. In
addition, the microturbine-powered bus is 100 percent more fuel efficient
than standard diesel buses, "


Take a ride in one:

Posted by News on February 20, 2012, 9:31 am
 Rick wrote:


Microturbines for CHP (cogen)

"Four Seasons Hotel first Philadelphia business to install energy-efficient
microturbines. To gain control of energy costs and reduce greenhouse gas
emissions, the luxurious Four Seasons Hotel Philadelphia installed three
Capstone C65 ICHP MicroTurbines®. The natural gas microturbines are located
on the roof of the five-star hotel. Within the first two months of
operation, the hotel reduced its energy cost by more than US$0,000. The
microturbines' combined heat and power (CHP) technology allows the hotel to
generate nearly 200kW of electric power, which fulfills 30% of the hotel's
overall electricity needs. Heat from the microturbines is used to heat water
for laundry and other hotel operations. The energy-efficient CHP system
provides 100% of the building's day-to-day domestic hot water and satisfies
15% of its heating needs. The project is expected to reduce the hotel's
annual energy costs by 30%."


I see no obvious reason why these cannot be scaled down and in domestic
homes - in a nice case at the back.  With turbines it is easy to capture all
waste heat, as it is in the exhaust.

They double the mpg when used in busses compared to diesel engines.

Jaguar are to produce a microturbine hybrid supercar.

Posted by News on February 20, 2012, 10:34 am
 Rick wrote:

That was the Rover P6 adapted for a direct drive jet engine.  The car was
built from 1962 to 1976, using a discontinued Buick 3.5 litre aluminium
engine, changed by Rover to their needs.

Spencer King designed its successor, the advanced for its time, the Rover


It has been ironed out, in using microturbines (microturbines  produced
electricity, pure jets thrust) as constant speed generators to supply
electricity to electric driving motors in hybrids.  Capstone, etc, are using
it "now".  The advancement in batteries and supercapacitors makes all this
now feasible.  The battery bank acts as buffer - microturbines are highly
fuel inefficient to on idle, as US tanks found out.  The energy buffer means
the microturbine can be shut down when it become inefficient to run it.


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