Hi,

has anybody heard about any company making microturbines of
5-6kW? I would be grateful for any help.

regards,

Marcin

Hi,

has anybody heard about any company making microturbines of 5-6kW?
I would be grateful for any help.

regards,

Marcin

"Marcin Pyc" <pycmarcin@poczta.onet.pl> wrote in message
news:f248daed.0312020840.67f1e67a@posting.google.com...
Hi,

has anybody heard about any company making microturbines of
5-6kW? I would be grateful for any help.

Capstone has one at 30kW. 5-6 kW is basically car turbocharger sized,

with a low pressure ratio and a large recuperator you might achieve 15%
efficiency, though it would not be light weight, (the heat exchanger is
heavy).

Turbochargers can often be made to run as gas turbines without
recuperators, though they barely produce enough power to overcome their
own losses.

Turbines can be made smaller than this though not
functioning gas turbines, efficiency starts to drop right through the
floor at this scale.

"Pete Lynn" <pete@peterlynnkites.com> wrote in message
news:<1070673023.904169@kyle.snap.net.nz>...
"Marcin Pyc" <pycmarcin@poczta.onet.pl> wrote in message
news:f248daed.0312020840.67f1e67a@posting.google.com...
Hi,

has anybody heard about any company making
microturbines of 5-6kW? I would be grateful for any help.

I just posted a response to your initial when I saw this response
to you. Are you interested in efficiencies or just generation?
In otherwords whats your application?

Capstone has one at 30kW. 5-6 kW is basically car
turbocharger sized,

Not quite. I worked for Honeywell (was AlliedSignal then) in
their APU testing department. We regularly generated 3.5 -
6KW on small APU's.
However, they usually ran at 400 and 600 Hz, not the 60Hz
coming out of the wall socket at home.

with a low pressure ratio and a large recuperator you might
achieve 15% efficiency, though it would not be light weight,
(the heat exchanger is heavy).

Course that would depend on the construction and materials
used.

Turbochargers can often be made to run as gas turbines
without recuperators, though they barely produce enough
power to overcome their own losses.

Having built quite a few of these I can say that you are pretty
much Wrong. I pushed a go-cart around with a T04 car turbo'd
engine. A little slow at first but it did get moving given enough
distance.

Course it wasn't until I got that T18 Kenworth turbo that I got
that Jet Fighter like performance I was looking for.

Turbines can be made smaller than this though not
functioning gas turbines, efficiency starts to drop right through
the floor at this scale.

Well, There's a guy in Tempe Arizona who would argue with you > on
that considering he has a turboprop engine that is half the size
of an auto T2 turbocharger.

There is also a whole field of R/C Modelers who fly jet powered
R/C's using turbo based engines.

Now are the efficiencies all that great - heck no - but not
everyone is all that concerned about the efficiency.

pycmarcin@poczta.onet.pl (Marcin Pyc) wrote in message news:<f248daed.0312020840.67f1e67a@posting.google.com>...
Hi,

has anybody heard about any company making microturbines of 5-6kW?
I would be grateful for any help.

regards,

Marcin

Greatings,

Look at surplus Garrett APU's starting with the 30-51, 30-67, 30-92,
36-6, 36-16, 36-50, 36-55, 36-100 and 36-150 series. As APU's and
ground power units they run from about 5Kw for the 30-51/67 up to
about 10Kw for the 36-150's. There are the 85 series APU's by
Garrett/AlliedSignal/Honeywell and larger.

There are also the Sundstrand APU's and Solar (company name, before
Sundstrand bought them out) Turbines and Tierney Turbines. Williams
Research (now owned by Rolls Royce)may make something along that line.

Good hunting.

Mike