We are getting ready to test some of the components of a turbo compound
engine. What we plan to do is install a gear box on a turbo charger mounted
on an engine and connect the output of the gear box to a generator to act as
a turbo charger dyno if you will. We want to make sure the gear box works.
We will also instrument the turbo charger for TIT and RPM.

The air output of the compressor will
be connected to a valve to simulate the intake system. In other words the
engine will not be turbo charged. We are merely using a normally aspirated
engine to drive the turbo charger.

This is done to prevent a turbo charger
turbine or bearing failure from generating scrap aluminum that will find its
way into the engine.
We don't want to be overhauling the engine every time a turbo charger fails.

My problem is: what do I use for a generator that will handle 50 HP or 37
KW.
Also what do I use for a load.
I could use 37 one KW electric room heaters.

Anybody have any ideas?

Paul Lamar


--
Have you thought about daisy chaining a couple of water
pumps together with a 55 gal drum of water.  Not sure
how much HP it takes to turn one but it might be
easier than a generator and trying to dump the
energy and heat.

Mike C.

The stock Mazda pump draws about 3 HP.
McMaster Carr has a 316 SS pump that will absorb
5 HP at 3450 RPM. 1/2 HP at 1725 RPM.

That might do the job at 6000 RPM. Cost is $550.
120 GPM. Sounds like a full blown water brake dyno.
In that case you need a small swimming pool or the
water starts boiling real quick if you just recirculate
through a restricter valve. A 55 gallon drum might do
the job if the water goes through a heat exchanger.
(car rad and fan).

Paul Lamar


Just like your other dyno Paul?  Use a prop to measure the e-shaft
torque and another prop to measure the turbocharger torque.

Or, use a helical cut gear in the reduction from the turbine speed to
the e-shaft speed and use a hydraulic throw out bearing to calculate
torque (and hence power).

You've had lots of good ideas Paul..  Why are you trying to put an
electric motor and load in there??  :)


Matt-


Yes I thought of that. I just wanted to see if anybody had
a better idea.

Paul Lamar