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Yeah, Joe. I have an oil cooler core sitting
on my side of the firewall that extracts heat from the coolant
system. However, the small amount of heat its capable of extracting
is so small compared to the thousands of BTU of heat you need to get rid of each
minute from a flying rotary that the effect on cooling is
nil.
I know folks have turned on their heaters to save
an over heated auto engine - but, those engines were not being operated at
high power settings if they were having cooling problems.
In fact, if you were able to come up with something
that extracts significant amounts of heat - it would quickly broil the occupants
of the cockpit {:>).
Not trying to discourage you, Joe, but I do believe
that for it to be worth the weight and complexity that it would have to extract
at least 10-15% of the coolant waste heat. If you are pulling 160 HP you
need to dump approx 5000 BTU/min through the cooling system. So 15% of
5000 = 750 BUT/min. Now if my Units converter is correct that about to
13.17647 Kilowatts. I think that would get a cockpit a mite
warm in a hurry.
Even if you are cruising at a more realistic 110 HP
and only taking 10% of the coolant heat load then that would be 10% of 3362
BTU/min = 336 BTU/Min = 5 Kilowatts so that would be like having 5 hair dryers
on full hot blowing air into the cockpit. Again, might get a bit
warm. Now of course, you could have a valve to control the flow of hot
coolant and maintain a more reasonable cockpit temperature - but then there
would not be much engine cooling benefit. At least that is the way it appears to
me based on what I understood from your description.
Just my $0.02
Ed
----- Original Message -----
Sent: Monday, March 06, 2006 12:23
PM
Subject: [FlyRotary] Heaters
Has anyone designed a separate system that
extracts heat from the engine compartment or components to heat a fluid in a
separate system using a heat exchanger to dump the heat into the cabin and a
separate pump? This way you are not making this system part of the
engine cooling system and can run lower pressure and be able to shut it
off without affecting the engine system. I was thinking of a device
that subarus had sandwitched between the oil filter and the block. Any
thoughts?
Joe Berki
Limo EZ
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