This replay that may concern any one, in regard to operate AC compressor
it depend how compressor is set up, if it happen to be belt driving
you can use any motor power by NAT, gasoline or diesel it depend what you
and what you looking for, many years ago in 50s I got acquainted with
and absorption Refrigerators and at that time I did not know what "F" I was
but when you need something you get to learn hard way by doing and some time
dangerous stupid things that I would not care to do it again.
Question is if AC compressors can be powered by nat-gas hell yes "but do you
really want that"
of Baal wrote:
Years ago I worked on a multi door cooler for a convenience store that
was an open drive R12 unit using a Ford automotive AC compressor. I
think those old compressors were manufactured by BorgWarner. It was
identical to what was under the hood of Ford vehicles at the time and
it worked very well. Oh yea, it used a conventional single phase
electric motor that was either 3 or 5 horse power I don't think it was
home made either. ^_^
The problem with using a natural gas motor to drive a compressor is it is
very mechanical and would break often. You substitute lower energy costs
(if any) for increased maintenance.
That was my premise for starting this thread. Where I am so far on this is
that the natural gas chiller technologies like Robur - while low-maintenance
and very reliable - are probably much less efficient than a modern electric
mini-split design. I could not find a SEER rating for the air heat pump
natural gas Robur unit, but figure maybe 17 SEER versus something around 23
to 25 for a Mitsubishi mini-split.
How much cheaper is natural gas than electric, once you add back all of the
regulatory fees that utilities usually add to the raw gas costs? Is it
cheaper enough to overcome the loss of efficiency?
Of course you can drive an open (direct or belt driven) compressor with any
motive power as you said, but for those thinking of such a system should be
aware of seal leaks.
Seal on open compressor need oil on them to seal and if the compressor is
not run for a fairly long period the seal leaks, and you lose refrigerant.
This is the reason automobile air conditioners should be run once a week
The talk here was of domestic air conditioning.
On commercial stuff with combustion engine driven system , I started up a
large system for the separation of gas and oil on a oil and gas field. It
had a gas (natural gas not petrol) engine driving a screw compressor. I put
9 ton of propane refrigerant in the system.
On 5/14/2012 12:24 AM, firstname.lastname@example.org.Sword of Baal wrote:
Actually you didn't. N.gas AC units run cheaper then electrical units.
The initial expense of the equipment was its downfall. The N.Gas
companies subsidized the installation for years and was reimbursed by
the Federal Government. A HVAC and Plumbers Union Lawsuit claiming
unfair subsidized competition ended that. Now the N.Gas utility
companies can no longer sell equipment or repair it. NoHVAC company
wanted to take up the slack and sell/service Absorption A/C..Thus it
died. The N.Gas Utility companies are still subsidized by the Federal
Government in America.
I gave you the gas usage of a around a 5 ton unit.
You keep raving it is cheaper to a domestic absorption air conditioning
units than an electric unit. so prove it. (Super cheap you said)
You were talking about how cheap it is to run, that is not the install costs
So prove your statement about how cheap they are too run.
As usual with raver who do not know what they are talking about like you,
they try madly to cover up when they cannot prove what they sprouted
You said it, now post the numbers and a URL to prove it or shut up
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