Re: Loss of engine power to air conditioning?

The message from "DervMan" contains these words:

Both, I suspect. He's probably one of these people who's studied.

Err that won't improve your effeciency either, just your cooling capability,

you won't get any brownie points for top posting either :)

see the post, 2 posts up from this one ;)

As opposed to your ranch?

Wonder what you refinish. Cutting new treads on old tyres, perhaps?

BTW, you might find some of the information below of use on how to post to newsgroups.

The message from "Dave Plowman (News)" contains these words:

More likely all the jobs he's screwed up through not really understanding and had to do again.

Guess what?

You're talking complete and utter bollocks.

Superb!

Should have put at the bottom:-

Heat extraction is not measured in watts:

You're a Bright. You've heard of BTU's?

Refinish King

PS If you add more area/refrigerant to a system. you get more efficiency.

err yes it is , they're easily converted between. & more area gives you more effeciency , more refrigerants irrelevant, unless you're dumb enough to not fill the system.

message

No you numpty, but watts is the power needed to extract the heat.

But go on, explain yourself out of this lack-of-knowledge hole, we're all waiting...

No, I've never heard of the British Thermal Unit.

Would you indulge me with a definition of it?

And one of the watt?

One of the what?

Sorry, couldn't resist.

While I agree Refinish Man isn't making much sense, the above statement is incorrect too. For a compressor driven cooling system, the amount of heat transfered does have a direct relationship to the amount of energy used, however it is not equal.

Consider the case of home heating and cooling. If the energy in equated to the heating/cooling, instead of many homes using heat pumps, they might as well use electric heat, as that system is simple and it converts virtually 100% of the incoming energy into heat. Put that same energy into a heat pump system and you get far more heating or cooling.

These pump systems, like auto air conditioning, are not creating heating or cooling from the energy in, rather they are moving heat around, from one place to another. That's why, for example, a geothermal system can use up to 50% less energy. It does this because it uses the earth as a constant temp source or sink for heat. In the case of an auto, the pump is moving heat from the car interior, to the air outside.

What you also have to take into account on a car is that the AC heat exchanger (condenser) is likely not to be well cooled by the surrounding air under all conditions, and will often need help from both the engine fan and an auxiliary electric one. This energy consumption must also be taken into account when working out the total amount used by the AC.

In message , "Dave Plowman (News)" writes

Obviously T2000 will now be lobbying to slap ludicrous speed limits on trains then?

I think I need a crowbar, my tongue appear to be stuck in my cheek.

The message from "DocDelete" contains these words:

Nah, easy - Gaia huffs and puffs a bit and bingo - ozone to go.

temprature can be cold as well :) maybe that will answer his questions :)