Does any one here know what the capacity on the air condition compressor is, for instance when the car runs at 3000 rpm? volume flow or cooling capacity

Kjell

Do you mean displacement of the compressor (year, make and model)?

Do you mean displacement X rpms?

When you say volume flow or cooling capacity, do you mean a a particular make and model (since you handle signed 911 project and this was a 924/944/968 post)?

Cooling capacity is usually stated as tonnage or btu's required, then again you could convert btu's into nanojoules or whatever floats your boat like Bimmer Tinsel University

this is for dimensioning a special condenser, therefore i would like to know the compressor capacity.

volume flow X rpms
or btu @ given conditions and rpm

I have a 911 with a 1986, 930 engine. but compressor capacity on air condition compressor to a car could not have to much variation in capacity?

Kjell

I'm gonna "guess" 10P15..... are typically 150cc's

"compressor capacity on air condition compressor to a car could not have to much variation in capacity".... can you rephrase that?

Sorry i'm Norwegian and can't express my self perfect in English.

Please

the cooling capacity of a air condition compressor that is fitted in a small car like Porsche cold not have too much difference in cooling capacity?

like: if my car have a compressor with cooling capacity of 12000 btu (i don't know the capacity of my AC system) @ for instance +44 deg F/ 115 deg F (R134a) (evp/cds) it could be maximum +/- 10% in difference between the different compressor models?

What is the usual cooling capacity of a standard compressor that is fitted in a Porsche when the car engine runs at 3000 rpm. 10000 btu, 15000 btu, 20000 btu? and what condision is this capacity given at?

I have a turbo engine and the 930 1986 originally have two AC condensers one in rear and one in front. I will not have possibility to use the original rear condenser because of changes in the inter-cooler system. Therefore i will have to make a new special vertical condenser that i will put under the left front fender. I do not want to make this new condenser too small and therefore i want to find out the cooling capacity of the compressor.


Kjell

Looks like we have to open the text books.

You know this was already engineered, well sought of, with the 964. close but no cigar.

On the compressor side: I would guess (again) to say that assuming a superheat around 14-16F, and assuming a suction side pressure somewhere in the range of 23-27 psi, you would have various btu flow rates (k's per hour) at various rpms at various high side pressures..... you curve this stuff. For example say at 3000 rpms you would have near 10k btu at 350 psi, 12.5k btu at 300 psi, 15k btu at 250 psi, and 20k btu at 200 psi... give or take.

As far as the condenser(s) go you have other issues besides tube type and real estate. You have cfm or the limitation of things that make high cfm.

However, right now you may want to think about looking at a different
forum, such as the 911 technical forum where you can find what has already been tried, what works and what does not work, what some think works and what some wish works.... all the works! ... rather than simply doing it with pencil.