air conditioning aero drag and heat flux to radiator
 

* typically, the air conditioning condenser coil is placed upstream of the radiator. It's aerodynamic drag is present whether or not the system is operating, depending upon active thermal management of the cooling system, while at rest, under artificially-induced airflow, or dynamic pressure-induced flow.
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* engine / motor cooling load, battery cooling load, and climate control heat rejection must all be handled by the cooling system.
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* climate control must satisfy full passenger metabolic heat flux, any engine compartment firewall conduction, non-glazed exterior surface heat conduction, and glazed surface, direct solar greenhouse effect and infrared radiation at full-sun, peak Summer heat, at Furnace Creek, Death Valley, California, USA ( typically 120-F ), at 'idle', parked, with all accessories 'ON,' to a specified thermostat setting.
* electric forced-air power consumption must be part of the vehicle's energy accounting.

Yes, but what's your point?

point
 

You're kidding, yes?

Nope. I am just not sure what it has to do with anything.

1. The air con condenser causes aero drag.
   
2. The air con condenser needs to be cooled.
   
3. The air con system has to work when it is hot outside.
   
4. An air con condenser fan uses electrical power.

Yes, so what? Everyone knows all that, I would have thought.

not sure
 

I'm sure. Until you're sure, you need to keep thinking about it. Until it clicks.

Well, since no one else has commented, I guess the light bulb hasn't gone on for anyone else either.

In your normal overly complex manner, you're simply stating what is obvious to anyone know knows anything at all about cars:

• The air con condenser causes aero drag.
• The air con condenser needs to be cooled.
• The air con system has to work when it is hot outside.
• An air con condenser fan uses electrical power.

I guess it's only some kind of breakthrough if you'd never considered these aspects before.

The extra drag caused by a condenser is tiny, and I haven't seen anywhere any manufacturer stating an increase in drag by opting for the air conditioning extra. I don't believe it is relevant or beneficial.

There is extra drag caused by the belt, the clutch, the weight of all the components too. And I think they have more of an impact, which is still tiny.

It comes back to the superiority thing I think, aerohead likes to tell us there is something hidden in the data that only aerohead can see. But instead of telling us what he sees, we just get a cryptic keep looking so we can feel inferior to the omniscience.

aerohead, if there is something important that we have all missed, and only you can see, let us know. And preferably, let us know in the first thread post.

light bulb
 

Light bulb ( incandescent anyway) is an okay metaphor.
If any passenger emits 300 Btu / hour, metabolic cooling load, and four no longer equals seven, then we finally have a context with which to compare a 911 Carrera to a Model S, cooling-wise.

something
 

please reread the 3rd paragraph @ #1 permalink, and then #8 permalink

Given that your theories are often quite strange - some would call them bizarre - it helps if you explain what you're actually trying to postulate.

As has been pointed out, you haven't done so - and so telling us to re-read what you've written is not much help.

strange
 

Someone with critical thinking skills might reflect upon what they've said. I'm trying to trigger that activity.
You'll write, 'X is.' And we say, 'bunk!'
Twenty-eight days later you'll write, ' X & Y is.' Finally providing the qualifier we would have expected to see in the original remark, twenty-eight days earlier.
If you'd prefaced your original comment with the information you come up with 28-dayes later, we'd all have been far ahead. But you didn't. You don't appear to know the difference, so it won't mean anything to you, as it does to us.
And so it makes us the bad guy for calling you on it. And none of your compatriots appear to know the difference either. Triply complicating the situation.
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Completing the course in Thermodynamics would solve a lot of your issues. I can't take the course for you. And I can't understand it for you either.
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I can tell you with extremely high confidence, that you'd be in a far better position to write ( and argue ) about cooling systems if you had some background in thermodynamics. That's why it's a mandatory part of the engineering curriculum. If nothing else, just study the 2nd Law.
You're close to the goal line. A little more training camp will get you into the inzone, no problem.

So all that guff is just saying: no, I won't tell you my theory?

Many of your threads are simply a waste of space. This one is a classic example.

Thankfully, it appears that less and less people are now bothering with them - which can only be positive, as consequently there will be far less confusion in aerodynamic understanding.