Welcome to the wonderful and wacky world of thermodynamics.
A volume of air has heat. For example a gallon of air needs a certain amount of cooling to drop from 87 degrees to 42 degrees.
An AC evaporator can absorb heat at a constant maximum rate. When the blower is on low and lets say flowing one gallon of air a second, the evaporator is able to drop ...
Keep the AC system in the car until you are ready to get it repaired. There's a load of parts to an AC system and some of them are hard to access, you are likely to spend much more in labor costs removing and then re-installing the system than any fuel savings from reduced weight.
They are not even close in comparison.
Your refrigerator is a small sealed unit that averages 488 BTU, the compressor speed is controlled to operate efficiently as possible, and is designed to operate in a controlled environment.
According to electricity expert Michael Bluejay, the average
refrigerator uses 488 BTUs per hour in normal use.
It depends on several factors:
The car's aerodynamics
The AC compressor load
Temperature differential between the desired temp and the outside temperature
The SAE did an experiment, the full results are paywalled, but there's some useful detail in the summary:
On-road and laboratory experiments with a 2009 Ford Explorer and a
2009 Toyota Corolla were ...
I can't give you numbers or calculations without some work, but I can tell you than energy is never free. Cars have an A/C compressor that is mechanically driven by the engine because this is the easiest way to get the job done in a typical consumer car.
An A/C compressor actually takes a huge amount of energy to operate. In fact a central A/C unit for a ...
You're meant to.
In fact, in older cars, it was automatic when redirecting air to the window defroster. On this GM control, the far right position would activate the A/C compressor.
Almost always, it is a cold, wet day, and you have both sliders all the way to the right. The pass across the activated A/C coils dries out the air, because of the way ...
What issues can I run into trying to recharge my A/C refrigerant
The most common DIY problem is overfilling oil, under or overcharging refrigerant and installing the virus that are sealants.
What equipment do I need to do it safely?
Gloves and safety glasses. The PAG oil used is not good for humans and the gas can cause frostbite.
Unless the compressor is on a belt by itself, you don't want to remove the belt. Water pumps, alternators and power steering are nice things to have. An A/C delete/bypass pulley for your application would be a way to go, but it will involve pulling the compressor. Probably the easiest thing to do is locate the appropriate relay and pull it. If it's the ...
Well, Teslas (and presumably other all-electric cars) have A/C so it's not impossible, but A/C takes a fair amount of power.
On the other hand, Teslas store a lot of energy. The A/C is something like 2.4kW which is about 8,000 BTU/h or about 3HP. So using an electric motor on a conventional car might give you a few more HP briefly, but the alternator has ...
If you would like to do that by the use of solar panels, the problem is power.
A typical car AC probably uses somewhere between 1000 and 3000 watts. A square meter of typical photovoltaic cells generates roughly 150W of power. Even if you covered the entire car with solar panels, they wouldn't be sufficient to power the AC completely under perfect ...
In a word No, not even close. Some are all mechanical, some vacuum, some completely electronic. some are combined with the infotainment device (radio) even the ones of the same type from the same manufacture might not cross. So you can't always take on out of on make Pontiac and put it in another make Pontiac of the same year.
Keeping a constant speed using cruise control with windows shut and ac on because once the cabin is down to temperature it requires little to keep it there and the ac will modulate its power needs.
Driving with windows open will increase the drag and that will only reduce if you either reduce speed or close the windows.
When I got my Refrigerant Handling Certification from MACS many years ago, we were sworn to use a proper recycling machine, which captured everything and filtered out air, oils, and moisture. The refrigerant could then be re-used for the same or different vehicle. This was the transitional time, and there was much concern of a cheap "retrofit" DIY job ...
Yes, it is useful, okay and won't cause any damage.
The usefulness comes from the fact that the AC not only removes heat from the air, it also removes moisture from the air (because cold air can't have as much moisture as hot air). The removed moisture clears your windows quickly.
The only "damage" caused is the additional fuel consumption. On most new ...
This is normal behavior. The A/C system is turned on to dehumidify the air, which causes the windshield to defog. Without it, your breath would freeze on the inside of the windshield and cause further issues.
Please note Bob Cross' comments below.
I found instructions on the Honda Tech Forum which is supposed to give you full manual control over ...
It has to do with the type of compressor which is used. The system in a refrigerator/freezer has a completely closed unit, where the compressor is housed inside of the gas. Because of this, all the lines associated with it can be soldered shut with hard lines, etc. Because of this, a house refer/freezer will not cool as quickly, either. They work very well, ...
I understand your concern, but you will not find a car coming from the manufacturer which has insulation around the piping. If you think about it, though, it makes sense and here are three reasons why you shouldn't worry about it:
The cold side of the piping is after the evaporator, headed back to the compressor. Any loss here will not make a difference in ...
Cabin filters on modern cars use something called activated carbon (or at least some of them do) which is basically two paper / cotton sheets either side of a fine layer of carbon particles.
It looks to me as though your cabin filter has a hole in it and therefore is blowing carbon all over the inside of the cabin.
I'd take it back to wherever installed ...
First, a word of warning. To do it right (and not waste expensive refrigerant, or risk ruining your A/C compressor), you'll have to get a few pieces of equipment. If you're just going to do this once, you could ask your local shop for a quote: the price might come out similar both ways.
I'm going to explain how to do A/C by weight, as that is how ...
Typically it's just a pollen filter that's more for occupants comfort. In older cars you would very occasionally get a dead bumble bee through a vent but I'd say that six days unfiltered shouldn't cause much of a problem for you.
The short answer to your question is no. As @JPhi1618 noted, the compressor is mechanically driven. Without the compressor you don't have any cooling. The AC runs by changing the state and pressure of a liquid, and compressing the liquid is a big part of that cycle. If you bolted an electric compressor onto the car you would have to find a way to switch ...
No way. In fact the system is actually designed that way.
The Air Conditioning (A/C) system on your car runs automatically when you are in the Defrost mode. Like you say that setup removes water vapor from the air preventing fogging inside the windshield. That’s considered a safety feature.
The system has internal shut off protections to starting the A/C ...
There are several things that can keep the compressor from engaging
the heater-A/C mode control switch
the low pressure cycling clutch switch
high pressure cut-off switch
compressor clutch relay
Powertrain Control Module (PCM).
One of the most common problems is a low refrigerant charge, the low pressure switch prevents the AC clutch from engaging when the ...
A non functioning radiator fan could have those symptoms. In your car the fan is most likely shared by both the radiator and AC. When driving there is sufficient air flowing across the condenser and radiator. When you slow down the fan should take over to keep the air flowing. If it's non functioning it could cause the AC to blow warm and may overheat.
Cabin air filters will usually filter the air on either setting if located on the cabin side of the firewall. But even in recirculation mode, outside air will make its way in. Just be sure to replace it as frequently as your manual suggests. However, filters located under the hood at the air intake will not filter recirculated air.
Edit: I decided to ...
Yes, this is possible. Several companies (VAG, BMW) have switched to AC units that are driven by electric motors. For BMW, this is part of their Efficient Dynamics strategy, where they'll switch the compressor on/off depending on engine load to optimize fuel consumption.
When the weather's not too hot, you can run the compressor intermittently without the ...
Set these test conditions:
Engine set to 1800 rpm
Recirulation air direction on
Fan speed on low
Temp set to max cold
Air outlet to dash vents
Vehicle in the shade
Run for at least ten minutes, longer on a hot day.
It can take much longer on in hot weather or if the vehicle is parked in the sun.
Measure at least 3 inches into the center dash ...
You have a great idea! And it IS being done.
Certain models of the Toyota Prius feature an optional solar roof that powers interior fans that automatically engage when the interior gets too warm.
The hybrid batteries are not even used at all: the fans run strictly on solar power! Cool (literally).
Image Source: resilience.org
It probably has a Climate Control unit which regulates the temperature automatically. This means that the air conditioner should always try to reach the requested temperature.
So when it's outside 30 degrees celcius and you request 20 degrees, then your car enables the A/C to reach that temperature.
The A/C will stop running, when the temperature is reached,...
Fuel efficiency shouldn't be your only consideration. Rolled down windows will expose you to noise levels well above 85 decibels which can cause permanent hearing damage with prolonged exposure.
British scientists tested everything from a Mazda to an Aston Martin in non-rush hour traffic going 50, 60 and 70 MPH.
They found that regardless of speed or model, ...