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How efficient is refrigeration as cooling for a home as compared to central air conditioning? I plan to move to the Phoenix, Arizona area and am currently looking at homes. All of the homes that I am seeing have refrigeration cooling. I have always lived in the South and Midwest, and I have always had a window unit air conditioner or central air. How efficient is this refrigeration cooling as compared to central air conditioning? Is it electric or gas? Is it the recommended cooling system for this area? What about repairs and maintenance? Don replied: "Refrigeration IS the same thing as air conditioning. Central units are merely whole-house devices that force the air through ductwork, instead of having a little window unit in each room. I suspect the efficiency is similar, but you'll probably be more comfortable with the whole house cooled. Central air conditioning can be gas or electric. I'm not sure that one is more efficient than the other, you'll have to get cost information from someone that knows local prices." What is the reason for a slow or stopped central air conditioning outside cooling fan with a loss of cold air? The recent problem seems to be related to the outdoor cooling fan. The air conditioning system seems to be working properly, but there is a loss of cooling of the air coming from the indoor air conditioning vents. I inspected the outside unit, and yesterday the cooling fan was stopped with a humming/grinding sound. The capacitor looked good (no bulging), but I'm not an electrician and I have no way (or the knowledge) to test voltages and amperages and such. Anyway, I blew on some dust/dirt/cobwebs around some of the wires, and started the system back on and the fan moved at normal speed and the system worked and cooler air came out.
However, today, the indoor temperature wasn't maintained and I went outside and the cooling fan was running much slower (but it was running). After I turned off the system, I felt the metal cover of the outside unit, and it was very hot, and it seemed that the source of the heat came from directly above the cooling fan motor.
Please contact me! bigg_dogg44 replied: "tends to be a voltage drop to the motor..most times its the motor about to go.....you should have the system checked right away.......sounds like ur going to need a new compressor....
lic. gen contractor"
old-bald-one replied: "Your outside fan needs replaced !! Turn off your a/c until you get it replaced or you will ruin your a/c unit. Without enough air flow your a/c unit can't exchange any heat. The compressor will just get hotter and hotter."
angelo replied: "replace your outdoor fan and while your at it replace the capacitor and everything will be fine. But turn your unit off untill you get it fixed or you'll be changing a compressor or buying a new unit."
Coolness replied: "Just replace the capacitor. They are cheap. If that doesn't work and you are sure that the proper voltage is available, replace the entire motor."
Katmando replied: "If the outside fan turns slowly, then a capacitor may do the tick. Otherwise, change the fan motor. Without the condensor fan motor, you compressor will overheat and probably trip the high pressure switch if it has one. If it does not, then you may wind up with and acidic condition in your system."
HVACMan replied: "If this problem has been occurring long enough the fan motor probably has toasted windings and is close to burn out from either water getting into the motor or a bad capacitor. Always replace the capacitor whenever you replace the fan motor. They are cheap and not the worth the cost of burning up the new motor. Besides, a new motor will likely have a different (MicroFarad) MFD rating on it. It is also possible this problem could lead to problems with the compressor. When the motor fails to run the head pressures in the unit go way up which can cause issues with the compressor. Shut the system off and call a tech is the best advice." What causes my cooling fab to come on only when the engine is turned off? Im the proud owner of a 92 honda prelude, and my cooling fan does not come on while the engine is running; but when i turn the car off with the high temperature, the fan comes on. Can some one help me please? Im having very high temperatures!!! mekhanic7 replied: "YOUR TEMPERTURE SENSOR IS BAD, NEED TO HAVE IT REPLACED AT A EARLY CONVIENENCE"
goldwing127959 replied: "On some cars the coolent fan turns on and can be on after you turn off the engine. In your case the tempter sensor is bad and need replacing.
Also check to be sure the thermostat is working." How do most cooling systems work on laptops? Do the fans suck hot air from the bottom and blow it out the side or do they just blow the hot air down?
Specifically a dell inspiron 1150 but any will do.
Im planning on building a custom cooling pad...
Thanks WOLFER90 replied: "im pretty sure you'll figure this out when you get the laptop"
Marvin replied: "A more usual design is to draw air from the top or the back.
Drawing from the bottom is a problem if the laptop is being used on soft furnishings because the intake would get blocked by the fabric/cushion/bedding" What is the most bang for the buck liquid cooling system? I need one that is specifically good at cooling a gpu (ati 2600 xt) and is also a cpu cooler, but i do not want to pay an arm and a leg for it. It should also work, in a mini atx motherboard, which is what i believe i have. If there is no such thing, then what is the best gpu cooling system that would work on an ati 2600 xt. TC 422 replied: "This is your best option-
It fits into two 5.25" drive bays, and it is self contained. This will be able to cool all your components, just make sure that your card has a liquid cooling block on it. The system comes with a CPU block." How do I unclog my cooling system? There is what i believe a plastic object in the cooling system. (long story) I need to know how to get it out without damaging anything. BUBBA~THE~POOCH replied: "If it is not in the fan and it has not caused a refrigeration leak, than you can leave it."
champ2785 replied: "Take the bottom hose off and try backflushing." What is the cooling capacity of liquid nitrogen? For the purposes of cooling a room (ie compared to air conditioning), by a simple method such as blowing a fan through a metal grill filled with LN2, how much cooling power is there per L of liquid nitrogen?
Say you wanted 5000 BTU of cooling power - how many L of LN2 would you theoretically need? kirchwey replied: "Here are the data you need:
Liquid density (1.013 bar at boiling point) 808.607 kg/m^3
Latent heat of vaporization (1.013 bar at boiling point) 198.38 kJ/kg
1 kJ = 0.95 BTU
I L = 0.001 m^3
This info will give you the heat absorbed in the transition from liquid phase to gas phase. Then for heating the gas phase to the desired room temperature you need the specific heat, which is about 1.04 kJ/(kg-degC), and the boiling point at atmospheric pressure which is -196 C.
BTU/L = BTU/kJ * Liquid density in kg/m^3 * m^3/L * [Latent heat of vaporization + ((Room temp - boiling point) * specific heat)]
Gopherit!" Do cooling collars for dogs actually work? I was thinking about buying my dogs cooling collars for the summer. Has anyone ever used one? If so, how long/well do they work? The directions are simple...Just soak once in the morning for cooling your pet all day. Jan replied: "I love the idea of keeping my dog cool all day in the heat. I think they do work but the all day part is not true. You gotta keep getting it wet every couple of hours."
Chiappone replied: "I know a few bulldog owners that use them, or the cooling vests. They all say they work well, but it's not all day, a few hours maybe, but then again you shouldn't really leave a dog out in heat all day anyway..." What is likely to happen if cooling water is not run through the condenser when the mixture is refluxed? In this experiment, we will reflux a mixture of nutmeg and dichloromethane (bp 40 degree). What is likely to happen if cooling water is not run through the condenser when the mixture is refluxed? Lars replied: "The dichloromethane will eventually boil off to dryness and then the nutmeg will burn if the heat is high enough." How would you increase building interior energy efficiency using the same heating and cooling systems? In other words, how would you lower heating and cooling output of your existing AC/Heating?
Doors, windows, and vents are already weatherized, and lighting, electrical Appliances, and plumbing fixtures are at maximum efficiency, and standard r-value insulation is installed around the building exterior walls..
The only issue is how much heat and cool air in the building is escaping through the building walls,floors, and roof. oil field trash replied: "In most homes, air infiltration is a common problem both in the winter and summer. In addition to the common places such as outside doors and windows, other culprits are chimneys and opening to attic spaces. Pull down stairs for attic spaces is a really big one. All you have to do is take a plastic trash bag and place it horizontally under a pull down stairs and see the result. Conventional doors that lead to stairs and attic spaces are typically no weather stripped and that is also a problem. Chimneys, even those with the dampers closed, are an avenue for a very large amount of heat to escape in the winter.
Large overhangs on exterior walls to keep direct sunlight from the side of buildings is also overlooked in most cases. If you look at many very old houses in the southern US, they have large overhangs or porches on the east and west sides to minimize direct sunlight hitting the walls.
Where buildings have an outside makeup air stream, heat exchangers can be installed to recover some of the interior heat (or cool) from the outside going air." |
| interesting sites |
Cooling - Wikipedia, the free encyclopedia Computer cooling - Wikipedia, the free encyclopedia Passive Solar Heating and Cooling Process Cooling Engine cooling: Definition from Answers.com Cooling tower: Definition from Answers.com Heat & Cool Efficiently : ENERGY STAR APC Product Information for Cooling Chapter 6: Cooling Central Air Conditioners | ConsumerReports.org |
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