how does an air conditioner works in aeroplane?
441428
In modern jets the air is taken from after several stages of compression at this point the air is relatively hot and can be allowed to cool through a small radiator before being depressurized.  The resulting depressurized air will be significantly cooler because it had lost energy when there was a heat differential between atmosphere and its pressurized state. This is why the air conditioning in an airplane needs assistance from a ground until the engines are operating.
1033924
Any type of air conditioning unit must have a way to expel the hot air it generates outside of your home.  \n\nWith a window air conditioning unit, the unit sits partially inside and partially outside.  The hot air is expelled directly to the outside.\n\nWith a Split Air Conditioning one unit sits completely inside, and another sits outside.  The hot air is channeled through a pipe to the outside unit.  This means that the unit can be placed anywhere, not just in a window.  Also, since the compressor is outside of the home, the unit is quieter than a traditional window air conditioner.
80699
They're called contrails, short for condensation trails. When a jet engine is running it heats up the air traveling through it.  On the ground it's not that noticeable.  Up in the atmosphere where jets fly, the temperature is way below freezing. The warm moist air condenses as it exits the jet engines and you can see the water vapor the same way you can see your breath on a cold day.
141770
To answer this question there are two principles of physics involved and to really understand it is a little difficult.\nThe shape of the wing determine the lift on the wing. The birds know it very well they know how to fly.\nBy making the top of the wing a curves and the bottom a straight line,we obtain two different traveling distances for the air fluid to flow.The angle which the fluid flows is called the angle of attack and in order to fly the airpla must have the proper andgle of attack least it stalls.\n\nBernoulli's principle says that if the velocity of the moving fluid is increased the pressure is decreased.\n\nThe velocity of air over the top of the wing is greater than the air flowing under the wing.Because the air travels a longer distance for the same time as the air floweing below the wing.Hence the pressure is less on top of the wing.\n\nBy Newton third law the bottom of the wing gets the greater lifting power.\nTherefore the statement in the first line of you question is correct.\nSo the plane mimics the flight of a bird.
556604
In very simple terms, think of a windmill / wind turbine as the oposite of a fan... instead of the fan blades turning and blowing air, the air is blown on the blades which makes them turn instead.\n\nThe aerodynamics involved in this process is quite complicated, but it is the same principle as an aeroplane wing... \n\n1. The wind passes over both surfaces of the blade \n2. It passes more rapidly over the longer (upper) side of the airfoil, creating a lower- pressure area above the airfoil. \n3. The pressure differential between top and bottom surfaces results in a force, called aerodynamic lift and turns the blade.
14321
First, look at any typical airfoil shape. It is sort of teardrop shaped, with a round end and a pointy end, but not symmetrical--one side seems flatter than the other. Let's imagine that the pointy end points to the right, the round end point to the left, the flatter side is on the bottom and the rounder side is on top.\n\nLet air flow from the left to the right. Air flowing near the airfoil at speeds that are not too fast (less than the speed of sound) is not compressible. Let's follow two tiny blobs of air that start next to each other, but approach the round end of the airfoil in such a way that one blob goes up and over the airfoil, while the other slides over the bottom. These two blobs will arrive at the pointy end at approximately the same time. But, the one going up and over as a longer path to take and therefore must travel faster. All the air molecules in a blob are actually thrashing about randomly and can collide with other air blobs nearby as well as the upper surface of the airfoil. This is true of the upper blob and the lower blob. But, if the upper blobs average speed is faster, then its molecules collide with the upper surface of the airfoil less over the trip from round end to point end than do the molecules in the lower blob. Therefore the pressure caused by the collisions of the molecules in the upper air blob on the upper side of the airfoil is less than the pressure on the lower surface caused by collisions of the lower blob's molecules with the lower surface. This means there is a difference of pressure between the two surfaces--pressure drops as you go from upper to lower surface. If the airfoil is rigid, then this difference in pressure will become a force exerted on the airfoil from below, called lift. This lift is what makes an airplane rise on takeoff as it rushes through the air with its wings whose cross-sections are airfoil shaped, rounded end into the oncoming air and flatter side towards the ground.
312297
For this you should know that sound requires a medium to travel and is facilitated by wavwfront formation. These wavefronts (or disturbances) are in form of varying pressure inside the medium (in our case air). The disturbances (or waves) in form of high and low pressure zone travels at what is called the speed of sound in the air originating from source (the Jet engine in this case).\n\nNow when some jetplane approaches the speed of sound it is acually trying to travel with the high and low pressure zones created by himself. Along the length of the aircaraft itself there is a lot variation in air pressure. This disturbs whole of the aerodynamics of the plane and it becomes very difficult to overcome the resulting drag.\n\nThis is what is called a sound barrier
331090
Cooling, Heating, and Dehumidifying\n\n3in1Fig1.jpg (23385 bytes)\n\n    As you turn on the unit,  the refrigerant in the system (in liquid form and with low temperature and low pressure), pressurized by the compressor, turns into gas. The gas then enters into the condenser and perform a process called heat exchange. In this process, refrigerant turns back into liquid by releasing heat energy to the air (Airflow 2) and becomes cooler than before. The liquid refrigerant with cooler temperature enters into the evaporator and perform another heat exchange with the air (Airflow 1). In this process, the heat energy in the air is absorbed by the refrigerant in the evaporator and the resulting cooler air is exhaust through the front vent. Note: Airflow 1 and Airflow 2 are independent of each other.\n\n     \n\n    Because the evaporator is lower in temperature than the air, water vapor will condense if the evaporator's temperature is lower than the ambient dew point. This cycle of condensation will lower the Relative Humidity of the room and thereby achieve the goal of dehumidification.\n\n    3in1Fig3.jpg (16322 bytes)  3in1Fig4.jpg (19482 bytes)\n\n    However, if the unit is used as a dehumidifier, remember to remove the air exhaust duct from the back in order to effectively dehumidify the room. If not, constant air flow from the outside (in order to compensate the air flow to the outside through the air exhaust duct) will make the dehumidifying process ineffective.\n\n     \n\n    Heating function (optional in most models) is included with the intention to make this unit an all-season air-conditioning unit. Operationally, this function is just the same as other features. You can operate the fan, louver, and timer, just as you can for cooling.\n\n________________________________________________________________
1066940
http://en.wikipedia.org/wiki/Air_conditioner#Air_Conditioning_System_Equipment\nAs for the water in the air, you have to remember, that this water is taken out of all the air that is passing through the air conditioner for all the hours it is running.  That's a LOT of air.  Air can hold more water than you think.
532973
No. In both, you have a blower, much of the power (volts x amps x power factor) for that is pushing air around, some of that power is lost in heat.\n\nIn a heater (furnace) most of the power goes to heating elements. The remainder goes to the blower motor.\n\nIn an air conditioner, you have the same blower that you have in the heater, you also have the compressor (using power). Like the blower, much of the compressor power is doing work (squashing a gas back to a fluid [once it move through the condenser]). The remainder is lost in heat. The condenser unit (outside of your house) has boat loads of heat radiating from it. This is partially the heat being removed from your house (the main function of the air conditioner).
51813
Your question is too wide to be answered easily in one sitting.  So I'll look at how and why of aerodynamics (simply) and then answer the speed bit.\n\nThis a bit of material I wrote for flight cabin staff to help them understand these principles.\n\nLift is the aerodynamic force that counteracts gravity and holds an airplane in the air. Most of the lift required by an airplane is created by its wings, but a certain portion is also generated by other parts of the aircraft, such as the fuselage. But what actually causes the lift to be created?\nAir is a fluid, just like water. Lift can only be generated when a fluid is in motion. For example, a wing must be passing through the air or the air must be moving around a stationary wing, one or the other. (The way it usually happens is that the wing is doing most of the moving, although the air may be moving, at the same time.)  The wing is moved through the air by the thrust generated by the aircraft’s engines.\n\nMost aircraft wings have a special, basic shape as viewed edge-on: The upper surfaces are curved and their lower surfaces are flatter. This shape is what works with the fluid motion of the air to create lift. As air moves around a wing, some goes over the top and some goes underneath. The air that goes over the curved upper surface undergoes two important changes: it is reduced in pressure and it is accelerated downward (as it leaves the trailing edge of the wing). The wing is forced up into the region of reduced air pressure above the upper surface of the wing by the higher air pressure beneath the wing. Also, the downward acceleration of the air (downwash) at the trailing edge forces the wing upward.\n\nSo this is the basis of aerodynamics.  Roraty wing aircraft (helicopters) work on the same basis, the aerofoil is rotated and lift created by the rotors (moving aerofoils). The thrust to move the aircraft forward is produced by tilting the rotor head, in the direction required.  Hence it can move forwards, sideways and backwards.  But the explanation would take a separate large answer.\n\nAs for speed, the maximum forward speed of the aircraft is determined by the thrust available, but the aircraft is limited by the design of the wing, the wing shape for a low speed high lift glider is very different to that of a supersonic aircraft.  The lowest speed is really controlled by the wing.  As the aircraft sppeed reduces so does the speed of the flow over the wing, surface friction slows it down further until the air refuses to flow over the aerofoil and it breaks up into turbulence and all lift is lost.  A number of things can be done to get this point at which the lift is lost (stall) at the lowest speed possible - such as flaps, slats etc (but this is another long answer).  On helicopters there is no slowest speed as the aircraft will just hover when it stops moving forward, but its maximum forward sppeed is limited by the air over the blades going sonic and loosing lift, and problems with the trailing blade (the one that is heading towards the back of the helicopter in forward flight.) Again another long answer.\n\nHope that helps.  The book below is the RAF's bible on aerodynamics.
659958
sure- it's easy- the refrigeration system moves heat out of one area into another- and simple experiment for you to do, is take a can of pressurized spray whatever, and spray it- can gets cold from reduction in pressure, allowing molecules space to "slow down" because they quit "bumping" from being in a tight spot- making room for more heat- or "making" cold- with me so far? now just picture a system with a pump that packs the gas molecules tightly together, and on the other end has a spot for them to expand (making room for more heat)and then runs the "heated" expanded gas through a radiator (heat comes out) and then gets compressed (packed) again- round and round "absorbs heat- moves heat- loses heat" \n hope this helps- if you really need more help email me through answers and I can provide pictures of how it works.
581857
The cooling system,works like a cars ,except there is no radiator. The water is pulled from the lake or ocean into the water pump,flows through all the water ports in the block and head,then go out . it is kind of a cycle ,in and out.
1005590
hi buddy!\nscience has not developed so much that planes could fly at a speed equal to light!!!!\nhowever, if a plane is so developed, you will be able to see the light if you switch it on inside the aircraft, the same theory is applied for super sonic aircrafts. if there are two pilots inside the aircraft, they can hear their talk as both are flying at the speed greater than sound. here, relative speed comes into play. airsraft and both pilots acts as a single body. so, relatively, they are all still to each other. so, they can easily talk to eachother.\n\nif you turn on the switsh which would light a bulb outside the aircraft, then you will not be able to see it. same happens in super sonic planes. if a sound is made outside the aircraft, the pilots will never be able to hear it.!!!\n\nhope that i have answered ur querry!\nif further clarification is needed, u can mail me at mangeshome1982@yahoo.co.in
138273
The airplane prop works just like the prop in a outboard motor in a boat. The prop has blades which have a pitch on them (angle) which in trun "paddles" through the air - the air is pulled over the blades and in turn pulls the motor through the air. (which of course, is attached to the wing which creates the lift required to get the plane off the ground)\n\nThe boat prop is a great example to use because you can see the water and how it flows over the blades.
841200
Actually, the air doesn't condense; rather, the water in the air condenses due to the change in pressure. It's the same basic effect as when you change temperature: like when you exhale on a could day and your breathe turns to fog: the decrease in temperature of the air in your breath causes the release and condensation of the moisture in it as a fog. \n\nThe same principle applies to a change in pressure such ias that caused by an airplane's wing. For instance, in an air compressor tank, moisture released by the compression accumulates at the bottom of the tank and has to be periodically drained...
497419
The location of AC supply vents is strictly a matter of what is simpliest, easiest and cheapiest for the HVAC contractor. \n\nNo matter where you put them, the air from the AC is cooler that any other air in the room and will tend to go to the floor. So no matter when you have the vent the cooler air ends up in the same place.\n\nThe same story for air in the heating season. Except in reverse because warmer air rises.