Air conditioning hire - portable air conditioning london

Portable air conditioning hire, by Aircon Hire , the air conditioner hire specialists - serving London and South East England.

air conditioning hire, air conditioning hire london, airconditioner hire, airconditioner hire london, portable air conditioning, portable air conditioning london, portable airconditioner hire, portable airconditioner hire london, aircon hire

How Air Conditioners Work An air conditioner is basically a refrigerator without the insulated box. It uses the evaporation of a refrigerant, like Freon, to provide cooling. The mechanics of the Freon evaporation cycle are the same in a refrigerator as in an air conditioner. air conditioning hire This is how the evaporation cycle in an air conditioner works: The compressor compresses cool Freon gas, causing it to become hot, high-pressure Freon gas. This hot gas runs through a set of coils so it can dissipate its heat, and it condenses into a liquid. The Freon liquid runs through an expansion valve, and in the process it evaporates to become cold, low-pressure Freon gas. This cold gas runs through a set of coils that allow the gas to absorb heat and cool down the air inside the building. air conditioning hire Mixed in with the Freon is a small amount of a lightweight oil. This oil lubricates the compressor. Most air conditioners have their capacity rated in British thermal units (BTU). Generally speaking, a BTU is the amount of heat required to raise the temperature of one pound (0.45 kg) of water 1 degree Fahrenheit (0.56 degrees Celsius). Specifically, 1 BTU equals 1,055 joules. In heating and cooling terms, 1 "ton" equals 12,000 BTU. A typical window air conditioner might be rated at 10,000 BTU. For comparison, a typical 2,000-square-foot (185.8 m2) house might have a 5-ton (60,000-BTU) air conditioning system, implying that you might need perhaps 30 BTU per square foot. (Keep in mind that these are rough estimates. To size an air conditioner for your specific needs, contact us.) The energy efficiency rating (EER) of an air conditioner is its BTU rating over its wattage. For example, if a 10,000-BTU air conditioner consumes 1,200 watts, its EER is 8.3 (10,000 BTU/1,200 watts). Obviously, you would like the EER to be as high as possible, but normally a higher EER is accompanied by a higher price. A window air conditioner unit implements a complete air conditioner in a small space. The units are made small enough to fit into a standard window frame. You close the window down on the unit, plug the unit in and turn it on to get cool air. If you take the cover off of an unplugged window unit, you will find that it contains: A compressor An expansion valve A hot coil (on the outside) A chilled coil (on the inside) Two fans A control unit The fans blow air over the coils to improve their ability to dissipate heat (to the outside air) and cold (to the room being cooled). Cooling Towers In all of the systems described earlier, air is used to dissipate the heat from the outside coil. In large systems, the efficiency can be improved significantly by using a cooling tower. The cooling tower creates a stream of lower-temperature water. This water runs through a heat exchanger and cools the hot coils of the air conditioner unit. It costs more to buy the system initially, but the energy savings can be significant over time (especially in areas with low humidity), so the system pays for itself fairly quickly. Cooling towers come in all shapes and sizes. They all work on the same principle: portable airconditioner hire london A cooling tower blows air through a stream of water so that some of the water evaporates. Generally, the water trickles through a thick sheet of open plastic mesh. Air blows through the mesh at right angles to the water flow. The evaporation cools the stream of water. Because some of the water is lost to evaporation, the cooling tower constantly adds water to the system to make up the difference. Portable air conditioning hire.