Home 

Ref-Wiki.com -

Technical information Air-Conditioning Air-to-Air Heat Pumps

Air Heat Pumps

Heat pump heat moving mechanism is used in residential and commercial applications. The heat absorbed by the evaporator in one place. He released via a capacitor elsewhere. The system can draw its work. Evaporator becomes capacitor and capacitor becomes the evaporator. Heat flow is reversed. Thus, by reversing valve, or the mechanism cools or heats the air in air-conditioned comfort. Flow through the compressor is always in the same direction.

Heat pumps use compression refrigerating machinery. They are like food refrigeration or air conditioning mechanism. Ideat pumps h Yves two heat transfer surfaces. One is inside the air-conditioned comfort and the other doors.

The heating cycle, outdoor coil becomes the evaporator. The internal heat exchanger becomes the condenser. In operation, the liquid refrigerant enters the outdoor coil. He takes the heat out of the air and of evaporation. Low pressure refrigerant dravn in the compressor. It is compressed to high pressure and temperature, and is then pumped into the indoor coil.

Since its temperature is above room temperature, the heat in the room.

High-pressure refrigerant will condense on giving up its heat by evaporation. She returns to a liquid state. The liquid then flows back into the evaporator. The cycle repeats. Because outdoor coil cooler than on the street, the surrounding air, ice can form on it. Ice is formed because, as absorb heat, moisture condenses on the coil and freezes. Ice may form at temperatures above freezing, because the refrigerant inside the coil piping significantly lower than 323F (0C), Therefore, outdoor coils are equipped with anti-icing management. These elements work in one of two ways, when ice forms:

  • They automatically turn on the heaters.
  • They turn off the compressor allows evaporator surface to warm up and melt the ice.

, cycle cooling coil in the conditioned space becomes evaporator. Refrigerant enters the evaporator. The liquid refrigerant boils, absorbing heat. Steam from the boiling refrigerant enters the compressor. There, it is compressed. High-pressure refrigerant is pumped into the outdoor coil, which became the condenser.

The air surrounding outdoor coil cooler than compressed to high pressure of the refrigerant in the coil. Therefore, compressed refrigerant vapor gives its heat to the outside air. It condenses and flows in the lower end of the condenser, as the liquid refrigerant. Hence, it flows into the bottom of the evaporator. From this point of the cycle is repeated. A motor-driven fan on both coils means of a heat flux from the surface of the coil.

Air heat pumps are also used as part of ductless split air-conditioning system. This system uses one external condensing unit. Outdoor heat pump is installed on the platform. Tube and Postings exactly in the position where the blocks will be placed. This mechanism allows up to three internal units, using only one condensing unit.

The location of the internal units may vary, depending on your needs. Each indoor unit has its own independent control. Some systems use the remote control, similar to those used with TVs. Remote ductless different systems used in the new and modernized, offices, houses, motels. This is often done when a regular window or wall units are not desirable or applicable.

The main advantage is that it serves multiple independent rooms with only one condensing unit. Heat pump installations are ideal where winter heat load is almost the same as and summer cooling loads. Air-to-air installations are the most satisfactory when the outside temperature in winter remains above (or only rarely drops below) freezing point...

 
Thanks ->



Effect of superheating on cop Effects of freezing on microorganisms Efficiency of compressor Flash intercooler Flooded evaporator Heat of respiration Hermetic compressor Nomenclature of refrigerants Pressure switch Psc compressor Refrigeration oil pressure switch wiring diagram Shell and tube condenser Steady flow examples
Copyright @ 2009 - 2020, "www.ref-wiki.com"