Understanding the basic working of the HVAC system is fundamental to successful as an HVACR contractor. It is important for potential contractors to be familiar with this system so they can work along with an HVAC professional when needed to complete projects. Without a good grasp of the HVAC system, it is unlikely that a contractor will be able to complete the basic tasks needed to do work on HVAC systems. As a contractor, you should always strive to always be up-to-date on the basic principles of HVAC. This way, you will have more knowledge about your trade and be able to perform better and more efficiently.
One of the most basic principles in HVAC is the heat recovery stage. This process is necessary because heating a medium is very different from simply warming a cold medium. In the heat recovery stage, the heated air in the refrigeration systems is compressed by the cool air outside of the system. The compressor then compresses the warmed air inside of the refrigeration systems. This is the job of the refrigeration cycle.
The compressor then releases cool air that the condenser will draw on to make the hot air become warm again. This process continues until all of the heated water has been extracted from the cooled air through the chillers. The compressor is then shut off, and the refrigeration cycle is complete. A typical HVAC system will typically have several stages in which this occurs, depending upon the size of the system.
One important principle of the refrigeration cycle is the fact that it is necessary to maintain the low temperature of the refrigerant. If the refrigerant is allowed to reach its boiling point, the product will begin to boil and the refrigerant will release harmful substances into the air. These unwanted byproducts are a direct result of the work of the compressor. Because these unwanted chemicals can present a health risk, most cooling systems will be equipped with high efficiency particulate air (HEPA). HEPA is less expensive than other methods of air conditioning because it does not add any unwanted foul smell to the air.
A typical HVAC system will have two compartments: one with the refrigerant and the vapor itself, and another compartment with the refrigerant and the liquid being chilled. The refrigerant will be placed into the first compartment, and the vapor and cold liquid will be placed in the second compartment. The cycle simply repeats itself over, as long as there is an open valve in the first compartment. Click here to learn more about refrigeration cycle.
One important principle of the refrigeration cycle is that the higher the temperatures of the refrigerants, the lower the vapor pressure will be. As the temperatures of the vapor and the liquid increase, the vapor pressure rises. When the temperature is reached, the liquid will turn into ice and will be cooled further. This will cause the compressor to start to slow down, and eventually the cycle will be completed. The compressor will then shut down as the refrigerant is drained from the system, leaving the system cold. Check out this related post to get more enlightened on the topic: https://en.wikipedia.org/wiki/Vapor-compression_refrigeration .