why do we need to compress refrigerant

This added work of compression done by the compressor will cause the heat of compression to be higher. When you compress a file, it reduces the space used by the file by more than 50%; Like we saw earlier, compression is like deflating a tube. Figure 1 depicts a typical, single-stage vapor-compression system. The air conditioner component of a building’s HVAC system essentially is a type of refrigerator that cools and dehumidifies the air in the building, ensuring thermal comfort for the occupants. When the condensing pressure is high, the compressor must compress the refrigerant from the low-side (evaporating) pressure to an elevated high-side (condensing) pressure. Isn’t that cool? Let’s look to the pressure/temperature relationship of refrigerant for the answer. At first ,we have to correct this question.All refrigerator system dont need compressor.It is needed only in vapor compression cycle,not in vapor absorption cycle. For Refrigerant R-22 the saturation temperature at 20 F occurs at 43 PSIG. A refrigerant is a substance or mixture, usually a fluid, used in a heat pump and refrigeration cycle.In most cycles it undergoes phase transitions from a liquid to a gas and back again. Vapor-compression uses a circulating liquid refrigerant as the medium which absorbs and removes heat from the space to be cooled and subsequently rejects that heat elsewhere. Refrigerant reclamation is the second phase of refrigerant recovery. Ever since 1993 R-134a has been the staple refrigerant for automotive applications. All types of refrigerant should be recovered either when opening a unit to work on it or during the disposal of a unit. Suppose you have a refrigerant tank attached to an evaporator.The refrigerant is at a higher pressure in the tank.You open the tank and boom! 6 Once reclaimed, the refrigerant can be recycled, which means oils and debris are removed from the refrigerant so that it can be reused. Fluorocarbons, especially chlorofluorocarbons, became commonplace in the 20th century, but they are being phased out because of their ozone depletion … This refrigerant is not 100% compatible with the lubricants and mineral-based refrigerant currently used in R-12. This is why we use a “pump down” type system. Thus, the compressor’s discharge temperature will to be higher. A file of 10GB could e compressed to 5GB or less. Reclamation is the evacuation of refrigerants from HVAC/R equipment. Liquid refrigerant is uncompressible in refrigeration compressors; the materials that the valves and pistons are made of were not designed to stand up to the kind of force needed to compress a liquid. Liquid refrigerant that enters the crankcase can get pulled into the cylinder heads along with the vapor. When you compress a file, it actually uses computer algorithms to reduce the size of the file to almost 50% or more. Our system must condense at a high enough temperature that the heat will flow from the refrigerant to the outside air as it passes through the condenser coil. Design changes to the condenser and evaporator need to be done to use this refrigerant. Before 93 we used R-12 for our vehicles and now, as I write this article in 2018, there is […] If we lower the pressure in the crankcase to a point where the saturation temperature of the refrigerant is below the ambient temperature the compressor is in, the refrigerant cannot condense. Many working fluids have been used for such purposes. The use of smaller hoses and 30% increase in control pressure regulations also have to be done to the system. The high pressure forces the refrigerant through a line that leads to the outdoor coil, where the refrigerant releases its heat and condenses into a liquid. The compressor compress the gaseous refrigerant, and this raises the refrigerant’s temperature so that changes it into a high pressure gas. Now again think of a scenario. Refrigerants are recovered to prevent them from leaking or being dispersed into the atmosphere. Now that we have transferred the heat to the refrigerant, we need to transfer this heat to the outdoor coil. The compressor is the heart of the cooling function of heating, ventilation and air conditioning (HVAC) systems. Why do we Recover Refrigerants? R-134a is the most commonly used refrigerant for automotive applications rather it be your twenty year old Toyota Camry or your Kenworth T-200 semi-truck. Added work of compression done by the compressor compress the gaseous refrigerant, we need be! Type system compression to be higher pressure in the tank.You open the tank and boom outdoor coil refrigerants are to. Depicts a typical, single-stage vapor-compression system to transfer this heat to the system recovered either when opening a.. Pump down ” type system article in 2018, there is [ … pressure regulations also to... 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