Home 

Ref-Wiki.com -

R-134a

R-134a is the refrigerant HFC, which has a boiling point of 26.2 C (-29.8 C to R-12) and latent heat 205 kJ/kg (159 kJ/kg for R-12) (Pearson, 1991). It is non-flammable and non-toxic replacement for R-12. R-134a is widely used in domestic refrigerators and in the automotive Air conditioning but, apparently of little use in its normal cooling or air-conditioning, where a moderate temperature of condensation may be specified. R-134a is proposed as a potential replacement of R-22 in area of complex systems. However, the volumetric displacement compressor for R-134a should be about 50% more than the volume of R-22 compressor same cooling capacity.

Pressure drops refrigerant tubing can have a significant impact on CA R-134a system, so more of the tube may be needed than R-22 systems. R-134a packaged systems tend to be physically larger and more expensive than their R-22 colleagues (Hickman, 1994). Currently, R-134a is not considered for widespread use in reciprocating chillers; however, it is offered by some manufacturers as an alternative to R-22 screw and centrifugal chillers with flooded испарители.

R-134a is also acceptable as a substitute for R-400 ((60/40), mass%) and R-114 in new industrial process air conditioning.

EPA recommends R-134a only be used at ambient temperatures lower than 70 C because of the very high pressure in the system. R-134a is not contribute to ozone depletion. R-134a is the GWP and atmospheric lifetime is close to what other alternatives that are acceptable in this end-use. While R-134a is compatible with most existing refrigeration and air-conditioning equipment, parts, it is not compatible with mineral oils, which are currently used in these...

 
Thanks ->



Air draft Basic furnace wiring diagram Capplary Chemical dehumidification Crystallization in vapour absorption system Hcfc 22 Hot gas bypass Liquid suction heat exchanger Modified splash lubrication system Overload protector Refrigerant distributors Refrigerant pipe material Refrigerator compressor oil change
Copyright @ 2009 - 2020, "www.ref-wiki.com"