Drop-in del R-404A
R-442A is a non-azeotropic HFC refrigerant gas mixture, with zero ozone depletion, low global warming potential and high energy efficiency, used in new medium and low temperature refrigeration equipment. It is also a direct substitute (drop-in) for R-404A and R-507 and an indirect substitute (retrofit) for R-502 and its HCFC substitutes such as R-22, R-408A, DI-44, HP80.
R-442A (RS-50) is the evolution of the high security refrigerants (A1) of the HFC group, with low greenhouse effect and great energy savings for refrigeration. Studies carried out by the Polytechnic University of Catalonia have shown that R-442A is the refrigerant that provides more cooling capacity and coefficient of performance compared to R-404A, R-507, R-407A, R-407F and R-22 both in medium and low evaporation temperatures. A large decrease in the time required to reach the desired temperature could also be observed. The special additives in R-442A greatly improve the return of POE oil to the compressor. Changes from R-502, R-408A, DI44, or R-22 to R-442A will be very similar to those made with R-404A. To change an installation from R-404A or R-507 to R-442A it will practically only be necessary to slightly close the expansion valve. In the case of being used as a retrofit of R-22, it will also be necessary to change the safety valves and other elements that were calibrated to the pressures of R-22.
With this refrigerant we manage to greatly reduce TEWI, which is the sum of the direct CO2 emissions caused in the event of a refrigerant leak plus the indirect emissions produced by the electrical consumption of the equipment with that refrigerant. Many installation companies previously recommended R-404A or R-507 for installations with high temperatures despite being less efficient products than R-134a, since using R-134a requires a larger compressor thus increasing the budget. With R-442A you don't need a bigger compressor but you do gain a lot of energy efficiency.
· Compatible with synthetic POE oils.
· Equipment can be refilled in case of leakage.
· Discharge temperatures lower than R-22.
· Refrigeration capacity and energy efficiency superior to R-502, R-22, R-404A, R-507, R-407A and R-407F.
· Pressures similar to R-404A.
Global Warming Potential (GWP): 1888
Boiling point at 1,013 bar (ºC): -46.5
· Temperature slip or glide (ºC): 4.6
· Saturated vapor density at 25ºC (kg / m3): 47.7
· UN number: 1078
· Safety classification: A1. Low toxicity and non-flammable.
· Always charge in liquid phase.
Aquí puedes encontrar estudios detallados de ejemplos reales de la aplicación de este producto.