In recent years a new refrigerant, R422D, has been introduced as substitute of R22 for refrigeration systems. This new … with mineral oil. However, R422D has a very high GWP, and it tends to worsen the efficiency of retrofitted R22 systems …. Consequently, even if R422D respects the limits of Montreal Protocol, its global environmental impact could be high. In this paper …

In this paper, the energy performance of a walk-in cooler working with R22 and its substitute R422D are experimentally … cooling capacity for R422D was lower than for R22, while the electrical power absorbed with R422D was higher than that with R …22. As consequence, the COP of R422D was lower than that of R22. Furthermore, technical proposals are introduced with the …