On the other hand, the necessary increase in condensation pressure to produce the higher subcooling produces a decrease in the COP.
Low subcooling is obtained with an almost undetectable increase in condensation pressure, this leading to an effective increase in COP.
2008, 2009), and do not cover flow condensation pressure drop characteristics.
These studies show that flow condensation pressure drop characteristics of refrigerant-oil mixtures are affected by the properties of refrigerant-oil mixtures.
Whereas in the case of conventional A/Cs, the condensation pressure remained almost the same when the outdoor temperature dropped lower than about 15[degrees]C (59[degrees]F), the new A/C can be operated even when the condensation pressure is reduced further, even with outdoor temperatures common in winter months (Figure 3).
Furthermore, reducing the condensation pressure increases specific enthalpy for the refrigerant in the evaporator (Figure 4).
In the reversed Rankine cycle the compressor outlet pressure is dictated by the condensation pressure
corresponding to the condenser temperature.