R134A 热力性质
It is a pure refrigerant with an ODP equal to zero and a GWP lower than that of R22 (GWPR22=1700; GWPR134a=1300), as presented in Table 1 [1], [2]. Its saturation pressures are 40% less than those of R22. Although replacement of R12 by R134a for refrigeration has been widely ...
However, in the case of saturation adsorption, the desorption heat of R32 was lower than that of R1234yf and R1234ze(z). The addition of MOF-74 nanoparticles (NPs) could enhance the energy storage capacity of the pure refrigerant; besides, R1234yf and R1234ze(z) nanofluids had superior...
In addition, they use HFC refrigerant. Characteristics of HCFC, HFC refrigerants, and HFO refrigerants are summarized in Table 1. HFO refrigerants R1234yf and R1234ze(E) have the same ODP (Ozone depletion potential) as R134a. Their GWPs (Global Warming Potentials) are also very low. In ...
The cooling capacity per unit volume of the four refrigerant units is shown in Table 2. It can be seen that the cooling capacity per unit volume of R1234yf and R1234ze(E) is not much different from that of the R134a unit, the cooling capacity per unit volume of R1234yf is 0.95 tim...
To further investigate the impact of thermal effects on the cavitation process within the prototype, the numerical simulation modifies the saturation pressure of the refrigerant from a non-isothermal model, represented by a polynomial function of temperature, to an isothermal model. Table 3. Comparison...