% Plot the PH diagram figure; contourf(enthalpy, pressure, v, 'LineStyle', 'none'); colorbar; xlabel('Enthalpy (J/kg)'); ylabel('Pressure (Pa)'); title('R134a Pressure-Enthalpy (PH) Diagram'); This would plot the required result, please note that using "CoolProp" through...
h specific enthalpy [J kg À1 ] I efficiency index [À] j dimensionless vapor velocity [À] L overall length of a subsection [m] lc liquid content [À] _ m refrigerant mass flow rate [kg s À1 ] M measured quantity ...
2 and 3, an exemplary refrigeration cycle of one embodiment of the refrigerant vapor compression system 2 is illustrated with reference to a carbon dioxide Pressure-Enthalpy diagram. At a point A, the refrigerant enters the compressor 12 at the suction port 44 and is pumped to a higher ...
At the atmospheric boiling point, the entropy of vaporisation per mole is roughly constant for all fluids (Trouton’s rule). Since the enthalpy of vaporisationhfg=T·sfg, it follows that fluids with a lowmolecular weight, such as water, have a large enthalpy of vaporisation and, consequently...
Referring to FIGS. 2 and 3, an exemplary refrigeration cycle of one embodiment of the refrigerant vapor compression system2is illustrated with reference to a carbon dioxide Pressure-Enthalpy diagram. At a point A, the refrigerant enters the compressor12at the suction port44and is pumped to a hi...
If g is the acceleration of gravity, Vg is the gas velocity, hg is the gas enthalpy per unit mass, z is the elevation with respect to a reference point,ρ is the gas density, and ug is the gas internal energy per unit mass, then the energy-balance equation in its differential form ...
transfer databases for HFE 7100, R 134a, and water that have been amassed over the past decade at the Purdue University Boiling and Two-Phase Flow Laboratory (BTPFL). 2. Experimental methods Fig. 1 shows a flow diagram of the system developed for the ...
and that of the vapour CO2 at the temperature of the condenser inlet, respectively; while icon,in is the enthalpy of the two-phase CO2 at the condenser inlet given byicon,in=ipre,in+QpremCO2where ipre,in is the enthalpy of the liquid CO2 before entering the pre-heater, mco2 is the ...
R-134a is heated as it passes through the pre-heater to adjust the quality of the inlet vapor before flowing into the microchannel test section. Figure 1. The schematic diagram of the experimental devices. Figure 2 depicts the structure and details of the microchannel test section. There are...
where Qpre and Qtest mean the net heating powers, hpre,in means the enthalpy at the pre-heater inlet, hlv,test,in, hlv,test,out, hl,test,in, and hl,test,out mean the latent heat of vaporization and saturated liquid enthalpy at the test section inlet and outlet, respectively. For hor...