Figure 9(b) shows that the saturation temperatures
at the condenser outlet (computed from the measured pressure) for R-134a and R-516A were also very close to each other.
Using the measured values of pressure and the calculated value of [H.sub.2]O mole fraction in the exhaust, the saturation temperature
was calculated for different engine speeds.
Figure 7a and b gives maximum steam rise rate versus steam saturation temperature
for two different [k.sub.rg] values.
Starting on the left, the purpose of the feedwater system is to take subcooled water and heat it until it reaches saturation temperature
(i.e., until it reaches the left edge of the saturation curve in [ILLUSTRATION FOR FIGURE 2 OMITTED]).
The heat exchange rate from the platform to the refrigerant is directly dependant on the temperature difference between the plate and the saturation temperature
of the coolant.
The highest steam content was noticed at the point where the coolant temperature reached the saturation temperature
Thus the temperature of the tube outer wall was low and did not reach saturation temperature
of the fluid (373.15 K).
As shown, the melting temperature does not change obviously with the increase of saturation temperature
(only one main endothermic melting peak is observed at around 168[degrees]C) while the melting peak shows a tendency to become narrow with increasing [T.sub.s].
The model assumes the same condenser and evaporator saturation temperatures
, evaporator leaving superheat, condenser leaving subcooling, and compressor isentropic efficiency for all refrigerants.
The dew-point temperature along with the dry-bulb temperature and atmospheric pressure measurements were used to determine the "true" wet-bulb temperature and adiabatic saturation temperature
associated with each test condition.
Since the liquid refrigerant supply temperature is below the saturation temperature
corresponding to the EPR pressure setting, the liquid refrigerant entering the evaporator has to absorb heat to sensibly raise the refrigerant temperature until it reaches its saturation temperature
corresponding to the operating pressure prior to its boiling.
The refrigerant within the tubes is desuperheated and then it quickly reaches the saturation temperature
where the gas is condensed into liquid.