As discussed above, when there is noncondensable gas in the system, the calculated condensing temperature should be higher than the actual measured condensing temperature, so [DELTA][T.
The coefficients in Equation 9 are determined from the "Normal 2" benchmark test and all fault tests other than the noncondensable gas fault test in the 1043-RP project.
The scope of this study was limited to six common faults: reduced condenser water flow fault, reduced evaporator water flow fault, low refrigerant charge fault, refrigerant overcharge fault, condenser fouling fault, and noncondensable gas fault.
In the LFEC, isothermal compression and expansion are approached by mixing a nonvolatile liquid with a noncondensable gas
during the compression and expansion processes.
Caremoli (1983) also developed a 2D computer code called CALICO to calculate the pressure drop, the noncondensable gas
distribution, and the heat transfer rate.
In addition, service faults, including refrigerant undercharge and overcharge and noncondensable gas, can be eliminated as well.
Refrigerant overcharge and the presence of noncondensable gas have similar symptoms with limited measurements, so it takes significant diagnosis time figure them out.
From the macroscopic and overall system point of view, the only discrimination among the seven faults of refrigerant leakage, compressor valve leakage, condenser fouling, evaporator fouling, liquid-line restriction, refrigerant overcharge, and noncondensable gas is the directional change of the overall system state variables' residuals.
So, noncondensable gas is considered to be a component-level service fault.
0] containing noncondensable gas
in an infinite volume of viscous liquid.
Laminar film condensation in a vertical tube in the presence of noncondensable gas, Applied Mathematical Modelling 29: 341-359.
A two-dimensional, steady state model of convective film-wise condensation of a vapour and noncondensable gas mixture flowing downward inside a vertical tube was developed in paper .