Abstract
A mathematical model describing the transient interactions in one-dimensional
two-phase flows with heat transfer is presented. A moving-boundary
refrigerant model is used to predict the position of the two-phase/vapor
interface. A boundary immobilization technique is used to predict
the temperature profile along the heat-exchanger wall. Typical results
of an evaporator model, in terms of interface position and discharge
superheat, are presented for inlet flow disturbances. The model is
then used in an overall heat-pump simulation to predict cyclic performance.
The results compare favorably to those obtained with a high-fidelity
spatially dependent heat-pump model, but require significantly less
computational effort.
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