Abstract
Distributed dynamic models of a simple coaxial-type evaporator are
implemented in the simulation tool Sinda/Fluint. In order to
obtain data for model validation an experimental set-up is built,
where dynamic responses to changes in inflow and/or outflow of
refrigerant are recorded. Model validation shows that the dynamic
response of the homogeneous model is too fast whereas the
simulation results based on the slip-flow model agrees very well
with the experimental results. Another difference in the results
from the two types of models is the estimation of charge. The
charge calculated by the use of the homogeneous model is
approximately a factor 3 less than the charge calculated using the
slip-flow model.The overall conclusion is that when one wants to
investigate the dynamic behaviour due to the movement and amount
of the refrigerant in the evaporator, then it is needed to use a
slip-flow two-phase model as the homogenous model produce a too
fast response.
| Original language | English |
|---|---|
| Title of host publication | Experimental evaluation of the use of homogeneous and slip-flow two-phase dynamic models in evaporator modelling |
| Publication date | 1999 |
| Publication status | Published - 1999 |
| Event | 20th International Congress of Refrigeration - Sydney, Australia Duration: 19 Sept 1999 → 24 Sept 1999 |
Conference
| Conference | 20th International Congress of Refrigeration |
|---|---|
| Country/Territory | Australia |
| City | Sydney |
| Period | 19/09/1999 → 24/09/1999 |