| Popis: |
The world-wide agreement to restrict the use of chlorofluorocarbons (CFCs) and hydrofluorocarbons has prompted research into the possibilities of replacement refrigerants, particularly those occurring naturally in the environment. One such natural refrigerant, carbon dioxide, has been considered for certain refrigeration and air conditioning applications. In order to evaluate the potential performance of a refrigeration cycle based on carbon dioxide, a cycle model has been developed which can simulate the operation of a carbon dioxide based refrigerator/air conditioner. This model is called ACCO2 and accounts for the realistic effects of the thermo-physical properties of carbon dioxide. The model simulates the operation of a carbon dioxide based air conditioner that uses air as the heat source and heat sink. A parametric study has been conducted using ACCO2 as well as a validated cycle model which simulates the operation of an HCFC-22 based packaged air conditioner designed for use by the U.S. Army in a c... |
