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General Aspects Of Fluid Flow

For a good understanding of the operation of refrigeration systems and their components, as well as the behavior of a fluid flow, extensive experience in the fluid mechanics important. In addition to the study of the principles of fluid flow, the student and/or engineer must develop an understanding of properties of the liquid, which should enable him or her to solve practical problems of cooling.

In practice, refrigerating engineers in contact every day or at least on an irregular basis with a large variety of fluid flow problems, such as

  • supercooled liquid refrigerant, water, brine, and other liquids,
  • a mixture of boiling refrigerant liquid and vapor,
  • a blend of refrigerants and sorbents;
  • a mixture of air and water vapor in moist air, and
  • high and low side of the refrigerant gas and other gases.
In order to efficiently cope with the flow of the fluid system is necessary to determine the flow of the categories identified in the core mathematical terms, which will allow appropriate analysis carried out by identifying suitable and acceptable simplifications.

An example of the categories that will be introduced include the variability in flow parameters with time (stable or unstable) or variations of the flow path (homogeneous or heterogeneous). Similarly, the effects of compressibility can be important in high-speed gas flows, but can be ignored in many of the liquid flow situations.

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