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Packed Commercial System Components

Many commercial systems are in the form of packaged system. The condensing unit and the evaporator, piping and electrical systems are contained in one unit. Figure 13-2 shows a packaged unit. High-pressure side includes:
  • Compressor, usually sealed.
  • Capacitor, as a rule, air-cooled,
  • Liquid receiver when the thermostatic expansion valve or automatic expansion valve is used.
  • High-pressure safety control engine.
  • Liquid line with drier sight glass and.

Refrigerant management from the point of separation between the side of low and high side of the system. It consists of automatic thermostatic expansion valve or capillary tube. Low-pressure side consists of:

  • Evaporator.
  • Low pressure or temperature control engine,
  • Suction linesome with the filter-dehydrator and expansion tanks.

packaged system includes multiple evaporators.

High-pressure side includes:

  • Compressor, often with an oil separator.
  • Capacitor, air or water cooled.
  • Liquid receiver.
  • High pressure, engine control systems,
  • Liquid line with desiccant and sight glass.
  • Water valve, water-cooled units.
Refrigerant management point of separation between the high-pressure side low pressure side. Low-pressure side includes:
  • Refrigerant management (two or more). These, as a rule, the thermostatic valves.
  • Evaporators (two or more). They can be natural convection and forced convection, or under water.
  • Motor control, usually operated pressure.
  • The suction line with drier and the controller suction pressure.
  • Two temperatures, fittings for multiple installation temperature.
  • Expansion tanks for rapid decrease in pressure changes.
  • Check valves for several installations of temperature.
There are many varieties of commercial systems. Water chiller system. Hypothermia is used at low temperature units, such as cabinets, freezers and other Process hypothermia reduces the temperature of the refrigerant in the liquid line below the saturation temperature. The lower the temperature in the liquid line, the more a system of heat removal capacity. This will lead to a more efficient system,

Hypothermia is carried out by cooling the liquid line at a low temperature system. High-temperature systems, such as the air-conditioning unit. High-temperature systems remove Heat three times more efficiently than the low-temperature refrigeration systems. High temperature air conditioning and low temperature freezer cases work together. Two systems to improve the overall efficiency of the refrigeration process.

Hypothermia systems can also be added to existing refrigeration systems in supermarkets. In subcooler installed in a shop, a high temperature of the air conditioning system. Capacitors are usually mounted on a steel base. In the external drive, the motor-compressor is installed outside. It drives the compressor either directly, or with one or more belts.

In a sealed unit, the motor is connected directly to Tina compressor. Fig. 13-7 shows the context and internal parts. Carter and pressure, are translated at run time. This is done by clearing the crankcase pressure tube and spinner pipe. Equalization of pressure, prevents the oil from the compressor at start. For large commercial installations, compressors are manufactured with three, four, five, six, seven, or more cylinders.

Compressors also named for their location cylinders. Some of them operate in a single vertical, horizontal, single, 45 single (sloping, vertical two-cylinder, V-shaped two-cylinder, W-type, three-cylinder, radial three cylinder, vertical four-cylinder, V-type four cylinder. There are also many crankshaft arrangements. Inside construction of multiple-cylinder.

Six of compressor cylinders with an external drive motor is shown in Fig. 13-9, He has crank throw type crankshaft. Steel frame is used to hold the shell-and-tube condenser sealed unit.

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