Practical creation of refrigerating plants

Compressor unit can, for example, be installed in an adjacent storage room, with access to fresh air. Such device consists of a compressor driven by V-belt and electric motor. In addition, the frame carries with air-cooled condenser and receiver. Fan is mounted on the motor shaft to force air through the condenser and provide the necessary degree of cooling. The distinction between the compressor and condenser is known as the discharge line.

Today, the majority of compressors are used semi-hermetic and hermetic type. Of a receiver, non-insulated lines, liquid, taken out to the cold shop where he is connected to the expansion valve at the inlet of the evaporator. Evaporator built near-field attached plate for pipes. It is also equipped with fan forced air circulation and pallets.

At the outlet of the evaporator lines, suction line, brought back to the compressor. Diameter of the suction line a little more than the liquid line, because he bears vapors. For this reason, the suction line is usually isolated.

Figure B shows the momentary temperature in the refrigerating installation. At the compressor outlet pressure is 7.6 bar and a temperature of 60 C because of the presence of superheated gas. Temperatures in the upper part of the capacitor will quickly fall to saturation temperature, which at a pressure concerned will be 34 C, because overheating is removed, and condensation begins.

Outlet pressure receivers remain more or less the same, while the supercooling of the liquid starts, because the temperature dropped 2 C to 32 C.

In the evaporator pressure of 1 bar and evaporating temperature from -10 C are listed. In the last part of the evaporator, superheated steam is so, the temperature in the thermo - static expansion valve lamp becomes +2 C, corresponding to the value of overheating in the valve.

As shown below, the temperature of air will change is that the air will take the heat on his way from store products, walls, ceilings and other The temperature of the air blown through the condenser will also vary depending on the time of year.

Refrigeration installation, you must then are determined by the maximum stresses to which it is exposed. The possibility of placement of small loads, objects must exist in the plant for change of profitability. The process of making such changes is referred to as regulation and that regulation that Danfoss automatic controls designed. But this is a topic that is beyond the scope of this publication.

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