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  Refrigeration and Air Condition

  Cutaway Model Hermetic Refrigerant Compressor

  Hermetic refrigerant compressors like, e.g., the have a welded sheet steel housing. The drive motor and refrigerant compressor are fitted in this capsule. Unlike open compressors, the refrigerant compressor is directly connected to the drive motor and therefore does not require any floating seal. The motor compressor is suspended by springs in the capsular housing which minimises the transmission of vibration to the capsule body, thereby reducing noise emission.

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  Refrigeration and Air Condition

  Oil Return in Refrigeration Systems

  The unit addresses the problem of oil return in refrigerant circuits. In refrigerant circuits the lubricant is carried through the pipe system by the refrigerant. Oil may impact the compressor if the system is overfilled. If the system is underfilled the compressor may run dry. The selection of the correct diameter and arrangement of pipework is therefore of key importance. The effect of the refrigerant flow rate on the oil return to the compressor is demonstrated on this unit with the aid of glass intake pipes. A complete refrigerant circuit is mounted on the rear of the demonstration panel. To demonstrate the effect of different pipe diameters and routing, individual sections can be selected using ball valves. Pressures and flow rates are measured in the refrigerant circuit. The laboratory trolley mounted system is flexible and suitable for use in different seminar or training rooms.

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  Refrigeration and Air Condition

  Experimental Module Refrigeration System

  The facilitates fundamental experiments in the area of refrigeration engineering. The unit contains a closed refrigerant circuit with open compressor, a condenser with switchable fan and an evaporator in a refrigeration box with transparent door and an adjustable heat load. The compressor is powered by a V-belt using the drive unit HM 365. A pressure controller prevents unacceptable pressures through electromagnetic opening of a bypass valve. All temperatures, pressures, the speed of the compressor, the heat load and the refrigerant mass flow rate are recorded electronically, indicated on digital displays and transferred to a PC (not included). The software and the data acquisition card are part of the unit.

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  Refrigeration and Air Condition

  Refrigeration Technology Demonstration Panel

  The system is designed for the demonstration of the cyclic process on the p-h state diagram. The experimental set-up is clearly arranged on a metal panel with a system schematic. The use of commercially available components such as a finned pipe condenser and coaxial evaporator ensure a high degree of relevance to practice. A cooling load can be applied to the evaporator using water connections. Instruments enable the processes in a cooling system to be investigated and the energy transfers balanced.