Articles Posted in the " Refrigeration equipments " Category

  • Refrigeration-Fill in blanks-Evaporator

    Refrigeration-Fill in blanks-Evaporator

    Refrigeration-Fill in blanks-Evaporator Evaporator used in the domestic units is called ————-evaporator. Commercial refrigeration uses an evaporator which is called ————-evaporator. Industrial  refrigeration uses an evaporator which is called ————-evaporator. The evaporator is fitted between —————- and —————-.  Degree of super heat in dry evaporators is ————–. But flooded evaporator require   ————–degree of super heat. […]


  • Refrigeration-Fill in blanks-condenser

    Refrigeration-Fill in blanks-condenser

      Refrigeration-Fill in blanks-condenser Fill in the blanks for the condenser, receiver, drier cum filter and cooling tower Condenser removes ——— and ——— heat. The change of vapors into liquid in the condenser takes place ———— temperature. When vapors change into liquid in the condenser ————-remains constant. During change of vapors into liquid in the […]


  • Refrigeration -fill in the blanks-compressor

    Refrigeration -fill in the blanks-compressor

    Refrigeration -fill in the blanks-compressor           Compressor using a belt drive in a refrigeration system is called—————.  In a refrigeration system, compressor  is called the ———–of the system. The function of the compressor is to ————–low temperature and low pressure vapors. State of the refrigerant after compression is ——-pressure and ———–temperature. […]


  • Refrigeration compressors

    Refrigeration compressors

    Refrigeration compressors Mains types of refrigeration compressors  Three types of compressors are used. These are Reciprocating compressor Rotary compressor Centrifugal compressor List the compressors used with respect to the type of drive used. These are of three types. Hermetically sealed compressor—–when compressor and motor has the same shaft or coupled shaft and this assembly is […]


  • Thermostatic and Automatic Expansion valves

    Thermostatic and Automatic Expansion valves

     Thermostatic and Automatic Expansion valves Expansion valve in a refrigeration system is very important as it decreases the pressure as well temperature from condenser outlet conditions to evaporator inlet conditions. Capillary tube, automatic – thermostatic expansion valves, low side and high side float valves are used as expansion devices as per cooling requirements. Each has […]


  • Rotary Compressors in Refrigeration

    Rotary Compressors in Refrigeration

    Rotary Compressors in Refrigeration Definition: Rotary compressor compresses the refrigerant by the rotary motion of a roller eccentrically mounted in an enclosed cylinder. Function of the rotary compressor The function is same as that of the reciprocating compressor. It compresses the refrigerant from low pressure(evaporator pressure) to high pressure (Condenser pressure) and high temperature, maintains […]


  • * Refrigeration equipments-1

    * Refrigeration equipments-1

    Refrigeration equipments-1 Dry evaporators are used in domestic units where as flooded evaporators are in commercial and industrial units. Liquid suction heat exchanger ensures super heated vapor to compressor and sub-cooled refrigerant to the expansion valve. Refrigeration equipments includes compressors, condensers, evaporators,expansion valves, piping and various controls. TYPES OF EVAPORATORS: Dry expansion type and flooded […]


  • *Refrigeration Equipments-2

    *Refrigeration Equipments-2

    Refrigeration Equipments-2 Reciprocating, rotary and centrifugal compressors are used for refrigerants having lower, medium and high boiling points. Air, water and evaporative condensers are used in domestic, commercial and industrial plants. Cooling tower cools the hot water from the condenser for its reuse. COMPRESSORS:(i)  Reciprocating compressors: used with lower boiling temperature (much below 00C) refrigerants […]


  • * Evaporators

    * Evaporators

    Evaporators It is cooling coil in a refrigeration system. Normally its temperature is much lower than 0 o C. The liquid refrigerant enters into the evaporator and is converted into vapor by taking latent from the items to be cooled. The items to be cooled surround the evaporator. The evaporator inlet is connected to the outlet of […]


  • Capillary Tube

    Capillary Tube

      Capillary Tube Capillary tube is used as expansion valve in domestic refrigeration units. It is cheap and convenient. It has no moving parts and wear and tear is absent. It is used with hermetically sealed compressors.It is a very small diameter (0.026″ to 0.064″) copper tube. It is used as the expansion valve in […]