Articles Posted in the " Refrigeration " Category

  • Fill in the blanks regarding refrigeration from the university question papers.

    Fill in the blanks regarding refrigeration from the university question papers.

    Fill in the blanks regarding refrigeration from the university question papers. An oil separator is always placed in the ————-line. A crank case heater is connected in such a way so that it is ———–when the compressor is off. The compressor is called the ————- of the refrigeration unit. Anemometer is used to measure the […]


  • Fill in the blanks for motor controls and basic electricity  used in refrigeration

    Fill in the blanks for motor controls and basic electricity  used in refrigeration

    Fill in the blanks for motor controls and basic electricity  used in refrigeration Thermostat is connected in ——-circuit with the electric motor. Thermostat works on the temperature ———of the evaporator. The feeler bulb of the thermostat is connected at the ———— of the evaporator. Motor ———at the cut in point of the motor control. Motor […]


  • REFRIGERATION: TROUBLE SHOOTING SHEET 3

    REFRIGERATION: TROUBLE SHOOTING SHEET 3

    REFRIGERATION: TROUBLE SHOOTING SHEET 3 UNIT RUNS CONTINUOUSLY   Sr.No. Possible cause Check and remedy 1. Improper refrigeration Check for shortage/excess of refrigerant, poor condensation, choking in the refrigeration cycle, inefficient compressor, door leakage etc. and do the necessary repair or replacement 2. Adjustment of thermostat at very low temperature Check the thermostat setting and […]


  • REFRIGERATION: TROUBLE SHOOTING——–SHEET 2

    REFRIGERATION: TROUBLE SHOOTING——–SHEET 2

    REFRIGERATION: TROUBLE SHOOTING——–SHEET 2 UNIT IS RUNNING BUT NOT GIVING THE DESIRED COOLING Sr. No. Cause Check and remedy 1. Improper Thermostat setting Check for setting and do the necessary correct adjustment. 2. Shortage of refrigerant in the unit Run the unit. Check for frost on evaporator because of low pressure. Also check for condenser […]


  • REFRIGERATION: TROUBLE SHOOTING————-SHEET 1

    REFRIGERATION: TROUBLE SHOOTING————-SHEET 1

    TROUBLE SHOOTING IN REFRIGERATION AND AIR CONDITIONING——SHEET 1 UNIT DOES NOT RUN AT ALL UNIT RUNS BUT NO COOLING UNIT RUNS BUT PRODUCES LESS COOLING UNIT RUNS CONTINOUSLY UNIT TRIPS TIMES AND AGAIN NOISY UNIT UNIT DOES NOT RUN AT ALL   UNIT DOES NOT RUN AT ALL Sr. No. Cause Check and remedy 1. […]


  • FILL IN THE BLANKS FOR THE REFRIGERATION EVAPORATOR

    FILL IN THE BLANKS FOR THE REFRIGERATION EVAPORATOR

    FILL IN THE BLANKS FOR THE REFRIGERATION EVAPORATOR The evaporator used in the domestic units is called ————-evaporator. The evaporator used in the commercial refrigeration units is called ————-evaporator. The evaporator used in the industrial refrigeration units is called ————-evaporator. The evaporator is fitted between —————- and —————-. The degree of superheat in dry evaporators […]


  • FILL IN THE BLANKS FOR THE REFRIGERATION EXPANSION VALVES

    FILL IN THE BLANKS FOR THE REFRIGERATION EXPANSION VALVES

      FILL IN THE BLANKS FOR THE REFRIGERATION EXPANSION VALVES The expansion valve controls the flow rate of refrigerant and also ————the pressure. The expansion valve is fitted between the———–and the—————–. The temperature of the refrigerant decreases because of decrease in———-temperature. The boiling point of the refrigerant increases with the —————–of pressure. The state of […]



  • REFRIGERATION : FILL IN THE BLANKS FOR THE REFRIGERATION COMPRESSOR

    REFRIGERATION : FILL IN THE BLANKS FOR THE REFRIGERATION COMPRESSOR

    FILL IN THE BLANKS FOR THE REFRIGERATION COMPRESSOR Compressor using a belt drive in a refrigeration system is called—————. Compressor in a refrigeration system is called the ———–of the system. The function of the compressor is to ————–low temperature and low pressure vapors. The state of the refrigerant after compression is ——-pressure and ———–temperature. Compressor […]


  • REFRIGERATION: FILL IN THE BLANKS FOR THE REFRIGERATION SYSTEMS

    REFRIGERATION: FILL IN THE BLANKS FOR THE REFRIGERATION SYSTEMS

    REFRIGERATION: FILL IN THE BLANKS FOR THE REFRIGERATION SYSTEMS   There is no ———–part in a vapor absorption system. The material of piping in vapor absorption is—————–. Liquid refrigerant —————-in the evaporator. Receiver is fitted after the —————-unit. An accumulator is fitted between ————– and ————–. An accumulator separates ————-and ————. The function of the […]