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DEVELOPMENT OF REFRIGERATED STORAGE FOR DECIDUOUS FRUITS.

Author(s) : WORTHINGTON-SMITH P. S.

Summary

THE CHANGES WHICH HAVE TAKEN PLACE SINCE 1960 ARE DISCUSSED. STORAGE ROOMS WERE SMALL, CAPACITY CIRCA 100 TONS, INSULATION WAS CORK, AIR CIRCULATION WAS BY CEILING FANS OR STANDING UNITS, TEMPERATURE CONTROL WAS BASED ON THE TEMPERATURE OF AIR RETURNING TO THE COOLER. DEVELOPMENT OF BULK BINS AND MECHANICAL HANDLING NECESSITATED COOLING BY A CENTRAL DUCT SYSTEM DELIVERING COLD AIR FROM ONE OR TWO LARGE COOLERS TO GIVE BETTER AIR DISTRIBUTION AND MAXIMUM HEAT TRANSFER. THERMOSTATS CONTROLLED THE TEMPERATURE OF THE AIR LEAVING THE COOLERS SO THE DIFFERENCE BETWEEN REFRIGERANT AND AIR COULD BE REDUCED TO AVOID FREEZING OF FRUIT. COOLING RATES IN STACKS TENDED TO BE VARIABLE. BECAUSE OF THIS THE FALSE CEILING SYSTEM WAS DEVELOPED. COOLERS AND FANS ARE INSTALLED ABOVE A FALSE CEILING AND THE AIR IS FORCED TO PASS THROUGH THE STACKS OF FRUIT BACK TO THE COOLER. TWO SPEED FANS ARE USED TO REDUCE AIR FLOW ONCE THE TEMPERATURE IS ES OF STORE. THE CONSTRUCTION OF STORES HAS CHANGED. POLYSTYRENE IS USED FOR INSULATION, LIGHT WEIGHT PREFABRICATED PANELS FOR ROOFING AND WALLS ALONG WITH SHEET STEEL FOR SUPPORT AND PROTECTION ENABLE LARGE STORES TO BE ERECTED QUICKLY, AND AT LESS COST THAN THE EARLIER TYPES. FLOORING IS LAID ON THE EARTH AS GROUND INSULATION HAS BEEN FOUND TO BE UNNECESSARY. THE INCREASE IN SIZE WITH FALLING COSTS OF CONSTRUCTION ARE SHOWN GRAPHICALLY. BUT NOT SO SIMPLE WITH HALOGENATED HYDROCARBONS. THEY ARE DISCUSSED. PARAMET.

Details

  • Original title: DEVELOPMENT OF REFRIGERATED STORAGE FOR DECIDUOUS FRUITS.
  • Record ID : 1981-1289
  • Languages: English
  • Publication date: 1980/06/17
  • Source: Source: Frigair '80, Pretoria
    pap. 18; 12 p.; 5 fig.
  • Document available for consultation in the library of the IIR headquarters only.

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