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Roof cooling for new ICI system
Page 34
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A NEW system of vehicle refrigeration for transporting frozen food to shops, hotels, restaurants and catering centres is being marketed by the Industrial Products Department of ICI Agricultural Division.
The system, known as "Koldroof", uses the "Drikold" dry-ice solid carbon dioxide refrigerant already consumed in ICI's "Koldstream Gard" system for the chilling of food in retail delivery vehicles.
Koldroof has been designed to reduce temperatures sufficiently to convey frozen, rather than chilled, foodIt has been developed in conjunction with Wall's Ice Cream and has been undergoing trials in ten vehicles with this company for the last 12 months.
ICI claims that the main advantages of this design compared with alternative systems are the saving of weight and flexibility in operation. The vehicles used in the experiment, 6.5-tongvw Leyland Terriers, are classified below the hgv limits but are still capable of transporting 3,5 tons of frozen food.
This, says ICI, represents a saving of 2.5 tons gvw compared to other refrigeration systems which make use of heavier eutectic holdover plates in vehicles of around 9 tons gvw and can only carry the same payload.
The Koldroof system is also said to be up to .£1,000 cheaper than conventional units.
The Koldroof system is claimed to maintain temperatures down to —20°C (-4°F). If temperatures inside the vehicle rise, when, for instance, the loading door is opened, a thermostat switches on the electric fan to circulate the cold gas.
Drikold is supplied in 11-34
ICI's new refrigeration system, known as Koldroof and which uses Drikold, the dry-ice solid carbon dioxide refrigerant, is fitted to this Leyland Terrier. Cold refrigerated gas, produced by evaporation of Drikold, is circulated through these tubes in the roof by means of a simple Smiths electric fan. Low temperatures are maintained for the distribution of frozen food and ice cream.
Kg (25lb) blocks and is lo into the unit through an e nal hatch, making it pos to "re-ice" without ent( the vehicle's cold com ment. The unit capacity i blocks of Drikold, but ICI that daily requirements vary according to sizt vehicles and conditions. unit is made of alum ii tubing and sheet with joints argon arc welde seal the system.