SUPERMARKET SYSTEMS AND EQUIPMENT
was broader and the operating temperatures had increased.
Subsequent tests were conducted over three days with 30 openings per hour (every two minutes) for 12 hours followed by no door o penings for 12 hours. In the 30 openings per hour tests, the glass door cabinet demonstrated an even broader bandwidth and failed to recover to the operating temperature of -1 to +4°C, even after twelve hours with the doors closed. Adande’s managing director, Ian Wood, explained: “Understandably, many OEMs have e ngineered glass door cabinets to meet the BS EN ISO 23953 specification of 10 door openings per hour. However, the evaporators specified are not capable of dealing with the higher infiltration loads associated with more frequent door openings. This results in iced evaporators and a loss of temperature control or more frequent and harsher defrost cycles with increased energy consumption. Our tests clearly demonstrate that glass doors cabinets, designed for 10 openings per hour, experience significant loss of temperature c ontrol at an opening frequency of 30 openings per hour or more.”
A ccurate and stable holding temperatures have positive implications for food safety and quality, especially in the ready to eat snacking
market where food is not re-heated prior to consumption. Nobody wants to eat a salmon s andwich or sushi, which has been stored at too h igh a temperature and is liable to the rapid p roliferation of harmful bacteria and toxins. At the other end of the scale, a salad or pasta dish, in which ice crystals have formed, will be e qually unpalatable. Precise holding temperatures also contribute to extending the shelf life of p erishable foodstuffs, reducing the volume of chilled merchandise, which may be price
discounted or thrown away due to deterioration in quality or appearance.
Adande’s Engineering Manager (Aircell), Roland Rees, stated: “Understanding trading volumes for each refrigerated display area will help with the selection of the most appropriate cabinet, whether that be conventional open f ront, glass doors or Aircell. For busy food retailing applications, Aircell provides a tighter temperature bandwidth and the advantages of the shopper friendly open front multi-deck.
A IS FOR Armacell
New CIB New CIBSE approved CPD:
An introduction to the environmental considerations and as sessment methods when specifying thermal insulation materials, including: BREEAM Green Guide ratings and Environmental Product Declar ation (EPD) certificates.
Armacell UK Ltd, Mars Street, Ol dham, OL9 6L T: 0161 287 7100 E:
info.uk@armac
ell.com W:
www.armacell.co.uk LY
LY 39
®
Closed-cell nitrile rubber foam products have been aw arded an 'A' rating in the BREEAM 'Green Guide to Specification'.
een Guide to Specification'.
An independent Environmental Pr oduct Declaration further validates the material's low envir onmental impact, and combined with a mark et leading performance for condensation c ontrol (10,000 µ) and a low thermal conductivity value f or energy saving of 0.033 W/[m · K] at 0 °C, Armafl ex is the ideal insulation for HVAC-R systems.
The flexible elast omeric foam is also
safe to handle and easy to ins tall, with cutting patterns for insulating around valves and v essels available in the Armafle x Application Guide.
Added Microban® anti-microbial protection inhibit s mould and bacteria growth, meaning Armaflex is suitable for insulating HV AC-R pipe and ductwork on food and beverage production, pharmaceutic al, offic es, apartment s, schools and hospital project s.
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