Applications

Supermarkets

WoolworthsIn 2002, after carefully examining university analysis and available data, a major national supermarket chain in Australia decided to conduct its own fully fledged field trial.  It contracted an independent electrical engineering firm to set up energy meters dedicated to the air conditioning plants of two nearby supermarkets in South East Queensland.

One of the 3,300 square metre supermarkets received an application of Skycool to its roof, while the other remained as the benchmark.  Both buildings had been built and fitted out to a standard design criteria, so they were the ideal environment for obtaining a truly accurate picture of the effect of SkyCool.

The engineering firm took monthly readings of the air conditioning energy consumption.  Recording continued for more than two years.  The following charts covers periods of both drought and very wet tropical summers.  Throughout the entire period it is evident SkyCool maintained a power consumption level around 47% lower than the standard building.

Comparison Graph

In analysing this very powerful result it is important to be aware of a number of aspects surrounding this trial:

  • Both buildings had a standard 75mm (3 inch) sub-roof insulation which would inhibit the passage of internal heat outwards to the SkyCool coating, thereby limiting SkyCool’s maximum effectiveness
  • This exacting trial provides more direct proof of SkyCool than measuring temperature or power differences in a before/after scenario because this type of trial responds to near identical weather and involves very stable (i.e. unchanging) buildings, particularly with respect to power usage.
  • Cost of power in this region is one of the lowest in Australia, particularly for a very large national consumer, nevertheless, their SkyCool investment returned a pay back in less than three years - every year hereafter is a bonus to their bottom line.

 

Schools

A field trial was conducted in conjunction with The Department of School Education between December 2000 and April 2001 to evaluate the performance SkyCool in a demountable classroom environment at the Berkeley Vale Public School.
Portable classrooms are use throughout the state and have a reputation for overheating in summer creating a very arduous environment for concentrated education.  The demountable class rooms present a “worst case scenario” in which to trial SkyCool for the following reasons:-School Graph

  • unlike supermarkets or warehouses, much more of the solar energy enters the occupied space through the walls than the roof.
  • sub-roof insulation tends to trap in any heat entering the structure through windows and walls (as well as internally generated heat), keeping it away from SkyCool’s ability to radiate it into space,
  •  open windows and ceiling fans permit a high rate of external air exchange bringing in the hotter outside air which SkyCool has to constantly re-cool.

 

Despite these challenges SkyCool performed extraordinarily well. The maximum daily temperature of the SkyCool coated room during the occupied period of the trial (February to April, 2001) was maintained at or below external shade temperatures (ambient) for 84% of the time. On the hottest day in December the ambient temperature reached 38°C by 12 pm when the SkyCool coated room had barely reached 30°C. Whereas the uncoated class rooms peaked at 41°C.
 

Key Findings from this trial:-   

  • SkyCool was significantly more effective at maintaining lower internal temperatures than any previously tested heat-repelling or insulating coating.
  • Although there were many environmental factors beyond the control of the trial including cloudy weather, use of the air conditioning unit in one room, air-exchange factors and room population, SkyCool produced excellent results over the whole period.

 

SkyCool was shown to be one of the cleanest and easiest coatings to apply. There was no need to evacuate the region or even the room. The liquid coating is water based and contains no toxic components. With exterior spray painting it is usual to experience a 20-30% loss of material due to wind drift of the spray mist. The total spray loss factor with SkyCool was 1.4% - it didn’t even touch the boots of the applicators. Environmental and personnel safety are very important factors in the formulation of SkyCool.