A few months ago I wrote a blog posting about how tighter regulation of electricity supply voltages could save Australia 15 million tonnes of greenhouse gas a year.

However a comment on that posting suggested that voltage reduction may not result in any useful savings.
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If LED lighting continues to develop as fast as it has over the last five years, within ten years it may well be the main form of lighting in use across the world. And lighting in new buildings may look radically different to what it does now.

The major advantage of LEDs is that they are a directional light source. Most other artificial light sources on the market radiate light in all directions. Incandescent light bulbs, compact fluorescent lamps, fluorescent lamps and high intensity discharge lamps such as metal halide all radiate light in all directions.
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Earlier today I interviewed Cameron Schuster, Sustainability Manager of Wesfarmers Limited. Wesfarmers owns Coles, Bunnings, Kmart, Officeworks, Target and a large number of other businesses.

Cameron’s says the following three things are critical to any organisation wishing to cut their carbon emissions.
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A recent study by IBM published in Forbes magazine says that whilst many companies want to reduce their carbon footprint, many do not have the measurement systems in place.

The study says that “Companies aren’t collecting and analyzing the information they really need or aggregating it often enough. Because of that, they can’t implement real changes to fundamentally increase efficiency, lower costs, reduce environmental impact and improve their reputations with key stakeholders.”
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Free cooling takes advantage of cold outside air to cool a warm building. Strictly speaking “free cooling” isn’t free as energy is used by fans to move air from inside to outside. Free cooling is beneficial for any building where there are significant heat loads inside.

Server rooms and data centres can benefit enormously from free cooling, and in fact is the main reason why Google’s major server rooms are located in cold climates. It’s also beneficial for large office buildings where internal heat loads from people, lighting and office equipment mean that the core of the building is warm, even though it may cold outside. Buildings with glazing facing the sun can often benefit due to the heat load from solar heat gain. Its been our experience that in temperate climate’s such as Melbourne even small buildings can benefit from free cooling.
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