Exemplary Weather and Energy (EWE) Index May 2023

The Exemplary Real Time Year weather files (RTYs), current Reference Meteorological Year files (RMYs) and Ersatz Future Meteorological Years (EFMYs) used for these monthly simulations are available for purchase to allow clients to simulate their own designs for energy budgeting and monitoring rather than rely on analogy with the performance of these archetypical buildings and systems. Solar irradiation data courtesy of Solcast.

Archetypical buildings and systems

3-storey office

10-storey office

Supermarket

5kW domestic PV system

ADELAIDE

BRISBANE

CANBERRA

DARWIN

HOBART

MELBOURNE

PERTH

SYDNEY

ADELAIDE

Adelaide had a more humid and cooler May compared to the long-term average . The GHI was higher and the wind speeds were comparable.

Weather Index

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Energy Index (%)

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The solar PV simulation output results were 3.3% down on the average. Cooling peak loads saw a 14% decrease in the 3-storey office, 17% in the 10-storey office, while the supermarket saw a 22% decrease.

BRISBANE

Brisbane had a significantly less humid and cooler May compared to the long-term average. The GHI was higher and the wind speeds were comparable.

Weather Index

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Energy Index (%)

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The solar PV simulation output results were 17% higher than average, and all the building archetypes saw decreased cooling consumption. Cooling peak loads were 6.0% and 3.3% higher for the 3-storey office and the 10-storey office, respectively, while the supermarket saw a 7.4% decrease.

CANBERRA

Canberra experienced a more humid and much cooler and windier May compared to the long-term average. The GHI was also higher, leading to a 10% increase in the (more effectively cooled and thus more efficient) solar PV simulation output results.

Weather Index

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Energy Index (%)

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In our recent analysis of weather and energy building simulations, we have noticed a substantial increase in heating consumption across all building archetypes in Canberra. Upon careful evaluation, these results can be significantly attributed to the prevailing weather conditions. We have noted that the Dry Bulb Temperature has been significantly lower, whilst the Wind Speed has been substantially higher.

These conditions, combined with Heating Degree Hours value being more than double the Reference Meteorological Year Building (RMY-B), justify the observed increased heating demands despite higher Global Horizontal Irradiance Direct Normal Irradiance.

DARWIN

Darwin experienced a less humid and cooler May compared to the long-term average. GHI and wind speeds were higher, leading to a 1.2% increase in the PV simulation output.

Weather Index

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Energy Index (%)

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Compared to the long-term average, all the building archetypes had higher cooling consumption. Cooling peak loads were up 2.7% for the 3-storey office building, 4.4% for the 10-storey office building and 2.2% in the supermarket.

HOBART

Hobart experienced a marginally less humid and overall cooler May compared to the long-term average. The GHI and the wind speeds were higher. 

Weather Index

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Energy Index (%)

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The solar PV simulation output results were 5.6% higher than the long-term average. Heating peak load was 11% lower for the supermarket, and 20% and 17% higher for the 3-storey and 10-storey offices, respectively. 

MELBOURNE

Melbourne experienced a more humid and cooler May compared to the long-term average. The GHI and the wind speeds were higher. 

Weather Index

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Energy Index (%)

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The solar PV simulation output results were 3.1% higher than the long-term average. All archetypes saw a significant decrease in cooling peak loads. The 3-storey office saw a decrease of 28%, the 10-storey office saw a decrease of 46%, and the supermarket saw a decrease of 89%. 

PERTH

Perth experienced a less humid and warmer May compared to the long-term average. The GHI was higher, and the wind speeds were significantly higher. 

Weather Index

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Energy Index (%)

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The solar PV simulation output results were 4.5% higher than the long-term average. All archetypes saw a significant increase in heating peak loads. The 3-storey office saw an increase of 68%, the 10-storey office saw an increase of 89%, and the supermarket saw an increase of 36%. 

SYDNEY

Sydney experienced a less humid and cooler May compared to the long-term average. The GHI was higher, and the wind speeds were also generally higher. 

Weather Index

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Energy Index (%)

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The solar PV simulation output results were 15% higher than the long-term average. All archetypes saw a decrease in cooling peak loads, and an increase in heating peak loads. The cooling peak loads were 26% lower for the 3-storey office and 10-storey office, and 22% lower for the supermarket. The heating peak loads were 24% higher for the 3-storey office and supermarket, and 21% higher for the 10-storey office. 

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