Above is a rule of thumb for latitudes up to Brisbane, which we are past. The website I got this from (www.greenhouse.gov.au) reccommends that for latitudes closer to the equator other forms of shading apart from just wide eaves be used, such as the louvred eaves below.
| Midwinter noon sun angle | = | 90 – (Latitude + 23.5) |
| Midsummer noon sun angle | = | 90 – (Latitude – 23.5) |
| Equinox noon sun angle | = | 90 – Latitude |
This gives the sun angles for the different times of year. We now have to decide what times of the year we would like to block out the sun to make the best use of our thermal mass.
1 comment:
I think the latitude is about 20 degrees. I've got a map of the areas so I'll bring it in. I think we will really be wanting to get the sun hitting the thermal mass wall in the middle months of the year as that is when the nights are really cold. We will want the heat from the day to be released at nigth. I'm not sure what the temperatures do in the summer months. I guess our temperature research will reveal all.
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