David Evans

I cannot answer this but it could be helpful for whoever attempts to for a temperature profile throughout the year at the location planned to be supplied.Also whether you plan to use electricity from the grid or solar electricity production.

Good morning, KennethI watched your video. The information described trends in a qualitative manner.Do you happen to have any graphs showing eggs laid numbers vs stocking density and feather counts vs stocking density?Is there any area/bird which you would describe as optimal?Cheers,David.

Message for Dr Charles Ibe Look at pages 26 and 27, in particular, of http://www.ata.org.au/wp-content/uploads/cool-roofs.pdf This may be some help. Also you may search for emittance values of metals and compare aluminium and iron. That may guide you as to the best type of metal roofing to use. Note - the best solution is different for hot climates (such as yours) and cold climates so views ...

Reply to Dr Ibe Using aluminium roofing would be the wrong thing to do.

Replying to Dr Charles Ibe Aluminium is the best reflector of infrared (heat) radiation so an aluminium paint seems an attractive solution. It will reflect solar infrared radiation very effectively. However it will also reflect infrared radiation coming up from the inside of the poultry house back down again, which is not so good. (At night one would want it be escaping.) So, what one really n ...

Thank you for the advice Mike. I would be keeping the wind-chill fans operating to endeavour to keep the birds feeling the desirable temperature for their age/weight. Perhaps I should have said that but perhaps that would be insufficient - a comment on this would be welcome. Layers like to perch when sleeping. Are broilers too heavy to perch or just not inclined to if they had perches available ?

A component of Heat Stress is the production of heat by metabolism. One way metabolism might be minimized during the hottest part of the day is to have the birds sleep period from around 11am to 5pm. They will stop eating and generating heat by exercise with the result that they will produce less heat internally. Unless something in a bird's diet reduces its metabolic rate additives will not be ...

Mitigating Heat Stress in Poultry Introduction Try blowing on your hand with it about an inch from your mouth. You should feel a warm breeze. Blowing out of one's mouth in cold conditions may result in what looks like steam - it's easier to watch someone else doing that. The 'steam' is water which came from your lungs as invisible water vapour, condensing due to the temperature of the air being be ...

The effectiveness of fans at inducing wind-chill comfort for birds depends a lot on the speed that the air is reaching the birds. The speed of the air is reduced by obstructions and the material of the cages may be reducing the speed of the air reaching the birds. In cages the birds are in a line and they may be blocking the ones downwind themselves. Between these two types of obstruction the ...