Sunday, 20 March 2011

down draught evaporative 16/03 Dan's/Zoe's advice

zoes boyfriends advice :))) 


cant calculate it myself!






... if it's just down-draught you're looking at then it's very simple - you spray cool water at the top of a funnel and the air is cooled, it drops downwards, creating a cool area at the bottom of the funnel. That is apparently a pretty basic thing to do.  

I asked what the difference is going to be in the temperature that you can achieve, in a different country.  And he laughed and said "for those kind of complex calculations you need to pay someone to work it out." He explained that in maths and engineering terms there are 'trivial calculations' and 'non-trivial'. 

Trivial (i.e. basic level) he would explain to you how do those - if you were dealing in basic level maths.  
But working out the height of a cooling tower, what temperatures you can achieve etc. - that's highly complex and 'non trivial' calculations, and there is no book that will explain this to you - you need an engineering degree and a day to work out the calcs! 


Dan suggested that what you might create is a Hot Tower Cool Tower.  A quick scribble attached - you have a cool tower (shown on the left) where air enters, you spray it with water, makes the air cool and it drops down into a space = cool space. 
As the air heats up it is drawn into another tower (shown in sketch on the right) - this second high tower drawing the hot air up and away, creating air movement and a passage of air travel. 




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