"A little knowledge can be Dangerous".. it is a bit of an overstatement, but serves to drive home a good point.
Some cases encountered looking back:
1) Another example of "Didn't do it right first time"
A friend visited my BH before building his. He implement too the concept of pre-humidified the air between double walls. I visited his BH after some months into operation.. guess what?
Water sprinkled onto inner walls! All internal walls were soaking wet to the point nesting planks became moldy. Humidity > 95%!
2) Case of "solving a problem while creating another down the road"
Tweeter sound level deterioration - Solved by a new parallel link all the way back to amplifier. It works.. but unwittingly spun a spider web. Over time, you'll loose track which is what.. from here to where! So what is the root cause?
Worst if a wiring cross over mistake that "shorts" the output instead. It won't blow the amps immediately, but overheats it to failure gradually. Fancy trace wiring inside a dark BH? Better rewire all over again.
3) Case of "Taking a Panadol to cure headache ignoring the cause"
Whenever I came across use of exhaust fans (other than hanging sun screens) to cool the BH. That is like taking a Panadol. Sure it works by flushing out excess thermal energy.. but what is the root of the problem?
4) Case of "I know how" attitude, don't bother "if I don't understand"
Think this is the worst kind - problem is in the head too, not just in the bird house!
Some time back, I read in another blog someone labeled my "stupid logic" as I put in lay term "more humid air" rises.
If only one cares to understand deeper, water vapor being gaseous state of H2O, is lighter in molecular weight than Oxygen, O2, & Nitrogen forming the bulk of atmosphere.
In my application described... the humidifier was placed at bottom of staircase to serve 2 floors. Water vapor being lighter will drift upwards naturally to increase moisture content of upper level.
So the "I know how" attitude was quote:
"Hi v.... i have seen his blog and i think he is explaining with a stupid logic . More humid air is lighter than less humid air . I think i won't believe it . I have solved the room temperature myself and i call it an experience. " as proudly declared.
What was the relevance of its citation? Pretty amusing!
That alone tells how much the underlying issues being understood.
Everything that works, I need to understand how on a scientific basis. I rest my case.
7 comments:
Didn't really understand why water molecule lighter than O2, N2 and CO2. But come to think of it, it make sense! Else we wouldn't see clouds at the atmosphere. We on the ground will be covered by clouds. Have to go back to decades of chemistry how water converts from liquid to gas into mist then clouds then back to liquid forms again.
Eugene, good that this set you ponder deeper.
Common sense fix our perception water is heavier than air. But water vapor is in gaseous state.
The density of water vapor is 0.804g/litre, which is significantly less than that of dry air at 1.27g/litre at STP (i.e. 0 deg C & 14.504 psi).
Yes, water vapor going skywards to form clouds - isn't it common sense water vapor is lighter than air?
You should also read about latent heat, energy stored in molecule when it transit from one stat to another without temperature rise.. then you are on the way to think of the entire BH with a "Thermal model".
" I think i won't believe it . I have solved the room temperature myself and i call it an experience. " as proudly declared."
Don't ever argue with fools. They will always beat you with experience!
Agree, Eric. I just laughed.
Just bring to illustrate how some people's attitude toward idea beyond their comprehension.
It is not to belittle anybody. I try to highlight it is as mental block - ignorance is an internal enemy within us towards new learning.
That's why whenever you attend a Management Training seminar - first thing emphasized is always "A New Paradigm Shift" is needed.
do remember that all this is temperature dependent.
when the humdifier spews out air particles big and small... and depending on the relative humidity and tempreture difference btw ceiling and floor of say a room ..(say in a static situation except for the introduction of additional water by humidifire)
air molecules will continue to fill the room until 100% rh.
any excess will condense when dew point is reached.This extra water is heavy (water droplets -liquid form ..not gas) and will fall.
so, when there are leaks in the system as Charles has explained e.g. by way of vent holes,in/out holes etc a different set of weather driven variable and parameters come into
play.
To repeat, at any point if dew point is reached water vapor will condense (heavy).
water vapor will continue to break up into molucules of water(lighter) if the air tempreture allows it i.e. up to 100 % humidity. The higher the differential btw rh and dew point the easier the evaporation.
oops
I realized shouldn't talk too much at times. This topic can bruised egos.
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