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Stupid Singaporean wants evaporation of reservoir water stopped!???!!

bic_cherry

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Stupid Singaporean wants evaporation of reservoir water stopped!???!!

Prevent loss of reservoir water through evaporation
PUBLISHED: MAR 9, 2017, 5:00 AM SGT
Given Singapore's hot weather, much of our reservoirs' water would be lost through evaporation.
If 50 per cent of the exposed surface areas can be covered with an impermeable floating material, the overall evaporation would be reduced by 50 per cent.
This would quite significantly cut the amount of water lost through the natural process of evaporation.
Surely, it cannot be that nobody has thought of this easy way of conserving the water in our reservoirs.
Mak Ngow Chai
http://www.straitstimes.com/forum/l...t-loss-of-reservoir-water-through-evaporation
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I think that Mr Mak should do some simple maths to find out the latent heat of evaporation of water and find that it is 2.26x10^6J/kg http://www.bbc.co.uk/bitesize/standard/physics/energy_matters/heat_in_the_home/revision/3/ which in kWh terms is 0.627778 Kilowatt Hours (kWh) https://www.flightpedia.org/convert/2260000-joules-to-kilowatt-hours.html (but actual result is more cos reservoir water isn't at 100degC which the latent heat figure assumes).

Thus without the immense cooling effect from evaporation of water from the reservoir, people will feel hotter, drink more water, bathe more often and use the aircon much more or drive down to an air con shopping centre and as I understand, half a commercial building water supply is consumed by the air-con cooling towers (fine jet spray water to cool down the heat emitting compressor coils) and approx 90% of building electricity costs is on electricity to run the air con compressor motor etc and I believe that all the gas turbine power stations in Singapore consume plenty of water as well... Every air-conditioning produces waste heat which induces surrounding neighbours to switch on their air-cons as well and then we wonder why the utility bills are all so sky high...

I don't know which school Mr Mak Ngow Chai attended or how many long in tooth 1998 national day awards http://www.pmo.gov.sg/national-day-awards/recipients?keywords=&page=3980&f[0]=field_award:155 he got but I think he should read up much more than just sprout silly suggestions like this (that just makes us all more hot and sweaty). And it also reflects very poorly on the state media of Singapore or on the PAP for that matter since I believe that the PAP has indeed been conducting such stupid experiments at Bedok reservoir for years. Just goes to show how penny wise and pound foolish all our PAP mandarins are. And if Mr Mak were really a long service employee of the MOH, it just goes to show how stupid his parent ministry must be.

* I unreservedly apologise if the smart alec letter writer is not the same Mr Mak who won the MOH 1998 long service national day award.
 
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