Hi My Seniors,
Me need some help.
Its been said that at least 6-7 times the water turnover, then the pool water gets a 100% filtration.
I completely agree, in fact my database seems to show 9 times being best and that need a 1 micron slime bag assisting.
One of my boss is making a pool. Target size is 20 meter long x 4.5 meters wide x 1.5 meters = 135,000 liters of water.
I been thinking, in my city high airborne dust, 8 hours per turnover is borderline and recovery is slow at this 8 hours.
Recovery meaning people in pool causing reduced clarity.
My 135,000 liters pool to have great clarity stability, I need my 2HP pump to run 24/7 non stop 365 days a year and come bather load, the extra 1.5HP on trolley will be used to assist.
My friend's pool of 225,000 liters now uses 4 x 1.5HP to get the clarity stability and recovery similar to my pool and that is an approx 4.7 hours per turnover.
Keeping aside pumps and filters cost, I did the calculation on the electrical power requirement which for my city is at US$0.15 per KwHour, if I use 14 of 0.75HP pump at 15 psi head loss but run it for 2 hours a day or 2x turnover and add 1 of 0.75HP as an 8 hour pump to circulate top layer of water which I assumed will have its chlorine reduced by sunlight during day time, the electrical cost is lower than 8 hour turnover 2 x 1.5HP pumps but running 24 hours a day.
The catch is, I must create a moving water to reduce mixing of old and filtered water like in a conventional pool.
At 1 hour turnover of 135,000 liters per hour group of pumps, I can in theory will make the water move 33 centimeters a minute from one end of the 20 meter pool to the other end. Place water injection/inlets on one end and suctions on opposite end . Imagining the pool as though as a 4.5 meter wide and 20 meter long pipe
I am betting that moving the water at this mild velocity will create a near perfect filtering opportunity based on my own assumption that unfiltered water now can't mix easily with filtered water like in our conventional pool. All I need to do is install 14 of 2 inch PVC pipes with no jetting adapter on one pool end wall and install 14 of 2 inch pipes as suction on the opposite pool wall , covered by some sort of protective mesh as wide as 4.5 meter by 1.5 meters so that people do not get sucked buy the pipes
Overflow system as I seen, even in endless pool, only get the top water moving but not the entire water column....correct ?
I am basing this pool "imagination" from a clean room scenario.
In a clean room, fresh air at low pressure is injected ( properly filtered ), by having higher pressure in the clean room, no way ambient airborne dust can enter the clean room. This to me is the moving of the water in the pool. For a clean room it is cheaper and more effective to inject clean fresh air this way than to filter out the entire clean room air if ambient airborne dust can find its way into the clean room.
On my dives, I seen water current bring dirty water or clean water to say a reef, but of course the current speed is approx 0.5 to 1 knot or 900ish to 1,856 meters per hour, not 20 meters per hour like I intended to create in the pool
Do you guys think what I am imagining here will result in a fast clarity recovery and at the same time 2x turnover a day will yield better than an 8 hour turnover 3 times a day ?