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tlfong01
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Cat Home DIY Q&A - Musical Fountain How To

Mon Jan 21, 2019 6:24 am

...
Introduction

I am building a rooftop garden on our building. I am thinking of setting up a mini musical fountain there. My budget is 200 yuan. This is a side project of my smart cat home project. So far I have learnt the basics of Raspberry Pi, ESP8266, relay, servo, solenoid, solenoid valve. Next to mess around are:

(1) water pump,

(2) smart LED lighting and music.


Now I am measuring the mains water head in my home. Water is gravity fed from the rooftop 4 stories high (about 16 meter). So with some friction loss, the water head should be at least 3 stories (12 meters) high, enough for a great musical fountain.
However, when I fully opened the 1/2 inch tap, water coming out only shot to 30cm high, not even 3 meters, not to mention 3 stories! :(

What is wrong? Perhaps the Bournille Equation does not apply in my flat?


Home water head measurement
(youtube) https://youtu.be/2DLICtVj3XQ

Fontana - The MGM National Harbor Fountain
https://www.youtube.com/watch?v=EdBX0480uhA

Sydney Darling Harbour Water Light Show
https://www.youtube.com/watch?v=7NUidDKyN40

Water feature - Wikipedia
https://en.wikipedia.org/wiki/Water_feature

In landscape architecture and garden design, a water feature is one or more items from a range of fountains, pools, ponds, cascades, waterfalls, and streams. Before the 18th century they were usually powered by gravity, though the famous Hanging Gardens of Babylon are described by Strabo as supplied by an Archimedean screw. Other examples were supplied with water using hydraulic rams.

Ancient water features were powered using gravitational forces, man power or animals to pump in the water. Since the 18th century, the majority of water features have been powered by pumps. In the past, the power source was sometimes a steam engine, but in modern features it is almost always powered by electricity. There is an increasing range of innovative designs as the market becomes more established and people become more aware of alternate installation methods, such as solar power. The advantages of using solar power include environmental benefits, no electrical lines in the garden, and free energy.

Modern water features are typically self-contained, meaning that they do not require water to be plumbed in; rather water is recycled from either a pond or a hidden reservoir, also known as a sump. The sump can either be contained within the water feature, or buried underground .

A water feature may be indoor or outdoor and can be any size, from a desk top water fountain to a large indoor waterfall that covers an entire wall in a large commercial building, and can be made from any number of materials, including stone, stainless steel, resin, iron and glass. Most water features are electronically controlled, ranging from simple timer actuators to sophisticated computerized controls for synchronizing music to water and light animation.

Water features often offer additional benefits to homeowners, such as increased curb appeal, home value, reduced noise pollution (due to the sound of water overpowering outside noise), increased humidity in dry regions and improved air quality.


Three Coins in a Fountain - Frank Sinatra 155,415 views
https://www.youtube.com/watch?v=rkHkMH5uxrA


Update 2019jan22hkt1014

Plumber Work Posts to Refresh Memory
https://www.raspberrypi.org/forums/view ... 6#p1382439
https://www.raspberrypi.org/forums/view ... 6#p1384736
https://www.raspberrypi.org/forums/view ... 0#p1384968
https://www.raspberrypi.org/forums/view ... 0#p1389079
...
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Last edited by tlfong01 on Tue Jan 22, 2019 3:22 am, edited 2 times in total.
I am an electronics and smart home hobbyist.

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tlfong01
Posts: 1312
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Location: Hong Kong

Re: Cat Home DIY Q&A - Musical Fountain How To

Mon Jan 21, 2019 8:38 am

tlfong01 wrote:
Mon Jan 21, 2019 6:24 am
Now I am measuring the mains water head in my home. Water is gravity fed from the rooftop 4 stories high (about 16 meter). So with some friction loss, the water head should be at least 3 stories (12 meters) high, enough for a great musical fountain.
However, when I fully opened the 1/2 inch tap, water coming out only shot to 30cm high, not even 3 meters, not to mention 3 stories! :(
What is wrong? Perhaps the Bournille Equation does not apply in my flat?

6.6mm Diameter Pipe Water Head > 3 meters

I then used an adpat水er to change the 1/2" dimeter to 6.5mm. This time water shot strongly to the ceiling 3 meters high, even I only turned the tap about 3/4 open.

This is very good news to me, because I don't need to use a pump to increase the pressure, gravity fed is enough for the experiments at home. Only whe

/... to continue, ...
...
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Location: Hong Kong

Re: Cat Home DIY Q&A - Musical Fountain How To

Mon Jan 21, 2019 2:09 pm

tlfong01 wrote:
Mon Jan 21, 2019 8:38 am

Quad Stream Water Feature Assembly Notes

Now I am playing with 1/4" 6.5mm PE pipe toys. I found them as fun as Lego. One good thing is that they are dirt cheap. Another good thing is that the "Quick Connect" method is dirt easy - no tools are needed, you just cut the tube, insert the tube to the toy, pull, and the job is done!


1/4" 6mm PE Pipe Accessories

AliExpress 1/4 inch 4 Pcs Total Length 5 Meter food grade water tube PE Pipe water pipe water filter pipe - US$5
https://www.aliexpress.com/item/Free-Sh ... 2ca75bddfd

AliEXpress 6pcs/lot Equal Straight 1/4" -1/4" OD Tube PE Pipe Fitting Hose Quick Connect Ball Valve for RO Reverse Osmosis Aquarium System - $12
https://www.aliexpress.com/item/6pcs-lo ... ca75bddfd

AliExpress 1pcs PY/ PE/ PU-4/6/8/10/12/14/16 Plastic Push-through Pneumatic Components fitting Tub pipe Fast joint connect T/Y Type - $1 - 2
https://www.aliexpress.com/item/1pcs-PY ... ace0887877

...
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Location: Hong Kong

Re: Cat Home DIY Q&A - Musical Fountain How To

Tue Jan 22, 2019 3:03 am

tlfong01 wrote:
Mon Jan 21, 2019 2:09 pm
Quad Stream Water Feature Assembly Notes
Now I am playing with 1/4" 6.5mm PE pipe toys. I found them as fun as Lego (just imagining, because I never played Lego)! One good thing is that they are dirt cheap. Another good thing is that the "Quick Connect" method is dirt easy - no tools are needed, you just cut the tube, insert the tube to the toy, pull, and the job is done![/i][/color]
[/i][/color]
...

Quad Stream Water Feature Test - A Total Failure!

So I connected the elegantly designed quad stream water feature masterpiece to a home water mains 1/2" pipe, and expected to see 4 spectacluarly looking strong water jets shooting high to the ceiling. However, I disappointingly only found 4 dribbling water streams!

I again tested the old 1/2 in to 1/4 inch adapter and still found a strong water jet. I guess the adapter thing has a smaller orifice than I thought. I need to check this out.

...
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I am an electronics and smart home hobbyist.

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tlfong01
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Re: Cat Home DIY Q&A - Musical Fountain How To

Tue Jan 22, 2019 6:34 am

tlfong01 wrote:
Tue Jan 22, 2019 3:03 am
Quad Stream Water Feature Test - A Total Failure!
So I connected the elegantly designed quad stream water feature masterpiece to a home water mains 1/2" pipe, and expected to see 4 spectacluar looking strong water jets shooting high to the ceiling. However, I disappointingly only found 4 dribbling water streams!
I again tested the old 1/2 in to 1/4 inch adapter and still found a strong water jet. I guess the adapter thing has a smaller orifice than I thought. I need to check this out.

1/4 inch PE 6.5mm Pipe Dimensions

I found the 1/2 inch to 1/4 inch adapter has an orifice of only 3mm, no wonder velocity is much higher from the 1/2inch. I guess if I use the tube with 4.5mm diameter, the velocity will also high, at least no drippling out.

...
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tlfong01
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Re: Cat Home DIY Q&A - Musical Fountain How To

Tue Jan 22, 2019 6:42 am

tlfong01 wrote:
Tue Jan 22, 2019 6:34 am
1/4 inch PE 6.5mm Pipe Dimensions
I found the 1/2 inch to 1/4 inch adapter has an orifice of only 3mm, no wonder velocity is much higher from the 1/2inch. I guess if I use the tube with 4.5mm diameter, the velocity will also high, at least no drippling out.

6.5mm, 4.5mm, 3.0mm diameter pipe water head measurement results

I found that pipes with the following diameters 6.5mm, 4.5mm, and 3.0mm have the corresponding water heads 10mm, 20mm, 50mm.

It appears that the 1/4 inch, 6.5mm pipe has a very high friction, so the water head of orifice 3.0mm diameter drops from > 3m to only 50mm. Need to confirm later.

...
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Re: Cat Home DIY Q&A - Musical Fountain How To

Tue Jan 22, 2019 7:16 am

tlfong01 wrote:
Tue Jan 22, 2019 6:42 am
It appears that the 1/4 inch, 6.5mm pipe has a very high friction, so the water head of orifice 3.0mm diameter drops from > 3m to only 50mm. Need to confirm later.

Water Head Right at the 1/2" to 1/4" Adpater Outlet Port

I found the following results:

6.5mm diameter = 10mm head,
4.5mm diameter = 40mm head


I have been too lazy to study the Bernulli equation with the scary Greek alphabets. I guess the guy seems to say velocity is inversely proportional to the area of the orifice. And I guess higher velocity means higher water head (but not sure if linear or squarely proportional. I did one trial and error but did not find any clue.

10 / 6.5 = 1.54
10 / (6.5^2) = 0.24

40 / 4.5 = 8.8
40 / (4.5^2) = 1.2


I forgot the algebra I learnt in middle school. I vague remember the teacher says something like:

1x/y2 = x2/y2

And that X = kY is linear, and quadratic equation with a square root thing is non linear. Anyway it is too hard. I gave up.

But I do remember Sam Cooke saying that even you don't know what is algebra, it is a still wonderful world, ... :mrgreen:

Sam Cooke - What A Wonderful World - 9,127,153 views, 2,685 Comments
https://www.youtube.com/watch?v=R4GLAKEjU4w
I am an electronics and smart home hobbyist.

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Re: Cat Home DIY Q&A - Musical Fountain How To

Tue Jan 22, 2019 1:13 pm

tlfong01 wrote:
Tue Jan 22, 2019 7:16 am
It appears that the 1/4 inch, 6.5mm pipe has a very high friction, so the water head of orifice 3.0mm diameter drops from > 3m to only 50mm. Need to confirm later.
Water Head Right at the 1/2" to 1/4" Adpater Outlet Port
I found the following results:
6.5mm diameter = 10mm head,
4.5mm diameter = 40mm head

Rooftop Smart Garden Water Control Centre Board V0.1
...
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Re: Cat Home DIY Q&A - Musical Fountain How To

Tue Jan 22, 2019 1:55 pm

tlfong01 wrote:
Tue Jan 22, 2019 1:13 pm

What is increasing pressure pressure booster pump?

The spec of the water pump says it is for circulation and NOT for increasing pressure. I did not understand what does it mean. But after getting around my problem of starting the pump, I vaguely appreciate its meaning. Even I don't know what is increasing pressure, I can now use the pump to shoot 1/2" diameter water stream over 1 meter. :) Of course I need to google again, ...

Update 2019jan22hkt2207

I had a quick google just now and got a better idea of the increasing pressure thing. Actually the "increasing pressure" pump is called "pressure booster pump". I collected the following articles and should read them first before further messing with my circulation pump which is specified to be NON BOOSTER PUMP. But I guess I won't fry the pump even it is not designed for that, ... :mrgreen:

How to Increase Water Pressure in Your House [by using a water pressure booster pump]
https://www.familyhandyman.com/plumbing ... /view-all/

How to Get More Pressure Out of Well Water
https://homeguides.sfgate.com/pressure- ... 36511.html

Lesson One - What is a Centrifugal Pump?
http://www.pricepump.com/pumpschool/psles.html

Booster pump - Wikipedia
https://en.wikipedia.org/wiki/Booster_pump

Update 2019jan22hkt2250

I found the following one hour pump university very good. So I made some summary notes.

One Hour Centrifugal Pump University
http://www.pricepump.com/pumpschool/Col ... ts.htm

Impeller, increase velocity at outer rim [not propeller creating pressure, pushing liquid, ...]

Head - imagine a pipe shooting a jet of water straight up into the air, the height the water goes up would be the head

Duty Point
The point on the curve where the flow and head match the application's requirement is known as the duty point. It is important to understand that a centrifugal pump is not limited to a single flow at a given speed. Its flow depends on the amount of resistance it encounters in the pipeline. To control the flow of a centrifugal pump it is normally necessary to restrict the discharge pipeline, usually with a valve, and thus set the flow at the desired rate. Note: Generally speaking, do not restrict a pump's flow by putting a valve on the suction line. This can cause damage to the pump!

End of Curve Horsepower
When sizing a motor driver to fit an application it is necessary to consider whether the pump will ever be required to operate at a flow higher than the duty point. The motor will need to be sized accordingly.

Suction line ...

Cavitation ...

...
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Re: Cat Home DIY Q&A - Musical Fountain How To

Wed Jan 23, 2019 7:47 am

tlfong01 wrote:
Tue Jan 22, 2019 1:55 pm
The spec of the water pump says it is for circulation and NOT for increasing pressure.
But I guess I won't fry the pump even it is not designed for that, ... :mrgreen:

Non pressure boosting water pump

I read the spec again and found that the ad is a bit misleading. It says for circulation and pressure booster. But the detailed spec says 12V 3M version is not for pressure boosting. No such note for 24V 6M model. Does it mean 3M model is not for boosting, but 6M is?

Nanking Gospel Electronics WS122 Water Pump
https://item.taobao.com/item.htm?_u=f3t ... 6993226670

Application
For medical and drinking fountain, hot water circulation and booster BLDC low noise suction pump - 12V 3M ¥80, 24V 6M ¥85

Spec (Translation version 0.1 tlfong01 2019jan23hk51543)
12V V3 3M (not suitable for pressure boosting, suitable for circulation)
DC12V, 700mA max, 8L/min, head 3M

24V V6 6M
DC24V, 800mA max, 12L/min, head 6M


Working Life
1. 4.5 years - 100 degree C boiling water 24x7 non stop operation
2. 22 years - daily run 5 hours
3. 10 hours no water run 10 hours without damage (conventional pumps dry run 1 hour would be damaged).

Structure
Using electronic polarity changing, no carbon contact, high ? creamic shaft and shaft sleeve, one body magnet prevents ?, separate rotator and stator, epoxy filled, high precision, good shock absorption, 100% water proof, permanent magnet, low noise, small size, stable performance, wide operatiing voltage range

Advantage
logn life, low noise (< 35dB, low power models < 30dB), suitable for hot water circulation.
Last edited by tlfong01 on Fri Jan 25, 2019 12:57 am, edited 1 time in total.
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Re: Cat Home DIY Q&A - Musical Fountain How To

Thu Jan 24, 2019 4:05 am

tlfong01 wrote:
Wed Jan 23, 2019 7:47 am
The spec of the water pump says it is for circulation and NOT for increasing pressure.


DIY Circulation Pump / LED light Ideas

I am watching youtubes on how to make DIY water pumps, LED lights for water fountains. I found many ideas I can borrow from.

How to Make an Electric Tabletop Water Fountain with LED Light 59,672 views
https://www.youtube.com/watch?v=f8gI6Fvd_ig

DIY Tabletop Led Vortex Water Fountain 104,058 views
https://www.youtube.com/watch?v=fbZMUYOWJs4

Setting up a Waterfall, Water Feature, Pool, and Fountain LED Light Kit 2,682 views
https://www.youtube.com/watch?v=a2yFaDf43cA

DIY Water Feature Spillway Blade and LED Light Bar 57,872 views
https://www.youtube.com/watch?v=8XEezYcto0o

LED light ring for fountains and water features 30,150 views
https://www.youtube.com/watch?v=8hhYB7XrE_k
...
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