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Topic: Electricity and water (Read 2656 times)previous topic - next topic

loudg

Apr 23, 2014, 09:49 pm
Hello,
I need to recharge an object (30 cm height) electrically with the water flowing therethrough occasionally. 1 min = 15 litters of water. This object is connected at the smartphone with wifi. I thought of a micro hydro turbine. But I haven't found it yet. Does anyone have an idea?

Robin2

#1
Apr 23, 2014, 09:57 pm
If you have 15 litres of water per minute falling 30cm it should be easy to work out the energy available.

Figuring out how much could be converted to electricity is another matter entirely. 10% might be optimistic.

...R
Two or three hours spent thinking and reading documentation solves most programming problems.

dlloyd

#2
Apr 23, 2014, 10:00 pmLast Edit: Apr 23, 2014, 10:05 pm by dlloyd Reason: 1
This handles up to 20 L/min. (30 cm may not be enough drop).

MarkT

#3
Apr 23, 2014, 10:19 pm

This handles up to 20 L/min. (30 cm may not be enough drop).

Well it needs 0.4 bar (40kPa) which is a head of 4.1m of water.

I'm not really sure we're talking about charging electronics hydraulically, perhaps
the OP wants a pump?
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

raschemmel

#4
Apr 24, 2014, 03:02 am
That's what I'm thinking.
@OP,
does this:
Quote
I need to recharge an object (30 cm height) electrically with the water flowing therethrough occasionally.

MEAN:
FILL A CONTAINER USING AN ELECTRIC PUMP
?
Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,<br />DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter

loudg

#5
Apr 24, 2014, 10:11 am
To explain more precisely. This is a product frequently in contact with water. It can't move or be plugged into a grounded outlet. So it must be autonomous in terms of energy. It sends informations to my smartphone with WIFI (High energy so). When water passes through: 1 minute = 15 liters of water. I can't give an accurate data liters per day. It can be 5 liters or 100 liters, I don't know.
The product size : It's like a tube 30 cm long with a diameter of 4 cm.

So I thought to recharge it with a hydro turbine. I haven't other ideas.

For energy, my engineer said: We can do something with a turbine can give 500mW... with 5W, we should be quiet.

( Sorry for my English  )

MarkT

#6
Apr 24, 2014, 02:20 pm
Is the water under presssure or merely falling 30cm under gravity?
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

loudg

#7
Apr 24, 2014, 02:35 pm
I think there is a little pressure, like the pressure coming out on the shower

dlloyd

#8
Apr 24, 2014, 02:48 pm
To take a guess, something like this seems to meet your description of the device. Except with wifi and possibly data logging. Wouldn't solar panel and battery be feasible? A micro hydro turbine would be quite costly and difficult to install.

Robin2

#9
Apr 24, 2014, 03:13 pm
What about making an old-fashioned water-wheel that turns a small electric motor as a generator?

Another thought is to flow the water through a tube containing a model boat propeller connected to a small electric motor.

...R
Two or three hours spent thinking and reading documentation solves most programming problems.

raschemmel

#10
Apr 24, 2014, 04:24 pm
post a photo of the device and the connector you plan to use to charge it .
Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,<br />DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter

Robin2

#11
Apr 24, 2014, 06:24 pm

post a photo of the device and the connector you plan to use to charge it .

Seems a little premature since there is no sign of a generating machine yet

...R
Two or three hours spent thinking and reading documentation solves most programming problems.

raschemmel

#12
Apr 24, 2014, 07:53 pm
Quote
post a photo of the device and the connector you plan to use to charge it .

Quote
Seems a little premature since there is no sign of a generating machine yet

Quote
I need to recharge an object (30 cm height) electrically with the water flowing therethrough occasionally.

I phrased that wrong. I meant post a photo of the device to be charged, (not the charger). My bad.
Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,<br />DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter

MarkT

#13
Apr 25, 2014, 12:20 am

I think there is a little pressure, like the pressure coming out on the shower

Well the power available depends on the pressure so knowing what it is is key.
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

raschemmel

#14
Apr 25, 2014, 12:32 am
We need to know how the device to be charged is wired and if it has a poer cable coming out of the tank.
Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,<br />DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter

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