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EXAMPLE 2: DEVELOPMENT OF PIEZOELECTRIC WATER PIPES PROTOTYPE

 
     
 

PIEZOELECTRIC PIPE:

 
     
 

Example5

 

 

- Internal channeling of water circulation.

 

- External encapsulation of the pipe where the piezoelectric generators are included.

 

- Bearings for the internal channel to rotate with respect to the external part.

 

- Fins in internal channel to rotate, as a consequence of water flow.

 

- Mechanical elements for performing micro pulsations in piezoelectric elements.

 
 

 

 

 
 

PIEZOELECTRIC MODULE:

 

PZT piezoelectric element with dimensions 1,5 mm x  1,5 mm x 10 mm

g33 = 0,035 Vm/N Applying a force of F= 0,2 N = 0,02 Kg

 

  - Vout = 0,035 x 0,01 x ( 0,2 / (0,0015 x 0,0015 )) = 31,11 V

 

After AC/DC converter each piezoelectric module Mji,i  has Vout = 30 V

The speed at which the triggering force F is applied on all the piezoelectric modules Mji,i is set by the activation plate is regulated to give an output current Iout = 1,5 mA

Example6  
     
 

PIEZOELECTRIC GENERATOR:

 

Space between piezoelectric modules = 1,5 mm

Element + space = L + space = 1,5 + 1 = 2,5 mm = 0,0025 m

 

Number of piezoelectric elements = 2,5 m / 0,0025 m = 1.000

 

Matrix Generator = 1 row x 1,000 columns, then:

 

  - Iout = 1.000 piezoelectric x 1,5 mA = 1.000 piezoelectric x 0,0015 A = 1,5 A

  - Vout = 30 V

  - Pout = 1,5 A x 30 V = 45 W

 

Considering an efficiency = 85 %. Pout = 38,25 W

Example7  
 

 

 

 
 

CONCLUSIONS:

 

- Internal perimeter = 2 x p x 100 mm  = 628,32 mm

- Generator width = piezoelectric + capsulate = 1,5 mm + 2 mm = 3,5 mm

- Number of piezoelectric generators = 628,32 mm / 3,5 mm = 179 piezoelectric generators

 

- Lost space = 25 %

 

- Number of piezoelectric generators = 251 x 0,75 = 134

- Pipe Total Pout = 134 generators x 38,25 W = 5.125,5 W in a Pipe 2,5 m

- Considering a circuit of 20 pipes, this means, 20 x 5.125,5 W = 102.510 W = 102,5 KW in 20 x 25 m = 50 m.

 

This means that, with this piezoelectric pipes, we can generate in 1 Km a total of 2.050,200 W --> 2 MW.

Example8