1

Piezoelectric GeneratorTeam Akamon

Yuki Yamagishi Huijun Park Hongmei Liu Shen Jiang (Andy)

2

2011 Tōhoku earthquake and tsunami

What made it so difficult to save lives?Electricity supply stopped, then…

> Medical equipments stopped　　　　　⇒ couldn’t treat the patients…

> Traffic lights didn’t work.　　　　　⇒ traffic accidents took people’s lives

> Even if someone may be still alive, we were not able to know their locations

3

So many power plants, then why!?

Why couldn’t we transport electricity to those area?• Thermal Power Generation(61.7%)• Hydro Power Generation(8.1%)• Nuclear Power Generation(29.2%)

4

etc...

5

Localized Power Generation

If the power plants are separated

OR⇒

Then even one is attacked, no damage for others.

6

Methods:Solar energy

7

Low head hydro power

Kankakee Low-Head Hydropower Facility in Illinois (1.2 megawatts installed capacity)Source: National Renewable Energy Laboratory(NREL)

8

Wind power

But what we are going to focus on is ...

9

Piezoelectric generator

10

Power-generating Floor (PGF)

11

The theory of power generating floor

When pressured

Pressured

ion arrangement changes Electric

energy

-----Piezoelectric effect

*Picture on the right is from "Piezoelectricity",Wikipedia

12

Application of the piezoelectric effect

touchpad

gyroscope

speaker

clock

igniting

printer

13

condenser Supply energy

14

What're the merits?

• No fossil fuels required

• No waste

• No contamination

• Low cost

• No restraint of location

15

Our project is…..

16

How much energy can we get from this project?

If we introduce “energy generating floor” into expresswaysof Tokyo Metropolis …

Energy production per day = (2000/60) * (18000/0.25) * 1100000

=2.6*1012(J/day)=720,000kWh

1(J) of energy is produced when 60kg person makes a 0.25m pace.

On expressways of Tokyo Metropolis1,100,000 of 2,000kg vehicles run 18km per day on average.

17

Data:

•Total length: 322.5km •Average daily traffic: 1,100,000 cars per day•Average driving distance: 18 km per vehicle•Average vehicle weight: 1345kg ( considering people and freight that vehicles carry, at least 2000kg should be used in these rough calculations)•Electricity output by PGF: 1Ws (60kg person steps on the floor in 1 second)•Size of one PGF: 30cm×60cm •Daily average electricity consumption per household in Tokyo: 10kWh•Amount of households in 23 districts of Tokyo: 4,322,539 (2010)

So we can provide 1.5% electricity consumption merely by PGF under the expressways of Tokyo Metropolis.

Data sources: pp.103-105, 12/15/2008, Nikkei Electrocis; 4/27/2011, Nikkei News; "Shuto Expressway", Wikipedia; Maebara Seiji, Minister of Land, Infrastructure, Transport and Tourism, during Q&A of publication of new expressway fare system; Annual report by Metropolitan expressway Co,. Ltd.

18

What is more...

"The efficiency of PGF has been increased by 30 times during the last 6 years (2005-2010). And it still has the capacity to increase at least 10 times."

"The electricity produced by PGF underneath the expressways of Tokyo Metropolis will accound for 40% of the electricity consumption by households in 23 districts of Tokyo."

---according to President Hayami of Soundpower Corporation

19

How can we use piezoelectric generation during the emergency ---like earthquake?

•Hospitals: large enough to supply electricity consumption of medical equipment, when only electricity is cut off during the emergency.

•Traffic signals: still will work depending on the PEGF, because where there is a road, there is electricity (our motto ^^)

•"Emergency Positioning System(EPS)":

wired positioning system of PGF :

wireless signal sending system:

So, if you are out of iPhone's power, and looking forward to rescue corps, just find an intact road and jump!!!

20

Constraint

•Cost

•Maintenance

•Efficiency

•Durability

•Stability

21

In a nutshell

power generation dispersion= risk dispersion

Save lives

Where there is a road,

there is electricity.

22

Thanks for listening