A New Devide Generates Electricity From Human Breath

US scientists have made a device that converts air flow from human breath into electricity. The device could serve as a power source for implantable biomedical devices, removing the need for systems with batteries that need replacing in the operating theatre.

 ‘We’ve been working on harvesting nano- and micro-scale mechanical energy from human activities for several years, for powering bioimplantable devices and even personal electronics,’ explains Xudong Wang, who led the research at the University of Wisconsin-Madison.

Respiration could be an important energy source from the human body, but the air flow rate is low (typically 2m/s) and it fluctuates. Scientists have been able to harvest energy from low speed air flow devices at the centimetre scale and above. But previous devices, such as windmills and inductive wind belts, need wind speeds of over 2m/s to operate. So, a much smaller device is needed to harvest energy from respiration. It also needs to be flexible enough to be placed in the body and tough enough to avoid fatigue failure during long-term use.

To achieve these goals, Xudong’s team designed a micrometre-sized polyvinylidene fluoride (PVDF) belt to harvest the energy. They found that to work under a low speed air flow, the PVDF belt needed to be thin enough to be driven into a resonant oscillation (a deformation that generates an electric current). The major challenge, says Wang, was maintaining the strength of the PVDF while getting it to the correct thickness. To overcome this challenge, the team used an ion etching technique to reduce the belt’s thickness. 

‘Preparing thin PVDF films to harvest energy from weak respiration is an important technology,’ says  Masao Kaneko, an expert in functional polymers for energy conversion at The Institute of Biophotochemonics, Japan. ‘The team should now attempt to drive a real device by the energy accumulated from respiration.’   

Wang says his next step is to improve the energy harvesting efficiency and explore more designs for harvesting other types of mechanical energy from the environment or biological systems.  

by "environment clean generations"

20 simple ways to lower your electricity bills

These days almost majority of the people pays higher electricity bills for their home. But if some simple steps are initiated then the bills can be lowered a lot and one can save enough money.

There are some easy and simple steps to save the electric bills as well as the money. People try to follow the complex ways of saving money and at the end they get upset. There is no need to follow the complex rules when their easier ways to save the money and different forms of energy.

The 20 easy ways to save the electricity bills and they are as follows:

1. Dry hair naturally instead of using hair dryer.
2. Dryer’s Wrinkle Shield Feature should be avoided.
3. use of CFL lamps
4. Before finishing the Dryer should be checked.
5. The use of Christmas lights only at the nights.
6. Pool Pump strainer Baskets should be cleaned.
7. Coils of the refrigerator should be cleaned.
8. The coils of the refrigerators should be cleaned periodically.
9. Keeping the computer in the standby mode.
10. Before keeping the hot food in the refrigerator, it should be cooled.
11. The bulb of the Microwave should be disconnected.
12. The heat drying of the dishwasher should be kept off.
13. The laundry should be loaded consecutively.
14. The computer should be turned off when not in use.
15. Once in a week the lights should be turned off.
16. The electrical appliances that are bought should always contain the BEE stars.
17. the dishwasher loads should be done full
18. the laundry loads should be done full
19. the leaves should be raked by hand instead of leaf blower
20. Instead of dishwasher, the dishes should be washed by hands.

These are very easy and simple ways to follow to lower the electricity bills and save money. Once it is done for few days, then one can opt for the other methods of saving the electricity bills and as well as the money.

 by "environment clean generations"