창의설계융합공학 Creative Design Convergence Engineering Presentation Title

Integrated life straw with Nicolas Tesla One-Way-Valve

• Heo Sung Ku
• Shahzeb Tariq
• Juin Yau Lim
• Amirsaman Tayerani

Country with low safely accessible drinking water

Effective, portable water purification system

Filter up to 0.2 microns (99.9999% bacteria)

Inner purifier made of BPA-free plastics

https://www.twobirdsbreakingfree.com/best-water-purifiers-for-travel

https://www.lifestraw.com/

• Works entirely mechanical without any chemical dosage, moving parts, or batteries.
• Water passed through two polyester textile pre-filters with the mesh sizes 100 and 15 microns.
• Bacteria (i.e., E-coli, campylobacter) and protozoa (i.e., giardia lamblia, cryptosporidium parvum).
• Flow rate of 1.7 L/min.
• Approximately 4,000 litres before expiry.

https://www.lifestraw.com/

• Continuous pressure applied on the device, else the water will backflow to the input nozzle.
• Filtered water will be wasted
• Considerably cost required for the device

2

Suggestions to overcome:

• Integrating Tesla one-way-valve to the purification device.
• Manufacturing the device with 3D printing machine.

• It has no moving parts to break or wear out.
• It doesn't actually prevent reverse flow. (washing mode)
• It is relatively simple and compact.

• It is probably harder to construct .
• It is far less robust and predictable than a simple valve.

forward

A. Lifestraw demonstration:

B. Intersections of lifestraw:

C. Nicolas Tesla one-way-valve (physical phenomenon):

D. Solidwork with Nicolas Tesla one-way-valve:

E. Physics behind Nicolas Tesla one-way-valve:

THANK YOU!