motorwave ® desalinized water from renewable wave energy
TRANSCRIPT
MOTORWAVE®
DESALINIZED WATER
FROM RENEWABLE WAVE ENERGY
MOTORWAVE®
A unique technology that has been created and developed in Hong Kong to tap the power of
wave motion in order to make:
Electricity
Desalinized Water
Hydrogen
Anywhere there are waves…there is power
Desalinized Water
• Main cost of making fresh water from desalination is the cost of electricity and the membranes used.
• Desal treatment requires high pressure to push salt water through membranes to separate the salt from the water.
Desalinized Water
• With the use of the Motorwave, the mechanical energy that is created can be used in place of electricity to create high pressure needed for the process.
• Savings of 95% on electricity for the desalination process can be obtained with the Motorwave.
• Fresh water can be created at offshore wave farms and transported to locations where there is little wave activity, but a need for fresh water.
Power Needed for Desal
• It takes approximately 3 kWh to produce one (1) cubic meter of fresh water by using reverse osmosis.
• 10.8M joules/cubic meter are needed (due to inherent 50% level of efficiency of electric pumps)
Using Motorwave for Reverse Osmosis
• By using wave energy with Motorwave, we can directly transform mechanical energy of the waves into high pressure
• This gives the pressure needed for the salt water to pass through the membranes, resulting in a very high efficiency transformation rate.
• One (1) Motorwave generates 1 M joule with waves of two (2) meters in height, and can therefore process approx 500 cubic meter of fresh water per hour.
Using Motorwave for Reverse Osmosis
• If electricity were to be used for the same quantity of water produced, more than 1 500 kWh would be needed per hour. That equates to 13,140 MW needed per year in order to create 4.3 million cubic meters of water.
• And will generate approx 6,500 tons of CO2• It is estimated production of one (1) cubic meter of
water with a Motorwave machine and reverse osmosis equipment will cost less than HK$1 per cubic meter.
Using Motorwave for Reverse Osmosis
• 24 Motorwaves can be installed per square kilometer.
• A farm of Motorwaves can therefore process approximately 105 million cubic meter of fresh water per square kilometer.
• This is equivalent to over 24,330 acre/ft per year, or over 21MGD ??.
Power of the Waves
• Each wave has 2 energy levels a) potential energy P= Mg H
b) kinetic energy P=1/2 MV2
• Energy levels can be from 20 to 100 kW / meter
• There are approximately 2 gigawatts of energy per every square km of sea
GENERAL PRINCIPLES
There are 3 basic principles utilised by the Motorwave®:
1. Archimedes LawThe Force is equal to the volume of water displaced.
2. Newton’s Laws of GravityAny object is subject to the Earth’s gravity and tends to fall.
3. Energy ConservationEnergy is never created or lost, it is only transformed.
THE HARDWARE
Desalinized Water with Motorwave
• Motorwave opens a new, cost effective, low energy option for desalinized water – one that can even bring the generation of carbon credits by eliminating the use of fossil fuel derived energy.
• Motorwave can work most efficiently in areas with average wave height of 2m or greater.
