Relation Wave Energy Converter GIANT I. Table of Contents I. Table of Contents...1 II. 1. Wave resources...1 III. Working principle: Conversion wave power to electricity...2 IV. Absorption efficiency, Wave power and energy...2 V. Power generation cost, electricity generation cost...4 VI. Stong Points...........5 II. Wave resources In the map below there is the Power / linear meter around the world, a normal value, similar to Italy, I suppose, average wave power is less than 10 KW / meter, for example Scotland and Australia the average wave power is 50 to 80 KW / meter. It seems that 10 KW / meter is small compared to 50, but solar power is less than 150 W / square meter and the Energy in a day is about 1 KWh / square meter so for example the waves may be for more than 12 hours / day and with a real Electric Power = 1KW for every linear meter of wave in 12 hours I obtain 12 KWh of Electricity. In detail : 1
III. Working principle: Conversion wave power to electricity Technically for the generator we have developed and applied two solutions in function of the orientation of the magnetic flux so we have a linear alternator with the magnetic flux perpendicular and a similar standard generator with radial flux. The first solution, the linear alternator is very elegant but industrially it is complex and costly, it is for large size systems, the second is our development and expertise adapted to the standard components of the market and is very advantageous economically and industrially. The electric performance of the two solution are similar because the electric material is the same and also the equivalent size. The body ( Power ) of the buoy is connected to the Generator in vertical mode, the Energy is function of the cosine angle of the movement and the movement is vertically fixed. The strong point of the system is our generator, it works also with a minimum movement, with a very small wave it recharges the battery and if the speed increase the physics law says that a double speed means a power for four. The voltage output is connected to a rectifier section and after to a switching supply, in the system there are the electronic control and the back up battery, the small system is connected to the light, the big system is connected to the inverter and after to the Grid. For the construction the power systems is not the maximum attainable but a good compromise price / performance, the size for single module is easy to build to 5KW. It is very simple install the system, it is fixed and mounted in few hours so it begins to produce immediately just in time. Generators are a combination of standard material re worked, it is possible apply a large range of combinations so you could give us the value of the waves for your site of installation and we try to optimize. Obviously the technical details are reserved. IV. Absorption efficiency, Wave power and energy To check the formula please refer to : http://en.wikipedia.org/wiki/wave_power The performance for the two product Power and Lightning are different because the request of the customer are different; they are real example but it is simple give you other solution in function of your Power coefficient and values of the waves. To explain the first law is P (KW) = 0,5*T(sec)*H(m)*H(m), it says us the Wave Power for linear meter. The Power of the system is: P = F * Speed; F is the Force, the Force Slope is the Volume of the buoy, it is equal at the equivalent of the water, the heavy of the water ( Archimede ), the Force Descent is the heavy of the buoy with a Ventury effect in the water. The medium Speed = Height of the wave / (T/2); T is the Period Peak to Peak of the wave. NOTE: the real height is about 70% of the wave's height for the real movement of the buoy. The Energy that I could obtain is the integer in the time, the system works with the speed, the generator works slow but more speed more energy. The maximum performance is about 50 60 % of the wave energy transformed in electricity and we balance the system for the installation site. To evaluate the solution I suggest my system for Nominal Power about 3 KW for single module, this size is because the Coefficient Energy is 3 KWh /day for a family so in 1hour of wave you could supply a family but the size for single 2
module is easy to build to 5KW. It is simple write in the paper Megawatt and millions of Dollars and wave height over 5 meters in the middle of the sea, for the market and for the test to evaluate the solution it is simple install a real plant similar to a solar plant in a site, see Venice, and after if it works you could install more modules in battery to obtain a big Power. For Nominal Power it works with wave Height = 1 meter and Time about 5 seconds, it works with the speed of the waves in height so for example if the wave energy is sufficient it produce also with small wave, this situation is in the harbour with the waves create from the boat but if the speed of the waves are slow it is sufficient balance the size of the generator. In the table below an example for the Power availability in KW / metre of wave front and GIANT electric performance. The volume of the buoy must be balance, here we use a buoy large about 2 meter x 2 meter to use the energy of 2 metre flux wave. I select some situation, for the maximum possibility of installation ( many sites ) I write the selection with maximum 15KW / m. Wave Power KW / meter Height wave meter Time Second Power flux KW length = 1 meter Power flux KW length = 2 meters Power out KW from 0 to 5 0,5 5 0,625 1,25 756 from 0 to 5 0,6 5 0,9 1,8 1088 from 0 to 5 0,7 5 1,225 2,45 1481 from 0 to 5 0,8 5 1,6 3,2 1935 from 0 to 5 0,9 5 2,025 4,05 2449 from 0 to 5 1 5 2,5 5 3023 from 0 to 5 1,1 6 3,63 7,26 2540 from 0 to 5 1,2 6 4,32 8,64 3023 from 5 to 10 1,5 7 7,875 15,75 3470 from 5 to 10 1,5 8 9 18 2657 from 5 to 10 1,7 8 11,56 23,12 3413 from 10 to 15 1,8 8 12,96 25,92 3826 from 10 to 15 1,9 8 14,44 28,88 4263 OVER from 10 to 15 2 8 16 32 4723 OVER You could see that it produce with small wave and is more important the speed, for the situation OVER I could install instead of 3 KW a model of 5 KW. For the Solution Lighting the sample could provide 50 W, it works with some centimeter of height wave, the condition are the same, the wave are created from the boat and from the wind, they are with small period but short in height. It could give also 150W if the waves are good and we balance the system for the installation site. Height Wave meter Period wave second Power plant WATT 0,05 2 6 0,1 2 24 0,15 3 27 0,2 3 43 0,25 3 67 0,3 3 97 0,35 3,5 99 0,4 3,5 127 0,5 4 152 3
V. Power generation cost, electricity generation cost To check the formula please refer to : http://en.wikipedia.org/wiki/cost_of_electricity_by_source The GIANT is built in a chassis in inox steel, the system is composed from the mechanical and movement section, the generator, the rectifier section, the switching supply section, the battery section, the light section and for the Power version the inverter section. For the evaluation the cost is balanced in 15 years of life of the plant For Power version there is a generator with Power = 3KW the cost is about 15000 Euro it is not build in series. Here the 15000 Euro is the cost to build the system not the price to sell, the cost of the components is for small number of pieces. If you need a big Power it is sufficient the connection in series of many modules. Actually Wave Energy Converters are very expensive in relation to the performance and they have a high environmental impact and a little flexibility, the existing plants that use the waves have Nominal Powers about 1 Mega Watt and cost over 1 Million of Euro and they need ocean waves to produce electricity. In the table below there is an example of a plant, the power is 3 KW, at nominal Power I write the Production of Energy for year in function of the hours /day of wave and the related economical coefficient. Nominal Power 3KW Industrial Cost Euro 15000 Cost Euro /W 5 it is equal Cost / Power Production KWh / Year for 8h / Day wave 8760 it is equal Production Kwh* 8 hour*365 day Production KWh / Year for 12h / Day wave 13140 Production KWh / Year for 16h / Day wave 17520 Production KWh / Year for 20h / Day wave 21900 Cost Euro / KWh for 8 h / day in 15 year 0,114 it is equal Cost/ (15 * Year Production Kwh) Cost Euro / KWh for 12 h / day in 15 year 0,076 Cost Euro / KWh for 16 h / day in 15 year 0,057 Cost Euro / KWh for 20 h / day in 15 year 0,034 Italian Price Wave Energy = 0,34 Euro /KWh Amortization Year for 8h / Day wave 5,03 it is equal Cost/ ( 0,34 Euro * Year Production Kwh) Amortization Year for 12h / Day wave 3,35 Amortization Year for 16h / Day wave 2,51 Amortization Yea for 20h / Day wave 2,01 In Italy the price of wave energy is 0.34 Euro / KWh so in function of the Production you obtain the break even. For Light version there is a generator with Power = 50W and It could give also 150W if the waves are good, actually the cost is about 3000 Euro, it is not build in series. NOTE: At the end of the year after the field test we ll patent the new mechanical version, it is more flexibility, it recovery the stroke of the Tidal ( in Venice also more than 1 meter ) and it always works also with small wave. 4
VI. STRONG POINT In detail the strong point are: The Target: Industrial cost may be 10 /15000 Euro, the Nominal Power is about 3 KW, if you need a big Power it is sufficient the connection in series of many modules. The site of installation / the Market : It works with small wave so it could be installed in the coast, in the harbour ( also in the off shore platform for example like support your Wind Plant off shore ). The cost of connecting to the Grid: It is installed in the coast so it does not need long and expensive wiring in High Voltage for the transmission and connection of the electricity. All set features are indicative. The company reserved the right to have them changed totally or partially without notice. All rights reserved. Rev_2014_3 GA Gs Gt 5