Presentation Description: Current land based utility scale towers average about 85 meter hub height and nacelles average about 2.5 MW. Why is taller and larger important? ENRL-Truewind published tables show that PA + OH have less than 1 GW potential at 80 meters but over 220 GW above 140 meter hub height. The 12 southeastern states have about 8 GW at 80 meters but over 1,635 GW above 140 meters. Enough for all of the Eastern USA at far less cost than offshore wind.
The standard tapered monopole has reached the maximum component size that can ship from fabrication facilities to wind farm locations. There are a dozen alternate tower configurations that can ship within transportation constraints but they are seldom used. Why? Installation of the larger nacelles at greater heights is still defaulted to the use of very large, heavy and expensive crawler cranes. There are a half dozen OEMs' that make 10+ MW nacelles for offshore. There are only a few cranes in the world that can lift these nacelles to 150 meters and they are not practical for use in rural environments.
My patented (10,669,994) tower uses components that can be made in current fabrication facilities with current tools, equipment, craft labor, and shipped on current carriers to rural locations. A crane of about 20% current cost can be used to erect the tower to 150 meters or higher. The unique lift / work deck can be used to elevate the 10 MW or even 20 MW future nacelle to the final design elevation. It uses rack & pinion equipment that has been used for decades in the offshore oil and wind industry to lift thousands of tons of work decks.
The simple multi-column design of the tower allows that these same components can be standardized and used for nacelles from 10 MW through 25+ MW with simple increases in column spacing and add-on reinforcement.
Upon completion, participants will understand that multi-column towers can provide the equivalent structural support capacity of all other alternative tower designs but offer the advantage of component transport by current methods and within current constraints while being manufactured in current facilities reducing capitol costs to transform this industry.
Upon completion, participants will understand the technical reasons why lifting the heavy nacelle weigh inside the multi-column layout can use lift equipment that is significantly smaller, lighter, and cheaper than the massive crawler cranes that would be required for future larger and more powerful nacelles by using standard equipment from jack-up barges that have been used successfully for decades.
Upon completion, participants will understand how the multi-column design can be standardized into shippable component sizes and by varying column spacing and attachable reinforcement, they will accommodate current 10 MW nacelles and also future 20+ MW nacelles.