Mass Megawatts Wind Power, Inc. wind=energy

The MAT design enables power output to be achieved at a much lower wind speed, providing a more consistenet power output to the utility grid.

FAQ's

At what wind speeds will MAT produce energy?
What if wind doesn't reach 14 mph?
What is MAT's electrical design concept?
What happens if one of the blades is damaged?
What are the maintenance costs?
How much land will each MAT require?
MAT has many more moving parts than the giant propeller-type turbines. Is this better?
Does MAT's design increase construction and maintenance costs?

Q:	At what wind speeds will MAT produce energy?
A:	Output is based on an average annual wind speed of 19 mph at 80 feet above the ground. Thermostatically controlled brakes are applied when the wind reaches 45 mph with a resultant drop in power. Beyond that wind speed, wear exceeds the value of the electricity produced. However, MAT can withstand 120 mph winds before destructive forces could be incurred. (Further testing will be required for reasonable long life assurances.) back to questions
Q:	What if wind doesn't reach 14 mph?
A:	MAT actually incorporates two generators per shaft for a total of 32 generators. The smaller generator is rated at 7.5 kw and cuts in with winds at 10 mph and cuts out at 14 mph. At that point, the larger generator, rated at 22.5 kw, cuts in since it is operates more efficiently given the increased output of the turbine at higher wind speeds. The production units will likely use variable speed electronics. back to questions
Q:	What is MAT's electrical design concept?
A:	MAT's generators are standard induction motors just like the ones on your washing machine. We will use 1800 RPM motors. The drive train consists of two timing belts at the bottom of each row of turbines; a 5:1 ratio for the smaller generator and a 3:1 ratio for the larger one. A tachometer relay allows the turbine to cut in at 1800 RPM and a control box stores power using capacitors for an even flow of electricity onto the grid. back to questions
Q:	What happens if one of the blades is damaged?
A:	Unlike the large propeller-type turbines which become inoperative upon blade failure, MAT will continue to provide electricity to the grid. In fact, we estimate MAT will continue to send power to the grid efficiently with 6-8 lines disabled. back to questions
Q:	What are the maintenance costs?
A:	A structural and mechanical engineering analysis will be completed prior to implementing a scheduled maintenance program which will include bearings, brakes, generators and other moving parts. An expected annual cost is $400/MAT. back to questions
Q:	How much land will each MAT require?
A:	We expect MATs to be used in multi-unit arrays. Factoring in wake effects, turbines will be spaced at least 400 feet downwind of each other with 200 feet separation 90° of the prevailing winds. That allows one MAT per acre. back to questions

Q:	MAT has many more moving parts than the giant propeller-type turbines. Is this better?
A:	Yes. First, cost is reduced by using more and smaller components. Structural fatigue caused by vibration and lift stresses on huge surfaces is reduced. Also, operation isn't halted if one part fails. back to questions
Q:	Does MAT's design increase construction and maintenance costs?
A:	No. Most construction parts are off-the-shelf including the vibration damping bushings. Blades are custom designed but can be mass produced by many vendors, also reducing costs. Repairs are made at ground level rather than atop a huge structure. A roof protects the structure from the elements, reducing wear and tear on the turbine system and also allowing the use of less expensive materials. back to questions

MASS MEGAWATTS WIND POWER, INC.
95 Prescott Street Worcester,
MA 01605
Phone: (508)751-5432
Fax: (508) 842-1586

info@massmegawatts.com