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Kidphysics
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You never see them on small scales. Why not use small turbines with magnets on them to start a current?
Yes but I'll bet that a dentists drill has never been sold on the basis that it is more efficient then a competitors. Same with APUs efficiencey will be low down the list of desirable criteria when speccing one.Enthalpy said:What do you call small? Dentists have turbines in D=10mm tools.
In such a size, objects are manufactured easily with <100µm tolerance. Bigger wheels need clearance because of centrifugal force that strains parts, made worse by creeping if hot.
Kidphysics said:You never see them on small scales. Why not use small turbines with magnets on them to start a current?
The optimal size for a turbine to be efficient depends on various factors such as wind speed, blade design, and location. Generally, larger turbines are more efficient as they can capture more wind energy. However, the maximum size for efficient turbines may vary depending on the specific conditions.
Turbines can become too large to be efficient if they are unable to withstand the stress and strain caused by strong winds. Additionally, larger turbines may also face challenges with transportation and installation, making them less efficient in terms of overall cost and energy production.
The average size of an efficient turbine can vary depending on the location and type of turbine. Onshore turbines typically range from 2-3 megawatts (MW), while offshore turbines can range from 3-8 MW. However, advancements in technology have allowed for larger turbines to be efficient, with some offshore turbines reaching sizes of up to 12 MW.
The size of a turbine directly affects its efficiency as larger turbines are able to capture more wind energy and generate more electricity. However, there is a limit to the size of a turbine, as it can become less efficient if it is too large and unable to withstand strong winds or is too costly to transport and install.
Besides size, other factors that can affect the efficiency of a turbine include wind conditions, blade design, and maintenance. Turbines located in areas with consistent and strong winds will be more efficient compared to those in low wind areas. Additionally, proper maintenance and regular inspections can also improve the efficiency of a turbine.