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COMPREHENSIVE RENEWABLE ENERGY FEASIBILITY STUDY Sitka

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COMPREHENSIVE RENEWABLE ENERGY FEASIBILITY STUDY Sitka ( comprehensive-renewable-energy-feasibility-study-sitka )

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Wind Fuel Source Sitka’s wind potential has been rated in wind power class of 1, which is a POOR power rating. The average wind speeds range between 4.4mph in the winter to 3.0 mph in the summer months. (AEA, 2005) Appendix: Report Externalities: Natural Limiting Factors Wind Speed: Most critical factor of a success wind energy system. Wind is not constant and varies in speed due to factors such as the surrounding topography, built environment, and atmospheric conditions (Boyle, 268). Wind is the one factor that humans have no control over so working with proper citing, flexible zoning, and proper systems will maximize power generation for the wind energy system Externalities: Man‐Made Limiting Factors Engineered design: A critical factor in determining how efficient the system is pertaining to its power transfer (Heller, 2008). Today, many of the currents systems are close to achieving a maximum efficiency and engineers are constantly increasing system efficiencies through new design concepts (Economist, 2008). Swept Area: is determined by the total area of the blades, is used to calculate the power capacity of the system (Heller, 2008). This factor also has implication with bird death, safety concerns and noise output, which will be discuss in more detail. System Height: Increased height allows both for the clearing of structures and trees along with securing higher wind speeds. Externalities: Other Concerns In many states, wind energy systems are regulated only if the public’s welfare or safety is in danger (www.dsire.org). Determining the public’s welfare and safety is then left to the local planning boards. Planning boards must assess these concerns of the community and make decisions based on the public’s welfare and safety along with that of the individual property owners. The main concerns carried by citizens include such items as noise, aesthetics, property value, safety, and bird deaths (Boyle, 2004). Maintaining the aesthetics and peace of neighborhoods is a critical concern of communities and planners. Items such as lowered property values, loss of character, noise and safety of children shock the community into being hesitant in supporting wind energy systems. The concern of the noise impact of a small wind turbine is compared to that of a normal residential or office environment (Boyle, 2004). Some concerns that the hum from the spinning blades of the larger urban wind energy system to potentially cause general depression, headaches and nausea (Best, 2004). This has been studied extensively and is more relevant in large wind farms rather than a smaller single wind turbine (Best, 2004). Property and Aesthetic Value: The concern of property and aesthetic values can differ from each community. Negative publicity about wind energy has in the past influenced politicians, planners and citizens (Boyle, 2004). This has attributed to a negative effect on the way each community approaches implementing wind energy systems (Boyle, 2004). Restrictions on the heights of wind energy systems due to aesthetical concerns can have a direct effect on the functionality and efficiency of the system (Heller, 2008). Concerns of safety can be reduced by implementing a well‐designed wind energy system

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