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Comment [LU6]: This section looks thin. I understand that you won’t be able to thoroughly deal with all the options available here. As you can’t, please do what you can but also identify areas where more analysis and opportunities should be pursued. This could perhaps be a whole new dedicated area of study for a summer intern... if you find enough needs/opportunities that could be pursued, we could task one of the intern positions to work on this—perhaps with Dan York’s group. Overview ENERGY EFFICICIENCY & CONSERVATION In the topic discussion concerning the opportunity to implement any one of these renewable energy systems and their feasibility, the underlying assumption the establishment of a energy consumption habits that incorporate energy efficiency and conservation measures. This will both lower the overall load demanded both on the utility‐scale and for residential use. Energy efficiency and conservation measures is the most cost effective energy option and provides an immediate cost savings to both the customer and service provider. Energy efficiency and conservation becomes even more critical when you add the fact our fossil fuel resources are limited. Eventually our society will have no choice but to accept this fact and make the transition to both alternative lifestyles and energy generation. This section will give an overview of programs, available information, funding, and how citizens can make a substantial impact in making Sitka, Alaska a sustainable community for present and future generations. Energy Use Conservation and Demand Side Management (City Electrical Dept Report) Energy conservation and efficiency measures that can be taken begin at the power plants. We have developed a computer model of the hydroelectric system, using 50 years of historical water records, to evaluate different operating scenarios. Using such techniques we are managing the use of water for power generation to achieve the most efficient use of that water. A water turbine’s efficiency varies by as much as 20% depending on how the turbine is loaded. In the past we have not had to pay too much attention to the efficient use of water as we had more water than we could use; but, those days are over. Now we must pay close attention to managing the use of water to maximize our hydroelectric energy production. The amount of water will vary seasonally. The maximum water is in the fall of the year when the reservoirs are full. The minimum is in the spring and early summer when the reservoirs are drawn down to their lowest level of the year. Our strategy is to further develop dual‐fuel and interruptible electric service for all classes of consumers to enable us to shift loads on a seasonal basis. When the computer model predicts a high risk of diesel generation (particularly in the early summer when the water level in the reservoirs is lowest) then the interruptible loads will be shut‐off. The goal is to minimize the amount of supplemental diesel generated power required to meet Sitka’s power requirements. It is far more efficient to burn fuel oil in a 70% to 80% efficient boiler or furnace than it is to burn that same fuel in a 35% to 40% efficient diesel generator. This demand‐side management will entail promoting dual‐fuel heating systems and developing a control system where the interruptible electric heating loads can be remotely switched on and off from the control room of the electric power system. At the consumer level, improved weather tightness of buildings, encouraging the use of dual‐fuel heating systems, heat pumps and lifestyle changes (smaller heated spaces, lower thermostat settings, smaller cars, walk or bike not drive, etc.) that reduce the amount of energy consumed all serve the goal of conserving energy and using our energy resources efficiently in order to keep the community’s total energy costs, as well as carbon emissions, as low as possible. Even so, Sitka’s total electric energy use is forecast to increase (city of Sitka 2008 power plan)‐Direct quotePDF Image | COMPREHENSIVE RENEWABLE ENERGY FEASIBILITY STUDY Sitka
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