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One hundred units of coal energy are converted to electricity, which is then used to power an incandescent light bulb that produces 1.2 units of light energy. This results in a 1.2% energy end-use efficiency.
The relevance and advantages of taking energy end-use efficiency into account when making energy economic decisions are covered in this article, which was commissioned by the InterAcademy Council. The idea of energy end-use efficiency is to deliver more desired services for each unit of energy spent. Amory Lovins asserts that improving energy end-use efficiency is typically the most effective, cost-effective, environmentally friendly, and underutilized method of delivering energy services.
Making engineering choices based on energy end-use efficiency enables systems to use energy more efficiently along energy conversion chains, allowing for more work to be done with it. Adopting energy end-use efficiency has multiple advantages, according to this paper, including better services (comfortable buildings with more eye-catching lighting), a stronger position in the world's fuel markets, and the integration of efficiency with supply.
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