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- W611473506 abstract "Energy is a key concept for understanding the functioning of any biophysical system. In physics, energy is defined as the ability to do work. The physical notion of energy encompasses mechanical (potential and kinetic) energy, radiant energy, chemical energy, heat, electric energy, and nuclear energy. Biophysical structures of society are intrinsically linked with the biosphere through the energy flows required for their growth, sustenance, and functioning. Socioeconomic energy flows include food for humans and livestock as well as all the energy required for artifacts (infrastructures and machinery). Energy balances published by statistical offices trace the flow of energy through an economy. They include data on primary energy, energy conversion processes, final energy, and sometimes useful energy, usually in sectoral disaggregation. These energy balances include ‘technical energy,’ i.e., energy used in machinery and artifacts but neither food and feed required to nourish humans and livestock nor their physical work. More inclusive methods of energy flow analysis can be used to derive a comprehensive picture of society's energetic metabolism. This is particularly important when looking at socioecological transitions, e.g., from agrarian to industrial society due to the large importance of food, feed, and physical work in preindustrial societies. In addition to measuring the energy throughput of societies, methods exist to evaluate the efficiency with which energy is gained and used. For example, the amount of energy society needs to invest per unit of energy obtained from a particular source – its ‘energy return on investment’ – is a key characteristic of any primary energy source. This article explains some basics of energetics and discusses methods to account for energy use (conventional energy balances, comprehensive energy flow analysis) as well as the efficiency of energy provision and energy use." @default.
- W611473506 created "2016-06-24" @default.
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- W611473506 date "2015-01-01" @default.
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- W611473506 title "Energy Flow Analysis" @default.
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- W611473506 doi "https://doi.org/10.1016/b978-0-08-097086-8.91059-6" @default.
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