Emergy evaluation of polygeneration systems

2007年第1卷第2期

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《能源前沿（英文）》 >> 2007年第1卷第2期 doi: 10.1007/s00000-007-0030-x

Emergy evaluation of polygeneration systems

1.Department of Thermal Engineering, Tsinghua University, Beijing 100084, China; College of Engneering, Shanxi University, Taiyuan 030013, China; 2.Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;

发布日期： 2007-06-05

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摘要

To expand the application range of the emergy evaluation method, an emergy evaluation index, which can reflect the particular feature of polygeneration systems, has been elaborated on the basis of energy and emergy conservation, guided by the fundamental principle of emergy analysis. With this index, the cost structure, emission effect and energy saved were all considered on the same level of importance. To exemplify, some power polygeneration systems (methanol-power generation, hydrogen-power generation) are considered using coal as the basic fuel. The results showed that emergy evaluation indices are practical for comprehensively evaluating polygeneration systems and their sustainability, which is influenced by such factors as the joining mode of polygeneration and the technologies used. The sustainability of polygeneration systems, which work on an appropriate ratio of fuel-to-electric power basis, is higher than that of singular production systems.

关键词

fuel-to-electric ; sustainability ; importance ; polygeneration ; practical