Energy efficiency potentials: Contrasting thermodynamic, technical and economic limits for organic Rankine cycles within UK industry
Energy efficiency potentials: Contrasting thermodynamic, technical and economic limits for organic Rankine cycles within UK industry
复制标题
能源效率潜力：对比英国工业内有机朗肯循环的热力学、技术和经济限制
DOI：
10.1016/j.apenergy.2015.06.046
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发表时间：
2016
期刊：
影响因子：
11.2
通讯作者：
Chen Q
中科院分区：
文献类型：
--
作者：
Chen Q
热力学定律对在特定应用中可以实现的节能设定了理论限制。这种热力学潜力在实践中是无法达到的，节能的技术潜力取决于现有技术的性能。通常只有被认为经济的技术应用才会被考虑安装。这一经济潜力本身将无法充分实现，实际节省的资金将受到进一步障碍的限制。英国工业余热可用性的数据库被用来估计的热力学，技术和经济潜力时，将这种余热转化为电力使用有机朗肯循环（ORC）。技术和经济信息是根据现有装置和制造商报告的信息。在目标投资回收期内，装置的经济效益总计约为3.5 PJ/年发电量，主要集中在钢铁、化工和水泥子行业。然而，这一结果是敏感的输入参数，特别是未来的电价和所需的投资回收期，这是不确定的。因此，对一系列可能的情况进行了调查。这些结果构成了讨论如何缩小已查明的潜力与实际实现的节约之间的“差距”的基础。
The laws of thermodynamics set a theoretical limit on the energy savings that can be realised in a given application. This thermodynamic potential cannot be reached in practice, and a technical potential for energy savings is defined by the performance of available technology. Only applications of the technology that are considered economic will usually be considered for installation. This economic potential will itself not be fully realised, with the actual savings that are achieved limited by further barriers. A database on surplus heat availability within UK industry was used to estimate the thermodynamic, technical, and economic potentials when converting this surplus heat to electricity using organic Rankine cycles (ORCs). Technical and economic information was based on that reported from existing installations and manufacturers. Installations economic over the target payback period totalled approximately 3.5 PJ/yr of electricity generation, primarily in the steel, chemicals and cement subsectors. However, this result is sensitive to the input parameters, particularly the future price of electricity and required payback period, which are uncertain. Therefore a range of possible scenarios were investigated. The results form a basis for discussion on how to close this “gap” between the identified potentials and the savings realised in practice.