• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ASME international mechanical engineering congress and exposition;IMECE2011 >IMPACT OF CHP SYSTEM COMPONENT EFFICIENCIES ON THE ECONOMIC BENEFIT OF CHP SYSTEMS USING SPARK SPREAD ANALYSIS
【24h】

IMPACT OF CHP SYSTEM COMPONENT EFFICIENCIES ON THE ECONOMIC BENEFIT OF CHP SYSTEMS USING SPARK SPREAD ANALYSIS

机译：运用散度分析法分析热电联产系统的效率对热电联产系统经济效益的影响

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A combined heating and power system (CHP) can take the place of a conventional system with separate heating and power (SHP) where electricity is purchased from the grid. The CHP system provides electrical energy through a prime mover located near the building it serves, and waste heat from this generation is captured and delivered to the building to provide thermal energy. For a CHP system to show an economic advantage over a conventional system, its operating costs must be lower when providing the same amount of thermal energy and electricity that would have come from the SHP system. The spark spread (SS), or price difference between purchased electricity and fuel, is used as a simple indicator as to whether the CHP system is economically viable. Rather than using a single value of SS as a cutoff for viability of the CHP system, a more detailed spark spread expressed in terms of the efficiencies of the CHP system and SHP system components can be used to determine if a CHP system is economically viable. In an initial feasibility study, the calculation of the SS is based on estimates of a number of variables. It is important to assess the likely impact of changes in certain of some of these variables, as such changes can affect the SS calculations. This paper presents a sensitivity analysis to determine the effects of different parameters on the cost ratio which is used to calculate SS, including: reference heating system efficiency, power generation unit (PGU) efficiency and CHP overall system efficiency. Because CHP system efficiency itself is a function of the PGU efficiency as well as the thermal efficiency, these two parts of the total system efficiency are also investigated separately. Since the cost of purchased electricity and fuel varies by geographic region, the required spark spread for a given system may indicate favorable economics for a CHP system in one location while the CHP system shows no potential for savings in another location. Therefore, the sensitivity analysis is considered for three different U.S. locations.
机译：热电联产系统（CHP）可以代替传统的具有独立热电联产（SHP）的系统，在传统的系统中，是从电网购买电力的。热电联产系统通过位于其所服务建筑物附近的原动机提供电能，并将这一代产生的废热收集起来并传递到建筑物中以提供热能。为了使CHP系统显示出优于常规系统的经济优势，当提供与SHP系统相同的热能和电能时，其运行成本必须更低。火花差（SS）或所购电力与燃料之间的价格差被用作CHP系统是否在经济上可行的简单指标。除了使用单一的SS值作为CHP系统可行性的临界值以外，可以使用以CHP系统和SHP系统组件的效率表示的更详细的火花传播来确定CHP系统在经济上是否可行。在初步的可行性研究中，SS的计算是基于对多个变量的估计。重要的是评估某些变量中某些变量的更改可能带来的影响，因为此类更改可能会影响SS的计算。本文介绍了一种敏感性分析，用于确定用于计算SS的不同参数对成本比率的影响，包括：参考供热系统效率，发电单元（PGU）效率和CHP整体系统效率。由于CHP系统效率本身是PGU效率以及热效率的函数，因此，还分别研究了总系统效率的这两部分。由于所购电力和燃料的成本随地理区域而变化，因此给定系统所需的火花散布可能表明一个位置的CHP系统具有良好的经济性，而CHP系统则没有显示另一位置的节能潜力。因此，考虑在美国三个不同地点进行敏感性分析。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号