• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems Program Committee;International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems >Exergy analysis of vapour compression refrigeration cycles for assessing thermal energy storage
【24h】

Exergy analysis of vapour compression refrigeration cycles for assessing thermal energy storage

机译：蒸气压缩式制冷循环的火用分析以评估热能储存

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Storage of thermal energy is very important in many engineering applications.For example,in wind energy storage systems,there is the need for an effective means by which the excess energy collected during the periods of high electricity production,can be stored for utilization during the period of low energy production.Aqueous salt solutions offer a simple and economical method for storing the excess thermal energy during economically most favourable supply of energy.This type viz.,solid-liquid phase change materials are useful because they store relatively large quantity of energy over a narrow temperature range.This work reports a thermodynamic study of exergy storage using aqueous sodium chloride solutions.The exergetic efficiency of the process was studied.Vapour compression refrigeration cycles are investigated as model processes.A number of refrigerants were investigated to test their suitability for the process.Besides the efficiency other parameters important from the economical point of view such as the storage volumes were also studied.In the model process a definite amount of exergy in the form of the compressor power will be supplied to the system comprising of vapour compression refrigerator to store possibly a large part of this exergy by freezing an aqueous salt solution.This power may be,for example the surplus power from a wind mill.For this purpose a number of refrigerants viz.,R1234yf,R134a,R152a,R236ea,R236fa,R245ca,R245fa,butane,isobutane,isobutene,propane,propene,dimethyl ether and ammonia were tested under different working conditions.It was found that at a condenser pressure of 1.8 MPa the working medium ammonia provides the most efficient process.The other interesting fluids are propene and propane.The common point among these fluids is the similarity of the boiling point and the dew point curves.Both belong to the category of wet fluids.
机译：在许多工程应用中，热能的存储非常重要。例如，在风能存储系统中，需要一种有效的方法来存储在高发电期间收集的多余能量，以便在发电期间使用。在经济上最有利的能源供应期间，盐水溶液提供了一种简单而经济的方法来存储多余的热能。这种类型的固液相变材料非常有用，因为它们可以存储相对大量的能量这项工作报告了使用氯化钠水溶液进行火力储存的热力学研究，研究了该过程的火力效率，以蒸汽压缩制冷循环为模型过程，研究了多种制冷剂以测试其适用性。除了效率外，其他一些重要的参数我还研究了诸如存储量之类的观点。在模型过程中，将一定量的以压缩机功率形式的火用能量提供给包括蒸气压缩式制冷机的系统，以通过冷冻盐水溶液。此功率可能是例如风车的剩余功率。为此，许多制冷剂即R1234yf，R134a，R152a，R236ea，R236fa，R245ca，R245fa，丁烷，异丁烷，异丁烯，丙烷，丙烯，二甲醚和氨在不同的工作条件下进行了测试。发现在1.8 MPa的冷凝器压力下，工作介质氨提供了最有效的过程。其他有趣的流体是丙烯和丙烷。这些流体是沸点曲线和露点曲线的相似点。两者都属于湿流体的范畴。

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