...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Refrigeration >Design and performance evaluation of reciprocating refrigeration systems
【24h】

Design and performance evaluation of reciprocating refrigeration systems

机译：往复式制冷系统的设计与性能评估

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

The characteristic performance curves of vapor-compression refrigeration systems are defined as a plot between the inverse coefficient of performance (1/COP) and inverse cooling capacity (l/Q{sub}(evap)) of the system. Using the actual data of asimple vapor-compression system, performance curves of the system are obtained. The curves were found to be linear and this linear relation between 1/COP and 1/Q{sub}(evap) is explained in the light of various losses of the system, resulting from theirreversibilities losses due to finite rate of heat transfer in the heat exchangers and non-isentropic compression and expansion in the compressor and expansion valve of the system, respectively. A finite-time thermodynamic model which simulates theworking of an actual vapor-compression system is also developed. The model is used to study the performance of a variable-speed refrigeration system in which the evaporator capacity is varied by changing the mass-flow rate of the refrigerant, whilekeeping the inlet chilled-water temperature as constant. The model is also used for predicting an optimum distribution of heat-exchanger areas between the evaporator and condenser for a given total heat exchanger area. In addition, the effect ofsubcooling and superheating on the system performance is also investigated.
机译：蒸气压缩式制冷系统的特征性能曲线定义为系统的性能反向系数（1 / COP）与制冷能力反向（l / Q {sub}（evap））之间的关系图。利用简单的蒸汽压缩系统的实际数据，获得了系统的性能曲线。发现这些曲线是线性的，并且根据系统的各种损失解释了1 / COP和1 / Q {sub}（evap）之间的线性关系，这是由于在有限的热传递速率下它们的可逆性损失所致。热交换器和系统的压缩机和膨胀阀中的非等熵压缩和膨胀。还建立了模拟实际蒸汽压缩系统工作的有限时间热力学模型。该模型用于研究变速制冷系统的性能，在该系统中，通过改变制冷剂的质量流量来改变蒸发器的容量，同时保持进口冷水温度恒定。对于给定的总换热面积，该模型还用于预测蒸发器和冷凝器之间换热面积的最佳分布。此外，还研究了过冷和过热对系统性能的影响。

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