• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy Conversion & Management >Full-scale multi-ejector module: for a carbon dioxide supermarket refrigeration system: Numerical study of performance evaluation
【24h】

Full-scale multi-ejector module: for a carbon dioxide supermarket refrigeration system: Numerical study of performance evaluation

机译：全尺寸多喷射器模块：用于二氧化碳超级市场制冷系统：性能评估的数值研究

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 performance of fixed ejectors installed in a multi-ejector module in a carbon dioxide refrigeration system is discussed in this paper. To analyse the module operation, three-dimensional ejector models including the inlet and outlet collecting ducts were considered. The tests were performed for three of four vapour ejectors of different sizes that compose the multi-ejector pack. The testing modes included the serial and parallel operation of the fixed units in operating conditions that are characteristic for the supermarket refrigeration unit working at high ambient temperatures. All numerical simulations were performed using the Validated Homogeneous Equilibrium Model implemented on the ejectorPL computational tool for typical transcritical parameters at the motive nozzle port. The detailed analysis was executed separately for the ejectors and the ducts of the module collectors. The results discussion concerned the crucial parameters for such an installation like the pressure and vapour quality distribution. Negligible influence of the motive nozzle collector and a crucial influence of the outlet collector shape was indicated. The global performance analysis showed that the multi-ejector pack provides high and stable performance of all installed ejectors over the entire range of the considered operating conditions for supermarket application. Areas of the possible pressure loss reduction and the uniformity growth in the vapour quality distribution were presented. Finally, according to the multi-ejector pack ducts analysis, the potential areas for module shape optimisation were indicated as well. (C) 2017 Elsevier Ltd. All rights reserved.
机译：本文讨论了固定在二氧化碳制冷系统中多喷射器模块中的喷射器的性能。为了分析模块操作，考虑了包括入口和出口收集导管的三维喷射器模型。对组成多喷射器组件的四个不同尺寸的蒸汽喷射器中的三个进行了测试。测试模式包括在超级环境中的超级市场制冷机组所特有的工作条件下，固定单元的串联和并联运行。所有数值模拟均使用在EjectorPL计算工具上实施的，经过验证的均质平衡模型进行，用于动力喷嘴端口处的典型跨临界参数。对弹出器和模块收集器的导管分别进行了详细的分析。结果讨论涉及此类设备的关键参数，例如压力和蒸汽质量分布。指出了动力喷嘴收集器的影响可忽略不计，而出口收集器形状的影响则很小。全球性能分析表明，在超市应用考虑的整个工作条件范围内，多喷射器组件可为所有已安装的喷射器提供高而稳定的性能。提出了可能的压力损失降低和蒸气质量分布均匀性增长的区域。最后，根据多喷射器管道的分析，还指出了模块形状优化的潜在区域。 （C）2017 Elsevier Ltd.保留所有权利。

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