• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical modeling of fluid flow and coupled heat and mass transfer in a counter-cross-flow parallel-plate liquid-to-air membrane energy exchanger
【24h】

Numerical modeling of fluid flow and coupled heat and mass transfer in a counter-cross-flow parallel-plate liquid-to-air membrane energy exchanger

机译：逆流平行板液-气膜换热器中流体流动和传热传质的数值模拟

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

In this paper, a numerical model is developed and applied to investigate the fluid flow and heat and mass transfer in a counter-cross-flow liquid-to-air membrane energy exchanger (LAMEE). An iterative finite-difference method is used to solve two-dimensional steady-state flow field and the coupled heat and moisture transfer equations for the liquid desiccant and air streams. The model is validated with experimental data, and the agreement is within ±10%. The results of the numerical model show that the phase change energy plays a key role in the establishment of the temperature and moisture content distributions in the LAMEE. In the process of air cooling and dehumidification, the liquid desiccant temperature is increased not only by the sensible heat transfer, but also by the moisture transfer. Also, the capacity of the liquid desiccant to absorb moisture from the air is shown to be affected by the sensible energy transfer between the two fluids. Moreover, it is shown that the counter-cross-flow LAMEE effectiveness is between the effectiveness of pure counter-flow and pure cross-flow LAMEEs with the same membrane area. It is recommended for a practical design that the aspect ratio and entrance ratio should be less than 0.2 and 0.1 respectively, in order to achieve a high performance of the counter-cross-flow design that approaches within 2% the performance of a counter-flow design. Alternately, the membrane area of the practical design can be increased slightly (by 10%) so that the counter-cross-flow LAMEE has the same performance as a counter-flow LAMEE.
机译：在本文中，建立了一个数值模型并将其应用于研究逆流流液-气膜能量交换器（LAMEE）中的流体流动以及传热和传质。迭代有限差分法用于求解二维稳态流场以及液体干燥剂和空气流的耦合的热与湿传递方程。该模型已通过实验数据验证，一致性在±10％以内。数值模型的结果表明，相变能量在建立LAMEE的温度和水分含量分布中起着关键作用。在空气冷却和除湿的过程中，液体干燥剂的温度不仅由于显着的热传递而升高，而且由于水分的传递而升高。同样，液体干燥剂吸收空气中水分的能力也受到两种流体之间显着能量传递的影响。而且，表明逆流LAMEE的有效性介于具有相同膜面积的纯逆流和纯错流的LAMEE之间。对于实际设计，建议长宽比和入口比分别小于0.2和0.1，以使逆流设计的高性能达到逆流性能的2％以内设计。或者，可以将实际设计的膜面积稍微增加（增加10％），以使逆流LAMEE具有与逆流LAMEE相同的性能。

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