• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>NATO Advanced Study Institute on Microscale Heat Transfer: Fundamentals and Applications in Biological and Microelectromechanical Systems; 20040718-30; Cesme-Lzmir(TR) >BINARY-FLUID HEAT AND MASS TRANSFER IN MICROCHANNEL GEOMETRIES FOR MINIATURIZED THERMALLY ACTIVATED ABSORPTION HEAT PUMPS
【24h】

BINARY-FLUID HEAT AND MASS TRANSFER IN MICROCHANNEL GEOMETRIES FOR MINIATURIZED THERMALLY ACTIVATED ABSORPTION HEAT PUMPS

机译：微型热活化吸收泵的微通道几何中的二元流体传热和传质

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

A comprehensive treatment of the development of heat and mass transfer devices used in binary-fluid phase change processes was presented. Binary-fluid absorption, desorption, condensation and other phase change processes are prevalent in a variety of industries such as chemical processing, food processing, waste heat recovery, thermally activated space-conditioning systems, and others. In this paper, components required for the development of miniaturized thermally activated heat pumps that use working fluid pairs with volatile and nonvolatile absorbents were addressed. A recently patented innovative geometry that uses microchannel tube arrays was shown to result in extremely compact components for ammonia-water heat pumps due to high heat and mass transfer coefficients in the binary fluid as well as the coupling fluid. Preliminary designs developed using empirical coupled heat and mass transfer considerations yielded prototype designs that were investigated experimentally to validate the miniaturization technology. High-speed flow visualization experiments conducted during the actual heat and mass transfer process clearly illustrated the details of the solution flows in these components. The importance of accomplishing uniform flow distribution in the tube banks was also illustrated. Initially encountered distribution problems were resolved by using improved solution distribution devices, which component heat duties considerably. The absorption heat load for a 10.55 kW cooling system was transferred in an extremely compact 0.127x0.127x0.476 m envelope. It was also demonstrated through experiments and analyses that the same microchannel tube array could function equally well as an absorber and a desorber. In fact, the utilization of this uniform microchannel geometry for all the major components of an absorption system (absorber, desorber, condenser, rectifier, and evaporator) will result in substantial reductions in the capital costs of the overall system, facilitating the widespread implementation of thermally activated heat pumps.
机译：介绍了一种用于二元流体相变过程的传热和传质设备开发的综合方法。二元流体的吸收，解吸，冷凝和其他相变过程在许多行业中都很普遍，例如化学加工，食品加工，废热回收，热活化空间调节系统等。在本文中，解决了开发微型热活化热泵所需的组件，这些热泵使用具有挥发性和非挥发性吸收剂的工作流体对。由于使用了二元流体和耦合流体中较高的传热系数和传质系数，因此使用微通道管阵列的最近获得专利的创新几何结构显示出用于氨水热泵的极其紧凑的组件。使用经验耦合的传热和传质考虑开发的初步设计产生了原型设计，并对其进行了实验研究以验证微型化技术。在实际的传热和传质过程中进行的高速流动可视化实验清楚地说明了这些组件中溶液流动的细节。还说明了在管束中实现均匀流量分配的重要性。最初遇到的分配问题通过使用改进的溶液分配设备得以解决，该设备的组件热负荷相当大。将10.55 kW冷却系统的吸收热负荷转移到一个非常紧凑的0.127x0.127x0.476 m的外壳中。通过实验和分析还表明，相同的微通道管阵列可以兼作吸收器和解吸器。实际上，对于吸收系统的所有主要组件（吸收器，解吸器，冷凝器，精馏器和蒸发器）采用这种统一的微通道几何形状，将导致整个系统的资本成本大幅降低，从而促进了广泛应用热活化热泵。

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