• 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 >Determination of wall decay times by use of a polynomial equation
【24h】

Determination of wall decay times by use of a polynomial equation

机译：使用多项式方程确定壁面衰减时间

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 determination of the thermal decay times of the wall of a building is an essential step in calculating the wall's thermal transfer coefficients. The series of decay times z_j is normally found by varying time z and searching for zeros of e_(12), one of the four elements of the wall transmission matrix. It is demonstrated here that they can be efficiently found by expressing e_(12) as a polynomial as a function of time z and then solving the polynomial for e_(12)=0. The method is illustrated by wall examples whose decay times are known by other means. A simple procedure is demonstrated to check whether any solutions have been missed. The article summarises an existing procedure to check for missing roots of e_(12) by also finding solutions to e_(11) = 0 and in an appendix shows the structure of the solutions which are found when all four values of e_(ik) of the transmission matrix are set equal to zero.
机译：确定建筑物墙壁的热衰减时间是计算墙壁的传热系数的重要步骤。通常通过改变时间z并搜索壁传输矩阵的四个元素之一e_（12）的零来找到一系列的衰减时间z_j。在此证明，可以通过将e_（12）表示为时间z的函数的多项式，然后对e_（12）= 0求解多项式，从而有效地找到它们。通过墙壁示例来说明该方法，其衰减时间通过其他方式已知。演示了一个简单的过程，以检查是否遗漏了任何解决方案。本文总结了一个现有的过程，该过程还通过查找e_（11）= 0的解来检查e_（12）的缺失根，并且在附录中显示了当e_（ik）的所有四个值都等于时发现的解的结构。传输矩阵设置为零。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利