Heat Storage in Packed Bed Subjected to Periodically Changing Input

Abstract

顯熱利用方式 蓄熱係에서의 入口流體溫度가 周期的으로 變하는 境遇의 非定堂狀態의 特性과 應答特性을 考察하였다. 몇가지의 分析結果과 數値的인 計算値들이 주어졌다.

이들에 依하면 系의 非定常特性은 세가지 無次元變數인 時間 τ, 位置 η, 그리고 周期ω에 依해 規定된다. 큰값의 ω에 對하여 系는 빠른 應答을 가졌으며, 한편 ω와 η가 크고 τ가 작을 때 좋은 蓄熱效率을 나타내는 것을 보았다.

이들 結果로 부터 이러한 蓄熱系의 設計 및 運轉에 있어서의 最適條件을 決定할 수 있겠다.

This work investigates the transient characteristics and the dynamic responses of the specificheat type storage unit which is subjected to the periodically changing inlet fluid temperature. Some analytic results and numerically calculated values are presented.

According to these, the transient behavior of the system is governed by the three parameter, time, τ, length, η, and angular frequeny, ω. It is observed that higher values of ω yield faster response, while higher heat storage efficiency, Φ, is found for a systme with higher values of η & ωand / or lower values of τ.

The potimum design and operating conditions for this type unit may be deduced from the results.

This work investigates the transient characteristics and the dynamic responses of the specificheat type storage unit which is subjected to the periodically changing inlet fluid temperature. Some analytic results and numerically calculated values are presented.

According to these, the transient behavior of the system is governed by the three parameter, time, τ, length, η, and angular frequeny, ω. It is observed that higher values of ω yield faster response, while higher heat storage efficiency, Φ, is found for a systme with higher values of η & ωand / or lower values of τ.

The potimum design and operating conditions for this type unit may be deduced from the results.