Abstract

Authors

WATANABE Tsutomu, OHTANI Yoshikazu

Year

1998

Title

樹幹熱伝導の計算手法に関する考察
A comparative study on Calculation Method of Heat Conduction in Trees Stems

Journal

農業気象
Journal of Agricultural Meteorology

Volume

54(1)

Page

47-54

DOI


Keywords

計算手法、森林、貯熱、熱収支、バイオマス
Biomass, Calculation scheme, Energy budget, Forest, Heat storage.

URL

http://rms1.agsearch.agropedia.affrc.go.jp/contents/JASI/pdf/society/57-1499.pdf

Abstract

As a part an estimation method of the heat storage rate within forest biomass, two simple schemes are presented for a calculation of the heat conduction into a cylindrical material. One is a modified version of the so-called Force- Restore method, and the other is a method based on the digital filter. Both methods are tested against analytical solutions of the heat-conduction equation for given diurnal cycles of the cylinder-surface temperature. The modified Force-Restore method gives acceptable results when the diurnal change in the surface temperature is not very different from a sinusoidal wave of 1-day cycle. The digital filter method can produce correct results for any patterns of diurnal cycles, if the time series of the surface temperature is given for more than 1-day period centered by the evaluation time of heat storage. Both method can be applied to an entire forest, if stems of the forest are classified into adequate classes in terms of their radii.

Site

KWG

Remarks

in Japanese with an English abstract