PROBE FOR MEASURING SOIL SPECIFIC-HEAT USING A HEAT-PULSE METHOD

被引：333

作者：

CAMPBELL, GS ^{[1
]}

CALISSENDORFF, C ^{[1
]}

WILLIAMS, JH ^{[1
]}

机构：

[1] INT CROPS RES INST SEMI ARID TROP, CTR SAHELIEN, NIAMEY, NIGER

来源：

SOIL SCIENCE SOCIETY OF AMERICA JOURNAL | 1991年 / 55卷 / 01期

关键词：

D O I：

10.2136/sssaj1991.03615995005500010052x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Temperature rise, measured a short distance from a line heat source, can be used to determine the volumetric specific heat of soil and other materials. Volumetric specific heat is linearly related to the inverse of the temperature rise. The purpose of this note is to describe the construction and performance of a device for measuring specific heat using the line source method. The device was constructed from two hypodermic needles, 0.813 mm in diam. and 28 mm long, and spaced 6 mm apart. One needle contained a heater and the other a thermocouple. The temperature rise from heat pulses given to the heater were measured with the thermocouple. The coefficientof variation (CV) of specific heat on replicate samples was around 1%. Since water is the main variable component of the specific heat in nonswelling soil, changes in water content might be resolved to 0.01 or better in nonswelling soils.

引用

页码：291 / 293

页数：3