Optimizing probe structure for dual-probe seafloor heat flow meter

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院边缘海地质重点实验室

	Optimizing probe structure for dual-probe seafloor heat flow meter
	Yang, XQ ; Shi, XB ; Xu, HH ; Xu, X ; Li, GB ; Guo, XW ; Luo, XH
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2009
卷号	52 期号:5 页码:1280-1288
关键词	Dual-probe seafloor heat flow meter Structure optimization Dual-probe heat pulse (DPHP) method Pulsed Finite Line Source (PFLS) model Finite element numerical modeling
ISSN号	0001-5733
通讯作者	yxq2081@scsio.ac.cn
中文摘要	This paper alms to optimize the probe structure for dual-probe seafloor heat flow meter. Firstly, with a constructed finite element model for seafloor pulsing dual-probe, a series of temperature-time data, which are used as the "observed" data, can be obtained by giving different probe structures and thermal properties. Then, we calculated medium thermal conductivity and its corresponding maximum relative error (RE lambda-UL) by using Pulsed Finite Line Source (PFLS) model, and optimize the probe structure in which RE lambda-UL is minimized. Finally, we optimized dual-probe structure with the now available manufacture technique of seafloor heat flow probe. Our results show that: (1) under each distinct combination of probe heat pulse strength (q), temperature measurement error (Delta T-m) and probe length (L), there must be a best probe spacing (Best_r), at that position, RE lambda-UL is least; (2) Best_r can be accordingly increased with q increasing or Delta T-m decreasing; (3) when q,Delta T-m and probe radius (a) are given! there is a significant linear positive correlation between Best_r and L; (4) when a is 1.0 mm, q is from 628.0 similar to 1100.0 J . m(-1), Delta T-m is from 0.5 mK to 1.0 mK, and L is from 20.0 mm to 42. 0 mm, Best_r ranges from 18.0 mm to 30.0 mm. In this case, the maximum relative error in medium thermal conductivity is within 5.5%, meanwhile, it reaches the maximum measurement temperature within 6 minutes, which means that the temperature measurement just needs about 7 minutes to calculate medium thermal conductivity after the beginning of pulse heating, which is about 8 minutes shorter than that of the Lister-type heat flow meter.
学科主题	Geochemistry & Geophysics
收录类别	SCI
原文出处	SCIENCE PRESS
WOS记录号	WOS:000266542700017
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/4620]
专题	南海海洋研究所_中科院边缘海地质重点实验室
推荐引用方式 GB/T 7714	Yang, XQ,Shi, XB,Xu, HH,et al. Optimizing probe structure for dual-probe seafloor heat flow meter[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2009,52(5):1280-1288.
APA	Yang, XQ.,Shi, XB.,Xu, HH.,Xu, X.,Li, GB.,...&Luo, XH.(2009).Optimizing probe structure for dual-probe seafloor heat flow meter.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,52(5),1280-1288.
MLA	Yang, XQ,et al."Optimizing probe structure for dual-probe seafloor heat flow meter".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 52.5(2009):1280-1288.