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Title: Triaxial thermopile array geo-heat-flow sensor

Triaxial thermopile array geo-heat-flow sensor A triaxial thermopile array geothermal heat flow sensor is designed to measure heat flow in three dimensions in a reconstituted or unperturbed subsurface regime. Heat flow can be measured in conductive or permeable convective media. The sensor may be encased in protective pvc tubing and includes a plurality of thermistors and an array of heat flow transducers produce voltage proportional to heat flux along the subsurface regime and permit direct measurement of heat flow in the subsurface regime. The presence of the thermistor array permits a comparison to be made between the heat flow estimates obtained from the transducers and heat flow calculated using temperature differences and Fourier's Law. The device is extremely sensitive with an accuracy of less than 0.1 Heat Flow Units (HFU) and may be used for long term readings. 6 figs.
Authors: ; ; ;
Publication Date:
OSTI Identifier:5936770
Report Number(s):PATENTS-US-A7516399
ON: DE92004606; PPN: US 7-516399
DOE Contract Number:AC04-76DP00789
Resource Type:Patent
Data Type:
Resource Relation:Patent File Date: 30 Apr 1990
Research Org:Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Org:DOE; USDOE, Washington, DC (United States)
Country of Publication:United States
Language:English
Subject: 47 OTHER INSTRUMENTATION; 15 GEOTHERMAL ENERGY; HEAT FLOW; MONITORING; THERMOCOUPLES; DESIGN; ACCURACY; HEAT TRANSFER; INVENTIONS; THERMISTORS; TRANSDUCERS; UNDERGROUND; ENERGY TRANSFER; LEVELS; MEASURING INSTRUMENTS; SEMICONDUCTOR DEVICES Geothermal Legacy 440500* -- Thermal Instrumentation-- (1990-); 150900 -- Geothermal Engineering