EN ISO 17628:2015 Geotechnical investigation and testing - Geothermal testing - Determination of thermal conductivity of soil and rock using a borehole heat exchanger (ISO 17628:2015)
This International Standard specifies requirements for the Geothermal Response Test (GRT). With the GRT, an in-situ determination of the thermal conductivity of the subsoil is carried out in water-saturated or non-water-saturated soil and rock using a geothermal probe inserted into a borehole. Liquid heat transfer media that are not subject to phase changes are used for this experiment. Thermal conductivity is an essential parameter for the dimensioning and design of heat storage and geothermal probe systems. In a geothermal reaction test, a certain heat energy is introduced into the subsoil via a geothermal probe (EWS) or extracted from a borehole, then the temperature reaction is measured. The temperature response depends on the thermal parameters of the subsoil and the material used to fill the borehole, e.g. B. on the thermal conductivity and electrical resistivity of the borehole; Therefore, values for these essential parameters can be estimated or derived from the course of the temperature curve. This International Standard applies to geothermal probes that are inserted vertically or obliquely into the ground with a length of up to 400 m and a diameter of up to 200 mm.
EN ISO 17628:2015 Referenced Document
EN 16228-1:2014 Drilling and foundation equipment - Safety - Part 1: Common requirements
EN 16228-2:2014 Drilling and foundation equipment - Safety - Part 2: Mobile drill rigs for civil and geotechnical engineering@ quarrying and mining
ISO 14688-1:2002 Geotechnical engineering - Identification and classification of soil - Part 1: Identification and description
ISO 14689-1:2003 Geotechnical investigation and testing - Identification and classification of rock - Part 1: Identification and description
ISO 22475-1:2006 Geotechnical investigation and testing - Sampling methods and groundwater measurements - Part 1: Technical principles for execution
VDI 4640 Blatt 1-2010 Thermal use of the underground - Fundamentals, approvals, environmental aspects
2015EN ISO 17628:2015 Geotechnical investigation and testing - Geothermal testing - Determination of thermal conductivity of soil and rock using a borehole heat exchanger (ISO 17628:2015)