ISO 17628:2015 PDF

Scope: This International Standard specifies requirements for the Geothermal Response Test (GRT). This test comprises the in situ determination of the thermal conductivity in saturated and unsaturated soil and rock in a heat exchanger installed in a borehole. For this test, liquid heat transfer media not subjected to phase changes are used. The thermal conductivity is an important parameter used in the design of thermal storage and thermal exchange systems. A Geothermal Response Test measures the temperature response to a thermal energy forcing of a borehole heat exchanger (BHE) or the extraction of thermal energy from a borehole. The temperature response is related to the thermal parameters of the ground and borehole filling material, such as thermal conductivity and borehole resistivity, and is therefore used to obtain estimated or derived values of these parameters. This International Standard applies to heat exchangers installed in vertical or inclined boreholes with length up to e.g. 400 m and with a diameter of up to 200 mm.

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

2015 ISO 17628:2015 Geotechnical investigation and testing - Geothermal testing - Determination of thermal conductivity of soil and rock using a borehole heat exchanger