VDI 4640 Blatt 5
Thermal use of the underground - Thermal response test (TRT)
At a glance
- German title
-
Thermische Nutzung des Untergrunds - Thermal-Response-Test (TRT)
- Publication date
- 2020-07
- Publisher
- Engl. VDI-Gesellschaft Energie und Umwelt
- Related manuals
- Number of pages
- 64
- Available in
- German, English
- Abstract
-
The standard describes a measurement method for the determination of thermal properties of the underground and the heat transfer characteristics of the ground heat exchanger. These parameters are necessary for the design of a heat source system. The thermal response test (TRT) is such a measurement method and allows a site survey in which following parameters can be determined: the effective thermal conductivity of the rock over the entire length of a borehole heat exchanger and the borehole resistance, the thermal resistance from the fluid to the rock for the used borehole heat exchanger.