Project-Management
| Name | Working area(s) | Contact | |
|---|---|---|---|
| Dr.-Ing. Constantin Balzer 2014 - 2020 (lectureship 2021, 2022) | Lecturer of High voltage technology 1 and high voltage technology 2 in 2021 and 2022 |
Project description
In order to quantify the thermophysical, hydraulic and geotechnical properties of soils and bedding materials, an evaporation test was modified among others to measure all relevant thermophysical and hydraulic properties of a sample simultaneously in comparatively short time.
To assess the dependency of these properties on the degree of compaction as well as the influence of the latent and convectional heat transport on the effec-tive heat conductivity, a special measurement device was developed and patented
Moreover, a true to scale experimental configura-tion was set up with the purpose of recreating the drying out of soil in the vicinity of the cable that has a significant negative impact on the ampacity rating.
Laboratory Experiments
In order to quantify the thermophysical, hydraulic and geotechnical properties of soils and bedding materials, an evaporation test was modified among others to measure all relevant thermophysical and hydraulic properties of a sample simultaneously in comparatively short time.
To assess the dependency of these properties on the degree of compaction as well as the influence of the latent and convectional heat transport on the effec-tive heat conductivity, a special measurement device was developed and patented
Moreover, a true to scale experimental configura-tion was set up with the purpose of recreating the drying out of soil in the vicinity of the cable that has a significant negative impact on the ampacity rating.
Real-Scale Field Experiment Cable Test Site
In order to quantify the implact of environmental conditions, a large field experiment was built at TU Darmstadt in 2013. This experimental set-up ena-bles for investigations on various cables and cable arrangement in different bedding materials and soils under natural conditions. The overall dimen-sion of the test site is 14 m by 6 m, divided into four sections of 3.5 m length that are hydraulically and thermally decoupled by each other. The changes of the thermal and hydraulic condi-tions within the test site are monitored by numerous sensors.
Numeric Modelling
The data that is collected by the laboratory experiments and the cable test side are finally used to validate numeric models. They implement all relevant physical processes and allow conducting parameter variations of all kind in order to derive general conclusions that may afterwards be implemented in the grid operation.
