Print Email Facebook Twitter Application of the Heat Flow Cone Penetration Test to measure the thermal conductivity of offshore soils Title Application of the Heat Flow Cone Penetration Test to measure the thermal conductivity of offshore soils Author Vrielink, Leon (TU Delft Civil Engineering & Geosciences; TU Delft Geoscience and Engineering) Contributor Vardon, P.J. (mentor) Daniilidis, Alexandros (graduation committee) Murali, M. (graduation committee) Degree granting institution Delft University of Technology Programme Geo-Engineering Date 2022-12-06 Abstract Interpretation of the thermal properties of soils is an important challenge in the field of geo-engineering, for example the development of geothermal energy solutions and for the design of electricity cable routes used for offshore wind farms. Of the thermal properties, the thermal conductivity is of most interest to find, as this determines the long-term thermal response of the soil. The soil volumetric heat capacity is of secondary interest, as this mainly influences the short-term thermal response.To find the thermal properties of offshore soils, a new in-situ test is being developed, called the heat flow cone penetration test (HF-CPT). This test uses a module that can be attached to a cone penetration test (CPT) which contains a heating element and temperature sensors. In this test, the penetration trough the soil is stopped at a required depth, the heating element is then activated, and the thermal response of the probe is measured. This thesis presents an interpretation method that can predict the thermal conductivity of soils based on the thermal response of the HF-CPT. The interpretation method is validated by conducting laboratory tests in four different materials: moist sand, saturated sand, kaolin clay and a water-agar mixture. With the interpretation method, excellent results are found with the laboratory tests conducted in saturated sand, kaolin clay and the water-agar mixture.The interpretation method is suitable for offshore testing, as the runtime of the method is short and the storage space is low. The interpretation method gives an accurate prediction for testing duration of about 300 seconds, which is fast when compared to other in-situ tests to measure the thermal conductivity of the soil. With this interpretation method, the HF-CPT can become a successful new in-situ test to determine the thermal conductivity of offshore soils. This way, the thesis contributes to the implementation of geothermal energy solutions and offshore cable routes for wind farms. Subject HF-CPTCPTThermal ConductivityVolumetric Heat CapacityOffshoreSoil Investigation To reference this document use: http://resolver.tudelft.nl/uuid:9476b5cc-2a38-4861-ae2a-93c0942fd95e Embargo date 2023-05-29 Part of collection Student theses Document type master thesis Rights © 2022 Leon Vrielink Files PDF Master_Thesis_HFCPT_Leon_ ... ielink.pdf 16.78 MB Close viewer /islandora/object/uuid:9476b5cc-2a38-4861-ae2a-93c0942fd95e/datastream/OBJ/view