TU Darmstadt / ULB / TUbiblio

Mechanical Evaluation of Sintered Macroporous High Density Polyethylene Filter Elements for Shallow Geothermal Application

Rüther, J. and Lederer, S. and Peth, C. and Sass, I. (2016):
Mechanical Evaluation of Sintered Macroporous High Density Polyethylene Filter Elements for Shallow Geothermal Application.
In: Journal of Porous Media, 19 (3), pp. 219-232. Begell House, ISSN 1091-028X (print), 1934-0508 (online),
DOI: 10.1615/JPorMedia.v19.i3.30,
[Article]

Abstract

High-density polyethylene (PE-HD) is a suitable material for the filtration of groundwater for shallow geothermal utilization based on its chemical and physical properties. The mechanical performance of filters can be evaluated by uniaxial compression. The compressive strength of sintered polymeric bodies depends on porosity, pore size, molecular weight, and bonding strength of the sintered particles to each other at ambient temperature. Mechanical parameters were analyzed for various manufactured filter and different polyethylene types. The mechanical performance of the porous filters is reduced with increasing porosity. Compressive strength of the samples increases with molecular weight of the sintered material. However, the porosity of the filters has a larger effect on the compressive strength than the molecular weight of the polyethylene type. Fracture behavior of the polymeric bodies is an indicator for bonding strength of sintered particles and consequently compressive strength. Fitting data to strength−porosity models proves that strength of the filters can be described adequately by Duckworth's model. The thermomechanical behavior for temperature range from 10° C to 40° C can be explained by the Arrhenius law. Referring to the analyzed mechanical performance at different temperatures, the utilization in shallow geothermal wells can be suggested at temperatures up to 20° C.

Item Type: Article
Erschienen: 2016
Creators: Rüther, J. and Lederer, S. and Peth, C. and Sass, I.
Title: Mechanical Evaluation of Sintered Macroporous High Density Polyethylene Filter Elements for Shallow Geothermal Application
Language: English
Abstract:

High-density polyethylene (PE-HD) is a suitable material for the filtration of groundwater for shallow geothermal utilization based on its chemical and physical properties. The mechanical performance of filters can be evaluated by uniaxial compression. The compressive strength of sintered polymeric bodies depends on porosity, pore size, molecular weight, and bonding strength of the sintered particles to each other at ambient temperature. Mechanical parameters were analyzed for various manufactured filter and different polyethylene types. The mechanical performance of the porous filters is reduced with increasing porosity. Compressive strength of the samples increases with molecular weight of the sintered material. However, the porosity of the filters has a larger effect on the compressive strength than the molecular weight of the polyethylene type. Fracture behavior of the polymeric bodies is an indicator for bonding strength of sintered particles and consequently compressive strength. Fitting data to strength−porosity models proves that strength of the filters can be described adequately by Duckworth's model. The thermomechanical behavior for temperature range from 10° C to 40° C can be explained by the Arrhenius law. Referring to the analyzed mechanical performance at different temperatures, the utilization in shallow geothermal wells can be suggested at temperatures up to 20° C.

Journal or Publication Title: Journal of Porous Media
Journal volume: 19
Number: 3
Publisher: Begell House
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Geothermal Science and Technology
Date Deposited: 21 Nov 2019 12:12
DOI: 10.1615/JPorMedia.v19.i3.30
Official URL: https://doi.org/10.1615/JPorMedia.v19.i3.30
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details