Seasonal High Temperature Heat Storage with Medium Deep Borehole Heat Exchangers

Heating of buildings requires more than 25% of the total end energy consumption in Germany. By storing excess heat from solar panels or thermal power stations of more than 110°C in summer, a medium deep borehole thermal energy storage (MD-BTES) can be operated on temperature levels above 45°C. Stora...

Full description

Saved in:
Bibliographic Details
Published in:Energy procedia 2015-01, Vol.76, p.351-360
Main Authors: Bär, Kristian, Rühaak, Wolfram, Welsch, Bastian, Schulte, Daniel, Homuth, Sebastian, Sass, Ingo
Format: Article
Language:English
Subjects:
borehole heat exchanger
borehole thermal energy storage
coupled renewable energy systems
geothermal system
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Heating of buildings requires more than 25% of the total end energy consumption in Germany. By storing excess heat from solar panels or thermal power stations of more than 110°C in summer, a medium deep borehole thermal energy storage (MD-BTES) can be operated on temperature levels above 45°C. Storage depths of 500 m to 1,500 m below surface avoid conflicts with groundwater use. Groundwater flow is decreasing with depth, making conduction the dominant heat transport process. Feasibility and design criteria of a coupled geothermal-solarthermal case study in crystalline bedrock for an office building are presented and discussed.
ISSN:1876-6102
1876-6102
DOI:10.1016/j.egypro.2015.07.841