Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14279/15749
Title: Performance and cost analysis of single and double U-tube ground heat exchangers
Authors: Christodoulides, Paul 
Zerun, Mateusz 
Aresti, Lazaros 
Kalogirou, Soteris A. 
Major Field of Science: Engineering and Technology
Field Category: Electrical Engineering - Electronic Engineering - Information Engineering
Keywords: Vertical U-tube ground;heat exchangers
Issue Date: 2019
Source: SIAM-GS 2019 Conference on Mathematical & Computational Issues in the Geosciences
Conference: Conference on Mathematical & Computational Issues in the Geosciences 
Abstract: Vertical U-tube ground (or borehole) heat exchangers (GHEs) are widely used as shallow geothermal energy systems to achieve sufficient heat exchange capacity under a confined surface area. This is possible because the temperature below a certain depth remains constant over the year. The presence of more than one U-tubes in the GHE in a single borehole may increase the efficiency of the system. It is hence of interest to study the performance of such systems in relation to their manufacturing/installation costs. The scope of this study is to compare the energy behavior of a single U-tube GHE with a double one. The performances of two such systems, installed under similar ground characteristics, are studied via a Building Management System for a certain time period. The energy dissipated in the ground is obtained by measuring/considering mass, specific heat capacity and temperature difference in the system. Then, a CFD model based on the convection-diffusion equation and transient time analysis is validated through the installed systems. The numerical model allows for parametric analyses and comparisons of the two systems, leading to a cost analysis.
URI: https://hdl.handle.net/20.500.14279/15749
Type: Conference Papers
Affiliation : Cyprus University of Technology 
Publication Type: Peer Reviewed
Appears in Collections:Δημοσιεύσεις σε συνέδρια /Conference papers or poster or presentation

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