| Title | IEA ECES ANNEX 27 - Quality Management in Design, Construction and Operation of Borehole Systems |
|---|---|
| Authors | Manfred REUSS, Hanne KARRER |
| Year | 2020 |
| Conference | World Geothermal Congress |
| Keywords | Borehole Heat Exchanger, Borehole Thermal Energy Storage, Ground Source Heat Pump, Borehole System Design, Borehole System Construction, Borehole System Operation, Quality Management |
| Abstract | Within the International Energy Agency Technical Collaboration Program ECES an international experts group IEA ECES Annex 27 was founded to elaborate measures and recommendations for quality management in design, construction and operation of systems with borehole heat exchangers like ground source heat pumps and borehole thermal energy storage. The goal is to provide practical experiences from the eleven participating countries in the different project phases for quality management. The goal is to analyze and compile this information for elaboration of guidelines and standards as well as for education of consultants, drillers, installers and operational staff. The results can also be valuable for experts in approval authorities. The information collected for the design phase covers beside some general remarks activities like pre-feasibility study, feasibility study, detailed design, approval procedure and call for tenders. Recommendations on the scope of activities and content of the different steps are given with a focus on the target group consultants. The construction phase looks at legislation, site preparation, drilling, backfilling or grouting process, borehole heat exchangers, start-up and supervision of the construction process. Here the recommendations are targeting mainly for the drillers and installers but are important for the designers and approval authorities also. For the operation phase mainly requirements for monitoring are given, as this is the essential basis for analysis of the system operation and troubleshooting in case of problems. Beside the operational staff as the target group are consultants are important to include consider these aspects already in the design. Practical experiences, which problems and failures can occur, and potential solutions are given as well as recommendations how to avoid them throughout the whole project implementation. |