zae bayern techniken für energiesysteme und erneuerbare energien dipl. phys. manfred reuß 05/2012...

ZAE BAYERN

Techniken für Energiesysteme und Erneuerbare Energien

Dipl. Phys. Manfred Reuß 05/2012

IEA ECES ExCo 15.05.2012 in Lleida

IEA ECES Annex 27 „Quality Management in Design, Construction and Operation of Borehole Systems“

Proposed by: Manfred Reuss, Bavarian Center for Applied Energy Research,

Germany

Learn from experiences, don’t make a mistake twice!

ZAE BAYERN



IEA ECES ExCo 15.05.2012 in Lleida2

Background 1/3

We face a fast growth of BTES and BHE for ground source heat pumps (in some countries up to 30,000 systems/a)

The field of application covers a wide range

• family homes – heating or cooling

• commercial buildings – heating and/or cooling

• large BTES for seasonal storage of heat (e.g. in solar district heating systems, cogeneration …)

Result:

• increasing number of market players, some with lack of experiences

• more projects with problems

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Background 2/3

regulatory bodies like the water authorities become more and more concerned and restrict their approvals

It is important to control and improve the quality in all project phases:

• design

• construction

• operation (maintenance)

Remark:

Annex 13 covered quality management issues for drilling about 10 years ago. Meanwhile we have a significant development in drilling techniques and new materials

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Background 3/3

We have now industry in the market which provides different semi-finished products like:

• prefabricated and tested piping

• spacers

• manifolds

• grouting mixtures of monitored quality

• special mixers

• special pumps

• …

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Scope and Objectives

• Describe national design procedures and construction methods for BTES/BHEx for heating and cooling

• Identify related problems in order to establish further R&D

• Work out a handbook and guidelines for design and construction

• Investigate operational failures and work out preventative guidelines for monitoring, maintenance and rehabilitation measures

• Provide information for regulatory bodies like guideline committees and standardization organizations

• Provide information for education of drillers

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Relevant Contributors

Each country should form a national team of experts of:

• scientists

• consultants

• approving authorities

• construction companies, drillers

• educational institutions

• …

The national teams serve as multipliers to transfer information from and to relevant groups.

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Topics 1/2

Design process

• data collection

• site investigation (TRT,…)

• geometry of BHEs

• pipe material selection

• proper grouting material

• type of antifreeze

• operational aspects (working temperature, pressure, flow rate,…)

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Topics 2/2Construction

• site preparation

• Drilling

• prefabricated pipes

• insertion of piping

• grouting

• testing of installation (leakage,…)

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Topics 3/2

Start-up • functional check

Operation• supervision of operation• influence on ground water

Problems, failures, investigation and solution• pipe leakage• pipe clogging• problems from poor grouting

Environmental assessmentmicro-sensor for inspection of piping

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Area of Activities

The Annex will be organized in subtasks which are related to the above mentioned topics:

• Subtask 1: Design Phase • Subtask 2: Construction Phase • Subtask 3: Operation Phase

All relevant groups involved of the participating countries should contribute and share their knowledge

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Outcome

It will be more detailed than regular guidelines!

environmental assessment (risk analyses for potential damage)

• common problems with BHE and BTES

• detailed analyses and description how to avoid and how solve them

• best practice handbook

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Results

• Periodic documents and interim progress reports achieved within the annex

• Presentations on national conferences and exhibitions• Results will be documented in a handbook for design and

construction• Results and documentations will be distributed within the

national teams to the relevant contributors (scientists, consultants, construction companies, approving authorities, educational institutions,…)

• Organizing of workshops and conferences preferably in connection with national events

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Funding

• Each participating country should at least devote a minimum of 3 man months per year and funding for travelling for the expert

• Each participating country should provide funding for the national teams to collect and transfer the information and results to the relevant groups

• The operating agent should devote 6 man months per year to the work in the annex

• Germany may provide within a proposed research project related to quality management for BTES the Operating Agent

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Time Frame and Interested Countries

Time frame: 3 years

Semi-annual experts meetings will be held hosted by the different participating countries

Interest was indicated from:

China, Italy, Norway, Finland, Canada, Japan, Germany, Spain, Netherlands, USA, Austria

potentially interested: Turkey, Belgium, Korea, Sweden, Slovenia, Denmark, France, UK, Newzeland

zae bayern techniken für energiesysteme und erneuerbare energien dipl. phys. manfred reuß 05/2012...

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