ground source energy expo 2015 - renewable heat · 2017. 4. 1. · ground source energy expo 2015...
TRANSCRIPT
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Ground Source Energy EXPO 2015
Commercial GSHP installation
Matthew Evans – Technical Director TGE Group
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From Design to Installation
Delivering the project as designed
• Size doesn’t matter!
• Critical for all the information contained within the design to be fully delivered to the
installation contractor/company
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From design to installation
Some common mistakes, omissions and misunderstandings• Value engineering which can lead to inferior installation practice, products or both
• Installation engineers unfamiliar with GSHP
• Commissioning valves should not only being installed but fully understood
• Effective air elimination and dirt separation devices in the heating and ground circuits
• Correct system flushing and treatment
• System not commissioned correctly
• Thermal response test not performed correctly or at all
• Borehole caps not clearly identified and protected
• Electrical demands not fully understood
• Recording of underground services
• BMS integration
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What can go wrong
• Open loop filter system incorrectly installed
• Bore holes not drilled deep enough
• Poor ground contact – poor grout or backfill practice
• Building demands are not met
• Poor performance
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Managing the project
• The heat pump is part of every element of the build and early involvement is essential
• Changes in design will happen and need to be communicated and discussed
• Experienced project manager is recommended
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The Installation
1. Health & Safety2. Internal Installation3. External installation4. Commissioning5. Handover
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Health & Safety
• Construction Phase Plan• CDM for direct contract• RAMS• Trained personnel and sub contractors• Civil works • Refrigeration handling
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Internal Installation
• Consider – Plant room space
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Internal installation
• Buffer tanks – Heating and cooling configuration• Anti vibration mats & couplings for heat pumps and circulation pumps• Spill tanks or expansion tanks & pressurisation units• Pipe and valve insulation – condensation • Pipe types and fixing methods• System flushing• Refrigeration – Is a room detector required
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External installation
PE pipe specification and connection method• Colour • Thickness• Quality• Bore hole loops• Connection method
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External installation
• Borehole construction
• Installation of horizontal collectors
• Installation of surface water collectors
• Backfill for horizontal system & ID
• Insulation of flow or return & services
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External installation
Trenching methods
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External Installation
Drilling
• Choose a drilling contractor with care
• Drilling can be a messy business
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External Installation
Manifold Chambers
• Should be one piece or in a sealed chamber where possible
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Commissioning
• Pre‐commission, commission and post commission
• System flushing and purging heating and ground side pipework
• Biocide treatment• System flow rate setting• BMS and remote communication• Testing and sign off
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Thank you