ground source heat installations - learning experiences
Post on 14-Dec-2014
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for life in buildings
CIBSE National Conference 2009 Ground source heat installations: learning experiences
Presented by Paul Hancock, Divisional Technical Director
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Solais House - NG Bailey Central Scotland Office A Case Study
• The Client Brief
• Why Ground Source
• Systems & Equipment choices
• Site investigation and analysis
• Installation
• Integration
• Delivery Outcomes and Learning
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The Client Brief – a BREEAM excellent building
• For Life in Buildings• Future proofing our own estate• Corporate Social Responsibility• Integrating innovative technologies• Working environment• Collaborative working
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Why Ground Source
•Appropriate LZC choice
•BREEAM Pre-assessment - Zero Nox heating system
•Well insulated and airtight structure
•Avoidance of refrigerants within the building
•Demonstration of the technology
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Equipment and system choices
• Horizontal, or vertical, closed or open• Site constraints• Specialists• Equipment suppliers• Choice of heating and cooling systems• iBEMS integration
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Initial Investigations
• Desk Studies– British Geological Survey– NCB– Mines report– Hydrogeologist
• Site Visit• Removal of spoil heap and site profiling• Test bore• Pump test
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System Schematic
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Drilling
• Extension of test bore BH1• Drilling of second bore BH2• Equipment types• Final termination
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Site Analysis
• Pump tests• Hydro Geology• Water quality• Final scheme• SEPA licensing process
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Server room cooling
• Preliminary Assessments• Measure existing installations• Establish actual diversity• Review equipment installed• Use latest technologies• Provide free-cooling served from
the GSHP system• Incorporate PCM in construction• Monitor the outcome
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Delivery Outcomes
• Final BREEAM assessment
– Excellent rating 78.98%
• Energy Performance Certificate
– A rating (Scotland)
• % Renewable’s - 43%
• 13kg/CO2/m2/annum
• Air Leakage - 2.87m3/s/m2 @ 50pa
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Key learning
• Working in the ground• Early site investigation• Integration• Prefabrication• Licensing process• Choice of partners• Understanding and knowledge
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Conclusions
• Sustainability in general and Ground Source Heat Pumps specifically are a commercial reality because of increasing energy costs, customer demand/brand perception and Government legislation
• Building services, embracing ICT and M&E capabilities, are critical to achieving the new commercial realities of construction
• The commercial benefits of sustainability are increased asset value, reduced operating costs, and improved staff retention/workrate
• The Ground Source Heat Pump system at Solais House is a demonstration of this approach which can be seen and touched
• The commercial benefits can be measured and monitored
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Thank you for listening
Any Questions?
www.ngbaileycentralscotland.co.uk
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