Ground Source Heat Installations - Learning Experiences

1

for life in buildings

CIBSE National Conference 2009 Ground source heat installations: learning experiences

Presented by Paul Hancock, Divisional Technical Director

2

for life in buildings

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

3

for life in buildings

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

4

for life in buildings

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

5

for life in buildings

Equipment and system choices

• Horizontal, or vertical, closed or open• Site constraints• Specialists• Equipment suppliers• Choice of heating and cooling systems• iBEMS integration

6

for life in buildings

Initial Investigations

• Desk Studies– British Geological Survey– NCB– Mines report– Hydrogeologist

• Site Visit• Removal of spoil heap and site profiling• Test bore• Pump test

7

for life in buildings

System Schematic

8

for life in buildings

Drilling

• Extension of test bore BH1• Drilling of second bore BH2• Equipment types• Final termination

9

for life in buildings

Site Analysis

• Pump tests• Hydro Geology• Water quality• Final scheme• SEPA licensing process

10

for life in buildings

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

11

for life in buildings

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

12

for life in buildings

Key learning

• Working in the ground• Early site investigation• Integration• Prefabrication• Licensing process• Choice of partners• Understanding and knowledge

13

for life in buildings

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

14

for life in buildings

Thank you for listening

Any Questions?

www.ngbaileycentralscotland.co.uk