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GREEN GOWN AWARD 2008 DALHOUSIE BUILDING DEREK MITCHELL ENERGY MANAGER JUNE 2009 GREEN GOWN AWARD 2008 DALHOUSIE BUILDING DEREK MITCHELL ENERGY MANAGER JUNE 2009

The Project • Take a previously untapped source of heat from our CHP Plant The Project • Take a previously untapped source of heat from our CHP Plant and use it to provide most of the heat required for our new Dalhousie building. • 3 heat exchangers were fitted in the lubricating oil circuit of the 3 Jenbacher CHP engines providing low grade heat at 47/37 deg C flow and return temperatures. • Run over 150 metres of 125 mm ID flow and return Pipe 2000 plastic pipework between the Boilerhouse and Dalhousie Building. • Plant within the Dalhousie building was oversized to accommodate the lower design temperatures.

Other Environmental Features • Air conditioning in only one Lecture theatre controlled by CO Other Environmental Features • Air conditioning in only one Lecture theatre controlled by CO 2 detector • Natural ventilation in all other rooms • Solar shading • Enhanced U Values • Lighting control systems • Inverter drives on air handling plant • Power factor correction

Secrets of our Success • Innovation • Determination • Teamwork • Post-Evaluation Secrets of our Success • Innovation • Determination • Teamwork • Post-Evaluation

Innovation 1976 – District heating scheme 1997 – 3 MW combined heat & power Innovation 1976 – District heating scheme 1997 – 3 MW combined heat & power plant 1998 - Free Cooling Air Blast Radiator System 2000 – Building Energy Management System 2001 – Micro CHP 2007 – Absorption Chiller (Tri-Generation)

Determination to overcome barriers • Additional space requirements for oversized plant. • Additional financial Determination to overcome barriers • Additional space requirements for oversized plant. • Additional financial costs of approx £ 100, 000. ( Life cycle costing exercise ) • The “Risk Factor” - It may not work.

Teamwork Project Architect Project Q. S. Building User group Project Manager University Engineers Finance Teamwork Project Architect Project Q. S. Building User group Project Manager University Engineers Finance M&E Consultants

Post-Evaluation Meter Performance Review results Re-commission Plant Post-Evaluation Meter Performance Review results Re-commission Plant

Headline Benefits • 60 % of teaching block heated from VLTHW Circuit. • Financial Headline Benefits • 60 % of teaching block heated from VLTHW Circuit. • Financial savings of £ 15, 000 p/a • Annual CO 2 savings of over 100 tonnes p/a from VLTHW Circuit alone.

Additional Future Benefits • Carbon Standard • Climate Change Declaration • Carbon Management Programme Additional Future Benefits • Carbon Standard • Climate Change Declaration • Carbon Management Programme • Carbon Reduction Commitment

Not only CHP • Wind Turbine • Ground Source Heat Pump • Solar Panel Not only CHP • Wind Turbine • Ground Source Heat Pump • Solar Panel Installation • Heat Recovery • Voltage Optimisation

Dalhousie Building Dalhousie Building

Dalhousie Building Entrance Dalhousie Building Entrance

Entrance Foyer Entrance Foyer

Lecture Theatre – Mechanical Ventilation Lecture Theatre – Mechanical Ventilation

Plantroom VLTHW Heat Exchanger Plantroom VLTHW Heat Exchanger

Energy Performance Certificate Energy Performance Certificate