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 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 125mm 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 CO2 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

Innovation 1976 – District heating scheme 1997 – 3 MW combined heat & power plant 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 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 Manager Project Architect Project Q.S. University Engineers M&E Consultants Finance Building User group

Post-Evaluation Review results Re- commission Plant Meter Performance

Headline Benefits 60 % of teaching block heated from VLTHW Circuit. Financial savings of £15,000 p/a Annual CO2 savings of over 100 tonnes p/a from VLTHW Circuit alone.

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 Installation Heat Recovery Voltage Optimisation

Dalhousie Building

Dalhousie Building Entrance

Entrance Foyer

Lecture Theatre – Mechanical Ventilation

Plantroom VLTHW Heat Exchanger

Energy Performance Certificate