GREEN GOWN AWARD 2008DALHOUSIE BUILDING

DEREK MITCHELLENERGY MANAGERJUNE 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

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 costs of approx £100,000.

( Life cycle costing exercise )

• The “Risk Factor” - It may not work.

Teamwork

Building User group

Finance

M&E Consultants

University Engineers

Project Q.S .

Project Architect

Project Manager

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