PEMBROKE COLLEGEOpportunities for sustainable improvement

Beate Dirks Kayla Friedman Monica Pianosi

Pavni Sahni Kohli Gassen Sockalingum Daniel Curtis

Facilitators:

Magdalini Makrodimitri Keven Le Doujet Tatiana V. Vakhitova

A Vision for Sustainable Education

• The education experience incorporates the living

environment – a lifestyle education

• Active participation by all members of college-

faculty, students, staff, facility managers

• Transparency and targets for open

communication, discussion, and motivation

Building Environmental Awareness

• Installing an effective monitoring system

• Informing decision-making with the data

• Locate waste of resource

• Creating a low-carbon community

“Once it gets measured, it gets done!”

Chris Blencowe, Bursar of Pembroke College

The monitoring system

• Locate processes with high

energy consumption

=> Apply reusable current

clamps to track the sources of

high energy usage• Technological origin => technological

solution

• Behavioural origin => build

environmental awareness

• Continuously control critical

processes

=> Install stationary metering• i.e. air-conditioning etc.

Data analysis: informing decision-making

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mag-10 giu-10 ago-10 set-10 nov-10 gen-11 feb-11 apr-11

Electricity - cusum difference from mean

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2005/06 2006/07 2007/08 2008/09 2009/10

Mwh per degree day

R2 of DD vs kWh slope

Environmental awareness campaign

• Spread the

word!Pembroke is a

„Green college‟ =>

Attract “Sustainable”

students

• Set up monitors in each

building showing energy

consumption

• Personalised feedback

to staff and students

A low carbon community

• “Green is cool”

• Enhancing current students and staff commitments

• Organise a “Green race”

• Attract

sponsors

• Regular

meeting of

the “Green

club”

Greening the Heat - Research

• Listed buildings!

• Gas = 6067 Mwh/yr

• Gas = 54% CO2 emissions

• For buildings and per person, gas is by far the largest consumed utility.

• At peak, 6/7 gas used for heating, 1/7 hot water

• Meet the English Heritage/CIBSE 4 aims for sustainable historic buildings.

16%

6%

38%

38%

2%Energy Use MwH

Electricity MS

Electricity SP

Gas MS

Gas SP

Vehicles

32%

12%

27%

27%

2%CO2 Emissions

Electricity MS

Electricity SP

Gas MS

Gas SP

Vehicles

Heat – what can be done?

• College provided branded blankets/sweaters

• Foil behind radiators

• Phase change materials

• Tri-Iso or vacuum thin room insulations

• Additional insulation of heat distribution and storage

• Thermal imaging/surveys

• Heat Technologies• Heat recovery systems

• Solar thermal

• Air source heat pumps

• Geothermal heat pumps

• CHP

• Radiant technologies

Geothermal Heat Pump

• 5kw/bore hole @ £5k

• One hole every 10m up to 100m deep

• 53 holes = 265kw @ £265k (1/4 load)

• Darwin College & Architecture have systems

• Water may not be hot enough for purpose

• Electricity needed for pumps

Inverter Combined Heat and Power

• Replace 1 boiler with 2 inverter-based 100kw CHPs that produce 250kw heat each @ £50k/engine (1/2 load)

• Peak electric use = 200kw+ = peak CHP production

• Modulate heat production based on use according to demand

• Possibility of excess electricity if use continues to decrease-ESCo opportunity?

• Gas dependence for life of boiler (~25 yrs)

New Radiant Technologies

• 90% efficiency for

electric heating

• „Warm edge‟ secondary

double glazing

• Room temperature

typically 2° cooler, or

12% reduction of power

• Single room controls

• Electricity dependent

Thank you!

Questions are welcome!