National Trust energy approachesNational Trust energy approaches

–http://www.nationaltrust.org.uk/main/w-energy-report-2010.pdf

2009 2015

10,000Mwh pa

National Trust (Wales) energy targets

Why is a mansion like a cow?

PUT PUT PUT

The EPC story

Experience in energy

What’s happening?

Maintain

Identify opportunities and prioritise – Plan of Attack

Where were we starting from?

20092009

128,000ltrs of oil pa

1500ltrs pd in winter

1,200,000Kwh pa

300,000kwh of electricity

Site audit

Specialist survey

Maintenance contract

Optimisation

BMS strategy

Overhaul boiler

Dynamic heat loss model

Hand dryer trial

Full biomass feasibility

Heat pump pre feasibility

Roof insulation

Staff trainingFlange insulation

Low heat dynamic model

Detailed M&E assessment and room by room heat loss

Heat pump full feasibility

Secondary glazing

Hand dryer rollout

LED lighting

50kw PV instillation

Smart metering

Heat pump design and EIA

Sub metering, meter monitoring

Hydro pre feasibility

Staff training

Site re audit

New heat main and zonal design

Conservation LED lighting

Marine source heat pump instillation

Wind turbine feasibility

New heat main

Localised solar thermal

Improving shutters and curtains

Visitor centre heating - ASHP

Fabric insulation – tea room

Typical property energy approach –

Plas Newydd 2011

Focusing on the basics can yield big results

Show and tell - typical old house

Windows

–Do they shut properly?

–Does the window frame fit?

–How loose are the sashes?

–Are curtains used?

–Are they lined?

–Shutters

–Secondary glazing

–Changing to double glazed panels?

Insulation – is it that simple?

• Roof, wall, floor, door…?• Access?• Fire and Insurance• Insects and durability• Ease of future access• Cost• Sustainability• Freezing pipes• Electrical cables?• Condensation

• Oh yes and ‘What’s it like for vacuuming bat poo off’?

Yes it is… ish?

9kw high heat CO2 air source heat pumps currently on trial.

• Options for viable, low energy heating and hot water technology to replace the many thousands of oil based heating systems the NT have across their estate.

• Ability to retrofit on to the existing heating system.

Voltage optimisation

Air-to-air heat pump•Replaces storage heaters

•Cheap to install

First Lower the load. Then work out how

much you need

Lessons

–Appropriateness and compromise

Training and commitment

300kw of Photovoltaics (PV)

Detailing

Sharing is key

www.ntenvironmentalwork.net