PART L Problem or opportunity?

Bill Wright

Corporate Energy and Environment Manager,

John Lewis plc

John Lewis and Waitrose

• 27 Department Stores

• 179 Supermarkets – and growing

• 3 Factories

• Farm

• Leisure Facilities – including a castle!

ENERGY COSTS

Combined energy bill of over £35M!

OUCH!!!!!!

COST OF ENERGY

• Over the past three years 100% cost increase

• Straight off bottom line

• Now a major overhead

CARING FOR OUR ENVIRONMENT

D

CARING FOR OUR ENVIRONMENT

D

1kwh electricity = 0.43kg CO21kwh gas = 0.19kg CO2

CARING FOR OUR ENVIRONMENT

D

1kwh electricity = 0.43kg CO21kwh gas = 0.19kg CO2

JL Oxford St produces OVER 4000 tons of CO2 each year

And JL Victoria produces OVER 3000 tons

OUR AIMS

• Build efficiently

OUR AIMS

• Build efficiently

• Reduce operating costs

OUR AIMS

• Reduce consumption

• Reduce costs

•Reduce emissions

DOCUMENT L2A

• Applies to new build

• Reduce CO2 emissions

• Improve building performance

• Provide final user information

SERVICES DESIGN

• Design for energy efficiency

• Be aware of new regulations

• Install meters to enable 90% of energy usage to be monitored.

• If over 1000m2 use automatic meter reading

Lighting

• Use efficient lighting sources

HF ballasts, T5, CDMT spotlights etc

• Zone and time controls essential

• Assess lighting level required

• Use natural daylight where possible

• Switch off lights when not required - PIR

ELECTRIC MOTORS

• Use efficient motors

• Use variable speed drives – WHERE PRACTICABLE

• Size motor correctly

• ECA list?

BUILDING MANAGEMENT SYSTEMS

• Can control all building functions.

• Keep it simple!

• They are not the answer to everything!

INFORMATION

• Estimate power consumption.

• Provide customer with good records.

• Energy Log Book?

PART L2B

• Applies to existing buildings and extensions.

• Does not apply if work only involves replacement equipment, or a few additional lights to existing circuits.

CONSEQUENTIAL IMPROVEMENTS!

• Applies to building work associated with an existing building over 1000m2 in area.

• Improvements to original building of 10% of cost of additional work.

• Compliance can be upgrading existing services and / or controls.

• Upgrade lighting if necessary.

RENEWABLE ENERGY

• Requires renewable energy sources to be considered.

• Some local authorities now require a minimum 10% renewable energy sources on site for planning approval.

• Difficult to achieve economically

RENEWABLE ENERGY SOURCES

• Wind power

• Photo-voltaic

• Solar Thermal

• Ground Source heat pumps

• CHP ( Combined heating and power)

• Biomass boilers

ECONOMICS

• None of renewable sources are truly economic

• Assess sources for customer

CONCLUSION

• Gain knowledge of Building Regulations requirements

• Design accordingly

• Be pragmatic

• Commission thoroughly all installations

• Provide all necessary information.

• It is not that difficult!