16/10/2008

Integrated Energy Efficient BuildingDesign and Management

Presented by: Ken Bruton BE MEngSc MIEI

• Bachelors Degree in Civil Engineering• Masters Degree in Building Services (M&T)• RPS Energy Team in Cork• SEI SME Advisor• Commercial Energy Audits• Provide Energy consultancy support to large industry• Implement IS:393 Energy Management Systems• Six Sigma Green Belt• Sit on the SEI working group on Energy Efficient Design

(EED)• Currently writing an EED guideline document for large

industry

My Background

• *Building’s consume 40% of Ireland’s total energy use

*Source: SEI Building Energy Manager’s Resource guide

Building related CO2 Emissions

• More design time required• Lack of communication within design team• Tight budgets and schedules• More emphasis placed on reducing capital costs rather

than reducing subsequent operational costs• Innovative solutions affect multiple facets of the project

cost/timeline• Inadequate space allotted for building services• Possible legal ramifications

Why is EED not utilised extensively?

• Savings potential far higher at design stage• Lower Building operating Costs• Improve comfort and productivity of building

occupants/processes• Improved operational performance due to bespoke

design of equipment and services• Higher lettable floor area due to reduced plant size

Why undertake an IntegratedEED Approach?

• Work from the Energy service back using “DownstreamThinking”

• Challenge design standards• Optimise Control strategies to achieve least energy use

and associated costs• Minimise plant/equipment/floorspace size• Maintain system efficiently through commissioning and

operation

EED Methodology

• Basic/Conceptual Design Phase• Detailed Design Phase• Tendering Process• Construction Process• Commissioning and Management

Typical Design Process

EED Process

• Imperative to the success of the EED process• Senior management commitment required to remove

barriers to success• Ensures EED methodology followed for the duration of

the project by all project participants

Energy Champion

• Diverse project team ensures cross pollination of designimprovements

• Mechanical contractor is a key team member as servicesrequirements a significant energy user on any project

• Contractor should sit on team• Incentivise efficiency improvements

Form Diverse Project Team

• Critical to entire process• Independent Reviewer reporting directly to “Energy Champion”• Usually a specialist but must be knowledgeable of all building

disciplines• Each design decision lifetime costed• Identifies “new” technologies which could be utilised in place of the

standard• Challenges standards or industry norms• Manages communications within the project team• Must be involved from initial design stages

Energy Design Co-ordinator

• Identify potentially high energy using areas/services• Pareto Principle

Basic Parameters affecting Energy Use

• Define each end user requirement• Challenge Design Standards• Effectively zone system in terms of system integration• Consider building orientation and materials in terms of

heat sources/sinks

Minimise Energy ServiceRequirement

• Consider building as a series of interacting systems• Calculate operational costs over lifecycle of building as a

percentage of overall costs• “Downstream” analysis of system• The more efficiency improvements from the energy service back, the

more savings will result

Optimal System Design

• Tailor control strategy to end user requirements• Incorporate occupancy/CO2 control of HVAC systems• Install night-setback of systems if in line with shift patterns• Incorporate zoned/photocell control of lighting• Automate where possible

Optimise Control

• Reduce lifetime costs due to component selection by;– Improving the efficiency of each system component– Reducing energy waste– Recovering waste energy that remains– Changing system technology– Using renewable energy systems in place of conventional systems

Component Selection

• Specify standards used by design team• Specify the minimum requirements of the building in terms of;

– Building Air tightness– Building Element U Values– Rating of motors to be utilised in building services– Minimum lighting efficiency in terms of lumens/watt– Minimum Boiler Efficiency– Control strategy

• Specify a minimum percentage of energy use to be supplied byrenewable technologies

Energy Efficient URS

• EED Project team must be vigilant of;– Value engineering energy efficiency improvements off

the project– Product substitutions due to cost/lead time– Reducing Costs/Staying on Schedule

• Integrate key individuals in each project stage to ensureawareness of energy efficiency decisions already made

• Energy Co-ordinator review imperative at each stage ofproject

Maintain Design Integrity

• Post Occupancy Evaluations (POE)• Verify building services are performing as projected post

commissioning• Ensure building managers are “aware” of performance parameters• Utilise M&T as a means to validate and maintain building

performance

Monitoring & Targeting (M&T)

• Formalised approach to energy management ensures continuousimprovement

• Energy Policy• Significant Energy Using (SEU’s) equipment identified and

monitored• Key performance parameters are documented and rationalised• Key personnel are trained in the efficient operation of SEU’s• Periodic reviews of energy performance ensures continuous

improvement• IS:393 and Energy Maps Programmes run by SEI• Sustained Savings

Energy ManagementSystems

• Achieving client “buy in” can prove difficult• Energy Champion support for Energy Co-ordinator key to success

of EED project• SEI Working group on EED to publish guideline document early

2009

Key Points

16/10/2008

Thank You

Ken Bruton BE MEngSc MIEIKen.Bruton@rpsgroup.com