IEQ vs energy - it starts with the napkin | Healthy buildings 2012
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Energy conservation vs IEQ | HVAC .....it all starts with the napkin Phil Wilkinson Chief Executive Officer AIRAH
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Transcript of IEQ vs energy - it starts with the napkin | Healthy buildings 2012
Energy conservation vs IEQ | HVAC.....it all starts with the napkin
Phil WilkinsonChief Executive OfficerAIRAH
No longer allowed
Less than ideal
We don’t want this
We don’t want this
Consider maintenance at day one
Sustainability checklistLifecycle costsEnergy useWater useNoiseRefrigerant applicationMaintainabilityCommissionabilityReliabilityMonitoring and meteringSystem optimisation and tuning (ability)Indoor environment qualityExternal environmental impactsMaterials and embodied energiesConsumables and future accessDocumented sustainability features
Many considerations – IEQ and energy only two of them
Maintenance objectivesThe owners’ objectives for maintenance policy can include:• Return on investment• Asset protection and enhancement• Legal compliance• Health and safety• Building sustainability• Indoor environment quality• Risk management• Cost limitations• Marketing• Corporate image.
Only two parts to consider in the process
Maintainability - Design
• Simple• Reliable• Sustainable• Fit for purpose• Provide required function
System designers are best placed to develop design / maintenance philosophy
Access is king – do it right
Access is king
• Good access is essential to allow plant to be maintained easily and safely.
Commissioning• Optimised system performance.• Lower operating costs.• Better indoor environment quality.• Reduced risk.• Reduced downtime.• Better system knowledge.• Better data for maintenance management.
OperationEnergy Efficiency maintenance
Energy management is a continuous process• Audit• Strategy• Improvements
– optimal stop/start,– load reset on variation in outdoor air temperature,– greater use of sub metering,– air handling system rebalancing,– recalibration of controls,– dampers repaired,– reducing maximum demand,– heat reclaim,– reset cooling and heating fluid temperatures.
OperationIAQ maintenance
• Maintenance contributes to IAQ• Step one – establish IAQ policy• Step two – develop IAQ management system• Step three - improvements
– Outdoor air ventilation rates– Application and maintenance of air cleaning devices– Air handling unit and duct cleanliness– Air distribution and balancing– Air analysis and assessment– Recirculation rate, air change rate– VAV terminal unit settings and operation.
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Summary
•Napkin•Design•Install•Commission•Handover•Operate
...with maintenance in mind
