University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers ntroduction The Utility Challenge M & E Power Consumption ICT Power Consumption Laboratory Power Consumption Opportunities for Energy Reduction
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University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities
University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers. Introduction The Utility Challenge M & E Power Consumption ICT Power Consumption Laboratory Power Consumption Opportunities for Energy Reduction. - PowerPoint PPT Presentation
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University of CambridgeDept of Chemistry – Lensfield RoadEnergy Audit & Opportunities
Malcolm Tait of KJ Tait Engineers
Introduction
•The Utility Challenge
•M & E Power Consumption
•ICT Power Consumption
•Laboratory Power Consumption
•Opportunities for Energy Reduction
University of CambridgeDept of Chemistry – Lensfield RoadEnergy Audit & Opportunities
•27,000 sq.ft area
•Built in 1950’s
•Mixture of under-graduate and post-graduate research
•Basement to Fifth Floor
Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities
Energy Consumption
Elec
Kwh/m2
Gas
Kwh/m2
Energy Cost p.a
Carbon
Tonnes CO2 p.a
University of Cambridge
371 336 £1.1m 7722
University of Oxford
354 396 - 4264
Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities
Data Gathering;
•Visual Plate Surveys of Motors
•Walkround with Lab Technicians
•Plant Labelling/BMS/
Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities
Fan Power Consumption
No of Fume Motor Power Power Operation
Annual Run Annual
Area Served Cupboards Duty (KW) Standby Setting Run Setting Strategy HoursStandby Hours
Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities
Other Potential Opportunities;
LPHW Pumps at constant volume all year - change AHU’s to 2-port control- potential saving of £12k p.a
Undergraduate labs run in setback modeAll year - - switch off fume cupboards
outwith term, saving of £20k
Review ICT Cooling Strategy
Review Split A/C Strategy
Metering of Laboratory Equipment
Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities
Other Opportunities
•Record Documentation Collated
•Common Referencing of Plant
•The Need for a Building Log Book – collate design intent
•Improved metering of AHU’s power consumption
•Lab equipment – asset register- meter
Further Energy Saving Opportunities
Adjust exhaust fan speed to reflect current wind conditions;
-Reduce fan speed when wind speed is slow-Increase fan speed when wind speed is fast
Wind Responsive Systems Work Best When;
-low required building flows-high frequency of low wind speeds-directional conditions
Opportunity for Wind Responsive Fume Exhaust Control;
Wind Responsive Fume Exhaust – USA Case Study
Wind Responsive Fume Exhaust – USA Case Study
Wind Responsive Fume Exhaust – USA Case Study
Wind Responsive Fume Exhaust – USA Case Study
Opportunity for Wind Responsive Fume Exhaust Control;
The Process;
•Measure current fume exhaust outlet velocities•Commission wind tunnel simulations for reduced velocities against a range of wind conditions•Undertake physical visualisation tests to validate results •Re-commission fan control strategy
Cost of Process - £60k
Further Energy Saving Opportunities
Opportunity for Wind Responsive Fume Exhaust Control;
Assumption that every fume exhaust fan achieves a 33% reductionIn energy consumption as a result of a wind responsive control regime;
Annual saving in energy – 652027 kwh p.a.Annual cost saving - £56,456.00 p.a