1. 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

2. University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities 27,000 sq.ft area Built in 1950’s Mixture of under-graduate and post-graduate research Basement to Fifth Floor

3. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Energy Consumption Elec Kwh/m2 Gas Kwh/m2 Energy Cost p.a Carbon Tonnes CO2 p.a University of Cambridge 371336£1.1m7722 University of Oxford 354396-4264

4. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Data Gathering; Visual Plate Surveys of Motors Walkround with Lab Technicians Plant Labelling/BMS/

5. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Fan Power Consumption No of FumeMotorPower Operation Annual RunAnnual Area ServedCupboardsDuty (KW)Standby SettingRun SettingStrategyHours Standby Hours Fan 4/1 (Serves 3rd Floor 318, 320 & 321)57.56.75 24+ 731205616 Fan 4/5(Serves 1st Floor West End lab 122)127.56.75 24+ 731205616 Fan 4/7 (Ground Floor Serves G13 North Side)117.56.75 Teaching31205616 Fan 4/3 ( Serves 2nd Floor Lab 229 & 231)37.56.75 24+ 731205616 Ground Floor AHU 4/4 (AHU No4 - htg only) 151113.5Teaching31205616 First Floor AHU 4/3 (AHU No3 - htg only) 18.514.816.6524+ 731205616 Second Floor AHU 4/2 (AHU No 2 - htg only) 159924 + 731205616 Third Floor (AHU 4/1 (AHU No1)) 15 24 +731205616 Fan 4/2 (Serves 3rd Floor ; 316, 317, 318, 323)57.56.75 24 + 731205616 Fan 4/8 Phase 4 ( Ground Floor serves g13 south side)117.56.75 Teaching31205616 Fan 4/6 Phase 4 ( 1st Floor serves 122, 117a)87.56.75 24 + 731205616 Fan 4/4 Phase 4 ( 2nd Floor serves 220,222,229)107.56.75 24 + 731205616 Fan 2/2 Phase 2 ( 3rd Floor serves 301 east end)128.67.74 24 + 731205616 Fan 2/4 Phase 2 ( 2nd Floor serves 201, 217 & 353a)88.67.74 24 + 731205616 Fan 1 Phase 1 ( Ground Floor serves G11 east end)148.67.74 24 + 731205616 Fan 2 Phase 1 ( 1st Floor serves 106 &107)98.67.74 24 + 731205616 Third Floor AHU 4 ( - htg only 8m3/s) 151213.524 + 731205616 EFG2 (Serves Phase 2/3 Lab 202 & 207)78.67.74 24 + 731205616 EFG2 (Serves Lab G11 West End)148.67.74 24 + 731205616

6. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Fan Energy 108 m3/s supply air 328 No fume cupboards 3,273,348 kWh p.a £283,500 p.a (fan energy)

7. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Pump Power Pumps 10/1 & 10/2 140m3/h @13 head 7.5 24 + 75736 Served off AHU No 2 Panel - linked to York Chiller 1.5 summer1440 5 No Pumps each at 1kw, but only 1 running 1 5736 1 No Pump (not running) 1 5736 2 No 11/1 & 11/2 7.5 6 hrs a day2190 P1 (Running) 5.5 5736 P2 (Running) 5.5 5736 P3 (Running) 5.5 3120 P4 (Running) 5.5 3120 P5 (Not Running) 0 0 P6 North Wing 11 8760 P7 South Wing 11 8760 P8 East Wing 11 8760 P9 ? Lab 287 0.2 5736 G51 AHU Run around pump 2 5736 0.4 5736 4th Floor Plant Room P1 &P2 3 5736 4th Floor Plant Room P1 &P2 (CHW) 5.5 5736 MotorOperation Annual Run Area Served Duty (KW)StrategyHours

8. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Cooling Plant York CWP-CHE-1501 72KW Output 32 summer1440 2 No on Roof Carrier CWP-CHE-002 200 2190 Chiller B cw/ph7/02 25 1440 Chiller C (4TH Floor Plantroom) CH/PH7/01 25 1440 Chiller A (4th Floor Plantroom)CH/PH7/01 25 1440 Total 1527kW Cooling Capcity delivered by 263 No Units Less ICT Cooling at 200kW = 1327 Kw (CoP OF 3) 442 960 Total M&E Power MotorOperation Annual Run Area Served Duty (KW)StrategyHours

9. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities M&E Plant Electrical Consumption

10. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities ICT Loads a No of Hours of Operation Total HoursAnnual Plant REFSYSTEM DUTY(k W)run (w)standy (w)runstandy Of Operation p.a.kwh MachinesB95;21 No @ 300W6.3 876055188 B95:Networking Equipment1.5 876013140 MachinesB108A22 8760192720 MachinesB13030 8760262800 MachinesG34A59 8760516840 Machines152A5 876043800 MachinesM25A13 8760113880 MachinesG34D18 8760157680 Machines37320 8760175200 MachinesG295 876043800 MachinesUBO217 8760148920 Total196.8 Cooling Servers Cooling for Server Rooms (CoP OF 3)66 8760578160 PC'S2118 No PC's in building 80354380 8330.551066837 Monitors2118 No Monitors at 0.004KW8.4 657055188 PrintersLarge Photocopier (10 No?) 10002504380 54750 Small Photocopier (30No?) 120304380 19710 Laser Printer (140No?) 110304380 85848 Total 3584461

11. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities HEEPI Input Data Power of client in active/idle mode (Watts) 79 Power of client in standby mode (Watts) 4 Power of monitor in active/standby mode (Watts) 35 Power of monitor in standby mode (Watts) 2

12. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Lab Equipment Total No of Hours of Operation Weeks in Year FloorPlant REFSYSTEMDUTY(kW)WeekdaysWeekendsPlant is On Level 3Room 302 4 No Fridges 2No Mass Specs 3 phase1 2 No Oven Heaters7 Room 3018 No Glove Boxes 5 No fridges 1 Ni Oven1 Vacuum Pump for Cupboards0.5 Room 354Liquid Chromotogrophy Vacuum Pump for Cupboards0.5 fridges 8 No Level 2Room 287Ice maker1 Freezers 4 No Misc Items 22 No Items 13A3 Radio Chemistry 4 No 13A3 Incubator Shakers 9 No 13A310 Centrafuges 2 No120 Ovens 4 No21004050

13. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities HEEPI Lab Toolkit Initiative LEVEL C LARGE HEATING EQUIPMENT LARGE WET / COLD EQUIP Chemical Ovens Cold Room Glassware Ovens Fridges Heating Cabinets Freezers Other Ice Machines Chillers SMALL HEATING EQUIPLocal DI Water Heating mantles Water Stills Hot Plates Glass Washers Heater / stirrers Ultrasonic Baths Melting Point Aperatus Other Water Baths Rotary Evaporators Sonicators Sublimation Aperatus Heat Gun Microwave Reactor Bunsen Burners Incubators

14. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities

15. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Opportunity for Zone Presence Detectors on Fume Cupboards

16. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Opportunity for Zone Presence Detectors on Fume Cupboards 112 Lab – 9 No fume cupboards - no zps Melville Lab – 10 No fume cupboards - with zps

17. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Opportunity for Zone Presence Detectors on Fume Cupboards 1 week test, monitoring comparative supply air volumes;

18. Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Opportunity for Zone Presence Detectors on Fume Cupboards Assumptions; 108 m3/s – total supply air into the building 328 fume cupboards @ 300l/s – 98m3/s Best case – install ZPS in all fume cupboards to reduce air volume by 50% Assume reduce supply fan power consumption by 33% - 454,545 kwh p.a - £39,363.00 Assume heat reduction for 50m3/s p.a;- 3,153,600 kwh p.a - £69,379 Total Potential Saving- £108,742 p.a

19. Dept of Chemistry – Lensfield Road Energy 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 mode All year - -switch off fume cupboards outwith term, saving of £20k Review ICT Cooling Strategy Review Split A/C Strategy Metering of Laboratory Equipment

20. Dept of Chemistry – Lensfield Road Energy 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

21. 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;

22. Wind Responsive Fume Exhaust – USA Case Study

26. 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

27. Opportunity for Wind Responsive Fume Exhaust Control; Assumption that every fume exhaust fan achieves a 33% reduction In 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 Further Energy Saving Opportunities