University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm...

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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

Transcript of University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm...

Page 1: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

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

Page 2: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

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

Page 3: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

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

Page 4: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities

Data Gathering;

•Visual Plate Surveys of Motors

•Walkround with Lab Technicians

•Plant Labelling/BMS/

Page 5: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

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

Fan 4/1 (Serves 3rd Floor 318, 320 & 321) 5 7.5 6.75 6.75 24+ 7 3120 5616

Fan 4/5(Serves 1st Floor West End lab 122) 12 7.5 6.75 6.75 24+ 7 3120 5616

Fan 4/7 (Ground Floor Serves G13 North Side) 11 7.5 6.75 6.75 Teaching 3120 5616

Fan 4/3 ( Serves 2nd Floor Lab 229 & 231) 3 7.5 6.75 6.75 24+ 7 3120 5616

Ground Floor AHU 4/4 (AHU No4 - htg only) 15 11 13.5 Teaching 3120 5616

First Floor AHU 4/3 (AHU No3 - htg only) 18.5 14.8 16.65 24+ 7 3120 5616

Second Floor AHU 4/2 (AHU No 2 - htg only) 15 9 9 24 + 7 3120 5616

Third Floor (AHU 4/1 (AHU No1)) 15 15 15 24 +7 3120 5616

Fan 4/2 (Serves 3rd Floor ; 316, 317, 318, 323) 5 7.5 6.75 6.75 24 + 7 3120 5616

Fan 4/8 Phase 4 ( Ground Floor serves g13 south side) 11 7.5 6.75 6.75 Teaching 3120 5616

Fan 4/6 Phase 4 ( 1st Floor serves 122, 117a) 8 7.5 6.75 6.75 24 + 7 3120 5616

Fan 4/4 Phase 4 ( 2nd Floor serves 220,222,229) 10 7.5 6.75 6.75 24 + 7 3120 5616

Fan 2/2 Phase 2 ( 3rd Floor serves 301 east end) 12 8.6 7.74 7.74 24 + 7 3120 5616

Fan 2/4 Phase 2 ( 2nd Floor serves 201, 217 & 353a) 8 8.6 7.74 7.74 24 + 7 3120 5616

Fan 1 Phase 1 ( Ground Floor serves G11 east end) 14 8.6 7.74 7.74 24 + 7 3120 5616

Fan 2 Phase 1 ( 1st Floor serves 106 &107) 9 8.6 7.74 7.74 24 + 7 3120 5616

Third Floor AHU 4 ( - htg only 8m3/s) 15 12 13.5 24 + 7 3120 5616

EFG2 (Serves Phase 2/3 Lab 202 & 207) 7 8.6 7.74 7.74 24 + 7 3120 5616

EFG2 (Serves Lab G11 West End) 14 8.6 7.74 7.74 24 + 7 3120 5616

Page 6: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy 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)

Page 7: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities

Pump Power

Pumps 10/1 & 10/2 140m3/h @13 head   7.5     24 + 7 5736

Served off AHU No 2 Panel - linked to York Chiller   1.5     summer 1440

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 day 2190

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

  Motor OperationAnnual Run

Area ServedDuty (KW) Strategy Hours

Page 8: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy Audit & OpportunitiesCooling Plant

York CWP-CHE-1501 72KW Output   32     summer 1440

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

  Motor OperationAnnual Run

Area ServedDuty (KW) Strategy Hours

Page 9: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities

M&E Plant Electrical Consumption

Page 10: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy Audit & OpportunitiesICT Loads

a     

No of Hours of Operation

No of Hours of Operation Total Hours Annual

Plant REF SYSTEMDUTY(kW) run (w) standy (w) run standy

Of Operation p.a. kwh

Machines B95;21 No @ 300W 6.3         8760 55188

  B95:Networking Equipment 1.5         8760 13140

Machines B108A 22         8760 192720

Machines B130 30         8760 262800

Machines G34A 59         8760 516840

Machines 152A 5         8760 43800

Machines M25A 13         8760 113880

Machines G34D 18         8760 157680

Machines 373 20         8760 175200

Machines G29 5         8760 43800

Machines UBO2 17         8760 148920

  Total 196.8          

Cooling Servers

Cooling for Server Rooms (CoP OF 3) 66         8760 578160

                 

PC'S 2118 No PC's in building 80 35 4380 4380 8330.55 1066837

Monitors 2118 No Monitors at 0.004KW 8.4         6570 55188

Printers Large Photocopier (10 No?) 1000 250 4380 4380 54750

  Small Photocopier (30No?)   120 30 4380 4380   19710

  Laser Printer (140No?)   110 30 4380 4380   85848

        Total       3584461

Page 11: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy 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

Page 12: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities

Lab Equipment

      TotalNo of Hours of Operation

Weeks in Year

Floor Plant REF SYSTEM DUTY(kW) Weekdays Weekends Plant is On

Level 3 Room 302 4 No Fridges        

    2No Mass Specs 3 phase 1      

    2 No Oven Heaters 7      

  Room 301 8 No Glove Boxes        

    5 No fridges        

    1 Ni Oven 1      

    Vacuum Pump for Cupboards 0.5      

  Room 354 Liquid Chromotogrophy        

    Vacuum Pump for Cupboards 0.5      

    fridges 8 No        

Level 2 Room 287 Ice maker 1      

    Freezers 4 No        

    Misc Items 22 No Items 13A 3      

    Radio Chemistry 4 No 13A 3      

    Incubator Shakers 9 No 13A 3 10    

    Centrafuges 2 No 1 20    

    Ovens 4 No 2 100 40 50

Page 13: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy Audit & OpportunitiesHEEPI Lab Toolkit Initiative

LEVEL C  LARGE HEATING

EQUIPMENTLARGE WET / COLD

EQUIP

    Chemical Ovens   Cold Room

    Glassware Ovens   Fridges

    Heating Cabinets   Freezers

    Other   Ice Machines

        Chillers

    SMALL HEATING EQUIP Local 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    

Page 14: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities

Page 15: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities

Opportunity for Zone Presence Detectors on Fume Cupboards

Page 16: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy 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

Page 17: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities

Opportunity for Zone Presence Detectors on Fume Cupboards1 week test, monitoring comparative supply air volumes;

0

500

1000

1500

2000

2500

3000

9.47 9.48 9.49 9.5 9.51 9.52 9.53 9.54 9.55 9.56

Time

Su

pp

ly A

irfl

ow

l/s

Non ZPS

ZPS

Page 18: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Dept of Chemistry – Lensfield RoadEnergy Audit & Opportunities

Opportunity for Zone Presence Detectors on Fume Cupboards

Assumptions;

108 m3/s – total supply air into the building328 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

Page 19: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

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

Page 20: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

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

Page 21: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

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;

Page 22: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Wind Responsive Fume Exhaust – USA Case Study

Page 23: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Wind Responsive Fume Exhaust – USA Case Study

Page 24: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Wind Responsive Fume Exhaust – USA Case Study

Page 25: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

Wind Responsive Fume Exhaust – USA Case Study

Page 26: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

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

Page 27: University of Cambridge Dept of Chemistry – Lensfield Road Energy Audit & Opportunities Malcolm Tait of KJ Tait Engineers Introduction The Utility Challenge.

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

Further Energy Saving Opportunities


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