A Comprehensive Approach to Energy Management for Hotels & Resorts. PRESENTED BY: ROBERT GREENWALD, PEng, MBA May 18, 2011

Transcription

1 A Comprehensive Approach to Energy Management for Hotels & Resorts PRESENTED BY: ROBERT GREENWALD, PEng, MBA May 18,

2 A Comprehensive Approach to Energy Management Continuous Improvement 2

3 Energy Management Technical Aspects 3

4 A Technical Approach: The Seven Steps 1. From the point of Purchase Understand Present Usage 1. Understand Costs 7. Optimize Supply 3. And, back to the point of Purchase (or supply) 2. Compare Yourself 6. Maximize Efficiency 3. Understand When 5. Eliminate Waste 2. To the point of End-Use 4. Understand Where Find the Savings Opportunities 4 Source: NRCan Dollars to $ense Workshop

5 Step 1Understand Cost Electricity Demand ($/kw or KVA) Energy ($/kwh) Natural Gas Supply ($/m3 or $/GJ or lbs steam) Delivery ($/m3 or $/GJ) Contracted Daily Demand ($/m3/day) What is the incremental cost? The next unit used or saved How about Carbon Taxes, fees, HST 5

6 Step 2 Sector Benchmarks & Good/Best Practices Source: 6

7 0:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00 23:00 0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 kilowatts (kw) kilowatts (kw) :00 6:00 12:00 18:00 0:00 6:00 12:00 18:00 0:00 6:00 12:00 18:00 0:00 6:00 12:00 18:00 0:00 6:00 12:00 18:00 0:00 6:00 12:00 18:00 0:00 6:00 12:00 18:00 kilowatts (kw) kilowatts (kw) Demand Profiles for: ACUTE CARE Peak Demand: kw on a 15 minute interval. Step PF 3 at Peak: Daily 0% Interval Profiles When: 7/9/07 10:45 AM Sun Mon Tue Wed Thu Fri Sat Overview Profile kw Week Around Peak kw Time / Date Time / Date Integral of Overview Period Energy 1,052,289 kwh 26-Jun-07 to 26-Jul-07 Integral of Peak Week Energy 247,285 kwh 08-Jul-07 to 14-Jul-07 Day of Peak kw 3 Days - Around Peak Day kw Time / Date Time / Date Integral of Peak Day Energy 40,202 kwh 09-Jul-07 Integral of 3 Days Energy 113,988 kwh 08-Jul-07 to 10-Jul-07 7

8 Step 4 Understand Where Your Buildings Use Energy Focus your efforts Establish a basis for savings calculations Source: 8

9 Step 5 Eliminate Energy Waste Match the Need Turn it off Lights, fans, pumps, conveyors Compressed air leaks Steam traps Turn it down Temperature, water & air flow Compressed air & steam pressure & flow Control it Exhaust / make-up air balance Light levels 9

10 Step 6 Maximize Efficiency Filters and lubrication Clean heat exchangers, pipes, ducts and coils Motor conditions voltage & cooling Combustion efficiencies Sequence compressors, pumps and fans Equipment replacement (boilers, chillers, rooftop units) 10

11 Step 7 Optimize Energy Supply Heat recovery Renewable energy Solar PV Solar thermal On-site generation Revised supply contracts 11

12 EMOs in Energy Consuming Systems Eliminate Waste Establish Need Increase Efficiency Optimize Supply 12

13 Hotel Examples Waste, Efficiency and Supply 13

14 Economizer Program for Tower Air Handlers Cost Savings: $4,000 / yr Situation: mechanical cooling when opportunity for free cooling Measure: program to modulate the outside and atrium air dampers 14

15 Chilled Water and Condenser Water Supply Temperature Setpoint Reset Situation: Chilled water supply temperature fixed at 5C, condenser water supply temperature fixed at 26C. Measure: Chilled water system efficiency improvements by raising chilled water temperature (based on valve position), and lowering condenser water temperature (based on OAT). Cost Savings: $5,000 / yr 15

16 Water Side Economizer Situation: Hotel has a year-round requirement of chilled water. Chiller operating inefficiently at low load conditions. Measure: Install a plate-and-frame heat exchanger to generate chilled water using the cooling tower in the winter. Allows for chiller to be shut off. Energy usage of cooling tower fans is far less than chiller. 16

17 Pool Humidity Control Situation: fresh air brought in to control humidity. Humidity sensor error, coupled with low setpoint (45%) result in excessive fresh air requirements. Measure: increase humidity setpoint to 60% and re-calibrate humidity sensor Cost Savings: $6,200 / yr 17

18 Install Pool Dehumidifier for Pool Heating Situation: Humidity in pool air provides opportunities to heat pool water Measure: Install pool dehumidifier (heat pump recovering latent energy) to pre-heat pool water, on facility roof due to space constraints. Cost Savings: $11,400 / yr 18

19 Reduce Run Hours of Slide Pump & Install VFD Situation: Pool water slide pump operates continuously and flow is excessive, requiring throttling. Throttling at the outlet is energy-inefficient. Throttling at the inlet can damage the pump (cavitation). Occ. Sensor to turn on pump Measure: Install occupancy sensor and Variable Frequency Drive Cost Savings: $1,400 / yr VFD runs at a reduced speed to match flow requirements 19

20 Integrate Room Booking System with DDC Situation: 200 rooms conditioned continuously to 18 C to 28 C setpoints. Measure: Put empty rooms in unoccupied setback mode by integrating room booking system with DDC 20

21 Implement a Key Card Energy Control System for Hotel Rooms Situation: Additional savings possible through key card energy control system. Measure: Occupant insert key cards to activate switch. Linked to the DDC system and puts room into occupied mode. 21

22 Banquet or Conference Hall Air Handler Control Optimization Situation: Air handling systems have demand control ventilation, but CO 2 sensor reads 2,000 ppm continuously, resulting in 100% fresh air brought in and heated/cooled. Schedules also found to be excessively long. Measure: Re-calibrate CO 2 sensor and trim operating hours. Cost Savings: $3,600 / yr 22

23 Lighting: LED Lamp Replacement Hotel in Downtown Vancouver replaced lighting with dimmable LED downlights for conference and boardrooms and exterior lighting. A lamp and PAR lamp shapes 23

24 Lighting: Chandelier Options Relamped incandescent flame shaped lamps with dimmable 8W cold cathode compact fluorescent lamps Relamped incandescent lamps with dimmable LED s 24

25 Lighting: Integrate Lighting Upgrades into Replacement Schedule Measure: When larger lighting upgrade are not possible, integrate lighting upgrades into maintenance / replacement schedule. Replace: 400W HID with lower wattage (330W) energy efficient lamp 50W MR16 with 37W MR16 IR 25

26 Lighting Use LED Technologies in Parkades and Parking lots 26

27 Lethbridge Lodge Comparing compressor power consumption of high efficiency vs. standard products. Results: Payback between 15 and 25 years The longer operating hours per year or increase of electricity cost, the shorter will be the payback for the incremental cost of $30K 27

28 high efficiency condensing boilers Saskatoon Radisson: Roof-Top Unit Replacement Comparison of 5 ton rooftop units Landmark Series (SEER 13) vs. Energence Series (SEER 17) Price difference $1,000 Simple Payback 5 years (based on 15% annual compressor operation time) Recommendation: Higher efficiency SEER 17 unit 28

29 Cascadia Heating Plant Upgrade DHW heaters Boilers Efficiency of the upgraded plant is expected to be 20% higher, resulting in approx 2,500 GJ annual savings 29

30 Regina Inn: Life Cycle Costs Analysis Three Retrofit Options for Variable Refrigerant Flow (VRF) Systems VRF with ceiling mounted horizontal concealed units VRF with wall mounted units PTAC in outside wall mounted units 30

31 Energy Management Behavioural Aspects 31

32 Employee Engagement Programs People, not just technology, control, use and save energy. Employee engagement programs about involving staff and harnessing their abilities to reduce energy... every day. 32

33 Behaviours Change Select high impact and easy to target behaviours first. Identify the target audience. Identify barriers and benefits for each behaviour Use techniques / strategies to address barriers 33

34 Coast Hotels Coast Saver Program Each property created a small e.team Housekeeping and maintenance staff Competed to create and implement energy saving initiatives Each initiative earned a credit Winners - $250 each and a pizza lunch 34

35 BOMA Energy Training Addresses technology, behaviour and organizational Online training for building operations staff on energy management Self-learning format Participants learn at their own pace and have access from remote locations Designed for commercial buildings but transferrable to Health Care Sector. 35

36 The Topics 36

37 Animation and Graphics 37

38 Interactive Activities 38

39 Energy Management Organizational Aspects 39

40 Organizational Characteristics Achievement Plant & Equipment Existing design New Plant Design/selection Innovation & new technology Monitoring & Reporting Metering and monitoring Reporting & Control Documentation & records Financial Management Capital Expenditure Operating Budgets Supply Management Purchasing Procedures Quality and Reliability Load Management Operations & Maintenance Operating procedures Maintenance Leadership Demonstrated Corporate Commitment Understanding Energy Performance and Savings Opportunities Planning Targets, KPI s Plans People Accountabilities Awareness & training Resourcing 40 Source: Hatch Consulting: An Overview of One-2-Five Energy Diagnostic and Benchmarking Tool

41 ANSI/MSE 2000:2008 Management System for Energy 41 Source: tp://innovate.gatech.edu/default.aspx?tabid=2005

42 Continuous Improvement 42

43 Continuous Improvement for Energy Result Measure Take Action Data Analyze Information 43

44 44

45 PUMA Dashboard 45

46 PUMA Meter History and Cost 46

47 Targeting a Level of Energy Use & Measuring Savings 47

48 Resources 48

49 Costs of Operating Equipment Do-It-Yourself using RETScreen v4 Download from 49

50 Energy Savings Toolbox Guide for Self Assessments and Energy Audits Overview of Energy Auditing Energy Analysis Methods Technical Supplements cipec/energy-audit-manual-and-tool.pdf 50

51 Technical Web Resources Natural Resources Canada US Dept of Energy UK Gov t Carbon Trust Energy Star 51

52 Our Firm Energy management consulting services to address technical, behavioural and organizational aspects We design and implement cost effective approaches to address comfort, efficiency and reliability. 650 energy audits in over 1000 buildings, which is equal to 73 million square feet of building area audited and 9,000 energy accounts analyzed. Identified $22 million dollars in annual energy savings equivalent to taking 18,000 cars off the road every year. 52

53 Thank You! Find this presentation here: Robert Greenwald, P.Eng., MBA, President Gilmore Way, Burnaby, BC V5G 4X