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A Comprehensive Approach to Energy Management for Hotels & Resorts

PRESENTED BY:

ROBERT GREENWALD, PEng, MBA May 18, 2011

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A Comprehensive Approach to Energy

Management

Continuous Improvement

33

Energy Management Technical Aspects

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A Technical Approach: The Seven Steps

3. UnderstandWhen

4. UnderstandWhere

6. MaximizeEfficiency

5. EliminateWaste

7. OptimizeSupply

Find the Savings

Opportunities

2. CompareYourself

1. UnderstandCosts

UnderstandPresentUsage

1. From the

point of

Purchase

2. To the point of

End-Use

3. And, back to

the point of

Purchase

(or supply)

Source: NRCan Dollars to $ense Workshop

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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…

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Step 2 Sector Benchmarks & Good/Best

Practices

Source: http://oee.nrcan.gc.ca/publications/commercial/m144-10-2003e.cfm?attr=16

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Step 3 Daily Interval ProfilesPeak Demand: 2107.9 kW on a 15 minute interval.

PF at Peak: 0%

When:

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

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

Demand Profiles for: ACUTE CARE

7/9/07 10:45 AM Sun Mon Tue Wed Thu Fri Sat

3 Days - Around Peak Day

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Step 4 Understand Where Your Buildings

Use Energy

• Focus your efforts

• Establish a basis for savings calculations

Source: http://oee.nrcan.gc.ca/publications/commercial/m144-10-2003e.cfm?attr=16

99

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

1010

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)

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Step 7 Optimize Energy Supply

• Heat recovery

• Renewable energy

– Solar PV

– Solar thermal

• On-site generation

• Revised supply contracts

1212

EMOs in Energy

Consuming

Systems

Establish Need

Eliminate Waste

Increase Efficiency

Optimize Supply

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Hotel Examples Waste, Efficiency and Supply

1414

Economizer Program for Tower Air

Handlers

• Situation: mechanical cooling when

opportunity for free cooling

• Measure: program to modulate the outside

and atrium air dampers

Cost Savings:

$4,000 / yr

1515

Chilled Water and Condenser Water

Supply Temperature Setpoint Reset

Cost Savings: $5,000 / yr

• 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).

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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.

1717

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

1818

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

1919

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).

• Measure: Install occupancy

sensor and Variable Frequency

Drive

Cost Savings: $1,400 / yr

Occ. Sensor to

turn on pump

VFD runs at a

reduced speed

to match flow

requirements

2020

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

2121

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.

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Banquet or Conference Hall Air

Handler Control Optimization

• Situation: Air handling systems have

demand control ventilation, but CO2 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 CO2 sensor and trim

operating hours.

Cost Savings: $3,600 / yr

2323

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

2424

Lighting: Chandelier Options

Relamped incandescent

flame shaped lamps with

dimmable 8W cold

cathode compact

fluorescent lamps

Relamped incandescent

lamps with dimmable

LED’s

2525

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

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Lighting – Use LED Technologies in

Parkades and Parking lots

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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

2828

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

high

efficiency

condensing

boilers

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Cascadia Heating Plant Upgrade

→ Efficiency of the upgraded plant is expected

to be 20% higher, resulting in approx 2,500

GJ annual savings

DHW heaters Boilers

3030

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

3131

Energy Management Behavioural Aspects

3232

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.

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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

3434

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

3535

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.

www.bomalearning.com

3636

The Topics

www.bomalearning.com

3737

Animation and Graphics

www.bomalearning.com

3838

Interactive Activities

www.bomalearning.com

3939

Energy Management Organizational Aspects

4040

Leadership

Demonstrated

Corporate Commitment

UnderstandingEnergy Performance and

Savings Opportunities

PlanningTargets, KPI’s

Plans

PeopleAccountabilit ies

Awareness & training

Resourcing

Financial

Management

Supply

Management

Operations &

MaintenanceOperating procedures

Maintenance

Plant &

Equipment

Monitoring &

Reporting

Achievement

Existing design

New Plant Design/selection

Innovation & new technology

Metering and monitoring

Reporting & Control

Documentation & records

Purchasing Procedures

Quality and Reliabi li ty

Load Management

Capital Expenditure

Operating Budgets

Leadership

Demonstrated

Corporate Commitment

UnderstandingEnergy Performance and

Savings Opportunities

PlanningTargets, KPI’s

Plans

PeopleAccountabilit ies

Awareness & training

Resourcing

Financial

Management

Supply

Management

Operations &

MaintenanceOperating procedures

Maintenance

Plant &

Equipment

Monitoring &

Reporting

Achievement

Existing design

New Plant Design/selection

Innovation & new technology

Metering and monitoring

Reporting & Control

Documentation & records

Purchasing Procedures

Quality and Reliabi li ty

Load Management

Capital Expenditure

Operating Budgets

Leadership

Demonstrated

Corporate Commitment

UnderstandingEnergy Performance and

Savings Opportunities

PlanningTargets, KPI’s

Plans

PeopleAccountabilit ies

Awareness & training

Resourcing

Financial

Management

Supply

Management

Operations &

MaintenanceOperating procedures

Maintenance

Financial

Management

Supply

Management

Operations &

MaintenanceOperating procedures

Maintenance

Plant &

Equipment

Monitoring &

Reporting

Plant &

Equipment

Monitoring &

Reporting

Achievement

Existing design

New Plant Design/selection

Innovation & new technology

Metering and monitoring

Reporting & Control

Documentation & records

Purchasing Procedures

Quality and Reliabi li ty

Load Management

Capital Expenditure

Operating Budgets

Source: Hatch Consulting: An Overview of One-2-Five Energy Diagnostic and Benchmarking Tool

Organizational Characteristics

4141

ANSI/MSE 2000:2008

Management System for Energy

Source: tp://innovate.gatech.edu/Default.aspx?tabid=2005

4242

Continuous Improvement

4343

Continuous Improvement for Energy

Measure

Analyze

Take Action

Data

Information

Result

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4545

PUMA Dashboard

4646

PUMA Meter History and Cost

4747

Targeting a Level of Energy Use &

Measuring Savings

4848

Resources

4949

Costs of Operating Equipment

Do-It-Yourself using RETScreen® v4

Download from www.retscreen.net

5050

Energy Savings Toolbox

• Overview of

Energy Auditing

• Energy Analysis

Methods

• Technical

Supplements

Guide for Self Assessments and Energy Audits

http://oee.nrcan.gc.ca/publications/infosource/pub/

cipec/energy-audit-manual-and-tool.pdf

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Technical Web Resources

Natural Resources Canada

www.oee.nrcan.gc.ca/publications

US Dept of Energy

http://www.energy.gov/

UK Gov’t Carbon Trust

www.carbontrust.co.uk

Energy Star

http://www.energystar.gov/

5252

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.

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Thank You!

Find this presentation here:

http://prismengineering.com/resources/presentations

Robert Greenwald, P.Eng., MBA, President

320 - 3605 Gilmore Way, Burnaby, BC V5G 4X5

604.205.5500

robert@prismengineering.com www.prismengineering.com