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Energy Savings Opportunities in Controls, Lighting, Air Conditioning, Water Heating and Refrigeration. Chuck Thomas, P.E. CEM Lead Engineer. Benefits of Energy Conservation. Savings add directly to bottom line Reduced emissions Reduced effluent Conserves resources Reduced maintenance

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Energy Savings Opportunities in Controls, Lighting, Air Conditioning, Water Heating and Refrigeration

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Energy savings opportunities in controls lighting air conditioning water heating and refrigeration l.jpg

Energy Savings Opportunities in Controls, Lighting, Air Conditioning, Water Heating and Refrigeration

Chuck Thomas, P.E. CEM

Lead Engineer


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Benefits of Energy Conservation

  • Savings add directly to bottom line

  • Reduced emissions

  • Reduced effluent

  • Conserves resources

  • Reduced maintenance

  • Improved comfort

  • Provides bragging rights


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First Step - Define your Baseline

  • Perform an Energy Survey

    • Graph utility usage verses weather and occupancy

    • Review utility rates

    • Benchmark your facility verses similar facilities

    • Lighting

    • Water/sewer & water heating

    • Heating and cooling

    • Evaluate controls


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Usage and Billing Data

  • Graph usage

    • Electric kWh, kW, $, average $/kWh

    • Fuel usage, $, $/therm

    • Water/sewer usage, $, $/Ccf or 1,000 gallons

  • Cost per square foot

  • Cost per occupied room

  • Cost per meal

  • Usage verses weather data


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Energy Usage


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Hi-rise Hotel Energy Segments

12 Story - 665 Rooms

20% to 35% common area usage


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Typical Lodging Electric Usage


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Typical Room ElectricEnergy Usage per year


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Annual Hotel Electric Bill per Room

11 Orlando Hotels - Properties were from 141 rooms to 1,020 rooms

Large Convention Ctr

4 Restaurants + 750 rooms

$0.80 to $4.52 per room per night

246 rooms

141 rooms

245 rooms

Small Convention Ctr

+ 1,020 rooms


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Rates

  • Understand the terms

    • Demand, energy, power factor, load factor, hours of use, ratchets, kVAr, kVA, Ccf, therms, etc

  • What are your options

    • Varies with utility and usage

  • Calculate bill under rate options


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Lighting Audit

  • Determine cost per room per month & day

    • Represents 20-30% of electric billing

    • 30-40% savings potential in lighting

      • T8’s - up to 40% savings (more light than 34 watt)

      • Compacts - up to 75% savings and longer life

      • LED exit signs - up to 90 % savings and longer life

    • Savings in A/C

      • Less heat to remove

  • Maintain lighting foot-candles at IES standards


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Water/Sewer & Water Heating

  • Determine cost per room per month & day

    • Check for and repair leaks

    • Deduct meters on cooling tower make-up

    • Low gallon per flush toilets

    • Lower gpm shower heads

      • Customer acceptable models

    • Efficient water heaters

    • Insulated piping

    • Consider heat recovery from refrigeration, A/C


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Heating & Cooling

  • Unoccupied room usage

    • temperature set back - 30% savings of HVAC

  • Window treatments

    • Films, low Summer Heat Gain Coefficient SHGC windows, awnings, sun screens

    • Drapery use - 30% savings of HVAC if used

  • Replace with high SEER, HSPF

  • Book rooms with lowest HVAC cost first

    • Lowest solar exposure - summer

    • Lowest envelope exposure - winter


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Refrigeration

  • Estimate operating cost

  • Check

    • temperature settings

    • seals, door alignment

    • coil condition

    • location of condensers

    • defrost controls

  • Replace with high efficiency systems

  • Run only what is necessary


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Controls

  • Check for proper operation

    • note complaints

  • Training of personnel

    • temperature settings

    • draperies

  • Consider Energy Management Systems

    • Documents usage

    • Documents operation

    • Automates controls

  • Establish Energy Awareness Campaign


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Energy Awareness Campaign

  • Shows management commitment

  • Reward system for each departments participation in meeting goals

    • Recognition for enthusiastic support

    • Dinner coupons or room night coupons for leadership role in meeting goals

    • Department with highest savings rewarded

  • Internal newsletter needs to highlight progress towards goals

  • Financial backing for low-cost fast payback projects


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Energy Awareness Campaign:

  • Select attainable goals

    • Based on energy audit and benchmarking

  • Reduce average kWh monthly usage by X% (compared to last year, weather neutralized)

  • Reduce average gallons of water monthly usage by y% (compared to last year)

  • Reduce average Gas monthly usage by z% (compared to last year)


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Review

  • Understand your usage

  • Look for changes

  • Keep up on maintenance

  • Install high efficient lighting, water heating and HVAC systems

  • Reduce water usage

  • Insure proper controls and operation

  • Establish an Energy Awareness Program


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Summary - Significant benefits are possible by implementing conservation programs

  • Show them the money

  • Document the other savings

    • Reduced emissions

    • Reduced effluent

    • Conserved water, fuel

    • Reduced maintenance

    • Improved comfort

  • Brag


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