ATEM MODULE 7: WATER A c c r e d i t e d T e x a s E n e r g y M - - PowerPoint PPT Presentation

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Nov 16, 2023 204 likes •392 views

ATEM MODULE 7: WATER A c c r e d i t e d T e x a s E n e r g y M a n a g e r Uses of Water Domestic -Restrooms -Drinking water -Locker rooms -Kitchens -Cleaning Irrigation -Athletic fields -Landscaping HVAC/Cooling Towers A

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SLIDE 1

ATEM MODULE 7: WATER

A c c r e d i t e d T e x a s E n e r g y M a n a g e r

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SLIDE 2

Uses of Water

❯Domestic

  • Restrooms
  • Drinking water
  • Locker rooms
  • Kitchens
  • Cleaning

❯Irrigation

  • Athletic fields
  • Landscaping

❯HVAC/Cooling Towers

A c c re d i t e d Tex a s E n e rg y M a n a ge r

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SLIDE 3

Water Wasters

A c c re d i t e d Tex a s E n e rg y M a n a ge r

❯Equipment design ❯Occupant behavior ❯Maintenance practices

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SLIDE 4

e n e r g y m a n a g e m e n t p r o g r a m : f u n d a m e n t a l s a n d d e v e l o p m e n t

Texas Benchmark Water Usage

Use Office Buildings Schools Indoor Use

9 – 5 gal./ft2/year 8 – 16 gal./ft2/year 9 – 16 gal./employee/day 3 – 15 gal./student/day

Irrigation

26” – 50” per year 22” – 50” per year

Cooling

8.5 – 22 gal./ft2/year 8 – 20 gal./ft2/year

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SLIDE 5

How Much Water Can a Drip Waste?

A c c re d i t e d Tex a s E n e rg y M a n a ge r

❯Slow Steady Drip ❯Fast Drip ❯Small Steady

Stream

Up to ‘x’ gallons per year

  • 1,000
  • 3,000
  • 15,000
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SLIDE 6

Water Conservation Indoors

❯Use only water necessary for cleaning ❯Repair leaks & malfunctions ❯Install low flow & low use fixtures

  • Toilets & Urinals
  • Faucets
  • Showerheads
  • Spray Nozzles

❯Post signs encouraging water conservation ❯Make sure faucets & showers are turned off ❯Install metered or sensor faucets ❯Check for/repair drips & leaks

A c c re d i t e d Tex a s E n e rg y M a n a ge r

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SLIDE 7

e n e r g y m a n a g e m e n t p r o g r a m : f u n d a m e n t a l s a n d d e v e l o p m e n t

Plumbing Fixture Standards

Fixture Federal Texas Toilet

1.6 gpf 1.28 gpf

Urinal

1.0 gpf 0.5 gpf

Showerhead

2.5 gpm 2.5 gpm

Sink

2.5 gpm 2.2 gpm

Lavatory

2.5 gpm 2.5 gpm

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SLIDE 8

Cooling Towers Terminology

❯Blowdown

  • Water removed to reduce contaminants

❯Drift

  • Loss of water, carried out by air drafts

❯Makeup Water

  • Water added to replace losses

A c c re d i t e d Tex a s E n e rg y M a n a ge r

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SLIDE 9

e n e r g y m a n a g e m e n t p r o g r a m : f u n d a m e n t a l s a n d d e v e l o p m e n t

Cooling Towers

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Water Conservation: Cooling Towers & Boilers

❯Reduce scaling & bio-growth ❯Minimize blowdown ❯Filter out sediment ❯Keep equipment clean/in good order

  • Coils
  • Fans
  • Condensers
  • Feedwater equipment

❯Shut down when not needed ❯Separate utility metering for cooling towers

A c c re d i t e d Tex a s E n e rg y M a n a ge r

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SLIDE 11

Water Conservation: Irrigation

❯Water late or early ❯Avoid watering on windy days ❯Adjust for seasonal demand ❯Perform maintenance ❯Use sensors ❯Watch for over-watering/excess runoff ❯Use rainwater harvesting or irrigation wells ❯Use plants & grasses that require less water

A c c re d i t e d Tex a s E n e rg y M a n a ge r

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SLIDE 12

Water Conservation: Irrigation Sensors

❯Rain sensors

  • Measure rainfall
  • Interrupt watering when rainfall reaches a preset amount

❯Moisture sensors

  • Measure ground moisture
  • Adjustable moisture setpoints
  • Shut off system when selected moisture level is reached

❯Wind sensors

  • Measure wind speed
  • Interrupt watering when wind exceed preset speed

A c c re d i t e d Tex a s E n e rg y M a n a ge r

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Water Collection

A c c re d i t e d Tex a s E n e rg y M a n a ge r

❯Rainwater Collection

  • Collect from roof via drains & laterals
  • Direct to tanks

❯Condensate Collection

  • Average condensate collected: 0.3 gallons

per hour per ton of cooling

❯Grey Water Collection

  • From laundries, lavatories, showers, NOT toilets
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SLIDE 14

Water Collection

❯How much water can you catch?

Gallons (annual) = roof area x average rainfall x 600 1000

A c c re d i t e d Tex a s E n e rg y M a n a ge r

City

  • Avg. Rainfall

Gallons/s.f.

Wichita Falls 25” 15 Fort Worth 32” 19 Dallas 36” 22 Tyler 40” 24

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SLIDE 15

Waterless Urinals

❯Advantages

  • Water savings
  • Low maintenance

› No flush valve repairs › Reduced vandalism › No overflow from clogged drains

  • Improved hygiene

› Dry surfaces, limits germs › No handle to touch › No aerosolizing of particles

  • Potential utility rebates

❯Disadvantages

  • Odors if not maintained
  • Remodeling for retrofits
  • Public hesitancy to use
  • Local code officials approval

A c c re d i t e d Tex a s E n e rg y M a n a ge r

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Water Conservation Summary

❯Verify account numbers with service addresses ❯Review bills for “reasonableness” ❯Have water conservation policies ❯Utilize water conserving fixtures ❯Check for & repair leaks ❯See if your city offers reimbursements for repaired leaks ❯Establish a relationship with city representatives ❯Check on utility rebates & incentives

A c c re d i t e d Tex a s E n e rg y M a n a ge r

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SLIDE 17

Ashley Williams, MCRP & ATEM

❯ Texas Energy Managers Association ❯ Director of Curriculum and Certification ❯ awilliams@texasema.org

questions

e n e r g y m a n a g e m e n t p r o g r a m : f u n d a m e n t a l s a n d d e v e l o p m e n t

Texas Energy Managers Association

❯ www.texasema.org

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SLIDE 18