Recommendations: Operational Energy Strategies

How to Model Common eToolLCD Recommendations

Don’t forget that to record the results for each recommendation individually, you’ll need to hit the red ‘Record’ button in the recommendation window BEFORE you make any changes to the design.

After you’ve completed all the steps for your recommendation, remember to hit the ‘Stop Recording’ button at the top left corner of your screen to finish recording your recommendation.

General Energy Use

Energy Monitoring – Basic/Building Intergrated/Comparative Feedback

  • Add recommendation template(s), each template if applied consecutively will have a cummulative effect in energy savings (5%+5%+5%). If you’re only using one of the strategies on its’ own, the savings are: 5%, 10% and 15% (assuming the system is also building intergrated) respectively.
  • Add material template for the energy monitor
  • Reduce Energy Monitoring Adjustment Factor by the required amount in the ‘Details’ tab at the Design Level. All templates that have ‘EMAF’ in their calculations will be affected by this.

HVAC

Low Impact Refrigerant Gas

  • Bulk Swap R134a to CO2 (materials). Click on green ‘+’ button.
  • Bulk Swap CO2 disposal to ‘Refrigerant Gas Carbon dioxide loss’. Click on green ‘+’ button.
  • Check result that it is showing a GWP reduction.
  • Click ‘Apply Changes’.

High Efficiency Air-Source Heat Pump

  • Add high efficiency hvac template
  • Compare impacts with old template to make sure it is showing a GWP reduction.
  • Delete old hvac template

Ceiling Fans + Heat Pump

  • Add Operational + Embodied template for fans (search for ‘HVAC Residential Ceiling Fans’).
  • assume 20-50% reduction in CL depending on the number of ceiling fans installed and the type of rooms applied to (i.e. Bedrooms only vs all rooms).
  • In the example below, we are assuming that the ceiling fans are only installed in the bedrooms so 20% of the cooling load is met by the ceiling fans.

Wood Pellet Heater + Ceiling Fans (no air-conditioning installed) Only

  • Add Pellet Heater & Ceiling Fans template
  • Check that heating & cooling loads are now 100% fans for cooling and 100% wood pellet for heating
  • Compare impacts with old template to make sure it is showing a GWP reduction.
  • Delete air-source heat pump HVAC system

Domestic Water Heating

Low Flow Shower Head

  • Calculate new water consumption based on % less water used at shower (default is 23% at 5L/min, so scale 0.77).
  • Multiply the scale through the operational water at supply AND treatment entries.
  • Scale through the same value to the hot water system operational energy.
  • Add note to recommendation – low flow often needs higher operational pressure.

Pipe Insulation

  • Use the following equation to estimate the amount of insulation needed for the building (this formular is specifically for multi residential buildings)

InsulationLength = #residencies*((BuildingLength + BuildingWidth/2) + storey height)

  • Add this quantity of pipe insulation to the pipe insulation template
  • Scale the HWS energy by 5% down (scale 0.95)

Gas Instant / Electric Instant / Gas Storage / Heat Pump

  • If applicable, apply this recommendation after the low flow showerheads & pipe insulation
  • Add the desired new system template (different systems will have different levels of impact savings)
  • Put in low flow showerhead & pipe insulation energy adjustment if not already included in new template
  • Compare impacts with old template to make sure it is showing a GWP reduction.
  • Delete the old HWS template

HWS – Solar Thermal + Gas Boost (240L) + Low Flow Showerheads (Single Dwelling)

  • If applicable, apply this recommendation after the low flow showerheads & pipe insulation
  • Add the new system template
  • Check that the low flow showerhead &/or pipe insulation energy % adjustment has been accounted for in the template’s operational energy calculations (i.e 0.95*0.77*[HWS default energy calculations])
  • Compare impacts with old template to make sure it is showing a GWP reduction.
  • Delete the old HWS template

HWS – Solar Thermal + Gas Boost (Multi-Res Spreadsheet required)

  • If applicable, apply this recommendation after the low flow showerheads & pipe insulation
  • Use the solar thermal calculator spreadsheet to determine inputs (number of tanks and m2 solar). Include low flow showerhead & pipe insulation energy adjustment in calculator.
  • Add the HWS solar thermal + gas boost collectors after knowing these values: a) Number of tanks #; b) Add Solar contribution MJ/yr to operational energy inside template; c) Add Hot water demand (including tank losses) MJ/yr to operational energy inside template
  • Add the solar thermal collectors
  • Compare impacts with old template to make sure it is showing a GWP reduction.
  • Delete the old HWS

Cooking

Gas Stove / Induction Stove

  • Add new template (include gas connection template for gas stove)
  • Compare impacts with old template to make sure it is showing a GWP reduction.
  • Delete old template

Refrigeration

Refrigeration: Reduced fridge Space

  • Reduce operational energy of primary fridge only by 10.3% (scale by 0.897)

Refrigeration: Well Ventilated

  • Reduce operational energy of primary fridge only by 12.5% (scale by 0.875)

Lighting

LED Lighting

  • Add LED Lighting template at the same level of natural light as the old template (making sure that you assign it to the correct function)
  • Compare impacts with old template to make sure it is showing a GWP reduction.
  • Delete old lighting template

Increase Natural Lighting

  • Add relevant increased natural lighting template (making sure that you assign it to the correct function).
  • Add skylights/solatube or increase window templates with associated wall reductions accordingly if applicable
  • Compare impacts with old template to make sure it is showing a GWP reduction.
  • Delete old lighting template
  • Ensure that all strategies to increase natural lighting has been noted in recommendation description

Motion Sensors

  • Add the Motion Sensors template (If it’s a commercial building more specific calculations will be required)
  • Modify the lighting run times in the relevant Function – i.e. carpark, common area etc. don’t mix it up

Appliances

Internal/Sheltered Drying Line

  • Reduce dryer operational energy by 25%
  • Add embodied energy clothes line component

High Efficiency Appliances

  • Add high efficiency appliance template
  • Make sure this is done before refrigerant bulk swap, or do another bulk swap during this recording.
  • Compare impacts with old template to make sure it is showing a GWP reduction.
  • Delete base MEPS average template

High Efficiency + Extended Warranty

  • Add high efficiency appliance + extended warranty template
  • Do bulk swap for refrigerant gases if needed.
  • Compare impacts with old template to make sure it is showing a GWP reduction.
  • Delete high efficiency template

Return to: Guide To Recommendations

Other Strategies: Materials Related Strategies, Energy Generation Strategies

Other Related Article: Scenario Feature

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