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Energy Efficiency Dolls House

 So, our wonderful master carpenter Simon has created a lovely, empty dolls house for us that we want to fill with models of energy efficiency and renewable generation interventions.  Here's the empty house:

Empty dolls house

The things I'm going to try to add on Friday (tomorrow):

  • Insulation
    • cavity wall insulation
    • internal solid wall insulation
    • external solid wall insulation
    • floor insulation (divide the floor into 3 sections)
      • blank on the left
      • glass wool suspended by chicken wire in the middle
      • rigid foam wedged between joists and supported by struts on the right
    • roof insulation (divide into multiple sections)
      • just glass wool filling the joists
      • wool between joists + wool over the joists, perpendicular
      • wool between joists + rigid foam over joists
      • rigid foam between joists
  • PV panels on the roof connected to LED lamps in the rooms (should actually work!)
  • Hot water talk with jacket in bathroom
  • Cold water tank in loft with insulation over it
  • Doll's house models

The things we'll add when we get time later:

  • Fire safety features
    • smoke alarms in every room
  • Radiators with TRVs
  • Room thermostats
  • A model of an grid-tied PV inverter
  • Pretty brick textures for the external walls
  • Fire place with balloon installed
  • Show roof ventilation in the eyves

Please let us know if you have any comments or suggestions!

Submitted by Jack on Thu, 15/04/2010 - 4:02pm
tags:

#1

Submitted by Jack on Fri, 16/04/2010 - 10:11pm.

 OK.  I've just finished adding most of the insulation.  Now I'm going to try to pull together the essential info to go with the exhibit: how much each thing costs, what it saves financially, what it saves environmentally and a few quick notes.  Here goes:

 

  • Insulation
    • cavity wall insulation
    • solid walls
      • 45% of the heatloss from an uninsulated solid walled home is through the walls
      • see good EST doc
      • internal solid wall insulation
        • Pros compared to external
          • Probably cheaper
          • No alteration to external appearance; no planning issues; no neighbour issues
          • Easier to DIY
      • external solid wall insulation
        • Pros compared to internal
          • No loss of internal floor area
          • No need to re-decorate internally
          • Almost completely eliminates cold bridging 
          • Maintain thermal mass of the wall
    • floor insulation (divide the floor into 3 sections)
      • blank on the left
        • U-value of 20mm wood floor board = 20W/m2/K (!)
      • glass wool suspended by chicken wire in the middle
        • if you have joists 150mm or deeper then wool is cheaper and easier than foam. 150mm wool = 0.25W/m2/K. 200mm = 0,19W/m2/K
      • rigid foam wedged between joists and supported by struts on the right
        • if you have joists shallower than 150mm then rigid foam is needed to achieve best practice performance.
          • 150mm foam = 0.15 W/m2/K
          • 100mm foam = 0.23 W/m2/K
    • loft insulation (divide into multiple sections)
      • just glass wool filling the joists
        • £325 (empty loft) £265 (top-up from 75 mm)
        • Saving
          • from empty to 270mm = £85-295 per year
        • see the excellent table on the EST
        • Performance
          • empty (U=5.56) to 270mm (U=0.16) = 35-fold reduction in heat loss:
          • 80mm (U=0.48) to 270mm (U=0.16) = 3-fold reduction in heat loss
      • wool between joists + wool over the joists, perpendicular
      • wool between joists + rigid foam over joists
        • 80mm wool +100mm foam = 0.16
      • rigid foam between joists
        • 150mm foam = 0.16
  • PV panels on the roof connected to LED lamps in the rooms (should actually work!)
  • Hot water talk with jacket in bathroom
  • Cold water tank in loft with insulation over it
  • Doll's house models

 

»

#2

Submitted by Jack on Mon, 19/04/2010 - 10:20am.

 And here's the (almost) finished doll's house complete with explanations:

energy efficiency dolls house

»

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