http://www.40percent.org.uk Just another WordPress weblog Tue, 21 Nov 2006 15:48:06 +0000 http://wordpress.org/?v=2.0.1 en http://www.40percent.org.uk/40-percent-research/main-variables-examined/ http://www.40percent.org.uk/40-percent-research/main-variables-examined/#comments Sat, 19 Nov 2005 00:56:25 +0000 Administrator Comments http://www.40percent.org.uk/main-variables-in-40-percent-house-scenario-compared-to-1996-baseline/ Variable 1996 – baseline 2050 – 40% house People and dwellings Population (millions) 59 66.8 Household size (people per household) 2.43 2.1 UK household numbers (millions) 24.231 31.8 UK rate of new construction (pa) 162,000 220,000 UK demolition rate (pa) 8,357 80,000 m² per person 34 38 m² per dwelling 84 84 (refurbished) . 74 (new) Building fabric Space heating demand
(kWh per household) 14,600 8,300 existing . 2,000 new Ventilation rate for new buildings
(air changes per hour) 3.5 0.5 Energy uses Internal temperature (^oC): Zone 1 18.3 21 Internal temperature (^oC): Zone 2 17.3 18 Cooling temperatures No air conditioning No air conditioning Electricity consumption in lights
and appliances, including cooking
(kWh per household) 3,000 1,680 Energy for hot water
(kWh per household) 5000 4950 Supplying energy demand Gas boilers: ownership 69% 8% efficiency 68% 95% Electric heating: ownership 9% 10% efficiency 100% 100% Community heating with
CHP and biomass: ownership 0% 22% Micro-CHP: ownership 0% 21% (Stirling) efficiency (heat:elec) 85:10 80:18 (Stirling) . 20% (fuel cell) 55:35 (fuel cell) Heat pumps: ownership 0% 9% Heat pumps: efficiency 300% 300% Photovoltaics (electricity production) 0% ownership 15% efficiency
20m²
30% ownership Solar Thermal 0% ownership 5m² 60% ownership Emissions factors: Electricity (kgC/kWh) 0.136 0.095 Emissions factors: Gas (kgC/kWh) 0.052 0.052 ]]> http://www.40percent.org.uk/40-percent-research/main-variables-examined/feed/