Bosch Thermotechnik. Thermotechnology

Transkript

1 Bosch Thermotechnik Energy Plus Home with available technology Miriam Asbeck, Energy Plus Home Project Manager Press conference in Stuttgart Bosch Haus Heidehof, 5 May

2 Energy Plus Home with available technology Can the Energy Plus Home be realised with today s available technology? Basis What is an Energy Plus Home? General conditions for the four reference buildings selected An example Presentation of four reference buildings Sensible use of today s available technologies Energy balances Cost-income analysis 2

3 Energy Plus Home What is an Energy Plus Home? Primary energy credits Primary energy requirements (heating/ hot water/ electricity) Existing buildings ~400 kwh/(m²a) 1980s ~300 kwh/(m²a) 1990s 2010 Passive house ~230 kwh/(m²a) ~185 kwh/(m²a) 120 kwh/(m²a) More energy is produced than is needed 3

4 Energy Plus Home The Energy Plus Home and its limits Primary energy credits 2. max. PV yield! Possibility 1: Optimise the shell Possibility 2: Generate electricity Primary energy requirements (heating/ hot water/ electricity) 1. Residual requirements! Existing buildings 1980s 1990s 2010 Passive house ~400 kwh/(m²a) ~300 kwh/(m²a) ~230 kwh/(m²a) ~185 kwh/(m²a) 120 kwh/(m²a) An integrated approach (shell technology electricity generation) is required to convert as many houses as possible into Energy Plus Homes 4

5 Energy Plus Home Conditions and energy requirements in a single-family home 4 person household, Germany, Würzburg 178 sqm of living space, ground plan 10 x 9 m, oriented towards the south Roof slope of the existing house: 45 with 50 sqm PV surface, Roof slope of the new buildings: 30 with 78 sqm PV surface Heating requirements scaled to kwh/(m²a) see overview Reference: Heating and hot water requirements covered with condensing gas Hot water requirements kwh/a incl. distribution network losses Electricity requirements kwh/a Overview of heating requirements Existing Q h 200 kwh/(m 2 a) kwh/a Existing refurbished Q h 90 kwh/(m 2 a) kwh/a New Q h 70 kwh/(m 2 a) kwh/a 4-litre house Q h 40 kwh/(m 2 a) kwh/a 5

6 Energy Plus Home with available technology Example 3 Energy balance of a 4-litre house with standard technology Q p Primary energy requirements kwh/a Modern prefabricated skeleton-style house 25 cm facade insulation Heating requirements (Q h ): 40 kwh/(m 2 a) 6

7 Energy Plus Home with available technology Example 3 Energy balance of a 4-litre house with modern technology Residual requirements kwh/a kwh/a kwh/a Q p Q p Primary energy requirements kwh/a A++ household appliances and A++ lamps Controlled ventilation with heat recovery Brine/water heat pump Photovoltaics on the roof Primary energy credits kwh/a 7

8 Energy Plus Home with available technology Example 3 Energy balance of a 4-litre house with modern technology Q p Primary energy requirements kwh/a If modern technology is used, a positive balance can be achieved in a 4-litre house Q p Primary energy credits kwh/a 8

9 Presentation of the Energy Plus Home Example 3 Cost balance of a 4-litre house with modern technology Costs Controlled ventilation, geothermal heat pump approx Plus photovoltaics and household appliances approx Savings in relation to condensing gas boiler approx /a primary energy approx MWh/a CO 2 approx kg/a 9

10 Illustration of the Energy Plus Home Can the Energy Plus Home be realised today? Result for existing buildings The use of modern technology makes it possible to achieve dramatic savings Plus Energy balance possible in insulated existing buildings (1990s standard) Result for new buildings Optimisation of the building shell testing its limits A positive energy balance is easily achieved Conclusion Realization of the Energy Plus Home 1. Reduce energy requirements as far as possible 2. Cover the remaining energy requirements as efficiently as possible 3. Generate as much electricity as possible 10

11 Energy Plus Home with available technology Can the Energy Plus Home be realised with today s available technology? Basis What is an Energy Plus Home? General conditions for the four reference buildings selected An example Presentation of four reference buildings Sensible use of today s available technologies Energy balances Cost-income analysis 11