A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Energy renovation of multi-storey buildings with heritage value
The EU has a goal of reducing greenhouse gas emissions and energy consumption by 20% by 2020, by 40% in 2030 and by 80% in 2050 compared to 1990-levels, and Denmark has set the even more ambitious goal of being completely fossil-fuel-free by 2050. On the way to this goal, the aim is that the energy-supply mix for buildings including heating and electricity should be free of fossil fuels as early as 2035 including heating and electricity. Urgent action is therefore needed to meet these requirements for the future energy system. A balance needs to be found between saving energy in buildings and supplying energy from district heating based on renewable energy resources and waste incineration. This research took a new approach combining heat savings in buildings with heat supply from district heating and seeing them as two segments that reinforce each other, instead of seeing them as two separate competitive instances. The question was to what extent we should supply renewable energy and to what extent we should save energy in buildings to optimise the costs and energy at a societal level. Calculations showed that the socioeconomic cost of reducing heating consumption in buildings by 30-65% is similar to the socioeconomic cost of supplying the same amount of district heating using renewable energy sources. For the district heating system in the Copenhagen area, socioeconomic calculations indicate that it is slightly more cost-beneficial to invest in energy renovations from 2013, so that we can reduce the heat demand, before investing in new renewable energy supply technologies. However, the results from the socioeconomic calculations are very sensitive to the discount rate assumed. The higher the discount rate is, the more beneficial it will be to postpone large investments, i.e. the energy renovations. However, the conclusion is that it does not make a great difference which scenario is chosen from a socioeconomic point of view. The costs for supplying heat and saving heat are at comparable levels. But investing in ...
Energy renovation of multi-storey buildings with heritage value
The EU has a goal of reducing greenhouse gas emissions and energy consumption by 20% by 2020, by 40% in 2030 and by 80% in 2050 compared to 1990-levels, and Denmark has set the even more ambitious goal of being completely fossil-fuel-free by 2050. On the way to this goal, the aim is that the energy-supply mix for buildings including heating and electricity should be free of fossil fuels as early as 2035 including heating and electricity. Urgent action is therefore needed to meet these requirements for the future energy system. A balance needs to be found between saving energy in buildings and supplying energy from district heating based on renewable energy resources and waste incineration. This research took a new approach combining heat savings in buildings with heat supply from district heating and seeing them as two segments that reinforce each other, instead of seeing them as two separate competitive instances. The question was to what extent we should supply renewable energy and to what extent we should save energy in buildings to optimise the costs and energy at a societal level. Calculations showed that the socioeconomic cost of reducing heating consumption in buildings by 30-65% is similar to the socioeconomic cost of supplying the same amount of district heating using renewable energy sources. For the district heating system in the Copenhagen area, socioeconomic calculations indicate that it is slightly more cost-beneficial to invest in energy renovations from 2013, so that we can reduce the heat demand, before investing in new renewable energy supply technologies. However, the results from the socioeconomic calculations are very sensitive to the discount rate assumed. The higher the discount rate is, the more beneficial it will be to postpone large investments, i.e. the energy renovations. However, the conclusion is that it does not make a great difference which scenario is chosen from a socioeconomic point of view. The costs for supplying heat and saving heat are at comparable levels. But investing in ...
Energy renovation of multi-storey buildings with heritage value
Harrestrup, Maria (author)
2014-01-01
Harrestrup , M 2014 , Energy renovation of multi-storey buildings with heritage value . B Y G D T U. Rapport , vol. R-324 , Technical University of Denmark .
Book
Electronic Resource
English
DDC:
690
Renovation, indoor climate and energy saving in multi-storey apartment buildings in Estonia
| British Library Conference Proceedings | 2002
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