planning:refurbishment_with_passive_house_components:practical_implementations_of_step_by_step_retrofit_to_enerphit_standard

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planning:refurbishment_with_passive_house_components:practical_implementations_of_step_by_step_retrofit_to_enerphit_standard [2016/03/10 17:43] kdreimaneplanning:refurbishment_with_passive_house_components:practical_implementations_of_step_by_step_retrofit_to_enerphit_standard [2016/03/22 13:50] (current) kdreimane
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 \\ In order to meet the energy reduction targets defined by the European Union for 2020 and 2030, all new building energy retrofits throughout Europe should be strongly encouraged to reach the EnerPHit energy efficiency level. Scenarios were developed by the European project ENTRANZE, based on existing efficiency policies, expected costs and retrofit needs defined by each Member State. These scenarios show that 5% of the European building stock could be deeply renovated by 2030, bringing energy consumption down to EnerPHit/nearly Zero Energy Building levels [Entranze 2014]. To ensure that deep retrofits further proliferate, step-by-step retrofit strategies need to be developed. This will allow owners to spread the required investment over a period that is reasonable with their financing capabilities, without compromising on energy quality. The European project EuroPHit is an opportunity to implement these strategies on normal buildings facing common constraints. \\ In order to meet the energy reduction targets defined by the European Union for 2020 and 2030, all new building energy retrofits throughout Europe should be strongly encouraged to reach the EnerPHit energy efficiency level. Scenarios were developed by the European project ENTRANZE, based on existing efficiency policies, expected costs and retrofit needs defined by each Member State. These scenarios show that 5% of the European building stock could be deeply renovated by 2030, bringing energy consumption down to EnerPHit/nearly Zero Energy Building levels [Entranze 2014]. To ensure that deep retrofits further proliferate, step-by-step retrofit strategies need to be developed. This will allow owners to spread the required investment over a period that is reasonable with their financing capabilities, without compromising on energy quality. The European project EuroPHit is an opportunity to implement these strategies on normal buildings facing common constraints.
 PHPP 9 was used with variant calculations and economic assessments to answer questions submitted by building owners and find adequate solutions for each case. A variety of buildings have been analysed: social dwellings, single family houses and non-residential buildings. PHPP 9 was used with variant calculations and economic assessments to answer questions submitted by building owners and find adequate solutions for each case. A variety of buildings have been analysed: social dwellings, single family houses and non-residential buildings.
-[{{ :kintija_s_playground:heating_consumption.png?500|Figure 1: Heating consumption of a non-refurbished office in Rhône-Alpes, 2014 (Archipente)}}]+[{{ :picopen:heating_consumption_2.png?500|Figure 1: Heating consumption of a non-refurbished office in Rhône-Alpes, 2014 (Archipente)}}]
 **2. Does PHPP work well on poor energy efficiency buildings?** **2. Does PHPP work well on poor energy efficiency buildings?**
 \\ The heating consumption modelled by PHPP, once updated with the actual figures of use and climate, quite accurately reflects the measured consumption of buildings refurbished to the EnerPHit standard [Keig, Heid 2014], [Bradshaw, Croxford 2013]. However, in a building which lacks insulation and/or airtightness, the indoor air temperature measured in winter can be significantly higher than the interior radiant temperatures. Calculating ventilation losses according to an average indoor operative temperature, instead of using indoor air temperature can lead to incorrect results in this context [Gasparella, Pernigotto 2012]. Is the error on the heating demand so large, that one needs to simulate the building with some dynamical software instead of the PHPP?  \\ The heating consumption modelled by PHPP, once updated with the actual figures of use and climate, quite accurately reflects the measured consumption of buildings refurbished to the EnerPHit standard [Keig, Heid 2014], [Bradshaw, Croxford 2013]. However, in a building which lacks insulation and/or airtightness, the indoor air temperature measured in winter can be significantly higher than the interior radiant temperatures. Calculating ventilation losses according to an average indoor operative temperature, instead of using indoor air temperature can lead to incorrect results in this context [Gasparella, Pernigotto 2012]. Is the error on the heating demand so large, that one needs to simulate the building with some dynamical software instead of the PHPP? 
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 \\ Despite successful examples, the EnerPHit standard is still seen by many building owners as a challenge. The EuroPHit case studies aim to provide pragmatic answers, removing barriers one by one. \\ Despite successful examples, the EnerPHit standard is still seen by many building owners as a challenge. The EuroPHit case studies aim to provide pragmatic answers, removing barriers one by one.
  
-[{{ :picopen:u-value.png?700|Figure 2:U-value of existing wall (PHPP), global cost and NPV for ETICS retrofit Envelope}}]+[{{ :picopen:u-value.png?700|Figure 2: U-value of existing wall (PHPP), global cost and NPV for ETICS retrofit Envelope}}] 
 **3.1 Investment** **3.1 Investment**
 \\ The first barrier is the amount of investment required: if the owner can’t invest the total budget needed for envelope and building services, then they can invest step-by-step. In several EuroPHit case studies, the investment will be spread over two steps: energy efficiency finished before 2016, then renewable energy (solar thermal and/or photovoltaics) scheduled by 2020 or 2025. Other case studies will focus first on the thermal envelope and mechanical ventilation with heat recovery, before refurbishing hot water, heating and electricity. Costs associated with asbestos or fire protection should be treated as unavoidable costs as they have no impact on the economic efficiency of an EnerPHit rehabilitation [Ebel 2014]. They must still be carefully studied as asbestos removal for example, can cost up to €15000 per dwelling. \\ The first barrier is the amount of investment required: if the owner can’t invest the total budget needed for envelope and building services, then they can invest step-by-step. In several EuroPHit case studies, the investment will be spread over two steps: energy efficiency finished before 2016, then renewable energy (solar thermal and/or photovoltaics) scheduled by 2020 or 2025. Other case studies will focus first on the thermal envelope and mechanical ventilation with heat recovery, before refurbishing hot water, heating and electricity. Costs associated with asbestos or fire protection should be treated as unavoidable costs as they have no impact on the economic efficiency of an EnerPHit rehabilitation [Ebel 2014]. They must still be carefully studied as asbestos removal for example, can cost up to €15000 per dwelling.
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 The EuroPHit project is co-funded by the European Commission under the grant agreement IEE/12/070/SI2.645928. The EuroPHit project is co-funded by the European Commission under the grant agreement IEE/12/070/SI2.645928.
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 **5. References** **5. References**
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 | [Sevela, Pfluger 2014] | Energy refurbishment of heritage buildings with PHPP’s and real measurements’ feedback, 18th International Passive House Conference, Aachen, 2014 | | [Sevela, Pfluger 2014] | Energy refurbishment of heritage buildings with PHPP’s and real measurements’ feedback, 18th International Passive House Conference, Aachen, 2014 |
 | [Schulz 2008] |Verglaste Balkone – eine Option für die Altbaumodernisierung?, Protokollband Nr. 37. Passivhaus Institut, Darmstadt, 2008 | | [Schulz 2008] |Verglaste Balkone – eine Option für die Altbaumodernisierung?, Protokollband Nr. 37. Passivhaus Institut, Darmstadt, 2008 |
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planning/refurbishment_with_passive_house_components/practical_implementations_of_step_by_step_retrofit_to_enerphit_standard.1457628193.txt.gz · Last modified: 2016/03/10 17:43 by kdreimane