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 [2016/03/22 13:44]
kdreimane
planning: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? 
planning/refurbishment_with_passive_house_components/practical_implementations_of_step_by_step_retrofit_to_enerphit_standard.txt · Last modified: 2016/03/22 13:50 by kdreimane