basics:affordability:investing_in_energy_efficiency:economic_feasibility_of_passive_house_retrofits:factors_that_influence_the_energy_balance_and_affordability_of_non-residential_enerphit_projects
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basics:affordability:investing_in_energy_efficiency:economic_feasibility_of_passive_house_retrofits:factors_that_influence_the_energy_balance_and_affordability_of_non-residential_enerphit_projects [2014/05/28 12:03] – twessel | basics:affordability:investing_in_energy_efficiency:economic_feasibility_of_passive_house_retrofits:factors_that_influence_the_energy_balance_and_affordability_of_non-residential_enerphit_projects [2014/09/18 18:19] – external edit 127.0.0.1 | ||
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+ | ====== Factors that influence the energy balance and affordability of non-residential EnerPHit projects ====== | ||
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+ | ===== Does it make sense to retrofit non-residential buildings with Passive House components if the buildings have a lot of internal heat sources ?===== | ||
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+ | Often, it is not possible (within reason) to retrofit buildings in compliance with the Passive House Standard for various reasons (remaining thermal bridges to the basement, suboptimal orientation, | ||
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+ | A study [[basics: | ||
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+ | ===== Methodology and subject matter ===== | ||
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+ | Functions to calculate variants and affordability were added to the PHPP in a parameter study to determine the influence of internal heat sources (1 to 12 W/m²) on demand for heating energy and the affordability of insulation in a hypothetical reference office building with a typical floor plan. Three statuses were compared: unrenovated, | ||
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+ | ===== Findings and conclusion ===== | ||
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+ | It was found that office buildings have usage parameters that make it even easier to reach a low level of demand for heating energy after retrofits compared to residential buildings. When large office complexes are retrofitted, | ||
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+ | |{{: | ||
+ | |**//Figure 1: \\ Annual benefits from a square meter of external wall insulation \\ (instead of the new plaster needed regardless) in the reference office building \\ studied with insulation qualities from each standard \\ and with different internal heat sources// | ||
+ | \\ | ||
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+ | The annual financial payback of insulation will admittedly be somewhat lower if there are great internal heat sources, but the investments nonetheless pay for themselves. With moderate internal heat sources, the EnerPHit variety always provides a better payback for the components studied than the EnEV 2009 standard does. Only when the internal heat sources reach 12 W/m² is there little difference between the two standards (Figure 1). But such high levels of internal heat are an indication that electricity is being used very inefficiently, | ||
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+ | ===== References ===== | ||
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+ | **[Bastian 2012]** |
basics/affordability/investing_in_energy_efficiency/economic_feasibility_of_passive_house_retrofits/factors_that_influence_the_energy_balance_and_affordability_of_non-residential_enerphit_projects.txt · Last modified: 2019/02/07 12:25 by cblagojevic