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--- planning:refurbishment_with_passive_house_components:step-by-step_deep_retrofit_and_building_integrated_facade_roof_on_a_million_program_house [2019/02/21 12:55] – cblagojevic
+++ planning:refurbishment_with_passive_house_components:step-by-step_deep_retrofit_and_building_integrated_facade_roof_on_a_million_program_house [2020/08/14 00:17] (current) – [3. BIPV façade with external insulation retrofit] wfeist
@@ Line 34: / Line 34: @@
 This deep energy retrofit of Stacken is a good example for the EuroPHit project (Figure 1) – which promotes thorough planning of step-by-step retrofit approaches to the EnerPHit Standard [4]. In this demonstration project, since it is deemed feasible, performance is planned to surpass the EnerPHit criteria (surpass space heating demand by max. 25 kWh/(m2a) and airtightness of n<sub>50</sub> = 1.0 /h) by renovating to the “full” Passive House Standard (15 kWh/(m2a) and 0.6 /h, respectively, or better).
-[{{:picopen:tab_1_deep1.png?600|Table 1: Short definition of steps; MVHR: mechanical ventilation heat recovery}}]
+[{{:picopen:tab_1_deep1.png?direct|Table 1: Short definition of steps; MVHR: mechanical ventilation heat recovery}}]
 ==== 2.2 Steps ====
@@ Line 44: / Line 44: @@
 The treated floor area (TFA) is measured according to PHPP regulations, and the pressure test result is estimated (since the windows were replaced 27 years ago and the building envelope is generally relatively airtight) (Figure 2).
-[{{:picopen:fig_2_deep.png?600|Figure 2: PHPP results before start of renovation}}]
+[{{:picopen:fig_2_deep.png?direct|Figure 2: PHPP results before start of renovation}}]
 ==== 2.2.2 Steps 1 and 2 ====
@@ Line 56: / Line 56: @@
 The façade in this project is planned to be a thin film solar cell with a conversion efficiency of 7–8 %, while on the roof above the existing roof material, a crystalline module with 14–16% efficiency will be used (Figure 3). Another advantage with thin film modules on the façade (other than the lower cost per square meter) is that they also perform well under shading and in diffuse light. Total electrical production from the roof (38 MWh/a) and façade (86 MWh/a) is expected to be approximately 124 MWh/a, compared to a predicted demand of 105 MWh/a (Figure 4).
-[{{:picopen:fig_3_deep.png?600|Figure 3: Façade elevation (left) and roof plan (right) after BIPV}}]
+[{{:picopen:fig_3_deep.png?direct|Figure 3: Façade elevation (left) and roof plan (right) after BIPV}}]
-[{{:picopen:fig_4_deep.png?600|Figure 4: Typical electricity production from the BIPV compared to expected demand from the building}}]
+[{{:picopen:fig_4_deep.png?direct|Figure 4: Typical electricity production from the BIPV compared to expected demand from the building}}]
-\\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ The a-Si modules are attached with screws and an external aluminium extrusion to the furring (that is part of the chosen façade insulation system), running vertically up the façade and rest on L shaped fittings also screwed into the furring. Using point fasteners to hold the modules in place may have been a simpler solution, if not for the reason that FEM modelling showed that the wind load would pose a risk of breaking modules at stress concentrations near the fasteners. Because of fire regulations on buildings higher than eight stories, the furring is made of metal. Wood furring would have been preferred considering the environmental impact. On each side, the glass is protected from the mounting system parts by foamed EPDM rubber strips (Figure 5). On the roof, the mounting system is similar with the main difference that modules are overlapping so that water will move from the module above to the one below.
+\\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\
+The a-Si modules are attached with screws and an external aluminium extrusion to the furring (that is part of the chosen façade insulation system), running vertically up the façade and rest on L shaped fittings also screwed into the furring. Using point fasteners to hold the modules in place may have been a simpler solution, if not for the reason that FEM modelling showed that the wind load would pose a risk of breaking modules at stress concentrations near the fasteners. Because of fire regulations on buildings higher than eight stories, the furring is made of metal. Wood furring would have been preferred considering the environmental impact. On each side, the glass is protected from the mounting system parts by foamed EPDM rubber strips (Figure 5). On the roof, the mounting system is similar with the main difference that modules are overlapping so that water will move from the module above to the one below.
 [{{:picopen:fig_5_deep.png?600|Figure 5: Horizontal section of wall}}]