planning:thermal_protection:thermal_protection_works:comparison_of_in_situ_measurements_and_hygrothermal_simulations_of_four_different_interior_insulation_systems:start
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planning:thermal_protection:thermal_protection_works:comparison_of_in_situ_measurements_and_hygrothermal_simulations_of_four_different_interior_insulation_systems:start [2014/06/02 15:29] – twessel | planning:thermal_protection:thermal_protection_works:comparison_of_in_situ_measurements_and_hygrothermal_simulations_of_four_different_interior_insulation_systems:start [2019/10/14 09:35] (current) – [Conclusions] cblagojevic | ||
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+ | ====== Comparison of in-situ measurements and hygrothermal simulations of four different interior insulation systems ====== | ||
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+ | ===== Introduction ===== | ||
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+ | Old buildings often do not have any insulation on the exterior wall going along with low, uncomfortable surface temperatures and high heating demands. In order to produce comparable thermal comfort conditions to modern buildings insulation is strongly needed. From the view point of building physics, insulating the exterior side of a wall is the better solution. In many cases though, e.g. if a building is listed, this is not possible. So insulating the interior side becomes an interesting option, but a closer look to potential risks has to be taken. Since the old construction will become much colder than it was without interior insulation, the risk of moisture damage increases. Furthermore, | ||
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+ | All the above issues come together in the residential building complex called “Hohenzollern-Höfe“ in Ludwigshafen, | ||
+ | \\ | ||
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+ | |{{: | ||
+ | |//**Figure 1: \\ Photo of the residential complex “Hohenzollern-Höfe”, | ||
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+ | The reduction of energy demand of the whole complex plays an important role in the retrofit scheme. The exterior facade in neo-baroque style (Figure 1) could not be insulated with an exterior insulation and finishing system since the building is listed. So, the concept of interior insulation was followed and four different insulation systems were applied in different rooms. In order to investigate the influence of the interior insulation systems on the hygric behaviour of the wooden beam heads and to compare the different insulation systems, temperatures and relative humidities at different positions within the construction were measured [[planning: | ||
+ | \\ | ||
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+ | ===== Read more ===== | ||
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+ | //The following in-depth articles are available exclusively to iPHA members! // | ||
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+ | [[planning: | ||
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+ | [[planning: | ||
+ | \\ | ||
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+ | ===== Conclusions ===== | ||
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+ | After a measurement period of more than 2 years hygrothermal simulations using the measured boundary conditions were done. All insulation systems perform well and there is no evidence for any moisture problems either in the regular constructions or in the joist ends. A very good correspondence between simulation and measurement was found for the temperatures. Only for the insulation plaster clear deviations could be seen. Also the profile of the relative humidity could be reproduced with a deviation of less than ~5 % RH at the end of the considered period. With some variations of the vapour resistances the general tendency of the measurement is depicted quite well by the simulations. Comparing the performance of the insulation systems with the same indoor conditions by simulations (not shown here) results in less differences then seen in the measured data. \\ | ||
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+ | The measured strong rising relative humidity in the second winter for the plaster and PU board are caused by an increase of the relative humidity level in the adjacent rooms to over 60 % RH. This was probably by the ventilation unit not working properly at that time. After the change of the filter a steep decrease of the humidity levels appeared. This makes two things clear: \\ | ||
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+ | * Indoor conditions are at least as important as the insulation system itself for the moisture level within the construction. | ||
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+ | * Especially in the context of interior insulation an air ventilation unit helps to limit the indoor RH and is necessary to achieve low humidity within the construction. \\ | ||
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+ | ===== References ===== | ||
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+ | Authors would like to thank the LUWOGE company for financing this project and for the good cooperation. Thanks to [[planning: | ||
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+ | **[Zaman 2010]** Zaman, | ||
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+ | **[Bräunlich 2013]** Bräunlich, | ||
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+ | **[BBS 2010]** Leimer, | ||
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+ | **[Nicolai 2010]** DELPHIN: | ||
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+ | **[Zimen]** Wettermessdaten vom Zimen-Luftmessnetz des Landesamtes für Umwelt, Wasserwirtschaft und Gewerbeaufsicht Rheinland-Pfalz, | ||
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+ | \\ | ||
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+ | ====== See also ====== | ||
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+ | [[planning: | ||
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+ | [[phi_publications: | ||
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+ | [[http:// |
planning/thermal_protection/thermal_protection_works/comparison_of_in_situ_measurements_and_hygrothermal_simulations_of_four_different_interior_insulation_systems/start.txt · Last modified: 2019/10/14 09:35 by cblagojevic