'Breathing Wall(BW)' developed in Japan has been studied continuously as a member capable of satisfying the required ventilation amount by natural ventilation. The natural ventilation skin combined with BIPV in this study was proposed to apply BW to domestic residential buildings. It has been confir...
'Breathing Wall(BW)' developed in Japan has been studied continuously as a member capable of satisfying the required ventilation amount by natural ventilation. The natural ventilation skin combined with BIPV in this study was proposed to apply BW to domestic residential buildings. It has been confirmed that structural improvement of performance is necessary to apply to domestic residential buildings. In order to satisfy the same amount of ventilation as BW in Japan, it should be designed as a member having a large opening ratio according to a relatively small opening area which can be applied to a housing of domestic residential buildings. Therefore, even in the same outdoor condition, the system proposed in this study may cause a ventilation load depending on a strong inflow air volume, and may cause a phenomenon of hindering a room heat sensation such as a cold draft. In order to overcome this problem, this study proposes a member with excellent ventilation load reduction performance under the same ventilation conditions as BW through the design of exterior materials and interior materials. Exterior material is designed as a louver type PV panel with adjustable angle. By adjusting the angle of the louver, it can be adjusted to have excellent solar radiation conditions of the PV panel. In addition, it acts as a damper which can adjust the indoor air flow rate to the core portion according to the outdoor condition, and can be controlled so as not to ventilate the room by closing the louver in the contaminated outdoor condition. The PV panels are used as power to reduce ventilation load due to natural ventilation through electric power generation, and to provide power to the preheating system to take on the active function of the system. Interior material is a preheating system composed of a constant temperature wire and an interior finishing material applied to reduce ventilating load during the winter when the outdoor temperature difference is severe. The preheating system of the interior material is designed to have a power consumption less than that of the preheating system so as not to require additional power in a manner operated by the power produced by the PV panel of the exterior material. When the preheating system of the winter interior material is activated, the outside air is heated and flows to the same or higher temperature than the room temperature, so that the ventilation load is not generated, and furthermore, the room heating effect can be expected.
The natural ventilation skin combined with BIPV consisting of the exterior material, the core part and the interior material can be expected to have a synergistic effect by the combination of the respective components. The combination of the exterior material and the core part enables the ventilation load to be reduced by introducing the air generated by the heat generated by the PV panel of the exterior material in winter in the natural ventilation side through the core part, It is possible to suppress the heat generation of the PV module, thereby improving the power generation efficiency. Next, the power generated from the exterior material is used as the energy of the preheating system of the interior material, which is a zero energy type ventilation system. The remaining power can be applied to mechanical devices for opening / closing the front casing and sensors for sensing outdoor conditions.
Therefore, the natural ventilation skin combined with BIPV based on BW is the passive function of ventilation aspect which is advantage of BW (natural ventilation system that satisfies annual required ventilation + reduction of ventilation load by heat exchange inside member) It is considered that the new ventilation system can be applied to the residential buildings by the active function by the element (suppressing the heat of the PV panel, suppressing the ventilation load by the preheating system, and heating the room). However, a number of limitations and further research are needed to apply the natural ventilation skin combined with BIPV to residential buildings. In the case of the heating period, the arrangement of the rear air layer by the heat of the PV module causes the temperature of the indoor inflow air to rise, thereby reducing the ventilation load. On the other hand, in the case of the air conditioner, the natural ventilation in the member is performed at a temperature similar to that of the natural ventilation through the outside air, but it is necessary to search for a method of exhausting the rear side arrangement through future studies.
'Breathing Wall(BW)' developed in Japan has been studied continuously as a member capable of satisfying the required ventilation amount by natural ventilation. The natural ventilation skin combined with BIPV in this study was proposed to apply BW to domestic residential buildings. It has been confirmed that structural improvement of performance is necessary to apply to domestic residential buildings. In order to satisfy the same amount of ventilation as BW in Japan, it should be designed as a member having a large opening ratio according to a relatively small opening area which can be applied to a housing of domestic residential buildings. Therefore, even in the same outdoor condition, the system proposed in this study may cause a ventilation load depending on a strong inflow air volume, and may cause a phenomenon of hindering a room heat sensation such as a cold draft. In order to overcome this problem, this study proposes a member with excellent ventilation load reduction performance under the same ventilation conditions as BW through the design of exterior materials and interior materials. Exterior material is designed as a louver type PV panel with adjustable angle. By adjusting the angle of the louver, it can be adjusted to have excellent solar radiation conditions of the PV panel. In addition, it acts as a damper which can adjust the indoor air flow rate to the core portion according to the outdoor condition, and can be controlled so as not to ventilate the room by closing the louver in the contaminated outdoor condition. The PV panels are used as power to reduce ventilation load due to natural ventilation through electric power generation, and to provide power to the preheating system to take on the active function of the system. Interior material is a preheating system composed of a constant temperature wire and an interior finishing material applied to reduce ventilating load during the winter when the outdoor temperature difference is severe. The preheating system of the interior material is designed to have a power consumption less than that of the preheating system so as not to require additional power in a manner operated by the power produced by the PV panel of the exterior material. When the preheating system of the winter interior material is activated, the outside air is heated and flows to the same or higher temperature than the room temperature, so that the ventilation load is not generated, and furthermore, the room heating effect can be expected.
The natural ventilation skin combined with BIPV consisting of the exterior material, the core part and the interior material can be expected to have a synergistic effect by the combination of the respective components. The combination of the exterior material and the core part enables the ventilation load to be reduced by introducing the air generated by the heat generated by the PV panel of the exterior material in winter in the natural ventilation side through the core part, It is possible to suppress the heat generation of the PV module, thereby improving the power generation efficiency. Next, the power generated from the exterior material is used as the energy of the preheating system of the interior material, which is a zero energy type ventilation system. The remaining power can be applied to mechanical devices for opening / closing the front casing and sensors for sensing outdoor conditions.
Therefore, the natural ventilation skin combined with BIPV based on BW is the passive function of ventilation aspect which is advantage of BW (natural ventilation system that satisfies annual required ventilation + reduction of ventilation load by heat exchange inside member) It is considered that the new ventilation system can be applied to the residential buildings by the active function by the element (suppressing the heat of the PV panel, suppressing the ventilation load by the preheating system, and heating the room). However, a number of limitations and further research are needed to apply the natural ventilation skin combined with BIPV to residential buildings. In the case of the heating period, the arrangement of the rear air layer by the heat of the PV module causes the temperature of the indoor inflow air to rise, thereby reducing the ventilation load. On the other hand, in the case of the air conditioner, the natural ventilation in the member is performed at a temperature similar to that of the natural ventilation through the outside air, but it is necessary to search for a method of exhausting the rear side arrangement through future studies.
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