Scientists in China have designed a self-insulated composite outdoor wall panel, in which a solar collector panel, PV panel and insulation card are integrated. The proposed experimental attitude is said to have a static payback period of 1.1 years.
Researchers from China have proposed a new self-informing composite outdoor wall panel for solar-self-inspired composite for applications in buildings.
The system integrates a solar collector panel, PV panel and insulation card in a single unit to deliver hot air indoors. It is the fourth generation of this mechanism developed by the same group, which has now been improved with the full housing of the system and the addition of a PV panel.
“This study encloses the solar collector panels with glass and replaces the lower exposed collection panels with PV panels. This design reduces heat disiperation and offers electricity for the ventilator of the solar hour system,” the group said. “The composite of the exterior wall unit is designed with modularity to accommodate various facade window and column sizes, so that the use of the facade area is maximized.”
The first layer of the new design is an internal plaster, followed by an autoclaved aerated concrete panel of 150 mm thick. It follows with a 30 mm layer of stone woolboard insulation and an air slit of 80 mm. A thermal solar collector with a slope of 36 ° is then installed. It consists of a steel or aluminum plate coated with a high absorbent coating with heat transfer, perforated with many small holes.
The researchers explained that grid electricity was used to pump hot air into the rooms that needed it, with PV panels being admitted for the first time. A small part of the modules is used to supply the fan with power that extracts the heated air. Air inlets, tailor -made according to the heating requirements of the room and air change, are located on both sides of the PV panels. These coves rely on dust filters to ensure that the outside air passes through the solar collector panels is purified.
After designing this system, the team simulated it using the smooth software. They simulated nine hours on both sunny winter and sunny summer days and measured the air exit temperatures. In addition, an experimental design was also built and installed in an open area in Qingdao, China, for measurements on 4, 7 and 8 December 2024.
“The PV panel nutrition system uses a 12 V ventilator with RPM of 4,500 and a maximum air volume of approximately 35.963 m3/h, powered by a 720 mm x 540 mm monocrystalline 60 W 18 V PV panel, a 12 V controller and two 12 AH -Batterijen, explained, Batteries, explained, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries, Batteries Batteries “The solar collector panel consists of steel plates (2 mm) with different heat exchange holes ranging from 0.5 mm to 3 mm and an opening speed of 0.1%-10%.”
The simulations showed that, during sunny winter days, the average temperature rise at the exhaust was 41.33 ° C, which is 20.1 C higher than the partially exposed configuration and 22.55 ° C higher than the fully exposed configuration. In the summer, the average temperature rise on a sunny day is 54.33 ° C, an increase of 21.77 ° C, compared to the partially exposed configuration.
However, the average temperature rise on the experimental arrangement was 41.23 C, 40.93 C and 40.88 ° C respectively for the three test days, while the simulated average temperature rise 41.33 C. “The experimental and simulated data exhibit a strong agreement in their general trends,” the Arademics noticed.
“The composite of the exterior wall panel unit achieves considerable energy saving. The calculated building heating load and heating cabbage consumption indicates an energy saving speed of 65.47%. The static payback time is 1.1 years,” they concluded. “The retrof -enrolled composite outdoor wall panels can be designed as modular units of different sizes for use in prefabricated buildings. These panels are compatible with various structural systems, including steel structures, reinforced concrete frames and wood structures.”
The system was described in “Optimized design and thermal performance study of composite wall panels of solar heat composite“Published in Frontiers of architectural research. Academics of the Chinese Shandong University of Science and Technology and Shandong Jianzhu University have conducted the study.
This content is protected by copyright and may not be reused. If you want to work with us and reuse part of our content, please contact: editors@pv-magazine.com.
