A building integrated solar thermal collector with active steel skins

• Published in: Energy and buildings 2019-10, Vol.201, p.134-147
• Main Author: Bock, M.
• Format: Article
• Language: English
• Subjects: Alternative energy sources; Building envelopes; Building integrated solar thermal system; Buildings; Climate change; Embedded systems; Emissions control; Energy; Energy consumption; Energy distribution; Energy technology; Environmental impact; Global warming; Green buildings; Greenhouse effect; Greenhouse gases; Heat exchangers; Heat pumps; Heat transfer; Hot water heating; Housing; Modular design; Net zero; Net zero energy buildings; Off-site construction; Pipework; Renewable energy technologies; Residential areas; Residential buildings; Residential energy; Retrofitting; Sandwich panels; Sandwich structures; Simulation; Skin; Solar collectors; Solar energy; Solar heating; Steel; Water distribution systems
• ISSN: 0378-7788; 1872-6178
• DOI: 10.1016/j.enbuild.2019.07.040

•The development of an energy generating sandwich panel and associated management system is presented.•Numerical simulations that were used to size all the elements of the system are presented.•Thermal tests of the cladding panel are reported.•Experimental validation of all the developed elements is also presented. There is currently a global need to reduce the emission of greenhouse gases. Since buildings are the largest contributor to global warming emissions, improving their energy performance through the implementation of renewable energy technologies is a way forward to reduce energy use and thus carbon footprint. This article presents a new building envelope system that harvests solar energy through the steel skin of the façade of the building. The energy is generated by a steel sandwich panel featuring a modular design that enables full integration into the building envelope of both new constructed and refurbished buildings. The heat transfer means is a glycol and water mixture that flows inside a pipework arrangement embedded into the sandwich panel and connected to a distribution system. This distribution system deploys the energy generated into a buffer tank for further production of heating, cooling and domestic hot water through the use of a heat pump. The elements of this solar system were developed under the framework of the Building Active Steel Skin Envelope (BASSE) project funded by the Research Fund for Coal and Steel (RFCS). A detailed description of the components of the BASSE system as well as how they were developed is presented. Building on satisfactory thermal testing and the successful implementation of the system on a pilot building, the BASSE system was validated. The experimental results have shown that the coefficient of performance (COP) of the heat pump is in between 4.1–4.6. A validated simulation tool estimated that the cladding panel generates 3321.14 kWh/year which is 30.4% efficiency. Simulation results showed that a 35 BASSE panel installation on residential buildings subjected to temperate climate are Net Zero Energy Buildings (NZEB).