Design challenges for a climate adaptive multi-functional lightweight prefab panel for energy-efficient retrofitting of residential building based on one-room model simulations
conference paper
Current solutions for highly energy-efficient retrofitting rely on thick static insulation, airtight construction and extensive ventilation systems to become independent from variable outdoor conditions. A building skin that adapts to the outdoor conditions to regulate the indoor conditions could provide an interesting alternative for current retrofitting practice. This alternatÃve is called ADAPTIWALL and consists of three key components: adaptive insulation; a lightweight concrete buffer and, a total heat exchanger. Many possible configurations of ADAPTIV/ALL have been simulated in a one-room model, based on a typical Dutch reference dwelling. In TRNSYS simulations, heating demand has been reduced by over 70% by applying ADAPTIWALL compared to an energy-efficient retrofit solution with static insulation. It has been demonstrated in the simulations that this requires solar heat to be effectively stored in the buffer. For this, a glass cladding is shown to be very effective. In addition, the adaptive insulation should either allow passage or actively transfer the solar heat gains to the buffer. The buffer should preferably have a high heat capacity at a low density. Development of the total heat exchanger could boost the energy savings even further. These material design challenges will be met within the ADAPTIWALL project.
TNO Identifier
505788
Source title
ICBEST 2014, Building for a Changing World, 9-12 June 2014, Aachen, Germany
Collation
15 p.
Files
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