Double Face 2.0

Themes: Materials, Energy


A TRL is a measure to indicate the matureness of a developing technology. When an innovative idea is discovered it is often not directly suitable for application. Usually such novel idea is subjected to further experimentation, testing and prototyping before it can be implemented. The image below shows how to read TRL’s to categorise the innovative ideas.

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Double Face 2.0 offers an adjustable, lightweight and translucent alternative to current heavy and opaque Trombe walls to encourage wide-spread application. These passive facade elements save energy and stabilise room temperatures.


This novel Trombe wall applies an insulator (aerogel) and heat storage (phase change material) on either side of a rotatable element. In winter it captures, stores, and re-radiates heat from the sun (heating); in summer it captures internal heat (cooling).


The aim is to develop the concept into a computational designable element that can be tailored to and produced for any given design and environment. A first prototype has already been constructed and analysed.

Dr. ir. Martin Tenpierik


Dr. Michela Turrin

Tudor Cosmatu MArch

Fellow #2