Everybody’s a winner (MIT)
Two students who invented a window that can automatically deploy a set of
internal blinds to prevent a room from overheating on hot summer days won the
$10,000 first prize in this year’s Making And Designing Materials Engineering
Competition (MADMEC), which took place Thursday evening.
The window, called iReflect, developed by graduate students Elizabeth Rapoport
and Ahmed Al-Obeidi of the Department of Materials Science and Engineering
(DMSE), has strips of infrared-blocking film in the space between its two
panes. When warmed by sunlight, the strips unfurl to block some of the
incoming light — especially the infrared light responsible for most heating —
while still allowing occupants to see out.
The principle is simple, and similar to the bimetallic strips used in typical
thermostats: Two materials with different thermal characteristics (the rate at
which they expand when heated) are bonded together. When the temperature
changes, one material expands more than the other, causing the bonded strips
to curl or uncurl.
“In winter, we wanted to allow the sun to shine through,” Rapoport explains,
“and in summer, to block it” — or at least enough of it to prevent too much
heating of the air inside. The system …
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