Attention Deficit Disorder Prosthetic Memory Program

Yakhchāl

ADDPMP606
Yakhchāl - © Attention Deficit Disorder Prosthetic Memory Program

An ancient Persian ice house, used since the 1st millennium BC; the ancestor of the modern refrigerator. The ice created and stored in the yakhchāl was used to store food.

The yakhchāl is a dome, up to 18-metre (59-feet) high, completed by a large subterranean storage space, up to 5,000 m3 (180,000 cu ft) in volume. This allows cold air to pour in from entries at the base and descend to the lowest part of the structure, while the tall conical shape guides any remaining heat upward and outside through openings at the very top of the building. Through the active process the air inside the yakhchāl remains cooler than the outside. The yakhchāl is built of a thick (up to 2 metres (6.6 feet)) mortar composed of sand, clay, egg whites, lime, goat hair and ash, that is heat- and water-resistant.

The yakhchāl is connected to an aqueduct (“qanat”) and mainly built in high altitude deserts, in low humidity and low night temperature conditions, to promote the freezing of the channeled water.

Yakhchāl - © Attention Deficit Disorder Prosthetic Memory Program
Yakhchāl - © Attention Deficit Disorder Prosthetic Memory Program
Visions of Mars - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP422
Visions of Mars
The Anarchist Cookbook - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP390
The Anarchist Cookbook
Garden of Cosmic Speculation - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP238
Garden of Cosmic Speculation
MV Blue Marlin - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP205
MV Blue Marlin
Wow! Signal - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP446
Wow! Signal
Transocean Winner - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP249
Transocean Winner
Elephant's Toothpaste - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP473
Elephant's Toothpaste
Exploding Head Syndrome - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP532
Exploding Head Syndrome
Photovoltaic Panels - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP542
Photovoltaic Panels
Ophiocordyceps unilateralis - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP503
Ophiocordyceps unilateralis
Hawk-Eye Technology - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP571
Hawk-Eye Technology
Seattle Kingdome Demolition - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP173
Seattle Kingdome Demolition

You are using an outdated browser.
Please upgrade your browser to improve your experience.