Heat transfer always occurs from a region of high temperature to another region of lower temperature. Heat transfer changes the internal energy of both systems involved according to the First Law of Thermodynamics.
Cyperus esculentus (also called chufa sedge, nut grass, yellow nutsedge, tiger nut sedge, or earth almond) is a crop of the sedge family widespread across much of the world.It is native to most of the Western Hemisphere as well as southern Europe, Africa, Madagascar, the Middle East and the Indian Subcontinent.n Spain, C. esculentus is cultivated for its edible tubers, called earth almonds or tiger nuts, for the preparation of  horchata de chufa, a sweet, milk-like beverage. However, in most other countries, C. esculentus is considered a weed.
tiger nuts. Â« on: September 20, 2008, 16:54 Â». Has anyone successfully tried growing tiger nuts (AKA Chufa). THey make a delicious drink out of them in Spain called Horchata and id like to try growing them as they sound easy-just a small nutlike tuber which gives a grasslike foliage and harvest in autumn. Reply #3 on: September 20, 2008, 19:41 Â». sounds interesting. The Tiger nut is not really a nut but a small tuber first discovered some 4000 years ago. It has many other names like Zulu nut, yellow nutgrass, ground almond, edible rush and rush nut.In Spain it is very popular and is known as Chufa.