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.
The nuts, which grow in clusters like grapes, fall to the ground of their own accord when they are ripe. After the nuts fall, Elliott says you should remove the husks, which are similar to walnut husks, and then dry the nuts in the sun. She recommends that the nuts be sun-dried for three or four weeks.t has glossy green foliage and clusters of pretty white to pink blossoms that are pollinated by bees and other insects. The tree will reach a height of 30 feet and spread 15 to 20 feet. The macadamia is a long-lived tree that begins nut production five to seven years after planting.