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.
Just for the record, the other big area where Tiger Nuts are grown and consumed in Nigeria in Africa. Third are an amazing couple of facts, Tiger Nuts have been a healthy food snack for over âFour Thousand Yearsâ and in fact, the Egyptians made them the worldâs first cultivated food.ust for the record, the other big area where Tiger Nuts are grown and consumed in Nigeria in Africa. Third are an amazing couple of facts, Tiger Nuts have been a healthy food snack for over âFour Thousand Yearsâ and in fact, the Egyptians made them the worldâs first cultivated food.