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 lilies are well-known as the orange-spotted lily that grows in ditches across North America. The roots of the lilies were eaten by Native Americans. The lilies are also popular in Asian dishes, with the flower being also edible. Medicinally, tiger lilies are believed to relieve congestion and nausea. Most lilies, including the tiger lily, are grown from bulbs. However, the tiger lily can also be grown from seeds harvested from the plants.