Convection oven

A general-purpose oven that cooks food by forcing hot dry air over the surface of the food product. The rapidly moving hot air strips away the layer of cooler air next to the food and enables the food to absorb the heat energy.

The motion of the air inside the oven results in faster cooking by transferring higher temperatures to the surface of the food. Both will accelerate cooking as well as enhances the browning and crisping of the surface of your food.

Air convection oven is suitable and widely used for baking cookies, in particular Danish Butter Cookies.

In term of terminology, convection is the mechanism of heat transfer through a fluid in the presence of bulk fluid motion. Convection is classified as natural (or free) and forced convection depending on how the fluid motion is initiated.

The moving fluid carries the heat and deposits it on the surface or draws it out of the surface.
Convection oven

Microwave oven technology

The microwave oven is an electronically controlled home appliance used for cooking. It uses the principle of dielectric heating at microwave frequencies. The frequency of microwaves is 2459 MHz.

Microwave heating has several industrial applications such as product drying and large-scale heating and processing, but the main application is in household and commercial cooking.

A microwave oven works because the microwaves pass through the food container and into the food. They can pass easily though most kinds of plastic, paper, glass and any pottery or china without metal trim, paint or glaze.

The microwaves are generated in the cooking cavity. These microwaves are reflected from the walls of the cavity and strike the food. Because of these high frequency waves the heat is induced inside the food. The temperature increases much faster than the conventional cooking.

The heat is conducted inside the food and it is cooked in short time. Although microwaves will generally not damage cooking utensils, it is important to remember that the heat of the food may sometimes do so. For example: syrup heated in a glass utensils would reach such a high temperature that the glass would break.
Microwave oven technology