high-pressure hot water heating
121chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… …
122energy conversion — ▪ technology Introduction the transformation of energy from forms provided by nature to forms that can be used by humans. Over the centuries a wide array of devices and systems has been developed for this purpose. Some of these energy …
123Compressed air energy storage — Conceptual representation of the compressed air energy storage concept. Off peak (low cost) electrical power compresses air into an underground air storage “vessel” (the Norton mine), and later the air feeds a gas fired turbine generator complex… …
124Cooking — This article is about the preparation of food by heating. For food preparation generally, see Food preparation. Modern fruit salad and a Russian cigarette pastry stuffed with cottage cheese Cooking is the process of preparing food by use of heat …
125Samarium — promethium ← samarium → europium ↑ Sm ↓ …
126Refrigeration — Commercial refrigeration Ice is used to refriger …
127Pebble bed reactor — Sketch of a pebble bed reactor in Italian …
128Coal gas — Towngas redirects here. For the company in Hong Kong trading as Towngas , see The Hong Kong and China Gas Company Limited. See also: Coal gasification and Coal seam gas Coal gas (also town gas and illumination gas) is a flammable gaseous… …
