ventilating rate
41Duct leakage testing — A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating, ventilating and air conditioning (HVAC) ductwork. A duct leakage tester consists of a calibrated fan for measuring an air flow rate and a… …
42Mining industry of South Africa — Premier Diamond Mine, Cullinan, Gauteng, South Africa Mining in South Africa has been the main driving force behind the history and development of Africa s most advanced and richest economy. Large scale and profitable mining started with the… …
43Wood fuel — is wood used as fuel. The burning of wood is currently the largest use of energy derived from a solid fuel biomass. Wood fuel can be used for cooking and heating, and occasionally for fueling steam engines and steam turbines that generate… …
44Scuba diving — Not to be confused with Self contained breathing apparatus, which describes breathing sets used out of water. Scuba diver Scuba diving ( SCUBA originally being an acronym for self contained underwater breathing apparatus, now widely considered a… …
45Stack effect — is the movement of air into and out of buildings, chimneys, flue gas stacks, or other containers, and is driven by buoyancy. Buoyancy occurs due to a difference in indoor to outdoor air density resulting from temperature and moisture differences …
46Passive cooling — refers to technologies or design features used to cool buildings without power consumption, such as those technologies discussed in the Passive house project.Passive coolingThe term passive implies that energy consuming mechanical components like …
47AUSCHWITZ — (Oświęcim), Nazi Germany s largest concentration and extermination camp. The word Auschwitz has become a metaphor for the Holocaust in general, and the phrase after Auschwitz has come to signify the great historical rupture wrought by the murder… …
48Mass transfer — Part of Chemical engineering History Concepts Unit operations Unit processes Chemical engineer Chemical process Process integration Unit operation …
49Pump — For information on Wikipedia project related discussions, see . A pump is a device used to move gases, liquids or slurries. A pump moves liquids or gases from lower pressure to higher pressure, and overcomes this difference in pressure by adding… …
50Gas compressor — A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume. Compressors are similar to pumps: both increase the pressure on a fluid and both can transport the fluid through a pipe. As gases are… …
