Mechanical Engineering

The simplest ventilation system in a building uses external air as its source, the wind as its motive force, and openings in the external enclosure for fresh air intake on the windward side and stale air extraction on the leeward side . In a tightly constructed building, air infiltration is slow, but in a building […]

The simplest ventilation system in a building uses external air as its source, the wind as its motive force, and openings in the external enclosure for fresh air intake on the windward side and stale air extraction on the leeward side . In a tightly constructed building, air infiltration is slow, but in a building

It is unrealistic to rely on empirical rules to establish forms of constructions which provide satisfactory resistance to heat transfer as well as weather resistance, strength and stability and many of the other performance criteria. Moreover, current construction methods are generally less bulkythan those used years ago, as greatly reduced thicknesses of materials are employed

Primary Airflow Capabilities All primary air dampers can shut off the primary airflow completely. However, complete shutoff of primary airflow is not recommended if the VAV terminal unit serves a zone that has a heating load If the zone has a heating load, the primary air damper should be specified to have a minimum airflow

Both single-duct and fan-powered VAV terminal units have the same purpose, to provide heating, cooling, and ventilation to the temperature zone (group of spaces controlled by a single zone temperature sensor) that each VAV terminal unit serves. Physical Characteristics Primary Air Inlet Single-duct and fan-powered VAV terminal units have one (typically round) primary air inlet

Ductwork is used to convey air between the air systems and the terminal equipment and spaces which these air systems serve. Construction Common cross-sectional shapes for ductwork are rectangular, round, and flat oval. Rectangular ductwork is normally used for main ducts and runouts to air devices (air inlets and outlets) that have a rectangular neck.

Ductwork is used to convey air between the air systems and the terminal equipment and spaces which these air systems serve. Construction Common cross-sectional shapes for ductwork are rectangular, round, and flat oval. Rectangular ductwork is normally used for main ducts and runouts to air devices (air inlets and outlets) that have a rectangular neck.

Ductwork is used to convey air between the air systems and the terminal equipment and spaces which these air systems serve. Construction Common cross-sectional shapes for ductwork are rectangular, round, and flat oval. Rectangular ductwork is normally used for main ducts and runouts to air devices (air inlets and outlets) that have a rectangular neck.

For all cooling tower systems (open and closed-circuit), cooling water is pumped through the water-cooled equipment where it absorbs the heat rejected by the equipment. This water is then circulated to the cooling tower where it is cooled (directly or indirectly) mainly by the evaporation of a portion of the water that is in direct

Because cooling towers are frequently used to reject heat from water-cooled refrigeration equipment, the pipe conveying water from the cooling tower is often referred to as the condenser water supply pipe and the pipe conveying water to the cooling tower is often referred to as the condenser water return pipe. This is the naming convention