Diffusers
Room heat gains and losses are automatically computed when a room is selected and the required air volume for the room is calculated. Individual ceiling diffusers, wall grilles and floor diffusers can be positioned in the room. A ceiling diffuser grid layout can automatically be set up in a room, using commercial diffusers, by scanning a database of diffuser data, using key design information such as volume, velocity and throw to determine the required number and layout of diffusers. Diffuser throw patterns are shaded on the drawing to show coverage. |
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Ductwork
Ductwork can be drawn schematically, snapping to inlet/outlets. Default bends and tees are used, so duct runs can be drawn very quickly as single line systems. Ductwork is drawn in 2D, with a default height. Snapping above outlets automatically inserts vertical ducts, enabling 3D systems to be drawn on the 2D plan. Systems are sized in part or whole, this generates duct sizes and pressure drops and automatically constructs the complete 2D and 3D system drawings, using a standard library of components. After any system changes, a single resize command will automatically regenerate the complete 2D and 3D drawings. When building or room data changes during the project, a powerful single command automatically recomputes room loads, computes air volumes and resizes all the current ductwork systems. A complete acoustic analysis is carried out when ductwork systems are sized. NR contours from duct systems can optionally be shown directly on the drawing. |
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Heating and Chilled Water
Radiators and heat emitters can be sized using extensive manufacturers’ databases. A powerful additional feature lets radiators be automatically sized and positioned in groups of rooms, using constraining data such as sizing strategy, maximum length, and so forth. Pipework is drawn as a single line schematic, representing flow pipe, return pipe or both simultaneously. Systems are automatically tracked, analysed and sized using standard pipe sizing methods for 2 pipe, reverse return or general pipe systems. Radiator and emitter valves can be specified from a manufacturers’ product database. Pipe headers can be set up, enabling micro-bore systems to be designed. |
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HWS and CWS
Outlets can be placed in rooms, snapping to walls if required. Diversity is automatically taken into account using standard loading units for outlets. Pipe systems are drawn as single line schematics, HWS return pipes can be specified with the schematic and a pump duty will be computed. CWS systems can include mains water, cold water tanks and tanked water, enabling complete water system analysis to be carried out from a single cold water supply point. HWS systems can include cylinders, which can link back to the CWS system. |
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Additional Advantages
Bentley Hevacomp Mechanical CAD utilizes the Mechanical Designer load calculations, duct and pipe sizing. Manufacturers’ information is available throughout the package, using a Help! button, which links to the Help! CD. Component schedules are produced for diffusers, radiators, coils and water outlets. Quantities schedules are produced for pipe and duct systems. Notes can be added to pipes and ducts to show sizes, properties and lengths. Notes are dynamic and automatically updated at system calculation time. Multi-floor isometric views of the system are available at any time. A full 3D rendered visualisation of the building and services can be displayed at any time. Services systems drawings can be automatically saved in AutoCAD or exported as DXF files. A full printer/plotter module is provided, which prints or plots drawings to any paper size. |
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