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ISBN-10: 1936504839

ISBN-13: 9781936504831

"This ebook presents instruments and advice to layout, fee, and function lively and passive beam platforms to accomplish a decided indoor weather. It additionally offers examples of lively and passive beam calculations and selections"--

summary: "This booklet offers instruments and tips to layout, fee, and function energetic and passive beam platforms to accomplish a made up our minds indoor weather. It additionally offers examples of lively and passive beam calculations and decisions"

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Extra info for Active and passive beam application design guide

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51 Active and Passive Beam Application Design Guide Window contact switches can detect if a window is open. Alternatively, moisture sensors, such as that shown in Figure 10-8, may be used to discontinue the chilled-water flow during periods of condensation risk. When these sensors are applied, one sensor should be installed on the chilled-water supply pipe in each room (with operable windows or doors) the system serves. It must be remembered that the chilled-water flow will not be restored until the sensor determines that all moisture has been evaporated from the surface of the pipe.

Management of the skin envelope load in hot and cold climates is facilitated by washing it with conditioned air. In more extreme, colder climates it may be necessary to consider an alternate heating system at floor level along the perimeter or glazing with a low U-factor. , 25% of the flow towards the glazing and 75% towards the inner, occupied area or the other way around, as required). An active chilled beam for each potential partition location (module) allows the room to be divided in a flexible manner during the initial tenant fit-out and for future changes.

Often on/off control valves are used together with time-proportional action to produce an effect similar to a modulating control valve. The control action can be on/off or modulating. For modulating, proportional (P) or proportional integral (PI) algorithms can be implemented. The selection of the control system type depends on the load profile, zone use, building type, and/or design flow rates, among other considerations. On/off control may cause significant fluctuations in the delivered air temperature of active beams, leading to swings in room conditions.

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