Active and passive beam application design guide by -

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"This e-book presents instruments and suggestions to layout, fee, and function lively and passive beam structures to accomplish a decided indoor weather. It additionally provides examples of lively and passive beam calculations and selections"--

summary: "This booklet presents instruments and tips to layout, fee, and function lively 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 resources for Active and passive beam application design guide

Example text

Beam systems are designed to operate dry and do not include filters or condensation collection drains and pipes which require cleaning. 1 Draught Firstly, check that the room air temperature is not too low. Secondly, check that the airflow rate is not too high or too low. Too high an airflow rate may create draught near the floor. Conversely, if the airflow rate is too low or too cold, the air jet may fall unintentionally downwards, which may create draught at the neck level. 2 High Room Air Temperature The following steps should be taken if a high room air temperature report is received: 1.

1 ; (Rp x NP + Ra x A) Note the significant difference between the two standards in ventilation airflow requirements. 2 PRIMARY AIRFLOW REQUIRED FOR MOISTURE CONTROL The water vapour addition to the indoor air is generated by the occupants’ metabolisms. The following table (Table 9-1) shows the mass of water vapour generated per unit time and per person based on the degree of activity. The mass flow of water vapour generated by the occupants, in pounds per hour (grams per second), is simply calculated by the multiplication of the number of people by the water vapour generation per person.

The primary water flow in the heat exchanger is modulated to maintain the beam chilled-water supply temperature; this is used when there are several uses of the primary chilled-water circuit. Beam chilled-water temperature control is a closed-loop control system in which the supply water temperature is controlled via adjustment of the water flow through a two- or three-way control valve or heat exchanger installed on the suction side of the pump. In this application, the use of modulating FIGURE 10-5 Open-loop beam chilled-water system supply temperature maintained by mixing primary and secondary chilled water (three-way valve and bypass).

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