TAILIEUCHUNG - INDUSTRIAL VENTILATION Episode 5

Tham khảo tài liệu 'industrial ventilation episode 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | UFC 3-410-04N 25 October 2004 Vertical Distribution Method. Design a drop ceiling with perforated plate to form a plenum in accordance with paragraph . Horizontal Distribution Method. Design the wall plenum to cover the entire wall opposite the hoods. Size the open area of the perforated sheet for m s 2 000 fpm through the holes. See Figure 4-13 for more details. Heating and Air Conditioning. Design heating air conditioning and humidity control according to MILHDBK 1003 3. Temper the replacement air to provide a minimum winter design temperature of 18 oC 65 oF and a maximum summer design temperature of 24 oC 75 oF with a maximum relative humidity of 50 percent. Do not separate the air conditioning system from the replacement air system. See paragraph for criteria on heat recovery systems. Do not re-circulate exhaust air. 4-4 SYSTEM CONTROLS. Design system controls in accordance with paragraph 2-5 and the following a. Position an annunciator panel at the entrance to the space with a potential for personnel exposure so operators can monitor operating gauges. b. Install static pressure sensors at locations that are representative of average static pressure in each controlled space. This will ensure that desired differential pressures are maintained. c. Trigger a timer if the pressure varies from the specified range. Select a timer that automatically resets if the problem is corrected within 60 seconds. d. Trigger both visible and audible alarms if the system cannot correct the difficulty within the allotted time. 4-5 SAFETY AND HEALTH CONSIDERATIONS. 29 CFR 1910 requires specific criteria for the safety and health of operators. The physical nature of the work and the use of protective clothing increase the potential for heat stress. Consider cooling the replacement air to reduce this potential. Refer to NAVSEA S6340-AA-MMA-010 Otto Fuel II Safety Storage and Handling Instructions for complete operational considerations. .

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