Electrical LT Distribution Room Ventilation

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Anonymous Poster #1	Electrical LT Distribution Room Ventilation 06/30/2020 2:48 PM
	How to select the number of exhaust fan required. Fan size-450mm. Room is 4.5 meter × 3.7 meter x 3.5 meter height. 15kva ups and 60kw lt distribution supply at 415vac 3 phase is fed from here. Loads are located at field which is outside of the room.
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Doorman Guru Join Date: Apr 2009 Location: Yellowstone Valley, in Big Sky Country Posts: 7425 Good Answers: 295	#1 Re: Electrical LT Distribution Room Ventilation 06/30/2020 3:02 PM
	This 450mm fan - what is the rated volume of air moved per minute, please? What is the free area of the proposed air intake grilles? Is this room a stand alone building? Is this room in Equador (warm) or Yukon Territory (cold)? __________________ Semper Ubi Sub Ubi
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Anonymous Poster #1	#3 In reply to #1 Re: Electrical LT Distribution Room Ventilation 06/30/2020 6:13 PM
	6200 m3/hr Air intake from main door 1200mm × 2500mm. No windows. Equatorial.
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#4 In reply to #3 Re: Electrical LT Distribution Room Ventilation 06/30/2020 11:50 PM
	You seem to have a fan that is driven at high speed, it should be slower,, much slower....by my calculation you are changing the air in less than a minute when only a tenth is required to be changed per min...Your exhaust fan should be as near the top of the room as possible, opposite the door intake... https://www.ashrae.org/File%20Library/Technical%20Resources/Standards%20and%20Guidelines/Standards%20Intepretations/IC_62-1-2007-17.pdf __________________ All living things seek to control their own destiny....this is the purpose of life
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#5 In reply to #3 Re: Electrical LT Distribution Room Ventilation 07/01/2020 2:48 AM
	What is the risk of pulling rain into the room, especially at <tap, tap, tap, press equals...> 106 air changes per hour? __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#2 Re: Electrical LT Distribution Room Ventilation 06/30/2020 5:02 PM
	https://www.electrical-installation.org/enwiki/Ventilation_in_MV_Substations __________________ All living things seek to control their own destiny....this is the purpose of life
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Anonymous Poster (1); Doorman (1); PWSlack (1); SolarEagle (2)

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