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  1. jim hatfield

    Static pressure small tube

    I WASNT SHOUTING I USE ALL CAPS MOST OF THE TIME DUE TO A DISABILITY ITS REAL HARD TO USE SHIFT AND TYPE WITH MY MESSED UP HANDS...COMBAT INJURY. ACTUALLY MY BUDDY TYPED THE FIRST FEW POSTS BECAUSE I AM SICK AND TIRED OF PEOPLE THINKING IM YELLIN. IVE GOT IT FIGURED OUT I AM GOING ORDER A CHEAP...
  2. jim hatfield

    Static pressure small tube

    THERE ARE OTHER COOLING AFFECTS TAKING PLACE NATURAL CONVECTION AND ENCLOSURE ITSELF. THESE LASTED ABOUT 7 YEARS, ONE OF THE POWER CENTERS TRANS FORMER FINALLY FAILED DUE TO HEAT. THEY WANT US TO COME UP WITH A SOLUTION. WE ARE PULLING AIR THROUGH THE DUCTS IN THE COILS WITH THIS SETUP I AM...
  3. jim hatfield

    Static pressure small tube

    Irstuff, actually i have to deal with 90Kw losses but that is not what i need i just need to calculate the static pressure the fans will be dealing with. Thanks man.
  4. jim hatfield

    Static pressure small tube

    Sorry for my lack of knowledge but I have searched and searched to no avail. I am in a unique situation. I have to figure out how to cool a 4000kva transformer in a existing coal mine power center. I am going to have a tube above the coils on this transformer with holes cut out above each coil...
  5. jim hatfield

    Natural convection

    I am designing a tunnel boring machine power center. Ive been able to calculate ventilation for natural convection but the customer wants filters. I need to know how to combine the static pressure of the filters with the ventilation open area. Anyone know how this is done?

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