Recent content by Umar Awan

  1. Umar Awan

    Fractional distillation calculations

    Say I have got a super cooled cylinder of half hydrogen and half helium. This cylinder has a pressure of 100,000 Pascal's. At this pressure, hydrogen boils at 20 Kelvin and helium at 4.21 Kelvin. I hope to separate helium by cooling gas down to 4.21 Kelvin but I know that even at the...
  2. Umar Awan

    Is it current or voltage that is fixed in transformer output

    Also Tom. [O]G. Great stuff this temperature coefficient of resistance table. [Like emogy]
  3. Umar Awan

    Is it current or voltage that is fixed in transformer output

    Guys Thank you! All of you. This has probably been the most productive discussion of my life. Now I have another question going on in my head: The reason we use a high current transformer is because plugging a low resistance heating element directly into a power supply( e.g. 1 ohm), will pull a...
  4. Umar Awan

    Is it current or voltage that is fixed in transformer output

    Refering to my earlier reply to you. I just experimented with parameters set by my requirements and my afore mentioned requirements and I noticed that with 57.6 output voltage, I could get an output of 18 amperes. These many amperes would be sufficient to provide 1036.8 Watts (Taken formulate...
  5. Umar Awan

    Is it current or voltage that is fixed in transformer output

    Thank you!*I mean it!* My "mc delta t" 's and "p=j/s" 's give me a power requirement of 1030 watts... My calculation of the resistance(Its a very thin foil) of the tungsten foil gives me a value of 3.2 ohms resistance. I also need to heat this foil to about 1050 Celcius in about 3 minutes...
  6. Umar Awan

    Is it current or voltage that is fixed in transformer output

    In a transformers output, is it the current that is fixed or the voltage? I have been trying to resisitively heat some tungsten foil and I am stuck at trying to find out the amount of current I need in my transformers output. The problem I am facing is that I know that the tungsten resistivity...
  7. Umar Awan

    What is the reason for using high KVA transformers in electrical heaters?

    Note: I have a feeling this is below Electrical Engineering requirements, but I couldn't find a more suitable category, so I think I'll extort the advantages of a forum base with electrical understanding more than I think may be required(ofcoarse I know very little about the field, so I may fall...
Back
Top