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Recent content by denso1985

  1. denso1985

    BTU/hr calculation

    sorry if im not being really clear here. what im trying to do is evolving as i go along. basically what the system is trying to do is simulate the exhaust of a car. The box is the exhaust manifold and the pipe is the exhaust pipe. Heat affects our results (im not sure how much) so thats why...
  2. denso1985

    BTU/hr calculation

    maximum of 105 cfm airflow box volume is about 2880in3 what is the 1.08 in your equation?
  3. denso1985

    BTU/hr calculation

    ok, that makes much more sense. They are just using: Q=hA(T2-T1) and h is .25 in my case. Although, I hate the estimation. What I have is a rectangular box with a smaller 2.5 in. diameter tube attached (about 3 ft. long). The air will be blown into the rectangular box through the tube and...
  4. denso1985

    BTU/hr calculation

    I have a small container that I am looking to purchase a heater for that I can adjust the temp. Can someone help me with calculation for required BTU/hr? Details below. Surface Area: 9.388 ft2 Room Temp: 70F Desired temp in container: up to 750F Well insulated. Mcmaster Carr says this...
  5. denso1985

    Reducing heat transfer of aluminum brackets

    gloves obviously aren't an option. and touching metal soaked in cold air for an hour IS cold. its also a company policy that we cant stay in there for more than 15 minutes.
  6. denso1985

    Reducing heat transfer of aluminum brackets

    I perform testing in extreme cold temperatures (-20 degrees C). I use a camera to take video of my experiments and everytime we perform a test, I have to go into the chamber and fix the brackets my camera is mounted on to get the focus right (often takes a total time of 45-60 min inside...

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