Recent content by mechwill

  1. M

    Heat transfer coefficient of cylinder in free air?

    If the steel cylinder is the only heat source in the system without any fan but the system has small air circulation, it is a natural convection. The melting point for steel is around 1370 C, so theoretically, it will not melt. However, if you look at how the hot iron was taken out of the...
  2. M

    How long can I heat up a container?

    Now i see what you do with your spare time. haha
  3. M

    How long can I heat up a container?

    I think in order to maintain at the same level of temperature. Heat loss of the building needs to be performed. The calculation starts off with calculating the heat loss through the walls, roof, floor, windows, door, infiltration. The total amount of the heat that is loss from the room is known...
  4. M

    How long can I heat up a container?

    I haven't considered that option until you've mentioned it. That way you will circulate the hot and cold air in the room. The reason why i am asking this is because that i want to know how much electricity i am paying to have that heater running. Maybe if i know the time to heat up the room...
  5. M

    How long can I heat up a container?

    hi guys, I have a little cabin in my backyard. Recently, i have dug out a 1000 Watt air heater and installed in the cabin. I like to find out how long i need to run the heater to warm up to the room temperature of 21 ºC from the ambient of 12 ºC. Either the heater needs to be bigger or...
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