How Energy Is Spread In An Electric Kiln

In summary, the conversation discusses the various ways in which heat is transferred from a coil wire in a kiln to the material being heated. These include conduction, convection, and radiation. It is mentioned that the flux of thermal energy will eventually reach a constant point, but if not controlled or turned off, the temperature will continue to rise and potentially cause the heating element to melt. It is also noted that there is thermal energy leaving the kiln, which can affect the overall temperature. The importance of following safety guidelines, rather than relying on the kiln's manual, is emphasized.
  • #1
Blue Crystal
1
0
Heat from the coiled wire is transferred in three possible ways: conduction (through physical contact of the heating element and the material being heated); convection (through the air movement in the kiln); and by radiation (directly from the elements to the material being heated).

It seems to me that at some point the flux of thermal energy flowing from the resistors will become almost constant. But this thermal energy keeps accumulating in the air, in the walls and other objects inside the kiln and, as consequence, the temperature will keep increasing until the the heating elements melts down if a controller does not intervine or nobody turn the swtch off.

Is my view on this heating process correct ?
 
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  • #2
You also have thermal energy leaving the outside of the body of the kiln. If those heat losses reach the thermal input of the heating element before it melts you will also get to a steady state. Unless specifically stated in the manual for the device I would not rely on it for safety purposes.

BoB
 

FAQ: How Energy Is Spread In An Electric Kiln

1. How does an electric kiln distribute heat?

An electric kiln distributes heat through a combination of conduction, convection, and radiation. The heating elements within the kiln transfer heat through conduction to the surrounding air and objects. The heated air then rises and circulates through convection, distributing the heat evenly throughout the kiln. Finally, the heated objects within the kiln emit infrared radiation, which also contributes to the overall heat distribution.

2. What role do kiln shelves play in the distribution of heat in an electric kiln?

Kiln shelves help to evenly distribute heat within an electric kiln by acting as a barrier between the heating elements and the objects being fired. The shelves absorb and radiate heat, creating a more even distribution of heat throughout the kiln. They also help to prevent hot spots and protect the objects from direct contact with the heating elements.

3. How does the placement of objects within an electric kiln affect the distribution of heat?

The placement of objects within an electric kiln can significantly impact the distribution of heat. Objects placed near the heating elements will experience more direct heat and may reach higher temperatures, while objects placed further away may not reach the desired temperature. It is essential to consider the size and shape of objects when arranging them in a kiln to ensure even heat distribution.

4. What factors can affect the distribution of heat in an electric kiln?

Several factors can affect the distribution of heat in an electric kiln, including the type and condition of the heating elements, the placement and quantity of objects in the kiln, and the quality and thickness of kiln shelves. The size and shape of the kiln itself can also impact heat distribution, as well as the temperature and humidity of the environment in which the kiln is located.

5. How can I ensure even heat distribution in my electric kiln?

To ensure even heat distribution in an electric kiln, it is essential to regularly maintain and replace any damaged heating elements. Properly arranging objects in the kiln, using quality kiln shelves, and monitoring the temperature and humidity of the environment can also help to achieve even heat distribution. It is also crucial to follow firing schedules and to avoid overloading the kiln, which can lead to uneven heat distribution and potential damage to objects.

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