What we did this week:
This week, we mainly focused on our biggest design problem and potential change to the current design; the heated table. One of the requirements we have is to get the table to 100 degrees Celsius, but we need to make sure it doesn't interfere with the other design requirements (cost, weight, etc.) We have broken it down into three major possibilities, which actually apply to the three different methods of heat transfer; conduction, convection, and radiation.
ABSTRACT:
Design 1:
Conduction: Heating Resistant Coil
Essentially running a coil through the bottom of the plate and running an electric charge through it to generate heat. This would be similar to a electric stove or an electric water heater.
Pros: Hooks into power source, (don't have to use external power source), air resistance is negligible, cheap
Cons: Involves redesigning the table
Design 2:
Convection: Heat gun ("Blow dryer")
A heat gun basically blows hot air out to heat anything. Differences in model have to do with temperature output, and air flow volume.
Pros: Can be easily placed anywhere in the design
Cons: Dependent on air resistances, doesn't heat evenly, better models are expensive, would most likely need to be plugged into an external power source (if not modified)
Design 3:
Radiation: Heat lamp
A lamp that emits heat.
Pros: Easy to implement into the design,
Cons: Would have to paint the table black so it can benefit from the table easier, can be relatively more expensive that conduction,
Calculations:
Not completed: It would be best for us to run simulations of all 3 methods, but we only had time for the radiation simulation:
Conduction:
This week, we mainly focused on our biggest design problem and potential change to the current design; the heated table. One of the requirements we have is to get the table to 100 degrees Celsius, but we need to make sure it doesn't interfere with the other design requirements (cost, weight, etc.) We have broken it down into three major possibilities, which actually apply to the three different methods of heat transfer; conduction, convection, and radiation.
ABSTRACT:
Design 1:
Conduction: Heating Resistant Coil
Essentially running a coil through the bottom of the plate and running an electric charge through it to generate heat. This would be similar to a electric stove or an electric water heater.
Pros: Hooks into power source, (don't have to use external power source), air resistance is negligible, cheap
Cons: Involves redesigning the table
Design 2:
Convection: Heat gun ("Blow dryer")
A heat gun basically blows hot air out to heat anything. Differences in model have to do with temperature output, and air flow volume.
Pros: Can be easily placed anywhere in the design
Cons: Dependent on air resistances, doesn't heat evenly, better models are expensive, would most likely need to be plugged into an external power source (if not modified)
Design 3:
Radiation: Heat lamp
A lamp that emits heat.
Pros: Easy to implement into the design,
Cons: Would have to paint the table black so it can benefit from the table easier, can be relatively more expensive that conduction,
Calculations:
Not completed: It would be best for us to run simulations of all 3 methods, but we only had time for the radiation simulation:
Conduction:
Convection:
Work in progress:
Work in progress:
Radiation:
We were able to run a simulation of the radiation problem in SolidWorks. We changed to wattage of the bulb to figure out what temperature the table would be at steady state conditions.
We were able to run a simulation of the radiation problem in SolidWorks. We changed to wattage of the bulb to figure out what temperature the table would be at steady state conditions.
link to our google docs for heat transfer design (work in progress)
https://docs.google.com/spreadsheet/ccc?key=0AqDtTMKNMOpOdGZTNmlwMDZSeXhiR3R5R3lwY3B2dVE&usp=sharing
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