1.
so it is a 14kg SS chamber with a volume of 20"D * 20"H
for temp rise ΔT['C] , mass, m [kg], and specific heat , c [ joule/kilogram °C]
Q=ΔTmc [°C*kg*(J/[kg°C])=[J] = heat energy, Q
Temp Rise: 100'F+/-10 = 38'C +/-5 with ambient assumed temp=20'C+/-5 therefore simple approximate Temp Rise =ΔT = 18'C +/-10'C
Metric dimensions: 500 mmD * 500 mmH with a volume of
V(cyl)=pi(D/2)² * H
Volume: V= 0.1 m³ , thus if contents are full , what is the specific heat? how much energy is needed in say 20 minutes to raise from 20'C for 0.1 m³ of material and 14kg of SS oven.
Mass: from volume and density in 0.1 m³ chamber.
Density: kg/m³
Water 1000
SS 8000
Air ~ .0001
Concrete, Gravel 2400
Crushed Stone 1600
Earth, loam dry 1440
Earth, packed 1520
- Is this like a 10kg metal vacuum chamber or 1kg glass bell jar? or like a Tenney Oven? 14 stainless
- Does it have any thermal insulation? yes
- How stable does it have to be at 100'F and for how long ? +/- 10f, ~30 minutes
- Does it matter if one side is hotter than the other? don't think so
- What shape is it? round cylinder
- Can it be heated from the bottom sides top with radiant heat or inside out is preferred? inside bottom
- What time constant do you need? For tall cabinets, I have designed laminar flow 40'C burn-in chambers with 1'C gradient top to bottom with unit dissipating power and external heater. to be honest, not really sure what that means.
ok 14kg of SS
So what is mass and specific heat of ALL contents to be heated to 38'C.? including moisture content e.g. gravel , sand water and % void
What is min. ambient T?
The intent is to define if 1kW is sufficient or even feasible, What is insulation resistance 'C/W?
Also does heater remain inside , in tact, can it be protected? Assuming electrical feedthrus via vacuum seal...