very low pressure
atmospheric pressures
medium pressures
very high pressures
1 kg/cm
6 kg/cm
17 kg/cm2
100 kg/cm2
more heating surface
less heating surface
equal heating surface
heating surface depends on other parameters
convection
radiation
conduction
radiation and conduction
48:20:15:7:10
10:7:15:20:48
20:48:7:15:10
7:15:20:10:48