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<<Formula>>
Heating value [Q] = heater capacity [W] × proportion
to heater capacity (*) × 0.86 (1Kw = 860Kcal)
| Classification |
Proportion to heater capacity (*) |
Exhaust port |
| Oven |
Approx. 60%
Approx. 75% |
Closed
Opened |
| Vacuum dryer |
Approx.40% |
|
| High temperature furnace |
Approx.40% |
|
| Incubator |
Approx. 60% |
|
| Low temperature incubator |
Approx. 85% (Approx.400kcal/H) |
|
Condition: Room temperature 20°C; heater at its maximum
temperature
<< Example of calculation >>
●Heating value of DN400 (Exhaust port: open)
Heating value[Q] = 1100×0.75×0.86 = approx. 710kcal/H
1. Find the heater capacity of DN400 in the catalogue.
(Convert kW to W)
2. Apply values in the formula shown above.
Notes:
- Note that the heating value will change whether the exhaust
is made internally or not for apparatuses with larger exhaust
ports.
- For low temperature incubators almost all condensation
heat (produced from heat exchange of freezer) is produced
at the freezer. The amount of heat is approximately
400Kcal/H.
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