The RBR can withstand air temperatures of up to 350°C on the inlet side because of its design making it especially suitable for hot air recycling. By combining the double-flange air heaters type DF-R and other accessories, hot air systems can be constructed that recycle the hot air from the process which saves significant amounts of energy and costs.
The Comparison
Sample calculation showing the potential of energy savings due to hot air recirculation.
Based on:
- 24-hour operation
- 250 days per year
- T1=inlet= 20°C
- •or T1= 160°C
- •or T1= 350°C
- T2=target = 500°C
Example 4000 l/min
Annual energy consumption @
T1 = 20°C à 232’300 kWh
Required Power 38.7 kW
T1 = 160°C à 164’600 kWh
Required Power 27.4 kW
T1 = 350°C à 72’600 kWh
Required Power 12.1 kW
Saving per year T1 = 350°C vs. T1 = 20 °C
= 159.723 kWh
@ 0.12€/kWh à savings = 19‘152.- €
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