Riscaldamento elettrico Tests were performed in SIROCO and values are given for the following nominal operating conditions: Air inlet temperature: -20°C, Nominal air flow, Nominal heating voltage.
Aeraulic curves (air flow/pressure) have been established on SIROCO test benches. Nominal values are given at zero back-pressure (0 Pa). Ventilation test voltage is 13 Volts (12V nominal). Ventilation test voltage is 26 Volts (24V nominal).
Siroco electric heater solution is based on PTC technology.
PTC (Positive Temperature Coefficient) heating elements are ceramic resistive elements. Their electrical properties vary depending on the temperature. In the field of operation, a minimal temperature drop causes a significant drop in the resistance value, increasing current and thus electrical power. It creates a balance between the heat flow generated by the PTC element and heat dissipation into the air flow. Therefore, this balance and PTC ceramic temperature is highly dependent of air flow and ambient temperature.
