Valeo will be exhibiting its latest innovations for buses and coaches around the world at the upcoming Busworld expo in Brussels from October 18-23.
Valeo technologies are designed to maintain the cabin interior at optimal temperature regardless of the size of the vehicle (from minibuses to double-deckers), its powertrain type (internal combustion, hybrid or electric), and the nature (whether urban, peri-urban or long-haul) and duration of its journey. Valeo will be unveiling the REVO-E HP R744 heating and air conditioning system, featuring all-electric and completely environmentally neutral technology.
The new Valeo REVO-E HP R744 system is an all-electric rooftop a/c unit, equipped with a heat pump function, for hybrid and electric buses. The environmentally neutral, zero-emissions HVAC system operates with R744, a natural coolant, at outside temperatures of -20°C to 44°C. The fully automatic, energy efficient system selects the appropriate operating mode, switching from air conditioning to the heat pump or de-icing function. The de‑icing function is automatically activated when outside temperatures drop below 5°C, preventing it from icing up, which can happen with traditional heat pumps.
The environmentally neutral Valeo REVO-E HP R744 HVAC system enables the e-bus to be heated by means of a heat pump even at extremely low outside temperatures.
For the first time, Valeo developers have been working on a high-voltage heater for electric buses that features fully adjustable heat output. The Valeo Thermo HV high-voltage heater for electrobuses is infinitely variable and guarantees a constantly high heat output of 12kW.
Batteries for hybrid and electric vehicles are costly and sensitive to changes in temperature. To ensure longevity and performance, Valeo developed a battery cooler designed to maintain the battery cells at the right temperature. In addition to the field-proven 5kW version, Valeo has introduced a more powerful seven to 10kW concept solution suitable for high temperatures. At temperatures of 15°C or less, the Valeo E-Cooler BTM system uses ambient air for an energy-saving passive cooling mode. At high outside temperatures, the E‑Cooler automatically switches to an active cooling circuit.
The extremely energy-efficient E-Cooler cools the battery during the charging and discharging process and at higher ambient temperatures during the journey.
Valeo has supplemented its latest generation of SPump circulation pumps with a 120W version that is particularly suitable for smaller water circuits. It provides the high performance required for e-bus applications with a flow rate of 3,800l/h at 0.37 bar. The 120W model has 40 per cent fewer individual parts than a traditional electric water pump, making it the lightest weight and most compact system of its kind within the product family. It also features a smart diagnostic function that provides alerts to limit consumption. This is a major advantage for all hybrid, plug-in hybrid and all-electric commercial vehicles, which are dependent on efficient energy management.