Valeo Thermal Bus

REVO® -E HP R744

Strong cooling and heat pump performance at zero emission

The REVO®-E HP R744 is an all-electric, zero emission HVAC unit specially designed for buses with alternative drives. The use of natural refrigerant R744 makes it an environmentally neutral HVAC system for cooling the bus interior, and it also functions as a heat pump. It operates more efficiently under a wide range of ambient conditions (-20°C / +50°C), providing a large heating capacity with less energy consumption.

Detailed information and availability on request.

Highlights

Low life-cycle costs

Optimized piping without collector therefore no yearly pressure tank inspection necessary
Compact roof-top-unit: integrated compressor and inverter
Refrigerant R744 is cost-efficient and permanent available
Practically maintenance-free

Range of Driving

Range of Driving: -20°C to +50°C
Maximized range due to reduced system weight and high-efficiency heat pump down to -20°C (R744)
Dynamic de-icing on demand for energy saving heat pump operation at cold outside temperatures < 5°C
Flexible and efficient power output due to infinitely variable compressor and fans
Electronic expansion valves (EEV) with Valeo control units for efficient operation with optimum high pressure control (optimal COP control)

Environmentally friendly

Reduced amount of refrigerant (approx. 3,8 kg)
Environmentally friendly: GWP = 1 and ODP = 0;
No leakage control needed due to the characteristics of the natural refrigerant CO2
Fulfills requirements of German “Blauer Engel” eco-seal

Refrigerant

Natural refrigerant CO2, GWP = 1 ODP = 0
Non flamable, non toxic and easily produced

Comfort

Strong cooling and heat pump performance in one unit
Fast switching from heat-pump to A/C mode (within seconds)

Additional

R744 / CO2 compressor integrated
Plug & play
Plate heat exchanger with cold water circuit for frontbox and battery cooling
Plate heat exchanger with hot water circuit for additional heating performance and higher efficiency in heat pump mode

Technical data

	REVO®-E HP R744
Refrigerant	R744 (CO2)
Cooling capacity	38 kW* at 35°C (COP = 2,2) 19 kW* at 50°C (COP = 1,2)
Heating capacity	27 kW* at -10°C (COP = 2,1) 21 kW* at -20°C (COP = 2,1)
Chiller (cold water for frontbox or BTM) PHE (warm water for frontbox or floor heating)	6 kW*at 5°C coolant temp. 10kW at 60°C coolant temp.
Current (26 V DC)	< 80 A*
Current (600 V DC)	< 36 A
Fresh air	0 - 100%
Weight	ca. 375 kg*
Dimensions (L x W x H)	2,990 x 2,081 x 411 mm
Communication	CAN-Control