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18 Sep 2015


EBERSPÁCHER SÜTRAK PRESENTS NEW HEAT PUMP WITH AIR FLOW REVERSAL The air-conditioning expert partner Eberspaecher Suetrak is presenting integral solutions for sustainable and efficient thermal management for electric and hybrid
buses at this year’s Busworld in Kortrijk. As a world debut, the company is showing its pioneering AC 230 – a roof-top air-conditioning system with innovative heat pump, which works on the air flow reversal functional principle.

Other highlights are the new, flexibly usable control unit for bus air-conditioning systems as well as the current All-Electric version of the AC 136 G4 air-conditioning system for electric buses and the AC 403 E G2 for the driver’s seat and passenger compartment air-conditioning in city buses.

The efficient, ecological and sustainable new products fulfil the requirements with respect to lightweight construction, optimum energy balance and environmental compatibility of the closed refrigerant circuits, and also offer the possibility of using new refrigerants in the future.

Simply efficient according to Eberspächer Sütrak is the new heat pump with innovative air flow reversal function. The biggest advantage of the functional principle for which a patent has been applied, is its simplicity: the new AC 230 works according to a classical refrigerant circuit with the special feature of air flow reversal. This significantly simplifies the refrigerant circuit of a heat pump, which until now was complex. Individual parts and connections could be reduced. In addition, the system

enables a seamless transition from the cooling to heating mode. Standstill

times, which are required for reverse circulation in conventional systems, are


The AC 230 is designed as a modular platform solution based on common

refrigerants, but is also designed for use of CO2 in the future. Furthermore,

Eberspächer Sütrak is offering numerous options for customer-specific

adaptation. This includes using additional plate heat exchangers for tempering

the vehicle battery as well as the installation of further heat exchangers for

efficient use of residual sources of heat. In this way, it can cover almost every

heating or cooling requirement.

The AC 230 is especially customized to the central roof-top air ducts in

electric, hybrid and trolley buses and impresses through greater efficiency and

climate comfort. For passengers, the even flow of air is extremely pleasant.

The energy balance is very favourable given the lower thermal loss at the side

windows and the optimized ventilation. Moreover, the new AC 230 can be

adapted optionally for buses with roof-top air ducts at the sides.

The new control unit from the Klimalogic family fulfils the basic requirements

as well as the considerable demands placed on high-end applications.

Eberspächer Sütrak is demonstrating it for the first time at Busworld 2015.

The modular structure ensures a high level of flexibility. Through the

consistent separation of operating device and control components, highly

individual customer requests can be accommodated. The control unit can be

combined with every CAN-compatible operating device. Furthermore,

depending on the requirement and complexity, the main CAN module can be

expanded by an adequate number to CAN sub-stations. All operating states of

the air-conditioning and heating components can be set and controlled using

the new system. The system can also be networked through the vehicle

interface with GPS data or telematic services and thereby enable diagnostic or

predictive functions within a professional fleet management system.

The display is intuitively operable. The modern design of the interface

provides maximum user convenience: to do so, the developers at

Eberspaecher Suetrak have taken account of current design trends, but also

referred back to the self-explanatory MMI sign language of automobile

passenger compartments. The dimensions are identical to the predecessor