ÖBB FLIRT Akku: Propane HVAC, Sustainable Rail in Austria

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Introduction

Liebherr-Transportation Systems has been contracted by Stadler Bussnang AG to provide propane-based HVAC systems for 16 FLIRT Akku battery-electric multiple units (BEMU) for the Austrian Federal Railways (ÖBB). The trains are scheduled to begin service in 2028.

Project Overview

The project involves the supply of HVAC systems for 16 FLIRT Akku trains. These trains are designed to replace parts of ÖBB’s diesel fleet. The three-car FLIRT Akku trains will each have a seating capacity for 160 passengers.

HVAC System Details

Liebherr will supply HVAC systems that utilize propane (R290) as a natural refrigerant. Each train will be equipped with three saloon units and two driver’s cab units. The initial deliveries are scheduled for summer 2025.

Environmental and Operational Benefits

Propane is considered an environmentally friendly alternative to conventional refrigerants, with a Global Warming Potential (GWP) of up to three. The Liebherr HVAC systems are designed to be serviceable and safe, addressing refrigerant flammability concerns. The battery-electric FLIRT Akku trains are intended to reduce reliance on diesel traction.

Stadler’s Perspective

Roland Friedrich, Global Key Account Manager for Stadler, expressed gratitude for Stadler Bussnang’s trust and highlighted the efficiency and sustainability of the propane-based HVAC systems. Friedrich also noted the company’s commitment to supporting customers and local operators in applying and servicing these systems.

Conclusion

Liebherr-Transportation Systems will provide propane-based HVAC systems for 16 FLIRT Akku trains for ÖBB. The trains are scheduled to enter service in 2028 and are designed to reduce ÖBB’s reliance on diesel traction, with deliveries of the HVAC systems starting in summer 2025.

Company Summary

Liebherr-Transportation Systems: Is the supplier of the propane-based HVAC systems for the FLIRT Akku trains.

Stadler Bussnang AG: Commissioned Liebherr-Transportation Systems to supply the HVAC systems.

Austrian Federal Railways (ÖBB): The end-user of the FLIRT Akku trains.

Technology

HVAC systems: The heating, ventilation, and air conditioning systems.

R290: Propane, used as a natural refrigerant.

FLIRT Akku: Battery-electric multiple units (BEMU) trains.

Global Warming Potential (GWP): A measure of how much a given mass of a chemical will contribute to global warming over a specific period, compared to the same mass of carbon dioxide.

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