Air conditioning and heating system for the Škoda 29T and 30T trams for Bratislava

The air conditioning and heating system for the Škoda 29T and 30T trams is designed for cooling, ventilation, heating and conditioning the air supplied to the passenger compartment and for the driver's cabin in the tram. This project reflects the experience from the production and operation of the first generation of Poll air conditioning systems on 28T trams. This, among other things, made it possible to increase the heating and cooling capacity while maintaining the same weight.

The system consists of three main devices:

• passenger compartment air conditioning units of the KLMT29S type
• driver’s cabin air conditioning units of the KLMT29K type
• heating units of the KVA-03 type in four versions

The interior heating units have been upgraded to a higher level, as each unit contains a contactless switch and its own control unit with a CAN line, which enables improved control of thermal comfort in the vehicle. 

The passenger compartment and driver’s cabin air conditioning units are equipped with integrated compact power converters with galvanic isolation and inverters. Therefore, they can be powered directly from the 600 V or 750 V DC traction network. The cooling of the converters is active, using the air flowing through the air conditioning unit. This solution makes it possible to minimize dimensions, save space on the roof of the vehicle, and achieve better weight distribution.

Characteristics

• Control via vehicle Ethernet
• Compatible with TST (Tuning and Service Tool)
• Integrated frequency converters
• Internal CAN line for the heating units
• Continuous speed control of fans and compressor
• Contactless heating system control
• Power supply from overhead line
• Advanced diagnostics, event logger and operational data recorder

Technical parameters of the KLMT29S unit

Technical parameters of the KLMT29K unit

Fotogalerie