StarCO₂mpressors for electric buses and trains

StarCO₂mpressors HR40 and HR60: Naturally Innovative Air Conditioning Solutions

Introducing the Danfoss BOCK® CO2 StarCO₂mpressors HR40 and HR60 - a game-changer in electric bus and train air conditioning. Our innovative "star" drive design offers space-saving roof installation with the industry's lowest overall height and weight.

Experience energy-efficient and eco-friendly heat generation through a CO₂ heat pump, even in frigid -20 °C conditions, without the need for auxiliary heaters. Embrace innovation for a greener future!

Key Benefits for Manufacturers and Transport Companies:

Economically and ecologically sustainable: Secured competitive advantages through an investment that is both economically and ecologically sustainable, recognized with the Busworld Innovation Award Label in 2019.
Innovative technology: Utilizes innovative radial piston technology specifically designed for mobile CO₂ applications, ensuring efficiency and reliability.
Robust construction: Features a welded, robust steel housing with the lowest risk of leakage, guaranteeing durability and safety.
Space-saving design: Boasts the lowest overall height (219mm) and weight (81kg) in its power class, optimizing space utilization in vehicles.
Versatile performance: Offers a wide speed range to cover diverse power requirements for vehicle air conditioning, heating, and battery conditioning, enhancing versatility.
Tailored oil management: Includes specially adapted oil management tailored for vehicle applications, ensuring smooth operation.
Proven Reliability: Demonstrates proven practicality through successful series operations, instilling confidence in performance.
Robust Valve Design: Features a robust ring valve design, enhancing overall reliability and longevity.

Features and benefits of StarCO₂mpressors for electric buses and trains:

Compact efficiency: innovative "star" drive design with radial piston cylinders arranged in a star configuration around the crankshaft, offering an extremely compact compressor perfectly suited for CO₂ refrigerant (R744) and mobile applications.
Energy efficiency: eliminates the need for energy-consuming auxiliary heaters, achieving up to 20% higher efficiency with the CO₂ heat pump.
Extended vehicle range: provides approximately 40% more vehicle range, enhancing mobility and reducing operational costs.

Product features (quick overview)

Four-cylinder radial reciprocating compressor HR40 and HR60
Max. permissible overpressure: 150 bar/100 bar (HP/LP)
Weight: 81 kg
Height: approx. 219 mm, overall length: 600 mm
Wide speed range from 750 to 4,350 rpm / 12.5-75 Hz (HR60 65 Hz) for heat pump application and thermal management
Maximum permissible inclination: 22° continuous operation, 30° short term
Pipe connection with flange connection, optional solder flange
Displacement at 50 Hz / 2,900 1/min: HR40: 7.3 m³/h / HR60: 10,9 m³/h
Cooling capacity¹⁾HR40: 7 - 35 kW/ HR60: 9 - 47 kW
Heating capacity²⁾HR40: 4 - 27 kW/ HR60: 6 - 35 kW

¹⁾ +10°C/ 40°C (100 bar) / 10 K
²⁾ -20°C / +25°C (80 bar) /10 K

Radial reciprocating piston technology

Specifically developed for mobile CO₂ applications

Efficient reciprocating piston technology, especially part-load optimised for heat pump applications
Very wide speed range
Lowest overall height, lowest weight
Welded housing with reduced interfaces for lowest risk of leakage
Space-saving roof installation in electric buses and trains
Robust and reliable, proven in practice

Environmentally friendly and future-proof

Air conditioning and heating with climate-neutral refrigerant R744

Natural, non-flammable refrigerant
Climate neutral: no ozone depletion potential (ODP = 0)
The lowest global warming potential (GWP = 1)
Efficient operation of heat pumps down to an outside temperature of -20 °C
Up to 75% energy savings compared to electric heating
Meets the criteria of the "Blue Angel" Eco-label
Meets the subsidy requirements for electric bus air conditioners in Germany

BOCK® compressors with R744/CO₂ as refrigerant

Environmentally Friendly and Cost-Effective: CO₂ is a natural, eco-friendly, and economical refrigerant compared to fluorinated alternatives. It's non-toxic, non-flammable, and colorless.
Low Environmental Impact: CO₂, with a GWP value of 1, isn't subject to the F-Gas Regulation's "Phase-Down Scenario." Leak tests are only mandatory for systems with a 5-tonne CO₂ equivalent charge, saving on testing costs.
No Costly Recovery: CO₂ release during service work doesn't necessitate expensive refrigerant recovery, reducing maintenance expenses.
Expert Support: CO₂ systems can have demanding characteristics, including high pressure and low critical points.

Looking for spare parts?

BOCKSHOP Spare parts catalog

SEARCH. CLICK. FIND.

The online spare parts catalog allows you to find the right spare parts and accessories for BOCK compressors and units with just a few clicks.

Go to BOCKSHOP

Documents

Documents
Type	Name	Language	Valid for	Updated	Download	File type
Brochure	BOCK, StarCompressor	Polish	Poland	12 Aug, 2024	715.5 KB	.pdf
Brochure	BOCK, StarCompressor	English	Multiple	06 Oct, 2023	2.3 MB	.pdf

Software

Compressor selection tools - VAP

The VAP tool is ideal for finding the appropriate compressors for mobile applications. By inputting the required refrigerating capacity and operating conditions, the tool will display compatible components right away. In the VAP tools you will also find additional details about the suggested compressors.

Go to tool - VAP for Mobile applications

Related applications

Bus and train air conditioning

Danfoss provides bus & train air conditioning parts for energy-efficient systems. Visit us here - and learn more about our transport air conditioning systems.

Learning

Join the CO₂ Technology Training at our Training Center in Frickenhausen

On-site CO₂ Basic training with the tour of the training application, available in English and in German.

Gain a good awareness knowledge about CO₂ technology and register to one of our face-to-face courses. A complete transcritical supermarket cooling system, incl. heat recovery, air conditioning, parallel compression and ejector is available at our training center in Frickenhausen.