Transport Air Conditioning

Transport air-conditioning refers to air-conditioning found within the cabin of cars, lorries, buses and trains. The transport sector is particularly problematic in terms of emissions due to high leakage rates.

Cool technology options include CO2 and hydrocarbons. Though at the present there are no hydrocarbon based mobile air-conditioners sold on the OEM market for passenger cars, the use of hydrocarbons is technically feasible, as demonstrated by the large number of cars that have reportedly been converted from CFCs and HFCs to hydrocarbons. Refrigerants should only be used in equipment that has been designed for their use, to ensure efficiency and safe use. HFO-1234yf is being widely adopted in passenger car air-conditioning as an alternative to HFC-134a. However, HFO-1234yf and other HFOs are not considered Cool Technologies due to concerns over their long-term environmental impact. Some German car companies are using CO2 in a number of car series, based on concerns over the safety of HFO-1234yf. CO2 is expected to become a more attractive proposition as the electric car market grows.

A/C loop R-744 - Valeo

Net-Zero Product
More Information
Sector
Air Conditioning Transport
Application
Car
Technology Type
AC Circuit
Refrigerant
Carbon Dioxide
Manufacturer
Valeo
Availability
Worldwide
Energy Efficiency
Energy efficiency measures:  Best in class Gas Cooler, higher cooling power, lower pressure drop, mechanical resistance. Best in class Evaporator, higher cooling density, improved aeraulic...

Refrigerant GWP: 1
Refrigerant safety class: A1
Awards/ merits: Automechanika Innovation Awards 2018
Company Headquarters: Germany

Website

BVG

Case Study
Sector
Air Conditioning Transport
Application
Bus
Technology Type
Refrigerant
Carbon Dioxide
Manufacturer
Konvekta
Country
Germany
Energy Efficiency

BVG is Germany’s largest local transport company. In 2010, the company installed CO2 air-conditioning in seven buses in Berlin. The A/C systems were provided by Konvekta. Most new city buses and all long-distance buses in Germany are equipped with A/C systems with an average HFC leakage of 13-14% a year, or a total of 140,000 tonnes of CO2 equivalent.

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ClimateWell

Cool Technologies Product
Sector
Air Conditioning Transport
Application
Transit Vehicles
Technology Type
Refrigerant
Water
Manufacturer
ClimateWell
Manufacturer Country
Sweden
Energy Efficiency

ClimateWell systems run using heat, water and glycol, and do not require a refrigerant. The systems are particularly well suited for transit vehicles, recreational vehicles and contruction vehicles as air-conditioning can be used while the engine is off.

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CO2 Compressor DC28 - Doowon

Net-Zero Product
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Sector
Air Conditioning Transport
Application
Car
Technology Type
Compressor
Refrigerant
Carbon Dioxide
Manufacturer
Doowon
Availability
Worldwide
Energy Efficiency
COP: tested under nominal conditions COP is higher than R-134a in all the test conditions.

Refrigerant GWP: 1
Refrigerant safety class: A1
Rated cooling capacity range: capacity: 28cc/rev – max. speed: 11,000 (9,500~Continuous) rpm
Dimensions: Height (in mm): 105, Depth (in mm): 220, Weight (in kg): 4.5kg
Company Headquarters: South Korea

Website
 

CO2 Heat Pump for electric buses (part of Citaro bus) - Daimler

Net-Zero Product
More Information
Sector
Air Conditioning Transport
Application
Bus
Technology Type
Heat Pump
Refrigerant
Carbon Dioxide
Manufacturer
Daimler
Availability
Worldwide
Energy Efficiency
Energy efficiency measures: It reduces the energy consumption of the bus by 40 percent by comparison with conventional buses.

Compressor hermetic rotary Panasonic C-CV753L0V - Panasonic

Net-Zero Product
More Information
Sector
Air Conditioning Transport
Application
Bus
Technology Type
Compressor
Refrigerant
Carbon Dioxide
Manufacturer
Panasonic
Availability
Worldwide
Energy Efficiency
High coefficient of performance (COP) while maintaining low noise and low vibration

Refrigerant GWP: 1
Refrigerant safety class: A1
Rated cooling capacity range (in kW) 13.2 kW (Speed 60rps/Suction temp: 32.2˚C/Gas cooler outlet: 32.2˚C/Tev -10ºC/Discharge 110 bar)
Dimensions Weight (in kg): 39.2kg
Company Headquarters: Spain
Energy source: Electric
Training: Full technical assistance available to customer
Awards/Merits: Nine years of field track record

Website
 

Deutsche Bahn

Case Study
Sector
Air Conditioning Transport
Application
Train
Technology Type
Refrigerant
Carbon Dioxide
Manufacturer
Faiveley / Konvekta
Country
Germany
Energy Efficiency
Energy savings on the pilot trains have been around 10% compared to the R-134a systems used previously

Deutsche Bahn, a German railway company and Europe’s largest railway operator, aims to use natural refrigerants for air conditioning in new trains by 2020. The first DB Bahn train to be fitted with CO2 air conditioning was a Siemens VT642 train, in Chemnitz (Saxony) in 2016. Since then the company has carried out a few more projects with a CO2 air-cycle system.

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ECOLINE TE compressors - Bitzer

Net-Zero Product
More Information
Sector
Air Conditioning Transport
Application
Bus
Technology Type
Compressor
Refrigerant
Carbon Dioxide
Manufacturer
Bitzer
Availability
Worldwide
Energy Efficiency
COP: tested under nominal conditions 11.38

Refrigerant GWP: 1
Refrigerant safety class: A1
Rated cooling capacity range (in kW) 6.56-112.60 depending on the model
Dimensions: weight (in kg): 94-243
Company Headquarters: Germany

Website
 

ECOLINE Transcritical - Bitzer

Cool Technologies Product
Sector
Components Compressors
Air Conditioning Transport
Application
Bus
Ship
Trailer
Train
Transcritical
Technology Type
Reciprocating Compressor
Transcritical
Refrigerant
Carbon Dioxide
Manufacturer
Bitzer
Manufacturer Country
Germany
Energy Efficiency

Semi-hermetic reciprocating compressors for transcritical CO2 applications

Website

Konvekta

Cool Technologies Product
Sector
Air Conditioning Transport
Application
Bus
Technology Type
Refrigerant
Carbon Dioxide
Manufacturer
Konvekta
Manufacturer Country
Germany
Energy Efficiency

Konvekta has had some success outside of Deutsche Bahn with CO2 MAC in buses in Germany and Austria. “The vehicles with CO2 in operation are roughly 100 vehicles,” Michael Sonnekalb of Konvekta.

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