HVAC

eCO2RAIL

eCO2RAIL is the name of a family of innovative ecological HVAC air conditioning systems able to respect the environment throughout the use of CO2 carbon dioxide (R744) as a refrigerant gas, suitable for installation on rail/metropolitan rolling stock also in countries with a warm climate such as Italy, Spain, Portugal and Greece.

30% reduction of the annual energy consumption

CO2 HVAC systems are able to operate with reverse cycle (Heat pump) with efficient and effective heating performance in winter time even at low temperatures without the need to use heaters: in traditional HVAC systems, in heating modality, the in- convenience of a drastic drop in performance around zero degrees of ambient temperature requires the need to install electrical resistors (heaters) to achieve the performance required by the specifications.

F-GAS Regulation compliance

minimum possible GWP = 1

Certainty of refrigerant gas availability

for the present and the future not subject to market changes (it's not possible to guarantee the availability of traditional gases in future years )

Reduction of maintenance costs

Carbon dioxide has: cheaper cost (about 1 €/kg) than any other refrigerant gas and the certainty of maintaining the price in the future, because of its widespread use.

Competitive advantage

Being sustainable, green, environmentally conscious, nowadays is undoubtedly a competitive advantage; Green Marketing has become a new strategic lever thanks to the growing sensitivity of users/ consumers to the world of eco-sustainability.

Chiller System for Railway Passenger Cars

COM8-eCO2RAIL

COM8-eCO2RAIL is a CO2 Chiller System for Railway Passenger Cars Heat dissipation via GTA

Technical Characteristics:

Chiller Specification
  • Indipendent Circuits: 2
  • Refrigerant Gas: CO2 (R74)
  • Cooling capacity: 50 KW (total) @ 40°C external temperature
  • Up to 70 KW for special projects
  • Single Unit Max Capacity: 28 KW (up to 35 KW for special projects)
  • High Voltage (HT) Power Supply: 650V DC or 380V 3-Phase
  • Low Voltage (LPV) Power Supply: 24V DC
  • Max Power Consumption: 40 KWe
  • Operating Temperature Range: Tested from -20°C to +55°C
  • Control System: Inverters for fine-tuning of the compressors, fan, and fluid recirculation pump.
  • Capacity Modulation: Stepless regulation from 25% to 100% of maximum output
  • Dimensions (LxDxH): 2800 x 2275 x 620 mm
  • Weight: 920 Kg
  • The System can be paired with Air Handling Units (GTA) avalaible in:
GTA Specification
  • Standard configuration: 12 units x 4.2 KW each
  • Dimensions (LxDxH): 792 x 600 x 310 mm
  • Weight: 20 Kg
  • Custom configuration: Tailored according to specific project requirements

CHILLER

GTA

Monobloc System

COM1-eCO2RAIL

COM1-eCO2RAIL is a monobloc system for roof installation on Regional trains. The system is configurable in reverse heat pump mode, with direct expansion, single-stage compression.

Technical Characteristics:

  • Refrigerant Gas: CO2 (R744)
  • Machine dimensions: 1900 x 2450 x 640h mm
  • Weight: 730 Kg
  • Number of independent circuits: 2
  • Heating power: 40 kW
  • Cooling power: 36 kW
  • Minimum fresh air flow: 340 m3 / h
  • Preheating time: (from -5° to 10°C) < 20 min Pre-cooling time: (from 40° C to 29 °C) < 30 min. Power supply: 400 Vac/ 50 Hz
  • Extreme exterior conditions: -25° +45 °C
System Split Chiller

CAB1-eCO2RAIL

CAB1-eCO2RAIL is a split-type chiller system for application in driver’s cab. The Split configuration of the system allows to install the chiller unit outside the cabin and the GTA inside the cabin under the bench. Thanks to the small size of the chilled water supply system, this system is particularly suitable for cabins with little available space.

External Unit:

Impianto frigorifero a chiller

  • Refrigerant Gas: CO2 (R744)
  • Dimensions: 755 x 550 x 600h mm
  • Position: external on the top of the train
  • 2 independent cooling circuits: 4 kW max Total
  • cooling power: 8 kW
  • 2 Fans capacity: 2.000 m3/h - 100 Pa
  • 2 flow pumps: 1,300 lt/h Total flow rate 2,600 lt/h
  • Overall dimensions: 1.505 x 1.066 x 389h mm
  • Weight: 300 kg
  • Feeding: 450Vac 60 Hz
  • Extreme exterior conditions: -25° +45 °

Internal Unit:

  • Air treatment unit connected to the current cabin air distribution system
  • Position:inside the current HVAC cabin compart- ment
  • 1 H2O/air exchanger: double redundant circuit 1 high head fan with air flow rate 1,000 m3/h
  • Weight: 100 kg
  • Power supply: 450vac 60 Hz

CHILLER WATER SUPPLY SYSTEM

there are connected pipes of the two units, which have small dimensions compatible with the available spaces

monobloc system

COM2-eCO2RAIL

COM2-eCO2RAIL is a monobloc system for roof installation on metros. The system is configurable in reverse heat pump mode.

Technical Characteristics:

  • Refrigerant Gas: CO2 (R744)
  • Machine dimensions: 2400 x 416 x 3700h mm
  • Weight: 950 Kg
  • Number of independent circuits: 2
  • Heating power: 40 kW
  • Cooling power: 50 kW
  • Minimum air flow: 5500 m3 / h
  • Minimum fresh air flow: 1680 m3 / h Preheating
  • time: (from -5° to 10°C) < 20 min Pre-cooling
  • time: (from 40° C to 29 °C) < 30 min.Extreme
  • exterior conditions: -25° +45 °C
Split Chiller System

CAB2-eCO2RAIL

CAB2-eCO2RAIL is a monobloc system roof installation on metros.

The system is configured in reverse heat pump mode.

Technical Characteristics

  • Machine dimensions: 1.440 x 1000 x 420h mm
  • Weight 120 Kg
  • Number of independent circuits 1
  • Heating power 4.2 kW
  • Cooling power 4.8 kW
  • Minimum air flow 900 m3 / h
  • Minimum fresh air flow 60 m3 / h
  • Preheating time (from 0 to 18°C) < 20 min Pre
  • cooling time (from 40° C to 29 °C) < 30 min.
  • Refrigerant Gas: CO2  (R744)
Ecological HVAC system for driver cabin.

CAB3-eCO2RAIL

CAB3-eCO2RAIL is a “Chiller” system with n.1 cooling unit installed under wall and air handling units (GTA) installed in cabin under the driver desk.

Technical Characteristics

  • Refrigerant gas Refrigerante:  CO2 (R744).
  • Dimensions: 1.440 x 1000 x 420h mm
  • Weight: 120 Kg
  • Number of independent circuits: 2
  • Heating Power: = 6 kW
  • Cooling power: 4+4 = 8 kW at 40°c (cop = 2.1)
  • Max air flow: 900 m3 / h
  • Min fresh air flow: 60 m3 / h
  • Pre-heating time (from 0 to 20 °C) < 30 min
  • Pre-cooling time (from 40 °C to 29 °C) < 30 min.
Ecological HVAC system for rolling stock.

COM4-eCO2RAIL

COM4-eCO2RAIL is an ecological HVAC System for Rolling Stock. Water Treatment Units are installed under car. Each Unit provides 18 KW of Heating Power and 20 KW of Cooling Power. Units can be coupled i9n order to double Heating and Cooling Power. Each Unit is able to feed with hot/cool water a high number of exchangers (number depends on sizes of exchangers) for different areas (passenger compartments, driver’s cab, sleeping coach compartments, etc.)

Technical Characteristics

  • Refrigerant gas Refrigerante:  CO2 (R744).
  • Dimensions (LxWxH): 2000 x 800 x 600 mm
  • Weight: 4000 Kg
  • Intermediate Fluid: H2O + Glycol
  • Heating Power:  18 kW @ -10°C (COP=3)
  • Cooling power:  20 KW @ +40°C (COP=1.7)
  • Water Flow Rate: 45 lt/min
  • High Voltage Power Supply Range: 300 - 820 VDC
  • Low Voltage Power Supply Range: 16 - 32 VDC
  • Absorbed Power: 15 KW
Battery Thermal Management Systems (BTMS) Refrigeration Unit

BTMS-eCO2RAIL

Battery Thermal Management Systems (BTMS) are refrigeration units designed to manage the temperature of a heat transfer fluid (generally glycol water with variable concentration).

They offer a high degreee of precision (+/- 1°C compared to the set point) and the capability of regulation from 30% to 100% of the nominal cooling power of the refrigeration unit.

The systems produced by CPA Elettronica for the railway sector, as well as for the road transport sector, are modular and available in the following cooling capacity sizes:

  • 5 KW @ water between 15°C and 25°C; Outdoor ambient temnperature 40°C
  • 11 KW @ water between 15°C and 25°C; Outdoor ambient temnperature 40°C
  • 20 KW @ water between 15°C and 25°C; Outdoor ambient temnperature 40°C

The system is capable of both heating and cooling the water within the battery thermal management circuit with outdoor temperature ranging from -20°C to +50°C.

It is possible to choose from different working logics for the BTMS:

  • Direct Exchange with the External Environmental: in this case, heat exchange with the external environment occurs using an air/gas exchanger, and the system interacts directly with the external environment.
  • Indirect Exchange with the External Environmental: in this solution, the BTMS is equipped with two water exchangers. This system is more compact than the previous one, allowing for easier integration of the BTMS onto the rolling stock. The water/air exchanger, wich can optionally be supplied as an accessory by CPA, can be placed anywhere in the carriage, facilitating the system’s adaptability to various available spaces.

Production is possible with botth CO2 (R744) or R513A. Upon request, BTMS systems can be integrated with HVAC systems into a single refrigeration module capable of managing both thermal loads.

 

Technical Characteristics