CNG Refuelling station

A company located in Cherasco (Italy), is among the world leaders in the field of designing and manufacturing of components and equipment for CNG and LPG automotive engine conversion.

After a first growth phase mainly connected to the manufacturing of LPG multivalves, M.T.M. – BRC Gas Equipment has started in the 80s the production of a complete range of LPG and CNG components; in 1991 was made the first system for carburetion close loop control and, in 1996 the very first Italian LPG/CNG MPI injection system. The staff increased progressively up to the present 500 employees working in 4 different factories, under a 40.000 m2 covered area.

In the 2005, M.T.M. – BRC Gas Equipment has finalized a two years merging process with the American Impco, world leader for the industrial applications of the gaseous fuels, thus creating the world biggest manufacturing concentration in the field of the alternative fuels.

M.T.M. S.r.l. – BRC Gas Equipment

CNG Refuelling station

The standard layout consists of a three stages reciprocating W compressor and an hydraulic high pressure unit of compression (BOOSTER)

CNG refuelling station

The compression system is inside a 20” container that is divided in to 3 separate rooms:

1° room in which there aren’t pipes containing gas, and that contains the electrical panel (with plc), hydraulic power station (for box handling), and pneumatic panel with air compressor.

CNG refuelling station

2° room containing compressor, booster, lubrication and cooling equipment

3° room containing storage tanks

CNG refuelling station

The compression station consists of the following main parts:

Connection to the feeding net with filter and safety valves (outside the compressor room)

Three stages reciprocating compressor with crankshaft, connecting rods, single effect

Medium pressure vessels for damping and storage

Booster compressor (driven by hydraulic cylinder)

High pressure vessels for damping and storage

Control panel to reduce the pressure from the high pressure storage to the dispenser

Safety valves with pneumatic actuator and filter/condensate drainage system between storage cylinders and dispenser

Dispenser

Cooling system.

CNG Refuelling station

System management

All control parameters can be set through PLC. Using the pressure transducers and a specific software, it is possible to guarantee an efficient scheduled maintenance. It’s also available an optional modem for the remote control of the station.

BRC Compressors

BRC Compressors are specifically developed for CNG applications to obtain the maximum safety, efficiency, reliability and easy maintenance. The BRC compression systems completely designed and industrialized within our Technical departments, by the use of the most advanced instruments for safe dimensioning and design.

W Compressors

The shape of BRC compressor allows a good inertial balancing, keeping small external dimensions, an easy disassembling of the components and an excellent reliability of the whole system.

W Compressors

Innovative technical solutions

A particular care has been used for the filtering of vapor and other impurities which can be present in the pipeline network gas. Further the oil leakage in the compressed gas has been reduced to a minimum, using specific oil wiping rings and multiple “dry” sealing systems. To enable the compressor work without lubrication, sealing and driving elements made by P.T.F.E. have been used, reinforced by other synthetic materials according to the most updated technology.

W Compressors

Cooling and lubrication systems

The compressors are completely cooled by a specific forced fluid flowing inside a closed circuit while the compressed gas is cooled at each stage outlet to enhance the efficiency of the machine and increase the durability of the sealing elements.

The pressurized lubrication system is automatically managed by a PLC and it is independently driven by a separated electrical engine so that a proper lubrication is ensured in any working conditions.

W Compressors

Lower vibration and noise levels

The slow rotation speeds let us to warranty a longer durability for the components and lower vibrations and noise. Even the preferred choice to connect the electrical engine and the compressor module through a flexible joint is guaranteeing better efficiency, lower noise level, lower maintenance requirements and smaller dimensions.

W Compressors

W is a reciprocating compressor with crankshaft-connecting rod-crosshead-piston rod-piston kinematic motion; it consists of three single effect cylinders, one for each compression stage. Gas suction and discharge are obtained by a concentric valve with rings and plastic seals.

A

A

SEZIONE A-A

CARTERFLYWHEEL-JOINT

CRANKSHAFT

FLANGE BRING BEARING

SPLINER

W Compressors

BRC Compressor Performances

0

100

200

300

400

500

600

700

800

900

1000

2 3 4 5 6 7 8

Intake pressure [barg]

Cap

aci

ty [

Sm

3/h

]

132 kW 90 kW

W Compressors

BRC Compressor Performances

0

20

40

60

80

100

120

140

160

2 3 4 5 6 7 8

Intake Pressure [barg]

Po

wer

[kW

]

132 kW 90 kW

BRC Compressors

The above characteristics are just an indication.

The capacity and power characteristics could change according CNG composition, ambient conditions and P&I configuration.

The BRC compression stations can be personalized to make them suitable for the different customers’ needs. The basic three stages, single effect configuration can be modified according to the requested flows and inlet and outlet pressures.

BOOSTER Compressors

BOOSTER is a reciprocating compressor driven by a hydraulic double effect, cylinder. It’s, in fact, a fourth compression stage that allows to fill the high pressure storage tanks.

Typical P&I diagram compression station

Typical P&I diagram compressor

VENT

T

T

P

water + glicolep max = 3 bar

water + glicolep max = 3 bar

water + glicolep max = 3 bar

12

6

7

8

910

11

1218

19

1314

15

16

18

1°2° 3°

2"x3.6

35x335x335x3

35x3

28x3

28x3

12x2

12x2

28x3

28x3 28x3

20x3

12x2

28x3

20x3

28x3

storage tanks M.P.

vent

6 bar19 bar

19 bar

19 bar

62 bar

62 bar

62 bar

200 bar

200 bar200 bar

T

345

flanged connection DN 50

NOTE : inlet /outlet water liner (cylinders cooling ) 1" GAS

6x1

18