2017 New Technology Compressed Natural Gas Filling Equipment

• Model NO.: JQJ-2Z30A
• No. of Gas Hose: Two
• Applicable Car Model: CNG
• Expl.Proof Grade: Exdeibmb Iia T4 GB
• Ambient Temperature: -30ºC~+50ºC
• Measuring Unit: Kg, Nm3
• Min. Reading Value: 0.01kg,0.01nm3
• Color: Optional
• Transport Package: Wooden Case

• Certification: MID, ISO9001: 2000, CE, PEI, UL, OIML, ATEX, IFSF
• Operation Mode: Normal
• Working Medium: CNG
• Rated Pressure: 20MPa
• Flow Range: 1-30kg/Min(2-40nm3/Min)
• Max.Permissible Error: ±0.5%
• Max.Working Pressure: 25MPa
• Trademark: YENERGY
• Origin: China

2017 new technology compressed natural gas filling equipment

What Features of our New design cng dispensers for CNG station?

* Best exterior construction and good appearance

* Trustable highly precise metrology equipment

* High performance for electronic parts

* High quality explosion-proof motor with strong ability against power fluctuation

* Specially designed filtering systems with build-in re-cleanable filter

* With rich functions expansion like POS for smart card and bank card

* Flexible fuel application for gasoline, diesel, and kerosene etc.

* Works well in harsh conditions, like extremely cold, hot, humid, and sand-stormy environment

What Specifications of our New design cng dispensers for CNG station?

Technical specifications

1. Working Medium: CNG

2. Gas hose: Single Dispenser, Dual Dispenser, Qua Dispenser;

3. Fuel Dispensers: choice of up to three different fuel sources;

4. Flow Volume: (1-30)kg/min;

5. Measure Accuracy: Grade 0.5;

6. Specified Pressure: 20MPa;

7. Repeat ability: 1/2 of Measure Accuracy;

8. Explosion-Proof Grade: Exdibemb II AT3 Gb;

9. Environmental Temperature: -25°C-- +55°C;

10.Power: AC220V  (50±1)HZ;

11. Power dissipation: 180W(double hoses),360W(four-hoses);

12. Instrument air: 600-800KPa clean compressed air (air-operated valve);

13. Battery backup: at least 15minutes;

14. Reset time for gas loading volume:recent 10,000times;

15. Release Load when cutting off the valve:≤400N (under rated pressure);

16. IC Card Specification: Radio-frequency Card authenticated by SAM;

What Applications of our New design electronic cng dispensers for gas station?

1. Adopting combination pump or separate pump,smaller shape and convenient maintenance.
2. Adopting painting-side for common type and stainless steel side for luxurious type.
3. Leading-static and Hihgly-hang oil pipe(inner-diameter φ 19mm,length 4500mm).
4. Features fueling as ration,  resetting by computer and redisplaying when power cut.
5.  Big-size aluminium nozzle booter.
6. Submersible pump to be optional.
7. Flow meter features high precision and strong reliability.
8. Excellent  electromagnetic  compatibility  and  strongly anti-jamming.
9. Be capable of connectiong with central computer in gas station.
10. Conveniently combining and extending function.
11. To update IC card fuel dispenser.

Quick Details

Place of Origin: Sichuan, China (Mainland)
Brand Name: Yenergy
Model Number: JQJ-2Z30A
Working medium: CNG
Expl. Proof Grade: Exdeibmb IIA T4 GB
Rated Pressure: 20MPa
Ambient Temperature: -30ºC~+50ºC
Flow Range: 1-30kg/min(2-40Nm3/min)
Measuring Unit: Kg, Nm3
Max. Permissible Error: ±0.5%
Min. Reading Value: 0.01Kg, 0.01Nm3
Max. Working Pressure: 25MPa
Color: Optional

Packaging & Delivery

1. Modular hose hanging system2. Re-connectable breakawaysBreakaway coupling&Manual emergency shut-down valve3. Filter online cleaning functionPressure discharge and Pull-off Hydrauli4. Coriolis mass-flow meter
5. 200 to 260 bars inlet pressure
6. Temperature compensation system7. Solenoid valves
8. Standard refilling duration ≤ 3 min (for a light vehicle)
9. Electronics Data configuration by console or by remote control
10. Each hose (motherboard) can save 20, 000 transaction
11. LCD Backlight(amount, volume, pricing),
 12. Pressure switch automatically, which assures take out CNG from storage system accurately and effectively
13. Shut down solenoid valve and display reason while over pressure, lose pressure and overflow
14. Provide complete support for EPOS protocols(including IFSF)
15. Save data automatically after power cut, display data lingeringly
Company Information
Chengdu Yuneng Energy Equipment Co., Ltd.Is a company specialized in R&D, manufacturing, sales of natural gas & hydrogen equipment.Located in Chengdu Shuangliu Jiaolong industrial port, cover an area of 6, 500m2.Chengdu Yuneng has a group of high-quality specialists who professional engaged in R&D of CNG, LNG, L-CNG, LPG station complete equipment, marine LNG filling complete equipment and network information management system, we have mastered the core technology of CNG/LNG/LPG complete equipment and CNG/LNG/LPG station network information management system and possess the independent intellectual property rights.

  We have obtained ISO9001:2008 certificate of quality system and established perfect marketing network and after-sales service system, which enables us not only to provide first-class product, first-class service to customers but also provide powerful safe operation.We set up after-sales service network station in all main cities in China, and our worldwide customers are in Uzbekistan, Pakistan, Kazakhstan, Iran, Bangladesh, Vietnam and Russia etc.
  We give full play to the power of team, technical advantages and well-managed to provide better product and service to our customers, always adhere to the idea "create harmonious enterprise, manufacture high-standard energy equipment".Return the blue sky to earth, Yuneng people always ready.

We sincerely welcome you to visit and contact us!



 

The insulation breakdown accident often occurred in generator. It includes interphases short circuit, inter-turn short circuit and ground fault.

    The interphase short circuit: the generator windings ends will be greatly impacted by electric power and may make the coil end deformed under two-phase or three-phase short circuit and differential protection tripping happening.

   Inter-turn short circuit: Generator outlet blasting, if it continues a long time, the stator copper wire will be melted. When no-load run, the generator three-phase voltage will be imbalance.

   Ground fault: Generator breakdown location is in the linear portion or notch position and stator ground protection act. The insulation resistance value between stator ground and ground is zero or minimum.

   The fundamental reason of generator insulation breakdown is that the stator coil insulation is weak or there is a corona etching in notch in run time. The treatment method is to find the point of breakdown and reworked and reinforced insulation. At the same time, eliminating the corona etching in a maximum extent is important.

III. A large noise or vibration with generator

   The reasons of a large noise or vibration with generator are:

   1. Foundation bolts loose, or STG subsidence. Treatment: fastening bolts. Recalibration concentricity.

   2. Generator rotor and Steam Turbine shaft are misalignment. Treatment: calibration concentricity.

   3. Bearing wall worn or damaged under short oil. Treatment: repaired bearing or replace a new bearing with same model.

   4. There is a friction between the stator and rotor. Treatment: find the friction location and reason, and then eliminate it.

   5. Fan or other fasteners loose. Treatment: Tighten fan and fasteners.

   6. Rotor coil partial short circuit, two points grounding or wiring errors. Treatment: please inspect the insulation of slip ring and the rotor coil to the ground. Or connect to the DC power source and check the voltage drop of each coil, winding direction and wiring method. So we can identify the cause of the malfunction and eliminate them.

  7. Brush is too hard, or the pressure is too large. Treatment: adjust the pressure or replace the same type of brush.

  8. Three-phase current are severe asymmetry. Treatment: please investigate that the three-phase current imbalance is in the allowable range or not. If it is not in the allowable range, please adjust three-phase load or reduce the load.

   9. Stator winding short circuit or ground. Treatment: Find out the fault and repair it.

   10. External fault or lightning strike. Treatment: if the vibration time is too long, please stop the STG and inspect.

Typical

cases:

   This is a 15 MW generator from a Shandong customer. The vibration of generator is reached to 0.12mm in running. After inspection the generator, we found that rotor dynamic AC impedance upheaval 12% in 2400-2700 and the dynamic inter-turn short circuit is serious. It destroys the balance of the magnetic field and causes the electromagnetic force uneven of generator rotor. After removal of the rotor retaining ring and treatment the rotor inter-turns, we start the STG. The vibration is about 0.01mm.

IV. The temperature of a generator is too high.

   Generally the temperature of a generator will be in the allowable value, if the generator running normally and the current, voltage, frequency, power, excitation current and power factor are all within the allowable fluctuation range. If a generator stator, core and other parts temperature are too high, please consider the following cases:

   1. Generator overload operation and exceed the allowable time. Treatment: Please reduce the generator load to the rated load or under rated load as soon as possible.

   2. Three-phase current are serious imbalance. Treatment: please find out the reason of imbalance. If it is the voltage causing, please check if it is the generator inter-turn short circuit. If it is load causing, please adjust the load and make it balance.

   3. The ventilation cooling system of generator is poor. For example, the temperature is too high, the air duct or exhaust duct are blocked, the coil and its ends are serious fouling. Treatment: please reduce the load suitability, improve ventilation, and remove fouling.

   4. The stator winding portion short circuit or ground. Treatment: Find out the short circuit or ground point and repair them, and then eliminate short circuit or ground risks.

   5. Insulation of the stator core may be partially damaged and short circuit, so there is a vortex and overheat. Treatment: please reduce the load suitability. If the generator reduces its efficiency obviously, please repair the generator stator core.

   6. The bearing is short of lubricating oil. The oil number is wrong. The oil quality is bad. The bearing is installed with a wrong way or the bearing is damaged. Treatment: please find out the reason and then replace the oil or clean, adjust or replace bearing.

V. Generator rotor ground

   Symptom: Generator grounding one point or two points grounding light plate light.

   Fault Analysis: Generator rotor winding insulation damage, coil deformity and severe dust and greasy attached in the ends seriously are all leading to the grounding of the generator rotor windings. When the generator rotor winding grounding in one point, there is electrical current pass as the ground does not constitute an electrical circuit.

However, after one point grounded, it is easy of leading another grounding point. If any part in excitation circuit ground, it can form ground fault of two or more points ground. It is very dangerous.

After the failure, the rotor windings are short-circuited. Because of the small winding DC resistance, the excitation current will increase. So the magnetic field of generator is out of balance, and main magnetic flux reduces largely. So the STG will vibrant strongly. Meanwhile the power factor of the generator will be increased significantly and get into leading phase running (absorption of reactive power from the grid).

   The stator field becomes in the frond and the rotor field becomes in the back. It will make the stator current increases. If the watcher notice that there is no excitation varying but the excitation current and stator current suddenly increases, and the excitation voltage and AC voltage are all suddenly drop, and power factor meter indicates increasing or leading phase, it means the generator rotor grounded or inter-turn short circuited. You should shut down the STG and blow-out magnetic. Please inspect the excitation system and rotor windings, and find out the short circuit point and treat it.  

VI. Excitation upgrading and generator test

   Excitation system upgrading, brushless exciter changes into the SCR excitation and make the generator maintenance easily. And it removes the disadvantage of brushless excitation dynamic adjustment slowly. The generator test includes stator insulation resistance test, the absorption ratio test, the iron loss test, leak test, AC and DC voltage withstand test, the rotor high speed balancing and overspeed test, dynamic and static AC impedance test, the generator no-load test, short circuit test, temperature rise test, residual pressure measurement, axis voltage measurement.

Generator Care

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