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Jenbacher, JGS 420 GS-N.L, 2013, Containerized Natural Gas Generator Set, 1,489 kW, 50 Hz

Jenbacher, JGS 420 GS-N.L, 2013, Containerized Natural Gas Generator Set, 1,489 kW, 50 Hz

Description

  1. Overview
    1. Containerized natural gas power plant with a Jenbacher JGS 420 GS-N.L generating set rated 1,489 kW electrical at 50 Hz / 400 V, 1,500 rpm.
    2. New container and new fittings, fitted with the fully reconditioned generating set and new Dia.Ne XT4 control panels.
    3. Generating set built in 2013. Major overhaul at 30,000 operating hours completed in December 2022 on the engine and the alternator; the overhaul record and the full parts list are available.
    4. One unit is available now. Further units can be built to order with a lead time of about 6 months.
    5. A 440 V / 60 Hz configuration is available as an option.
    6. Option to switch to the EGHE (exhaust gas heat exchanger) 200 C configuration with by-pass.
    7. Can be combined with a matching containerized Jenbacher JGS 320 unit (999 kW) as a package of about 2.5 MW.
  2. Specifications
    1. Brand: Jenbacher
    2. Model: JGS 420 GS-N.L containerized generating set
    3. Engine type: J 420 GS-B302
    4. Year of the generating set: 2013
    5. Electrical output: 1,489 kW (1,996.8 hp) at power factor 1.0
    6. Voltage and frequency: 400 V, 50 Hz, 1,500 rpm (generator output rating)
    7. Fuel: natural gas
    8. Performance class G2 to ISO 8528, CE marked
    9. Generating set mass: 14,850 kg (32,739 lb)
    10. Container: 12,192 mm (40 ft) long, 2,990 mm (118 in) wide, 2,660 mm (105 in) high
    11. Condition: reconditioned generating set in a new container
  3. Scope of Supply
    1. Container with new fittings, ventilation air inlet and air outlet.
    2. Jenbacher J 420 GS-B302 gas engine and Leroy-Somer LSA 52.2 L70 alternator with Unitrol 1010 voltage regulator, on a common base frame.
    3. Dia.Ne XT4 engine control and supervision panels.
    4. Generator circuit breaker and switchgear panels.
    5. Gas train with flow control valve.
    6. Exhaust system with absorbent silencer and stack.
    7. Roof-mounted dry coolers for the engine jacket water (high temperature) and intercooler (low temperature) circuits, with circulation pumps, expansion vessels and 3-way valves.
    8. Lube oil daily tank of 300 liters (79 US gal) with oil lines.
  4. Process Circuits
    1. Gas connection: design pressure 0.5 barg (7.3 psig), supply pressure 110 to 400 mbarg (1.6 to 5.8 psig), gas flow 376 Nm3/h.
    2. Exhaust: 8,449 kg/h (18,627 lb/h) at 373 C (703 F) through the absorbent silencer to the stack.
    3. High temperature circuit: 938 kW, 93 C (199 F) flow and 74 C (165 F) return, 47.5 m3/h (209 US gpm), ethylene glycol 37 percent.
    4. Low temperature circuit: 113 kW, 45.5 C (114 F) flow and 40 C (104 F) return, ethylene glycol 37 percent, dry cooler 113 kW.
  5. Overhaul Record (30,000 Hours, November to December 2022)
    1. New pistons, cylinder liners, connecting rods with new bearing shells, main bearings, camshaft, cylinder head spacers and timing drive bearings; cylinder heads replaced.
    2. Crankshaft measured on every crankpin and main journal and found within tolerance; crankshaft axial play 0.20 mm (0.008 in) after the overhaul.
    3. New intercooler, water pump, turbocharger by-pass, deaeration filter, expansion vessels, fittings and anti-vibration mounts; reconditioned turbocharger; gas mixer, oil/water heat exchanger and thermostatic valve overhauled.
    4. Alternator overhauled and tested in December 2022 (winding resistance, insulation, dielectric and no-load tests, result positive); alternator coupling replaced.
    5. Pressure test completed. All parts not listed as reconditioned are new.
  6. Performance at Full Load, Reference Conditions
    1. Electrical output 1,489 kW (1,996.8 hp).
    2. Mechanical output 1,529 kW (2,050.4 hp).
    3. Fuel energy input 3,572 kW.
    4. Gas quantity 376 Nm3/h (approximately 14,008 scf/h, converted with the data sheet's own factor Sm3 = Nm3 x 1.055).
    5. Electrical efficiency 41.7 percent.
    6. Specific engine consumption 2.34 kWh/kWh.
    7. Lower heating value of the gas used for the rating 9.5 kWh/Nm3.
    8. Engine lube oil consumption approximately 0.46 kg/h (1.01 lb/h).
    9. Part load 75 percent: 1,115 kW electrical, 289 Nm3/h gas, 40.5 percent electrical efficiency.
    10. Part load 50 percent: 740 kW electrical, 203 Nm3/h gas, 38.3 percent electrical efficiency.
  7. Emissions
    1. NOx less than 250 mg/Nm3 at 5 percent O2.
    2. Emission values of the containerized package: CO 300 mg/Nm3 and NOx 250 mg/Nm3, both at 5 percent O2.
  8. Engine Data
    1. Four stroke, V 70 degree cylinder arrangement, 20 cylinders.
    2. Bore 145 mm (5.71 in), stroke 185 mm (7.28 in), displacement 61.10 liters (3,729 cu in).
    3. Rated speed 1,500 rpm; mean piston speed 9.25 m/s (30.3 ft/s).
    4. ISO standard power ISO-ICFN 1,529 kW (2,050.4 hp); brake mean effective pressure 20.00 bar (290 psi); compression ratio 12.50.
    5. Reference methane number 94, minimum methane number 75.
    6. Permitted gas pressure at the gas train inlet 120 to 200 mbar (1.7 to 2.9 psi), lower gas pressure on request; permitted gas flow pressure range plus or minus 10 percent; maximum rate of gas pressure change 10 mbar/s.
    7. Engine length 3,750 mm (148 in), width 1,580 mm (62 in), height 2,033 mm (80 in); dry weight 7,200 kg (15,873 lb), 7,900 kg (17,417 lb) ready for operation.
    8. Flywheel moment of inertia 11.64 kgm2; direction of rotation seen from the flywheel end: left hand.
    9. Starter motor 13 kW (17.4 hp), 24 V.
    10. Specific lube oil consumption 0.30 g/kWh; maximum oil temperature 85 C (185 F); maximum engine cooling water temperature 95 C (203 F); oil change volume approximately 437 liters (115 US gal).
  9. Generator Data
    1. Generator manufacturer Leroy-Somer, type LSA 52.2 L70.
    2. Rated apparent power 1,970 kVA.
    3. Active power at cos phi 1.0: 1,489 kW; at cos phi 0.8: 1,472 kW.
    4. Apparent power at cos phi 0.8: 1,841 kVA; rated reactive power 1,104 kVar; rated current at cos phi 0.8: 2,657 A.
    5. Frequency 50 Hz, voltage 400 V, speed 1,500 rpm, runaway speed 2,250 rpm.
    6. Power factor range 0.8 to 0.95.
    7. Efficiency at cos phi 1.0: 97.4 percent; at cos phi 0.8: 96.3 percent.
    8. Flywheel moment of inertia 47.80 kgm2; mass 4,425 kg (9,755 lb).
    9. Construction form B3/B14; protection IP 23; insulation class H; temperature rise class F; maximum ambient temperature 40 C (104 F).
    10. Reactances (saturated): xd 2.18 p.u., xd' 0.20 p.u., xd'' 0.11 p.u.; Td'' 24 ms, Ta 45 ms, Tdo' 2.91 s.
  10. Generating Set Nameplate
    1. Type JGS 420 GS-N.L, generating set to ISO 8528, CE marked, year of manufacture 2013.
    2. Rated power 1,489 kW (continuous operating power), rated power factor 1, 50 Hz, 400 V, rated current 2,149 A.
    3. Maximum site altitude of installation 500 m (1,640 ft); maximum intake air temperature 30 C (86 F).
    4. Mass 14,850 kg (32,739 lb); performance class G2.
  11. Exhaust and Combustion Air Data
    1. Exhaust gas temperature at full load 373 C (703 F); approximately 398 C (748 F) at BMEP 15 bar and 422 C (792 F) at BMEP 10 bar.
    2. Wet exhaust gas mass flow 8,449 kg/h (18,627 lb/h); dry 7,872 kg/h (17,355 lb/h).
    3. Wet exhaust gas volume 6,669 Nm3/h; dry 5,976 Nm3/h.
    4. Maximum exhaust back pressure at the engine outlet 60 mbar (0.87 psi).
    5. Combustion air mass flow 8,192 kg/h (18,060 lb/h), air volume 6,337 Nm3/h; maximum pressure drop across the intake air filters 10 mbar.
  12. Recoverable and Dissipated Heat
    1. Total exhaust gas heat 896 kW; exhaust gas cooled to 180 C (356 F): 506 kW; cooled to 100 C (212 F): 709 kW.
    2. Intercooler total 457 kW: first stage on the engine water circuit 344 kW, second stage on the low temperature circuit 113 kW.
    3. Lube oil heat 165 kW; engine jacket cooling water heat 429 kW.
    4. Radiated surface heat of the set approximately 119 kW; engine alone 62 kW.
  13. Cooling Circuit Data
    1. Engine cooling water circuit nominal pressure PN 10 (operating pressure 6 bar / 87 psi), pressure drop 0.20 bar; safety valves 2.50 bar (36 psi).
    2. Maximum permissible engine cooling water temperature at the engine outlet 93 C (199 F); engine cooling water flow 47.5 m3/h (209 US gpm).
    3. First stage intercooler: 344 kW, maximum cooling water inlet temperature 77.3 C (171 F), water side pressure drop 0.30 bar.
    4. Second stage intercooler: 113 kW, maximum cooling water inlet temperature 40 C (104 F), cooling water flow 20.0 m3/h (88 US gpm), water side pressure drop 0.80 bar.
  14. Connections
    1. Engine cooling water inlet and outlet DN 100 / PN 10.
    2. Exhaust gas outlet DN 300 / PN 10.
    3. Combustion gas at the gas train inlet DN 125 / PN 16; at the genset DN 125 / PN 10.
    4. First stage intercooler water DN 80 / PN 10; second stage intercooler water DN 65 / PN 10.
  15. Noise Data
    1. Residual noise level of the containerized unit in free field without reflection: 65 plus or minus 3 dB(A) at 10 m (33 ft).
    2. Generating set alone: sound pressure 97 dB(A) at 1 m (3.3 ft); exhaust 115 dB(A) at 1 m; sound power 117 dB(A) (set) and 123 dB(A) (exhaust).
  16. Container Package Dimensions
    1. Container length 12,192 mm (40 ft); overall length with the access stair platform 13,777 mm (45.2 ft).
    2. Container width 2,990 mm (118 in); width across the roof platforms 4,673 mm (184 in).
    3. Container height 2,660 mm (105 in); roof-mounted equipment 1,940 mm (76 in) above the container roof; exhaust stack top 10,000 mm (32.8 ft) above grade.
    4. Generating set alone: approximately 7,100 x 1,900 x 2,200 mm (280 x 75 x 87 in).
  17. Reference Conditions
    1. Ratings to DIN-ISO 3046 and DIN 6271 at the stated reference conditions and methane number; recoverable thermal output tolerance plus or minus 8 percent.