According to the experts, the global diesel generator market for industrial applications will grow at a care of 4.65% during the period to 2017 - 2021. You can see that electricity plays an important role in our daily life. The modern world needs electricity to operate almost everything, ranging from transportation systems, computer databases or other fields. Perkins, as a global engine brand, is widely used in various fields as well as every country. There is no doubt that Perkins generator will be one of the prominent vendors in the diesel genset market.
Perkins engine is divided into several series that we talked about before. In this article, you will learn the specific technical data of Perkins 4012-46TAG1A engine.
Basic Technical Data | |
Number of cylinders | 12 |
Cylinder arrangement | Vee, 60° |
Cycle | 4 stroke |
Induction system | Turbocharged |
Combustion system | direct injection |
Compression ratio | 13:1 |
Bore x Stroke | 160 x 190 (mm) |
Cubic capacity | 45·842 litres |
Direction of rotation | anti-clockwise when viewed from flywheel |
Firing order | 1A, 6B, 5A, 2B, 3A, 4B, 6A, 1B, 2A, 5B, 4A, 3B |
Cylinder 1 | furthest from flywheel
|
Note: Cylinders designated ‘A’ are on the right hand side of the engine when viewed from the flywheel end. | |
Approximate weights | |||
Description | unit | Tropical | Temperate |
Engine (dry) |
Kg | 4400 | 4400 |
Electropak (wet) + fuel cooler | 6086 | 5949 | |
Electropak (wet) - fuel cooler | 6070 | 5933 | |
Overall dimensions of ElectropaK | |||
Description | unit | Tropical | Temperate |
Height |
mm | 2258 | 2255 |
Length | 3915 | 3916 | |
Width | 2198 | 1775 | |
Emissions Compliant engines
Cyclic irregularity for engine/flywheel maximum | |
4012-46TAG1A | 1:714 |
Ratings | |
Steady state speed stability at constant load | ± 0·25% |
Note: Electrical rating are based on average alternator efficiency and are for guidance only (0.8 power factor being used). | |
Operating point | |
Engine speed | 1500 rev/min |
Cooling water exit temperature | < 98 °C |
Fuel data | to conform to BS2869 class A2 or BS EN590 |
Performance: All data based on operation to ISO 3046/1, BS 5514 and DIN 6271 standard reference conditions | |
Noise: For engines operating in ambient conditions other than the standard reference conditions stated below, a suitable de-rate must be applied. De-rate tables for increased ambient temperature and/or altitude are available, please contact Perkins Applications Department. | |
Test conditions | |
Air temperature | 25 °C |
Barometric pressure | 100 kPa |
Relative humidity | 30% |
Air inlet restriction at maximum power (nominal) | 2,5 kPa |
Exhaust back pressure at maximum pressure (nominal) | 3,0 kPa |
Fuel temperature (inlet pump) | 58 °C maximum |
General installation
4012-46TAG1A - Temperate
Designation | Units | Type of operation and application | ||
Baseload power | Prime power | Standby power | ||
Gross engine power | kWm | 973 | 1212 | 1327 |
Fan and battery charging alternator power | kW | 42 | ||
Nett engine power | kWm | 931 | 1170 | 1285 |
Brake mean effective pressure (gross) | kPa | 1694 | 2110
| 2309 |
Combustion air flow at ISO conditions | m³/min | 85 | 100 | 110 |
Exhaust gas temperature (max) after turbo | °C | 470 | ||
Exhaust gas flow (max) @ atmospheric pressure | m³/min | 280 | ||
Boost pressure ratio | - | 2,6 | 2.9 | 3.2 |
Mechanical efficiency | % | 89 | 91 | 92 |
Overall thermal efficiency (nett) | % | 41.0 | 41.5 | 41 |
Friction power and pumping losses | kWm | 120 | ||
Mean piston speed | m/s | 9.5 | ||
Engine coolant flow | l/min | 1020 | ||
Typical Genset electrical output (0.8pf) | kVA | 1106 | 1389 | 1526 |
kWe | 884 | 1112 | 1221 | |
Assumed alternator efficiency | %
| 95 | ||
4012-46TAG1A - Tropical
Designation | Units | Type of operation and application | ||
Baseload power | Prime power | Standby power | ||
Gross engine power | kWm | 973 | 1212 | 1327 |
Fan and battery charging alternator power | kW | 64 | ||
Nett engine power | kWm | 909 | 1148 | 1263 |
Brake mean effective pressure (gross) | kPa | 1694 | 2110
| 2309 |
Combustion air flow at ISO conditions | m³/min | 85 | 100 | 110 |
Exhaust gas temperature (max) after turbo | °C | 470 | ||
Exhaust gas flow (max) @ atmospheric pressure | m³/min | 280 | ||
Boost pressure ratio | - | 2,60 | 2.93 | 3.20 |
Mechanical efficiency | % | 89 | 91 | 92 |
Overall thermal efficiency (nett) | % | 41.0 | 41.5 | 41.0 |
Friction power and pumping losses | kWm | 120 | ||
Mean piston speed | m/s | 9.5 | ||
Engine coolant flow | l/min | 1020 | ||
Typical Genset electrical output (0.8pf) | kVA | 1080 | 1364 | 1500 |
kWe | 864 | 1091 | 1200 | |
Assumed alternator efficiency | %
| 95 | ||
Rating definitions
Baseload power
Unlimited hours usage with an average load factor of 100% of the published baseload power rating.
Prime power
Variable load. Unlimited hours usage with an average load factor of 80% of the published Prime Power over each 24 hour period. A 10% overload is available for 1 hour in every 12 hours.
Standby power
Limited to 500 hours annual usage with an average load factor of 80% of the published Standby Power rating over each 24 hour period. Up to 300 hours of annual usage may be run continuously. No overload is permitted on Standby Power.
Energy balance
4012-46TAG1A – Temperate
Designation | Units | Baseload power | Prime power | Standby power | |
Energy | in fuel | KW | 2328 | 2962 | 3330 |
in power output (gross) | 973 | 1212 | 1327 | ||
to cooling fan | 42 | ||||
in power output (nett) | 931 | 1170 | 1285 | ||
to exhaust | 750 | 1020 | 1150 | ||
to coolant and oil | 335 | 365 | 413 | ||
to radiation | 70 | 75 | 100 | ||
to charge coolers | 200 | 290 | 340 | ||
4012-46TAG1A – Tropical: The data is almost same to Temperate. Only difference between energy to cooling fan (64) and energy in power output(baseload power – 909, prime power – 1148, standby power – 1263) .
Cooling System | ||
Recommended coolant: 50% inhibited ethylene glycol or 50% inhibited propylene glycol and 50% clean fresh water. For combined heat and power systems (CHP) and where there is no likelihood of ambient temperature below 10 °C, then clean ‘soft’ water may be used, treated with 1% by volume of Perkins inhibitor in the cooling system. The inhibitor is available from Perkins. | ||
Maximum pressure in crankcase water jacket | 170 kPa | |
Maximum top tank temperature (standby) | 98 °C | |
Maximum static pressure head on pump | 7 m | |
Total coolant capacity | ||
Electrounit (engine only) | 73 litres | |
Electropak (engine and radiator) | -temperate | 207 litres |
-tropical | 210 litres | |
Maximum permissible restriction to coolant pump flow | 20 kPa | |
Thermostat operating range | 71 - 85 °C | |
Temperature rise across the engine (standby power) with inhibited coolant | 8 °C | |
Coolant temperature shutdown switch setting | 101 °C rising | |
Coolant immersion heater capacity (2 off) | 4 kWe each | |
Radiator - Temperate | ||
Radiator face area | 2,57 m² | |
Material and number of rows: -charge air and water jacket. | copper, 4 rows | |
Fins per inch and material: -charge air and water jacket | brass, 12 rows | |
Width of matrix | 1·608 m | |
Height of matrix | 1·601 m | |
Weight of radiator | 1117 kg | |
Pressure cap setting (min) | 70 kPa | |
Radiator - Tropical | ||
Radiator face area | 3,46 m² | |
Width of matrix | 2,10 m | |
Height of matrix | 1,65 m | |
Weight of radiator | 1620 kg | |
Water jacket cooling data (Temperate and Tropical) | ||
Coolant flow | 1020 litres/min | |
Coolant exit temperature (max) | 98 °C | |
Coolant inlet temperature (min) | thermostatic control | |
Coolant inlet temperature (max) | 90 °C | |
Coolant pump | ||
Speed | 2110 rev/min | |
Method of drive | gear | |
Fan | ||
Type | axial flow | |
Diameter | -Temperate | 1530 mm |
-Tropical | 1600 mm | |
Number of blades | 12 | |
Material | Aluminium | |
Drive ratio | 0·93:1 | |
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