Page 2
This installation manual will guide you to the factors to be considered in the installation of your diesel generator system. It discusses location and mounting of the generating set; size of room; ventilation and air flow; engine cooling water supply or radiator location; exhaust outlet; fuel tank and fuel transfer system.
1. INSTALLATION FACTORS Once the size of the generating set and the required associated control panel and switchgear have been established, plans for installation can be prepared. Proper attention to mechanical and electrical engineering details will assure a satisfactory power system installation.
4. GENERATING SET MOUNTING The generating set will be shipped assembled on a rigid base that precisely aligns the alternator and engine and needs merely to be set in place (on vibration isolation pads for larger sets) and levelled. See figure 4.1 4.1 Vibration Isolation...
See figure 5.1. The generating set should be located so that the engine intake draws air from the cooler part of the room. If there are two or more...
Page 7
5.2 Ventilators To bring in fresh air, there should be an inlet ventilator opening to the outside or at least an opening to another part of the building through which the required amount of air can enter. In smaller rooms, ducting may be used to bring air to the room or directly to the engine's air intake.
Page 8
In standard room installations, the radiated heat is already taken into account in the radiator air flow.
For a generating set enclosed in a penthouse on the roof or in a separate outdoor enclosure or trailer, the exhaust and radiator discharges can flow together above the enclosure without a stack.
Page 10
Generating Set on its vibration isolators in response to load changes. The flexible connector should be specified with the Generating Set.
Page 11
Measure the exhaust pipe length from your installation layout. See figure 6.4. Take exhaust flow data and back pressure limits from the generating set engine specification sheet. Allowing for restrictions of the exhaust silencer and any elbows in the pipe, calculate the minimum pipe...
7. EXHAUST SILENCING Excessive noise is objectionable in most locations. Since a large part of the generating set noise is produced in the engine's pulsating exhaust, this noise can be reduced to an acceptable level by using an exhaust silencer. The required degree of silencing depends on the location and may be regulated by law.
If the remaining noise level is still too high, acoustic treatment of either the room or the generating set is necessary. Sound barriers can be erected around the generating set, or the walls of the generator...
Page 14
A length of flexible duct material (rubber or suitable fabric) between the radiator and the fixed discharge duct is required to isolate vibration and provide freedom of motion between the generating set and the fixed duct.
The fan may be driven by a thermostatically controlled motor, which will only draw power from the generating set when required to cool the engine. A remote radiator can be located outdoors where there is less air flow...
Normally it is safe to store diesel fuel in the same room with the generating set because there is less danger of fire or fumes with diesel than with petrol (gasoline). Thus, if building codes and fire regulations permit, the day tank should be located in the base of the generating set, along side the set, or in an adjacent room.
Page 17
10.2 Remote Fuel Systems Three types of remote fuel systems are recommended by the manufacturer: Fuel System 1: Installations where the bulk fuel tank is lower than the day tank. Fuel System 2: Installations where the bulk fuel tank is higher than the day tank. Fuel System 4: Installations where fuel must be pumped from a free standing bulk fuel tank to the day tank.
With this system, the basetank must include an overflow via the return line, sealed fuel level gauges and no manual fill facility. All other connections on top of the tank must be sealed to prevent leakage. Fuel System 2 is not compatible with the polyethylene fuel tanks standard on smaller generator sets.
Page 19
Flexible piping should be used to connect to the engine to avoid damage or leaks caused by engine vibration. The fuel delivery line should pick up fuel from a point no lower than 50 mm (2”) from the bottom of tank at the high end, away from the drain plug.
Page 20
Thus, location, application and environmental conditions should be considered when selecting fuel. The Generating Set owner may elect to use a low grade fuel because high-grade fuels are not readily available in his area or because he can realise a net saving with low grade fuels despite higher engine maintenance costs.
Other solutions are to add inhibitors to the fuel or to obtain greater turnover by using the fuel for other purposes. A gum inhibitor added to diesel fuel will keep it in good condition up to two years. If the building furnace has an oil burner, it is possible to burn diesel fuel in the furnace, connecting both the engine and the furnace to the same tank.
TABLES AND FORMULAS FOR ENGINEERING STANDBY GENERATING SETS Unit Microns 1 Micron 1 Meter 1,000,000 1 Kilometre 1 Inch 25,400 1 Foot 1 Yard 1 Mile One unit in the left-hand column equals the value of units under the top heading. Unit 1 In 0.006944...
Table 4. Volume and Capacity Equivalents Unit Inches Feet 1 Inch 0.000579 1 Ft. 1728 1 Yd. 46656 61023 35.31 0.1337 U.S.Liq.Gal 1 Imp. Gal. 277.42 0.16 1 Litre 61.02 0.03531 One unit in the left-hand column equals the value of units under the top heading. Table 5.
Table 7. Conversions for Measurements of Water Unit Feet Pounds (U.S Feet 62.42 Pounds 0.01602 0.12 8.34 (U.S) 10.0 (IMP) Litres 2.2046 Head (Ft) lb/in² Ton/Ft² Head (Meters) Ft³/Min Gal. (U.S)/Hr One unit in the left-hand column equals the value of units under the top heading. Table 8.
Table 9. Conversions of Units of Flow Unit Gallons/Minute 1 U.S Gallon/Minute 1 Million U.S 694.4 Gallons/Day 1 Foot /Second 448.86 1 Meter /Hour 4.403 1 Litre/Second 15.85 One unit in the left-hand column equals the value of units under the top heading. Table 10.
Kilovolt-Amperes I x V 1000 I x V x Eff . x PF Electric Motor Horsepower Output (HP) HP x 746 Amperes (I) When Horsepower V x Eff . x PF is known kW x 1000 Amperes (I) When Kilowatts...
The formula also implies greater reliability when the same engine produces the same power at a higher speed. Other things being equal, it is unlikely that a 60 Hz generating set operating at 1800 RPM is more reliable than a comparable 50 Hz generating set operating at 1500 RPM. Also it is doubtful that a generator operating at 3000 RPM will be more reliable than one operating at 1500 RPM even if the latter engine has a significantly higher BMEP.
Page 30
A direct current is usually constant in magnitude for a given load. EFFICIENCY - The efficiency of a generating set shall be defined as the ratio of its useful power output to its total power input expressed as a percentage.
Page 31
RATED SPEED - Revolutions per minute at which the set is designed to operate. RATED VOLTAGE - The rated voltage of an engine generating set is the voltage at which it is designed to operate.
Page 32
TELEPHONE INFLUENCE FACTOR (TIF) - The telephone influence factor of a synchronous generator is a measure of the possible effect of harmonics in the generator voltage wave on telephone circuits. TIF is measured at the generator terminals on open circuit at rated voltage and frequency. THREE PHASE - Three complete voltage/current sine waves, each of 360 electrical degrees in length, occurring 120 degrees apart.
Page 33
GROUP HEADQUARTERS Old Glenarm Road Larne, Co. Antrim BT40 1EJ Northern Ireland, United Kingdom Telephone: (44) 028 2826 1000 Fax: (44) 028 2826 1111 276-851 INSTALL.DOC/0601...