What other design considerations should be made?

In addition to the rating of the generator, a number of other items should be considered when selecting generators. These include:

  • Grid code connection requirements.
  • Environmental Conditions;
    • High ambient temperature will determine the cooling requirements,
    • Higher altitudes will reduce the generators rated output.
    • Low ambient temperature will determine any measures needed to keep the fuel from freezing.
  • Planning; Local planning and building regulations should be checked and adhered to.
  • Safety;
    • Diesel is a flammable material, and so care should be made to avoid creating a fire hazard.
    • General regulations relating to hazardous substances, rotating machinery and electrical equipment.
  • Civil Engineering; Generators should be sited in areas with good access for general maintenance, and installed on level solid ground. Bunds will be required to contain oil or fuel leakage.
  • Noise; It is normal to specify acoustic enclosures that reduce the noise output. Even so, noise should still be taken into account when deciding on generator siting.
  • Ventilation; Generators require cross flow of air for cooling, and so such should be placed in areas with good ventilation. Particular care is needed if an internal installation is considered, in particular the positioning of the flue to remove harmful combustion gases.
  • Security of Supply; Diesel generators are very reliable, however provision of additional units can allow a level of redundancy to cover generator fail to start or maintenance outages. If any break in power is unacceptable, then a battery powered Uninterruptable Power System (UPS) will be needed to cover the period between loss of mains and diesel start up.
  • Bulk storage tank location; The location of the bulk tank and the arrangements for transferring the diesel to the day tank need to be considered.  Transfer can either be by gravity feed or pump.
  • Fault status indicators. These provide early warning signals and alarms in the event of generator malfunction or fuel running low.
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