Reasons & factors for diesel engines

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What Are The Advantages Of Buying A Diesel
Generator Instead Of Gas Generator?
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• One of the toughest decisions when looking for
  diesel generator is to consider diesel generator
  rental or buy a new one. Once you are done with
  that another challenge is deciding what type of
  fuel you will be using on the generator. Dont
  worry, we will give you the advantages and
  disadvantages of gaseous (including natural gas
  or propane) and also on diesel to help you make a
  decision which one would work best for your
  application.

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Positive Reasons To Use Gaseous Powered Engines

• Quieter engine noise level
• More convenient fuel source (natural gas)
• More emission compliant

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Negative Reasons To Use LP and NG Factors To
Consider

• More expensive to operate can be as much as 3
  times the fuel consumption compare to a diesel
  engine.
• More expensive to purchase for models larger than
  30kw
• Shorter life expectancy - For air-cooled models
  ten to one and water-cooled models three to one
  compared to diesel powered gensets. A gas engine
  can have life expectancy as low as 500 hours
  depending on engine make and use.
• Hurricanes and earthquakes can disrupt the flow
  of natural gas lines with up rutted trees and can
  be very dangerous if lines are broken.
• Natural gas begins to derate at 20 degrees above
  zero and propane begins to derate around -20
  degrees above zero.

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Positive Factors For Diesel Engines

• Life expectancy for liquid cooled 1800 rpm
  engines can be 20,000 hours if properly serviced
  compared to 5-6000 hours on industrial quality
  gaseous gensets. Even 3600 rpm diesel engines
  normally have a 10,000-to-15,000-hour life
  expectancy.
• Diesel engines are less expensive to operate.
  Diesel generators are designed for off-road
  applications and can operate on dyed or
  construction diesel fuel which is sold without
  the road tax and is considerably cheaper to
  purchase.
• Diesel engines can operate in arctic-cold
  conditions with fuel additive.
• Diesel fuel is safer because of the high flash
  point it is difficult to start a fire with diesel
  fuel.
• Diesel engines perform better when worked under a
  load for a long period of time.
• Diesel fuel is easier to obtain during a disaster
  because it is necessary fuel for the military,
  trucking industry, and farming operations.
• The diesel generator set cost of owning is much
  lower over the long run than gaseous gensets.

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Negative Factors For Diesel Engines

• Engine noise is higher. The use of designed
  enclosure and sound attenuation system is more
  important on a diesel generator set.
• In some states, diesel engines are not allowed to
  operate over a number of hours per year because
  of the emission of diesel fuel does cause air
  pollution.
• Requires more maintenance than a gaseous unit and
  requires clean moisture free fuel.
• A diesel engine is subject easier to "wet
  stacking" if run for long periods of time with
  ultra-light loads than gaseous gensets.
• If you live where hurricane can develop you might
  need a large fuel tank due to the possibility of
  extended power outages. Some counties require the
  generator on-board fuel tanks to be double-wall
  containment type which does increase the cost of
  the genset.
• Diesel generator set are heavier than their
  counterpart gaseous genset and can cost
  considerably more than an inexpensive air-cooled
  gas generator set.

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• We hope this gives you the necessary information
  to see the positive and negative of each type of
  genset.

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