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Difference Between Natural Gas and Diesel Based Generator.

Gas Generator

  • More Efficient.
  • Work on Piped Natural Gas supply. No storage of Fuel. However, if required storage is possible which attract additional Statutory permissions and space allocation.
  • Clean Fuel with lower emission.Higher Emission.
  • Energy in Exhaust and Jacket can be recovered resulting into generation of Chilled Water for AC/Steam from Boiler/Hot Water Generator.
  • Greater Life span (1L hours approx.).
  • Available for continuous duty application. Designed to run continuous for 1500-2000Hrs.
  • Block Loading limited to 20% of Genset Capacity.
  • Can operate on 90% of Designed Load.
  • Provides Approx. 3.9-4.2Kw/scm of Gas.
  • Higher Footprints than DG.
  • Takes 60-90 Sec to cater to full load.
  • NG Pipeline is only in 2% of Geographical Area.
  • Huge Operational Savings against DG on higher utilization.
  • Approx. 4 times expensive.
  • No restriction on running hours considering notification in NCR.
  • Made to order. Hence, lead time of 10 months in case of purchase of new Machine. Rental Solution can be provided in 1.5 Months.
  • All Gas Engines above 125Kw are imported.
  • Can be utilized till life cycle of GG.
  • PEDS can provided 700kW to 3000kW Gas generator on Rental.

Diesel Generator

  • Less Efficient.
  • Storage of Diesel for operation resulting into additional Statutory permissions and space allocation
  • Higher Emission
  • Heat Recovery is not possible/feasible
  • Designed for 40000Hours.
  • Usually used for Prime Duty Application.
  • Block loading from 35% to 45% of Genset Capacity.
  • Recommended load is 75%-80% of DG Capacity.
  • Generates 3.3-3.4Kw/Lts of Diesel.
  • Lesser Footprints.
  • Takes full Load in less than 45 sec.
  • Better Availability of Fuel.
  • Resulting Power cost is way higher than power generated by GG.
  • Less Expensive.
  • Restricted to be utilized for more than 2 hr/day even after installing Dual Fuel Kit and Emission control device.
  • Standard Ratings with lead time of 2-3 months.
  • Locally Manufactured equipment.
  • Uncertainty on usage as ban could come into effect year-round in NCR & Metro in near future.
  • Randomly available on rent in the market.

Conversion Chart

Natural Gas Conversion

1 SCM (Standard Cubic Meter)

= 1 cubic metre @ 1 atmosphere pressure and 15.56 ° C

1 Cubic Metre

= 35.31 Cubic feet

1 Cubic Metre

1 BCM (Billion Cubic Metre) / Year of gas (consumption or production)

= 2.74 MMSCMD

365 Days a Year

1 TCF (Trillion Cubic Feet) of Gas Reserve

= 3.88 MMSCMD

100% Recoverable for 20 years @ 365 days/ annum)

Gross Calorific Value (GCV)

= 10000 Kcal/ SCM

Net Calorific Value (NCV)

= 90% of GCV

1 Million BTU (MMBTU)

= 25.2 SCM

@10000 Kcal/SCM; 1 MMBTU= 252,000 Kcal)

Specific Gravity of Gas

= 0.62

Molecular Weight of Dry Air=28.964 gm/mole)

Density of Gas

= 0.76 Kg/SCM

Molecular Weight of Gas 18 gm/mol

Gas required for 1 MW of power generation

= 4128 SCM per Day

@50% efficiency of Combined Cycle Operation; at a station heat rate of 860 Kcal/Kwh~ 1720 Kcal/Kwh@50% Thermal Efficiency)

Power Generation from 1 MMSCMD

= 242 MW

@50% efficiency of Combined Cycle Operation; at a station heat rate of 860 Kcal/Kwh~ 1720 Kcal/Kwh@50% Thermal Efficiency)

Energy Consumption per MT of Urea

= 23.23 MMBTU

LNG Conversions

1 MMTPA of LNG

= 3.60 MMSCMD of Natural Gas

1 MT of LNG

= 1314 SCM of Natural Gas

1 MT of LNG

= 52.14 MMBTU

1 MT of LNG

= 2.222 M3 of LNG

LNG Equivalent of Alternative Fuels

1 MT of LNG

= 1.269MT of Furnace Oil

= 1.205 MT of Diesel

= 1.194 MT of Naphtha

= 1.113 MT of LPG

= 1.104 MT of Propane

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