Petajoule (PJ)

One petajoule equals 1 000 000 000 000 000 joules (10 to the power 15). One petajoule equals 31.60 million m³ of natural gas. The petajoule is a standard unit of energy, the actual heat content of natural gas is variable. For electricity: 1 petajoule equals 277.78 million kWh. There are many different coal varieties. The heat values range between 24 and 29 terajoule/million kg.
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