Introduction
Oil and natural gas fields require electricity for several
reasons. Among these are cathodic protection ofthe well casings
and pipes, telemetry power, and lighting. If this power is not
supplied by a connection to the grid, then it must be supplied
from the field. The usual methods are to either provide small i.c.
engine generator set, solar panels, or self-contained
thermoelectric generator which is fueled with either propane or
natural gas from the well.
For the low-power requirements motor generator sets
are expensive to operate and maintain, so that either solar or
self-contained thermoelectric generators have been the solutions
of choice. Solar panels have their advantages and disadvantages
for these applications. However, they are not the subject of this
paper.
One of the disadvantages of the stand-alone
thermoelectric generator is that it can represent an additional
combustion source within the field, and therefore it represents
a potential safety hazard. Also since it burns potential sale gas
it represents a further energy depletion. In addition, a standalone
thermoelectric generator can be expensive.
The alternative is to tap the sources of waste heat
already available within the gas field. One widely used existing
source is the natural gas dehydrator system in which a liquid
descant such as triethylene glycol is employed to remove
moisture from natural gas.
Gas extracted from a well is composed of a gaseous
phase as well as distillate and water. Well-head gas and
processing equipment is often situated at remote, relatively
Introduction
Oil and natural gas fields require electricity for several
reasons. Among these are cathodic protection ofthe well casings
and pipes, telemetry power, and lighting. If this power is not
supplied by a connection to the grid, then it must be supplied
from the field. The usual methods are to either provide small i.c.
engine generator set, solar panels, or self-contained
thermoelectric generator which is fueled with either propane or
natural gas from the well.
For the low-power requirements motor generator sets
are expensive to operate and maintain, so that either solar or
self-contained thermoelectric generators have been the solutions
of choice. Solar panels have their advantages and disadvantages
for these applications. However, they are not the subject of this
paper.
One of the disadvantages of the stand-alone
thermoelectric generator is that it can represent an additional
combustion source within the field, and therefore it represents
a potential safety hazard. Also since it burns potential sale gas
it represents a further energy depletion. In addition, a standalone
thermoelectric generator can be expensive.
The alternative is to tap the sources of waste heat
already available within the gas field. One widely used existing
source is the natural gas dehydrator system in which a liquid
descant such as triethylene glycol is employed to remove
moisture from natural gas.
Gas extracted from a well is composed of a gaseous
phase as well as distillate and water. Well-head gas and
processing equipment is often situated at remote, relatively
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