Environmental Engineering Reference
In-Depth Information
19.1
Advantages of biomethane. Upgrading of biogas to biomethane
and feed-in to the gas grid instead of on-site application (1). allows
biomethane to be transported and applied more efficiently (2).
Furthermore, quantities can be split, traded and transported to various
types of applications (3). Using the natural gas infrastructure enables
storage, cross-border trade and power generation on demand (4).
the production facility (see Fig. 19.1). Biomethane can be transported
through the gas grid to locations where it can be applied more efficiently
(stage. 2 in Fig. 19.1), for example in a combined heat and power (CHP)
plant operating near a heat sink without the restraint of having to be near
the production facility. The dimensions of CHP plants can now be designed
to fit the demand (i.e. the heat sink), instead of the size of the anaerobic
digestion facility. After feed-in, biomethane is open to new fields of
application and gains additional flexibility (stage. 3 in Fig. 19.1). Gas
quantities produced on one production site can be used in diverse
applications, including
￿ ￿ ￿ ￿ ￿ ￿
power generation (e.g. in a CHP) plant
.
.
heating (of buildings or in industry applications)
as motor fuel in natural gas vehicles (NGVs).
.
Even non-energy application of biomethane as a raw material for the
chemical industry substituting fossil methane is possible. The whole natural
gas infrastructure is available to biomethane after feed-in (stage 4 in Fig.
19.1). Just like natural gas, biomethane can be stored and transported, even
across borders. Demand-responsive production of power from biomethane
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