Re-envisioning a sustainable hydrogen energy economy
Re-envisioning a sustainable hydrogen energy economy
Re-envisioning a sustainable hydrogen energy economy
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Key differences between the original <strong>hydrogen</strong> <strong>economy</strong><br />
(HE) and the <strong>sustainable</strong> <strong>hydrogen</strong> <strong>economy</strong> (SHE)<br />
• SHE set firmly in the context of zero greenhouse gas emission <strong>economy</strong> in<br />
terms of both the production of <strong>hydrogen</strong> from renewables and consumption,<br />
rather than just response to depleting fossil fuels<br />
• SHE involves decentralised distributed production of <strong>hydrogen</strong> from a wide<br />
variety of renewables and feedstocks, rather than centralised production from<br />
mainly solar and wind <strong>energy</strong> (and possibly nuclear), and very long distance<br />
transmission of <strong>hydrogen</strong> via pipelines, as in HE<br />
• In SHE, <strong>hydrogen</strong> and electricity play complementary roles as <strong>energy</strong> vectors,<br />
and <strong>hydrogen</strong> and batteries complementary roles as <strong>energy</strong> stores, in the<br />
transport, industrial, commercial and residential sectors.<br />
• SHE focuses exclusively on renewables, coupled with an equally strong<br />
emphasis on <strong>energy</strong> efficiency and demand management<br />
• In ideal SHE form, no <strong>hydrogen</strong> from fossil fuels, whether steam reforming of<br />
natural gas, or integrated gasification combined cycle coal-conversion with<br />
carbon capture and storage<br />
RMIT University©2010 SAMME 16
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