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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

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      CommentAuthorfostertom
    • CommentTimeJun 17th 2018
     
    This seems a confused 'hack' article - don't they have any scientists to write such journalism?
    https://www.theguardian.com/business/2018/jun/17/siemens-pilots-the-use-of-ammonia-for-green-energy-storage

    http://www.siemens.co.uk/pool/insights/siemens-green-ammonia.pdf
    is only slightly more informative.

    Leave aside that nitrogen use as fertiliser (growing 3% pa) is more part of the problem than solution.
    Far from being an energy storage solution, the idea seems to be to soak up vast amounts of the available renewable energy to manufacture NH3 by electrolysis, instead of by burning natural gas - so less CO2 production, but no different from any other renewables vs fossil substitution.

    Then the marginal sweetener that if even more NH3 was electrolised, it could be stored and burnt when the wind drops, or indeed as vehicle fuel.

    Can anyone throw light on the whole chemical and energy cycle, as is and as proposed?
    • CommentAuthortony
    • CommentTimeJun 17th 2018
     
    Until we cease burning fossil fuels it would be a lot better not to go down the ammonia route
    •  
      CommentAuthorfostertom
    • CommentTimeJun 18th 2018
     
    When ammonia NH3 is burnt, what's the product? - H2O and nitrous oxides (nasty)?

    "When used [burnt] in this way ammonia turns back into air [?] and water, so doesn’t pollute the atmosphere."
    But
    "Ammonia can even be made to clean up after itself by ‘scrubbing’ any nitrogen oxides left after combustion." So perfect-functioning scrubbing apparatus is part of the deal? Where are the 'scrubbed' chemicals disposed to?

    And what's the energy density (W/kg, or W/m3 liquefied) of NH3 vs H2 vs methane CH4?
    • CommentAuthorretrofrit
    • CommentTimeJun 18th 2018
     
    Try subscribing to this lot - http://www.ammoniaenergy.org/ , there's loads of interest and activity in ammonia, less so here institutionally or by large cos. Efficient synthesis and then cracking back to hydrogen & nitrogen has been problematic on a practical real world level but they're getting there.

    Rather than thinking of ammonia as a petrol replacement think of it as a portable energy store, "green ammonia" can be made in remote resource poor countries who have renewable energy, can be shipped or used as bunker fuel, can be used to power hydrogen fuel cells rather than liquid hydrogen which must be dodgy.
    • CommentAuthorowlman
    • CommentTimeJun 19th 2018 edited
     
    I thought atmospheric ammonia is something of considerable concern for the EU. Should we really, potentially, be adding to it?

    ttps://ec.europa.eu/environment/efe/themes/air/agricultural-sector-must-reduce-emissions-and-help-fight-air-pollution_en
    • CommentAuthorretrofrit
    • CommentTimeJun 19th 2018
     
    Its an energy resource to be used , stored, or converted not wasted or vented I think this article is to do with farming emissions.
    • CommentAuthorowlman
    • CommentTimeJun 20th 2018
     
    Sure it's about farming emissions James, but ammonia is ammonia, and it is of heath concern. Ammonia emissions and their role in PM2.5 formation may be a problem AFAIK.
    • CommentAuthorretrofrit
    • CommentTimeJun 20th 2018
     
    Sorry didn't mean to dismiss health concerns,and tbh I wasn't aware of the impact of ammonia emissions on particulates, I realise its not nice stuff and assume that all handling equipment will have minimal leakage, at least its smelly and at relatively low pressure so it shouldn't be too difficult.

    My car is lpg and I'm always surprised by the amount released when disconnecting, was also wondering about petrol as I remember years ago talk of fume extraction when refilling, had a look and apparently regs are on the books, discussion started in 2004 and large petrol stations have to retrofit by the end of the year, they're EU books unfortunately so we'll see
    •  
      CommentAuthordjh
    • CommentTimeJun 20th 2018
     
    I'd much rather breathe petrol fumes than ammonia fumes. Both because of the smell and because I'd live longer.
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