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Coal Generation G7.

Zoomup
Many old coal mines had their own electrical generators. They were self sufficient and had a good reliable supply for essential equipment like ventilation fans, water pumps, winder winch, lifting gear and coal cutters etc.  In the U.K. in about 1950 colliery generating plants were shut down and the supplies were obtained from the Electricity Boards. This was a bit of a shame really, as unmarketable grades of coal could be used at the colliery generating plants' boilers.


Now Old King Coal is an enemy it appears.

G7 to agree tough measures on burning coal to tackle climate change - BBC News


Z.
  • 0
    Copper production and sulphur/sulphur dioxide. The link........

    Copper Mining and Extraction Sulfide Ores (copperalliance.org.uk)



    Z.
  • 0
    Helios:

    mmmm afraid it is zoomup , and around 40% of the worlds electricity is from thermal coal , so a few more to close and be decommisioned, some are not very efficient either , only about 10coal plants achieve over 40% conversion of the coals energy into electricity kw theres the nox and sox also .


    Some say: Nitrous oxide is released into the atmosphere through agriculture, when farmers add nitrogen-based fertilizers onto the fields, through the breakdown of animal manure. Approximately 79 percent of all nitrous oxide released in the United States came from nitrogen fertilization.


    Can't waste heat from power stations be recovered and used to grow tomatoes or heat buildings etc?


    Z.


  • 0
    Zoomup:
    Helios:

    mmmm afraid it is zoomup , and around 40% of the worlds electricity is from thermal coal , so a few more to close and be decommisioned, some are not very efficient either , only about 10coal plants achieve over 40% conversion of the coals energy into electricity kw theres the nox and sox also .


    Some say: Nitrous oxide is released into the atmosphere through agriculture, when farmers add nitrogen-based fertilizers onto the fields, through the breakdown of animal manure. Approximately 79 percent of all nitrous oxide released in the United States came from nitrogen fertilization.


    Can't waste heat from power stations be recovered and used to grow tomatoes or heat buildings etc?


    Z.




    Some people are doing that on a small scale.  Generate their own electricity, and use the waste heat and CO2 to pump into greenhouses.


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    As per  earlier threads, you find you do need a LOT of plants to absorb CO2 at anything like the rate we are generating it.

    https://communities.theiet.org/discussions/viewtopic/348/27586?post_id=161125#forums-view-topic

    and

    https://communities.theiet.org/discussions/viewtopic/348/27561

    Mike
  • 0
    You do need a lot of plants mapj1 ,I think i do a calculation a few years ago , a 500MW biomass burning power station would need a forest of 1,000,000 acres to absorb its emissions , the fuel used is also an interesting calculation.
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    mmm the use of CO2 in market garden greenhouse ,has had some promising results one system claiming a 30% yield improvement for tomatoes , and as you might expect that nation that has both the soil and taken the market garden to its peaks (Nederland) has quite a bit trials , and your right about Nitrogen and field fertilisation although manure isnt such as problem as ammonia run off and it getting into the drainage ditches and forming larger pollution down stream. 

    CHP is interesting and where you have a small community and the summer temp rarely gets above 20oC , it makes sense , however the CHP starts to look wasteful when you have 6-8 months when you effectively dont need heating , and you use electricty for air conditioning. That said I think there are benefits for CHP on some locations , where you are using heat regulariley . Being as the texas grid has been under the spotlight since its failure in the winter storm of this year , its now under starin as some plants are out of action and the Texan people are cranking the air con up , causing a demand strain

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