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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.

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    •  
      CommentAuthorSteamyTea
    • CommentTimeFeb 7th 2012
     
    Going with the solar flux here at the moment :cool:
    •  
      CommentAuthorSteamyTea
    • CommentTimeFeb 7th 2012
     
    Had a little play with my data and this is the first chart I have done looking at my energy use on the main circuit which has the 1 kW fan heater plugged into it. I was in all that day working, so kept the kitchen, where I work at a steady 21C, min of 19C, max of 22.7C over the whole 24 hours.
    Now some of the other loads on the main circuit are the shower, kettle, cooker, PCs, as I have averaged the 6s sampling to every 10 minutes, it is a little hard to tease out exactly what is on. But as I had was up at 6 AM, the heater and kettle went on then, shower about 7:30, more tea, settle down to work, spot of lunch at 12:30 PM, more work, then cooked supper at about 18:45 PM.
    Be interesting to see if other days follow this pattern.
      30-01-2012 Solar and Power.jpg
    •  
      CommentAuthorDamonHD
    • CommentTimeFeb 7th 2012
     
    Good correlation between solar flux and electricity demand between 10am and 11am. I feel a strange urge to know exactly what you were up to as the golden rays of the sun caressed your skin...

    (Bleeding brass monkeys round here all day; some golden rays but no caressing...)

    Rgds

    Damon
    •  
      CommentAuthorSteamyTea
    • CommentTimeFeb 7th 2012
     
    Posted By: DamonHDI feel a strange urge to know exactly what you were up to as the golden rays of the sun caressed your skin...

    Breathing the Cornish air.:cool:
    • CommentAuthorJoiner
    • CommentTimeFeb 8th 2012
     
    Reading Barbara Cartland again, you two? :crush:
    •  
      CommentAuthorSteamyTea
    • CommentTimeFeb 8th 2012
     
    Daphne Du Maurier down here :cool:
    •  
      CommentAuthorfostertom
    • CommentTimeFeb 8th 2012 edited
     
    Mandereley = proto-Cartland
    One for you ST
    http://www.amazon.co.uk/Wave-Hub-Chronicles-Lucy-Wells/dp/0956936792/ref=sr_1_1?ie=UTF8&qid=1328704044&sr=8-1
    new, not in stock yet it seems, well reviewed in Resurgence.
    •  
      CommentAuthorSteamyTea
    • CommentTimeFeb 8th 2012
     
    Be a case of throwing good money after bad as it is sitting there idle, Lucy may be the only one to profit from it. Have been working with an engineer who is involved with it, all a bit of a disaster and people loosing faith in the marine renewables field rapidly. :sad:
    • CommentAuthorJoiner
    • CommentTimeFeb 8th 2012 edited
     
    What's the book about? Thought it was obvious from the cover, but on the Amazon page, lower down, you get...

    "Active discussions in related forums"

    Discussion / Replies / Latest Post

    God Does Not Exist Because / 7698 / 3 minutes ago

    The only way to heaven / 15 / 44 minutes ago

    Doomsday 2012/ 229/ 59 minutes ago

    Evidence for a Creator / 6230 / 1 hour ago

    There is God and God created the Universe/
    53/ 1 hour ago

    Redknapp and thems Bible./ 3/ 2 hours ago

    The lack of a soul/ 90/ 2 hours ago


    ...What the heck kind of machine is that thing?? :shocked:
    •  
      CommentAuthorSteamyTea
    • CommentTimeFeb 8th 2012 edited
     
    A big one, bigger than big.
    Oh, and secret, secret is it never being allowed out to play :wink:
    •  
      CommentAuthorfostertom
    • CommentTimeFeb 8th 2012
     
    Disgusting! Letter to Telegraph wd be in order.
    • CommentAuthorseascape
    • CommentTimeFeb 9th 2012
     
    ST I think you should get up later, cook your main meal in the middle of the day, have less cups of tea and go to bed at 7pm :)
    • CommentAuthorJoiner
    • CommentTimeFeb 9th 2012
     
    :bigsmile:
    •  
      CommentAuthorSteamyTea
    • CommentTimeFeb 9th 2012 edited
     
    Posted By: seascapeST I think you should get up later, cook your main meal in the middle of the day, have less cups of tea and go to bed at 7pm :)

    Apart from the getting up later, it is about what I do, oh and the tea, is 7 mugs before 8am too much?
    :cool:
  1.  
    What I want to know following on from this discussion is how much more solar energy will be captured with a tracker rather then a straight forward south facing array. Looking at a zenith z20 on the farm but was going to just incorporate the concentrated collector into a new south facing barn roof we will be erecting this year. Maybe the tracker would be the better option.
    •  
      CommentAuthorDamonHD
    • CommentTimeFeb 9th 2012
     
    Look at PVGIS: it will compute the results of 1-axis and 2-axis tracking for you.

    Rgds

    Damon
  2.  
    Posted By: DamonHDLook at PVGIS: it will compute the results of 1-axis and 2-axis tracking for you.

    Rgds

    Damon


    Looking at that it appears to be approx 20% extra for a tracker
  3.  
    So, is it possible to quantify(ish) the loss of thermal gain caused by me painting my house. It was (and some still is) grey render and it is now becoming light yellow. I can tell you that after a day of big sun (ie 5-6 months of the year) just walking along the balcony after the sun has set allows you to feel significant heat from the wall - when I painted one section the difference was remarkable! The walls face SW and SE and are solid stone 40cm thick with plaster on cement inside, no insulation. Sadly, our need for cool in the summer outweighs our desire to save wood in the winter and the render is capillary open and the stone hygroscopic, so I guess the answer to my question doesn't matter but v interested in whether the loss of gain (!) is significant in terms of my wood usage.

    Gut instincts for the scale of the issue hoped for rather than long sums based on assumptions various...of course some on here love that sort of thing! :smile:
    •  
      CommentAuthorSteamyTea
    • CommentTimeFeb 9th 2012
     
    Posted By: Gotanewlifeso I guess the answer to my question doesn't matter but v interested in whether the loss of gain (!) is significant in terms of my wood usage.

    Gut instincts for the scale of the issue hoped for rather than long sums based on assumptions various...of course some on here love that sort of thing!

    You will probably lose less in the winter than you gain in the summer, if you use air conditioning as the total energy levels are lower. But is an excellent question and one that may be worth looking into more. I still have the data from those 'tile test' I did summer before last.

    Posted By: renewablejohngoing to just incorporate the concentrated collector into a new south facing barn roof

    Not sure if I have got this right, but if it is parabolic collector or mirrors that mimic it, then cloud cover is your enemy. Have you done an analysis of cloud cover and frequency?
  4.  
    Thanks ST. I don't use AirCon we just used to get too hot! I do have a huge extractor fan (2m3/sec) that runs when the outside temp is lower than inside but it is still not an offset. Nevertheless, you tenor is 'not much more wood' I think.
  5.  
    Steamytea

    The zenith Z20 is a parabolic tracker focussing on a concentrated PV which is claimed at 38% electric efficiency made by the ESA. As an alternative will use the concentrated PV with a flat roof collector (fibre optic) splitting the wavelengths into PV and Infra Red.
    •  
      CommentAuthorfostertom
    • CommentTimeMar 18th 2013
     
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