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apetley

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Posts posted by apetley

  1. Democrat Party, shut up, shut your mouths.

    If I had things my way, I'd have senior members of the Democrat Party put in prison for ten years, with or without remarks regarding whatever referendum.

    Bunch of Chinese-Thais, why don't you just go home to China ? We do actually know that you look the same as a load of Chinese people, even though nobody in Thailand dare say so.

    All of Thailand's political parties are packed with Thai-Chinese. Have a look at Puea Thai Cabinet group photos.

    Thai-Chinese are the ruling class whatever their political leanings.

  2. I want to get to parts of the world that still have coral, as I think with the rising

    temperatures of the oceans, as well as the continued pollution that is sent out to the

    ocean from countries that are near the coral, will be the end of a lot of coral around the

    world. I have been told by a few Australians as well, that some of the damage to the

    Great Barrier Reef is caused by pollution, and not just the ocean heating up.

    Geezer

    Elevated sea temperature the primary cause according to these.

    http://www.theguardian.com/environment/2016/apr/19/great-barrier-reef-93-of-reefs-hit-by-coral-bleaching

    http://www.bom.gov.au/oceanography/oceantemp/GBR_Coral.shtml

  3. Was he wearing a helmet?

    Dr Henry Marsh is probably England's # 1 neurosurgeon is also a keen cyclist - but he never wears a helmet because he says it's a waste of timeohmy.png

    http://www.telegraph.co.uk/news/health/news/10866273/Cycle-helmets-are-useless-says-brain-surgeon.html

    If he genuinely believes that it just goes to show that whilst being an idiot regards road safety he knows something about brain surgery.

    I'd suggest he tries headbutting a kerb stone, first wearing a cycling helmet then without.

  4. Interesting phrase in the OP " must be completed ahead of the next general election, which MIGHT be held next year."

    I hope that this is simply a "lost in translation" issue, but I have my doubts.

    First thing that caught my eye too. So the election has gone from 2015, to beginning of 2016, middle of 2016, to end of 2016, first quarter of 2017, June 2017, 3rd quarter of 2017 and now ' might be held next year'.

    Some might say a pattern is forming.

  5. APETLEY ---Referring to your post #802--- Keep thinking about the simplest design as you do.

    Other than generous pipe sizes, there is one factor I forgot; the steeper the angle of the plate obviously augers better for the turnover of the tank contents. This is really the "thermal pressure pump" if you'll allow. This would give George some grief how to set it, he being right on the equator? Can you enlighten us please George? What is the best angle all year round for steeper (as suggested) solar hot water panels without a pump and indeed solar P/V panels when fixed all year round?

    Hi. Years ago I came across an online book where a guy had constructed a simple box with a network of piping and as you say quite upright to get a better flow. As an aid to collecting sunlight he actually fitted an angled mirrored strip behind each pipe. I wish I'd kept the link but he said it worked very well.

  6. I've always thought about using a heat exchanger like that but even simpler. How about one at ground level and using the thermosyphon effect, heat rises, to let the hot water rise into a hot water tank higher up in the house, no need for the pump then.

    recirculating the water for best efficiency requires a pump.

    Agree a pump is more efficient at recirculating the water but interested in just how a effective a minimalist solution may be. The temperature of water in a garden hose can be unpleasantly hot so here in the tropics I suspect a passive siphoning effect of the hot water could warm a tank reasonably quickly.

    Interested to hear from anyone with a better knowledge of physics who can crunch some numbers on the subject :)

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