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Capturing solar energy

The solar collector includes:

* A plaque and black metallic tubes. They are the absorber. It is the heart of the “solar system”, which receives solar radiation and heats up;

* A safe rigid and thermally insulated around the absorber. Its upper part, glass, lets in the sun and retains heat like a small greenhouse.

The assembly is usually placed on a roof.

Transport heat

The role of the primary circuit

Waterproof and insulated, it contains water mixed with antifreeze. This liquid is heated by passing through the tubes of the sensor, and goes to a storage tank.

Restore heat

There, through a heat exchanger (coil), it transfers its calories solar water heating.

The primary liquid-cooled, again towards the sensor, where it is heated again until the sun is still effective.

Store hot water

The solar balloon is a metal tank well insulated. It is the subject of domestic water. The hot water is withdrawn immediately replaced by the same amount of cold water from the network , heated in turn by the liquid coolant.

Circulate the coolant

The liquid circulation can be natural or forced:

* In the first case, the liquid coolant circulates through the density difference with water balloon. Until it is warmer, less dense that it rises naturally through thermoregulation. The ball must be placed above the sensors. On this principle are designed solar water heaters “in thermosyphon”;

* In the second case, a small electric pump, the pump, sets in motion the coolant when it is hotter than hot water balloon. Its operation is controlled by a device control exploiting the differences in temperature: if the probe ball is warmer than the sensor, regulation cuts the pump. Otherwise, the pump is restarted and the primary liquid heats the hot water balloon.

The shortage of sunshine

Throughout the metropolis, we must deal with bad times (winter, spring and autumn, long period of bad weather). Solar energy can then ensure the entire production of hot water. Also, the balloon is equipped with a booster that takes over when needed, and restores the stock of hot water. These may include:

* A resistance (electric boost), often located halfway up the solar balloon;

* A heat exchanger (Hydraulic booster) connected to a boiler ((gas, oil, wood) located downstream of the ball.

A second balloon fitted with an electric heater can also be used as extra.

Frequently Asked Questions

  1. QUESTION:
    How is the greenhouse effect used in passive solar heating?

    • ANSWER:
      sunlight passing through a pane(s) of glass is converted from short wave IR to long wave IR (heat) and is trapped by the glass, as the glass passes the shorter waves ans will not pass the longer ones, hence the build up of heat inside the glazed area.

  2. QUESTION:
    solar heating and global warming/greenhouse gas (homework help)?
    im doing an acrostic for solar heating, and for letter G i was going to do global warming or greenhouse gases but can someone explain the relationship between them in a way i can understand? please and thanks, easy 10 points?

    • ANSWER:
      I’m going to start by saying “if these exist” just so no one can get mad at me for taking sides.

      (1) Global warming the the literal warming of the globe. Earth gets warmer. Simple. Some people think it’s totally natural.

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      (2) Greenhouse gases are gases that absorb and trap heat close to the surface, so that the globe warms more than it would if those gases weren’t there. These gases are both naturally and artificially occurring.

      The association is if we accept that global warming is taking place, some people believe that it’s only happening (or happening more) because of greenhouse gases – the artificial kind. If Man is putting out lots and lots of CO2, for instance, then that could artificially raise the temperature of the globe. It’s greenhouse gas, just with the spin that it’s all man made. If greenhouse gas is artificial, then global warming must be artificial, or so goes common wall-to-wall thinking by people who can’t see how artificial and natural can work together.

      (A) Global warming is warming, because of something like orbit (I’m not arguing to that, it’s just an example)

      (B) Global warming is warming, but worse because of natural greenhouse gases

      (C) Global warm is completely artificial, and wouldn’t happen without artificial greenhouse gases.

      * I would go with option B if I had to choose, but I’ll leave you up to your own devices.

  3. QUESTION:
    I would like to purchase a solar panel and heating system for my greenhouse, Is this possible?

    • ANSWER:
      Your greenhouse essentially IS a solar panel so to supplement that you would need it set up where it would not cast a shadow on the greenhouse.
      While it could certainly be done your biggest concern is preventing frost in the greenhouse and that is only likely at night when there is no sun. So somehow you would need to store heat which might make the solar system a little more complicated than it’s worth. If there is any part of your greenhouse that catches the sun, such as a path down the middle, you could line it with dark colored bricks.

  4. QUESTION:
    Northern Utah , how much would it cost to install a misting system and heat or solar for Greenhouse?
    My green house is 48 square feet. How much would a misting system or electrical cost me? Right now, I am having a bucket filled with water, 30 gallons. And a fan running. I m building a soaking panel, but it’s not finished yet.

    • ANSWER:
      For about , you can get a kit by Arizona Mist at a home improvement store that’s about 10 feet of tubing and a set of 5 misting nozzles. You can buy multiple kits to splice them together to make whatever sized system you need. If you have more than one tube connected, though, you should use the 3/8 inch tubing instead of the cheaper 1/4 inch.

      Here’s a website that features the various products that Arizona Mist puts out: http://www.mrdrip.com/arizonamist.htm

      Electrical would be a few hundred dollars, depending on how far the cabling has to be run and whether you have room on your main electrical panel for a new breaker. It would also have to be GFCI, since it’s outdoors.

  5. QUESTION:
    Would using my foundation as a passive solar heat sink be a good way to reduce my winter heating bills?
    I’m just worried that the heating and cooling of my foundation might cause damage to my house.

    http://www.greenhousegrowing.co.uk/naturally-heating-greenhouse.html

    http://www.yoursolarhome.com/solarsheat.com/about_ysh/mediaVideo7.html

    • ANSWER:
      not really


solar greenhouse heating

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