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Specialized in the installation of solar panels, solar water heaters with the highest efficiency of solar energy. Price Solar. Cost solar panels info? Installer of solar panels and solar water heaters. – PowerPoint PPT presentation

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Title: Zonneboilers

A solar water heater, how does that work?
  • Let us take the example that everyone knows, a
    hose full of water for a while in the
    sun. Gradually heats the water in the hose on. We
    now put a glass tube around, it can even boiling
    hot water. Well, the same principle is used in a
    solar water heater. 

  • Generally you a collector of 1m ², which to the
    south is directed and an inclination of 45 ,
    about 50 liters of water heating. Calculation of
    the total collector area that you need will
    depend on the insolation level (climate,
    orientation) and the number of users. This
    calculation is part of the MiNi Power for
    study. generally assumed that the average person
    between 40 and 60 liters of hot water per day
    consumed. An average family of 4 will be a
    storage need of approximately 200 liters and a
    collector ar

  • In Belgium the sun at an average annual capacity
    of approximately 1,000 kWh per m², which
    corresponds to the energy value of about 100
    liters of fuel oil or 100 cubic meters of natural
    gas.  In a correctly sized system, we can cover
    up to 60 of the annual energy for domestic hot
    water.  Even with diffuse sunlight may be a high
    energy place in the vacuum tubes. In the spring
    or fall and even in winter there are days enough
    to take advantage of water warmed by the sun.


  • The solar collector captures the sunlight and
    converts it into heat. The collector transfers
    the heat to a glycol by liquid, this liquid
    circulates in insulated piping between the
    collector and the storage tank. The liquid is
    contained in the collector the heat to the water
    in the storage tank. The cooled liquid is then
    pumped back to the collector to re-heat. We can
    distinguish two types of collectors
  •  Flat-plate collectors the absorber consists of
    a black metal plate on which copper tubes are
    mounted. These tubes are parallel or helically
    mounted.  Vacuum tube collectors , the absorber
    consists of vacuum tubes in glass with a black
    metal tube inside which a heat transfer fluid
    passes through.

  • MiNi Power insert collectors which make use of
    the "heat-pipe" technique. The cream of the crop
    in the vacuum tube collectors.
  • A heat pipe is a transport mechanism that large
    amounts of heat can move.  In a heat pipe, there
    is a transport medium, which is on the hot side
    evaporates, whereby the energy absorber, and act
    as gas moves to the cold side.  Here it will
    condense and are heat certificates to the
    condenser.  This is the top of the solar
    collector, and then again after cooling back to
    the warm side.

Storage vessel
  • The storage ensures that the heat is kept until
    the time that hot water is needed.  The hot water
    that you get out of this storage, is immediately
    replaced by the same quantity of cold water from
    the pipe, which in turn is heated by the heat
    transfer fluid from the primary circuit.  With
    sufficient sunlight in the summer, the solar
    collectors to the water in the storage easily
    warm to above 80 C. To burn the warm water to
    prevent the sanitary hot water output a mixer
    installed.  The storage tank is highly insulated
    metal tank, MiNi Power uses only stainless steel
    vats with high density polyurethane insulation
    45mm. This stainless steel storage tank is the
    reserve of hot water.

The collector circuit
  • Heat transport is the responsibility of the
    primary circuit. This circuit is hermetically
    sealed and heat insulating and includes the heat
    transfer fluid. This fluid heats up while passing
    through the tubes of the collector is running,
    and is then diverted to a storage vessel.  again,
    the heat release is performed by a heat exchanger
    (coil pipe) in the storage tank. Here the liquid
    its solar alter the sanitary water (secondary
    circuit). The cooled primary water goes back to
    the collector where it is heated again as long as
    the sun shines.  To freeze the solar fluid to
    prevent a non-toxic mixture of water and
    glycol. This fluid provides freeze protection to
    -25 C and can withstand high temperatures. This
    allows the system even in winter correctly.

The control and pump unit
  • The primary fluid may circulate in different
  • naturally (without a pump), the heat transfer
    fluid circulates, thanks to the density
    difference with the water in the storage
    vessel.As soon as this liquid is warmer, and thus
    a lower density than the water in the vessel, it
    will start to rise in a natural way by
    thermo-circulation. The vessel must be placed
    higher than the collectors.  That is the
    principle on which the thermosyphon solar water
    heaters based, which is usually found in southern
  • in forced manner (under pressure) a small
    electric pump, circulation pump, transfers the
    heat transfer fluid in motion when 8 C warmer
    than the hot water in the storage tank. The pump
    is controlled by a control system that operates
    on  the basis of temperature differences when
    the sensor of the container is warmer than that
    of the collector, the system will stop the
    circulation pump. In the other case, the
    circulation pump again put in motion and the
    primary fluid heats the domestic water from the
    barrel again.

How the lack of sunlight catch?
  • In summer the solar vouch for the entire hot
    water production, but in the winter or during
    long periods of bad weather sufficient solar
    energy is not only for the production of all hot
    water. Therefore, most storage vessels equipped
    with an auxiliary system that takes up the torch
    and still guarantees the supply of hot
    water. This is usually done by
  • a resistor (electrical assistance), which often
    is located at half the height of the storage
  • a heat exchanger (hydraulic support) that is
    connected to an auxiliary source of heat. In most
    cases, is that the boiler of the central heating
  • In a dual-boiler is the heat exchanger for
    reheating at the top of the container. In this
    way, the reheating is not the whole reservoir to
    heat. A storage tank with a heat exchanger is
    placed on the existing boiler which then allows
    for reheating.

  • Specialized in the installation of solar panels,
    solar water heaters with the highest efficiency
    of solar energy. Price Solar. Cost solar panels
    info? Installer of solar panels and solar water
  • http//www.mini-energietechniek.be
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