Zonneboilers

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A solar water heater, how does that work?
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• 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. 

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• 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

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• 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.

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Schema

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Collectors

• 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.

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• 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.

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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.

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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.

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The control and pump unit

• The primary fluid may circulate in different
  ways
• 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
  Europe. 
• 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.

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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
  vessel. 
• 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
  system.
• 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.

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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.
• http//www.mini-energietechniek.be