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The use of solar energy is what the collectors from the AHI Carrier Vitosol range allow. They are used either only to heat the DHW or additionally to support existing boilers with central heating. In this way, you can use up to 60 percent less energy to heat the DHW or reduce the total heat requirement by up to 35 percent if the DHW and heating are heated together.
When installing a new heating system as part of a new construction or retrofit project, Vitosol solar collectors must always be considered during the planning phase. These investments do not only pay off in terms of energy savings. They are also supported by government subsidies. Moreover, this is a big plus for the environment. This is because the collectors convert solar energy into thermal energy without carbon dioxide emissions. CO₂ Neutral heating is the motto.
There are two types of solar collectors - flat and tubular. Both of them convert solar energy into heat energy using an absorber. However, they differ in the principle of operation of the parts. Tubular collectors, for example, are made up of tubes, from which they get their name. The absorber is located inside a tube surrounded by a heat-insulating vacuum. The heat transfer fluid does not pass directly through the tubes. This is because AHI Carrier tubular manifolds work on the principle of a heat pipe. The heat transfer fluid passes through a heat exchanger, which is also called a collector. The working medium evaporates inside the heat pipe and transfers heat to the heat transfer fluid through the Duotec twin-tube heat exchanger. This guarantees optimal heat transfer. Absorbers in a flat plate collector, on the other hand, are copper or aluminum sheets that absorb the sun's rays. Pipes connected to these absorbers direct the liquid through the manifold.
AHI Carrier Vitosol Tubular collectors contains highly selective absorbers, thanks to which a high level of efficiency is achieved. This is facilitated by the fact that the absorbers are located inside the tubes. This protects them from weathering and pollution, which in turn ensures a consistently high energy utilization. In addition, heat loss is low due to the particularly efficient thermal insulation of the vacuum.
AHI Carrier Vitosol products are quick and easy to install. They come in pre-assembled modules. The tubes can be rotated, which makes it much easier to replace individual tubes. The connection is made using corrugated stainless steel push connectors.
In the AHI Carrier product range you will find the following models:
The basis of the Vitosol series flat-plate collectors is a meander-shaped absorber located under a durable and highly transparent protective panel made of special glass. High-quality materials guarantee constant tightness and high system stability. With Vitosol 200-FM and Vitosol 100-FM, up to twelve solar collectors can be quickly and easily connected together. This is possible with above-roof installation, roof integration, or installation on collector supports.
In the Viessmann product range you will find the following models:
Collectors are only one part of the solar thermal system. In addition to piping, heat exchangers and pumps, DHW cylinders are the key to the efficient backup use of solar energy to provide heating and hot water. With the help of a cylinder, energy that is not currently required can be temporarily stored for later use. AHI Carrier offers a special product package for this purpose: Vitosol 141-FM - consisting of two Vitosol 100-FM flat collectors and a 250-liter Vitocell cylinder.
In order to ensure high operational reliability and a long service life, AHI Carrier has developed ThermProtect, an automatic overheating protection system. This means that the manifolds shut down when a certain temperature limit is reached. This happens regardless of the system configuration, control settings and location of the collectors. Due to different technical requirements, overheat protection works differently for flat and tubular collectors.
For example, the crystal coating of the absorber Vitosol 200-FM and 100-FM changes as soon as the limit temperature is exceeded. When the temperature drops again, the crystal structure returns to its original state. This process is reversible and permanently available.
In tubular manifolds, on the other hand, the heat pipe principle provides a temperature-dependent shutdown. Solar energy evaporates the heat transfer fluid in the heat pipe, which is liquefied again in the condenser. The resulting heat energy is transferred to the system. ThermProtect here means that the medium can no longer condense at a temperature of 120 degrees Celsius.
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