Unpressurized solar panel



Inox-Inox 100L unpressurised solar panel 1-2 persons

Solar panel kit for 1-2 persons

Solar panels equipped with the new direct absorption technology produce the thermal energy needed for the production of domestic hot water and for the preparation of the thermal agent used to heat homes, public institutions, businesses and swimming pools.
The main advantage of the new direct absorption solar panels is that the hot glycol comes into direct contact with the glass tubes and the heat transfer is maximised, compared to heat pipe panels where the heat transfer is via several heat exchangers (the glass tube gives up heat to the aluminium fins which in turn give up heat to the heat pipe and then heat is given to the collector where the glycol is located).
Due to the lack of damageable components, direct absorption panels benefit from a 25 year warranty which can be extended according to each distributor’s policy.
The efficiency of direct absorption solar panels is up to 30% higher than heat pipe panels and up to 50% higher than flat panels. The solar panel will be mounted on the south side to benefit from maximum efficiency.
Solar panels equipped with the new direct absorption technology and the CPC insulated mirror represent the state of the art and the latest inventions and innovations in solar panels. The CPC insulated mirror layer is applied directly to the back of the outer glass tube and helps to recover solar radiation from the sides of the inner tube that is normally lost and to stop heat loss through the shaded surface of the glass tube (back of the tube). In summer by simply twisting the tubes, the operation of the solar panel can be reduced or stopped by shading the CPC insulated mirror, which is oriented towards the sun.
The advantages compared to other solutions on the market are :
– by attaching the CPC insulating mirror directly to the glass tube, it does not allow dust and impurities to deposit on the surface of the mirror, dust and impurities that block solar radiation.
– by attaching the CPC insulating mirror directly to the outer glass tube and not to the inner one, it allows blocking heat loss through the shaded surface of the glass tube (back of the tube).
Extremely simple assembly allows the installation of direct absorption panels by any authorized installer. The expansion vessel ensures the condensation of overheated glycol and its reintroduction into the circuit eliminating the risk of evaporation.
These types of solar panels, together with a solar boiler and an automation station, create a complex solar system that works all year round (regardless of the outside temperature). The solar system can be connected to any type of heating system in the building.
The construction variants are:
– 18 tubes, product code TMC18 1.55mX1.85m
– 25 tubes, product code TMC25 2.15mX1.85m
– 30 tubes, product code TMC30 2.55mX1.85m

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The solar panel consists of:
– Vacuumed glass tubes;
– Horizontal heat exchanger;
– Fixing bracket made of duralumin/stainless steel;
– Expansion vessel;
– Fasteners, accessories, screws, nuts, silicone and rubber gasket, etc.
– The glass tubes have a double-walled, thermos-type construction with a vacuum level between the glass walls of 5Ɨ10-3 bar.
– The outer tube is 58 mm in diameter and 1800 mm long.
The inner glass tube is coated with two selective layers, one layer is of Al-N-Al type which is designed to increase the absorption level of infrared radiation in the visible range of solar radiation up to 95%. The second layer is designed to refract the thermal radiation inside the tube to be taken up by the thermal agent and thus produce up to 810kw/h/mp/year.
The glass used to manufacture the tubes is borisilicate type 3.3 being hail resistant.
The glass tubes play a very important role in the operation of the solar panel, they perform the following functions:
– absorb infrared radiation in the visible range of sunlight
– refract thermal radiation to the inside of the glass tube until it is taken up by the thermal agent
– they insulate the thermal system very well by absorbing infrared radiation from the external environment
– Inside the glass tubes, the thermal agent that picks up the solar thermal radiation and converts it into thermal energy even if the sky is overcast.

The position of the evacuated glass tubes on the support of the solar panels is always inclined, which gives them a high resistance to hail impact and, on the other hand, the thermal agent with the highest temperature is continuously on top due to the thermosiphon phenomenon heating the thermal agent in the heat exchanger.
The heat exchanger is made of stainless steel and is designed to take up the heat energy produced by the solar panel tubes. The heat exchanger housing is 2 mm thick and made of stainless steel resistant to the harsh conditions imposed by the external environment. The thermal insulation of the heat exchanger is made of high-density polyurethane with a thickness of 50 – 60 mm, insulation that besides having the lowest heat transfer coefficient with the outside also has the role of increasing the mechanical strength of the equipment.
Due to the high capacity of the heat collector, direct absorption panel systems have very low hydraulic losses and can be sized in groups of up to 200 tubes/installation and are not limited to 120 tubes/installation as with heat pipe panels.
The inlet and outlet of the heat exchanger is 22/28 mm diameter pipe. The connection with external equipment is made by means of a removable elastic connector, it takes up expansion and displacement due to expansion.
The solar panel support is made of duralumin/stainless steel U-profiles which gives it mechanical strength and corrosion resistance. The thickness of the profile, the shape, the structure and the way of fixing give the solar panel stability in difficult atmospheric conditions (strong wind, thick snow, etc.).
The tilt angle of the support can be 20Ā° – 90Ā°.
The solar panel works all year round, regardless of the outside temperature. There is no danger of frost during operation because glycol is used in the solar system circuit, which can withstand temperatures down to – 40Ā°C. To reduce heat loss on the connecting pipes, they are insulated with high temperature resistant materials.
The solar panels meet all the requirements of national and international legislation and environmental standards. By using solar panels on each building, fuel consumption is reduced and significant amounts of pollutant emissions into the atmosphere, especially COĀ², are eliminated.

Solar panel with 25 year warranty.

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