Flächenheizelement zur Erwärmung von Photovoltaikpaneelen

Electricity generation with more environmentally-friendly, a bid is the hour more exhaust-free[...] energy. Besides water power and wind power Is it Photovoltaic, which provides free of charge electrical energy. Photovoltaic uses the direct and the diffuse irradiation by the sun wherein 2 stand. The first is, because the production is possible only during the day, the latter is the snowfall and the layer of ice formation.

The invention relates to a system of panel heater with automatic ice incrustationsnow and the detection of the forward-looking.

[...] provides for the specific heat ( [...] ) by melting a During the day of the snow, at night, however, must be heated and the PV is-Panel alien to cold, just as during the day, when the [...] is so strong that the generated by the PV-panel same staff thawing not sufficient for a specific heat. [...] ( [...] ) which snugly and consistent with a on the rear side of the PV-panel Is glued, will ensure that an immediate snowfall fusion effect Is given at onset. The warmed up heating foil ( [...] ) the PV-panel so that on the power-generating surface has a temperature of + 2 °C is prepared. The required therefor is 80 W power, depending on the angle of the establishment or what^{flat being placed in view of the need for thawing temperature of + 2 per m 2 °C a connect load} of 120-160 W/m^{2 requires}. achievement calculation the situation Is of the PV- [...] What is essential for the.

In an arrangement with an angle of for example, 30 ° to the horizontal the problem of convection of the generated heat occurs here, what requires a higher connect load of the heating strip. It is therefore necessary to provide for thermal insulation ( [...] ) which prevents the temperature loss. Here an eminent problem occurs at full solar radiation and that is the PV ~ surface temperature reaches 120-140^{Q C} soft. A temperature-resistant insulating material used for these temperatures which It will therefore resistant Is.

Another problem is the power supply of the PV-panels, according to invention is solved the task thereby that each heating element has two connection lines for the feed and the second for the wherein a supply of the further-PV panels serves ground through. A line lead than feed pipeline carried out has a waterproof connector has a watertight plug coupling and the second lead wire, it will thus have a secure and lasting water as well as the rapid and rational mounting guaranteed forwarding ( [...] ). Supplying the heating foil takes place directly on the heating element by a waterproof T bonded-branch on which the connection lines are connected firmly and permanently.

[...] invention is further the security of the job of the heat transfer and heat distribution through the heating element and the resistance of the material used. according to invention a 3-conductor 230 °C resistance braid and a thin heating cable consisting of 2-2.5 mm is only connected temperature-resistant insulation of PTFE on a 5 mm grid spacing glass cloth net with firmly. This mat is 2er aluminium foil pay with glued and embedded within a compact panel heater so 0.2 mm starch yield. The very high thermal conductive aluminum flat and this transmits heat generated by the heating pipes distributed on the PV- [...].

The invention includes further timely detection of the falling outside temperature, as well as the control arrangement and configuration of the surface temperature of the the beginning of a PV- [...]snow. To this end, into a 3 mm ( [...] ) a strong aluminum plate A3 large Is more self-heated[...][...] of a decreasing temperature and onset of snowfall recognizes temperature sensor installed, 4-PV panels additional temperature sensor directly on the on Additionally [...] glued glass which the thawing temperature control. This control is equipped with a receiver of the switches on and off by radio, by mobile phone allows house control and digital.

As a result on the basis of the in Figures shown embodiments the invention is explained in more detail.

It shows [...][...] from the rear with the PV-$ move-finished in a drum leading connection lines. [...] shows the heating foil, which at the rear of the-PV panel [...][...] secured to the power-generating, 1 and 3 is connected adhesively. Paragraph 4 is represented, as a required thermal insulation 4 adhesively bonded to the heating foil is connected 3. In [...] the electrical supply is 230V from the general electricity network or from a storage battery with the heating foil represented, wherein in for other panels 3 and 4 the incoming stream is forwarded in the. It [...] the sensing panel shows a decreasing temperature and with the-snowfall is detected. The sensor 2 integrated in the aluminum plate 1 is so as to be flat, 3 is the line at which the measured temperature values (Photovoitaik-Kontroll) are added to the [...] pvc. In [...] the arrangement is the surface temperature of the PV-panels are detected. In the case that these have a temperature of more than 2 °C plus, the heating by the heating foils have been rendered impossible.