solfångarens

A solfångare, Swedish for solar collector, is a device designed to capture solar energy and convert it into useful heat. These collectors are typically installed on rooftops or in open areas with good sun exposure. The primary function of a solfångare is to absorb sunlight and transfer that energy to a fluid, most commonly water or a mixture of water and antifreeze. This heated fluid is then circulated through a system to provide hot water for domestic use, or to supplement space heating in buildings.

There are several types of solfångare, with the most common being flat-plate collectors and evacuated tube collectors. Flat-plate collectors consist of an insulated box with a transparent cover, a dark absorber plate, and tubing for the heat-transfer fluid. Evacuated tube collectors utilize a series of glass tubes, each containing an absorber fin, with a vacuum between the outer and inner glass layers to reduce heat loss.

The efficiency of a solfångare depends on factors such as its design, the intensity and angle of sunlight, ambient temperature, and the efficiency of the associated heat distribution system. Solfångare are a key component of solar thermal energy systems, offering an environmentally friendly and renewable method of heating. They contribute to reducing reliance on fossil fuels and lowering energy costs.