Solar collector. Solar water heating installation. Encyclopedia of radio electronics and electrical engineering

Encyclopedia of radio electronics and electrical engineering / Alternative energy sources

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Obtaining hot water, which can be used in hot water supply and heating systems, as well as for various technological needs.

Collector design (Fig. 3.4)

The collector absorber is made of 152 mm wide aluminum profiles with a selective coating. The coolant flows through copper tubes pressed into an aluminum profile on the reverse side. The absorber is installed inside a shell made of two-layer cellular polycarbonate with transverse channels, which suppresses convection in the space between the outer and inner walls of the shell. The internal volume of the collector is sealed with lids installed at its ends.

Fig.3.4. Solar collectors

The performance of the collector depends on the climatic conditions of the place where it is used. In sunny weather, 150 liters of water can be heated to a temperature of 60-70°C per day.

The collector can be used in the entire range of climatic conditions in Russia, except for extremely cold zones, where its performance has not been studied.

The collector's warranty period is 10 years (determined by the warranty conditions of polycarbonate suppliers).

Areas of use

Renewable Energy:

• solar installations for hot water supply and heating of individual houses, cottages, dachas, etc.,
• solar hot water supply systems for municipal, industrial, domestic and agricultural purposes (hotels, boarding houses, catering facilities, laundries, livestock farms, etc.).

In Fig. 3.5 shows a diagram of the practical use of collectors in water heating installations.

Fig.3.5. Water heating plant

Features and Benefits

The design of the solar collector (housing, absorbing panel) uses special profiles made of corrosion-resistant aluminum alloy. The body of the solar collector is painted in any color by applying polyester powders in an electrostatic field.

High consumer properties of SC are achieved:

• high optical characteristics of a multilayer selective absorbent coating (SAP), which is applied to the surface of the absorbent panel using the vacuum deposition method. SPP and the method for its production are patented by NPO Mashinostroyenia;
• manufacturing of the absorbing panel and the SK body from special profiles based on a corrosion-resistant aluminum alloy.

In table. 3.1. technical characteristics of solar collectors are given.

Table 3.1. Technical characteristics of solar collectors

η - instantaneous efficiency of the solar system, Ta - average coolant temperature, °C, Tv - ambient air temperature, °C, I - solar radiation flux in the solar radiation plane, W/m2.

Efficiency: the collector provides heating of 120 liters of water per day to 60°C, subject to illumination of ~ 800 W/sq.m. Warranty period 5 years, service life 25 years.

Author: Magomedov A.M.

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