Solar thermal collectors and applications

Stationary collectors

Solar energy collectors are basically distinguished by their motion, i. e. stationary, single axis tracking and two - axes tracking, and the operating temperature. Initially,

Table 1

Solar energy collectors

Motion

Collector type

Absorber type

Concentration ratio

Indicative temperature range (°C)

Stationary

Flat plate collector (FPC)

Flat

1

30-80

Evacuated tube collector (ETC)

Flat

1

50-200

Compound parabolic collector (CPC)

Tubular

1-5

60-240

Single-axis tracking

5-15

60-300

Linear Fresnel reflector (LFR)

Tubular

10-40

60-250

Parabolic trough collector (PTC)

Tubular

15-45

60-300

Cylindrical trough collector (CTC)

Tubular

10-50

60-300

Two-axes tracking

Parabolic dish reflector (PDR)

Point

100-1000

100-500

Heliostat field collector (HFC)

Point

100-1500

150-2000

Note: Concentration ratio is defined as the aperture area divided by the receiver/absorber area of the collector.

Fig. 1. Pictorial view of a flat-plate collector.

Подпись: Fig. 1. Pictorial view of a flat-plate collector.

the stationary solar collectors are examined. These collec­tors are permanently fixed in position and do not track the sun. Three types of collectors fall in this category:

1. Flat plate collectors (FPC);

2. Stationary compound parabolic collectors (CPC);

3. Evacuated tube collectors (ETC).

Solar thermal collectors and applications

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