Solar energy technology Page 25

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Diagram 25: Efficiency of the three most common collector types

English translation of technical terms and sentences in diagram 25:

= Efficiency diagram
Wirkungsgrad = Efficiency
a: Absorber = a: Absorber
b: Flachkollektor = b: Flat plate collector
c: Vakuumröhrenkollektor = c: Vacuum tube collector
Schraffierte Flächen kennzeichnen den Arbeitsbereich, in dem die Kollektoren überwiegend arbeiten
= The hatched areas represent the ranges in which the individual collectors are normally used
Temperaturdifferenz (tK Kollektor - ta außen) in K = Temperature difference (tK Collector - ta outside) expressed in K

Diagram 26 shows the collector energy yield of the most common collectors on the market today made by different manufacturers (in kWh/m²/year for Germany). This diagram helps to find the right collector for the customer's needs based on their price-performance ratios.

Diagram 26: Collector energy yield of some common collectors made by different manufacturers in kWh/m2/year for Germany

English translation of technical terms and sentences in diagram 26:

Kollektorertrag (kWh/m2a)
= Collector energy yield in KWh per m2 per year
Jährlicher Ertrag des Kollektors in einer
= Annual energy yield of a collector in a standard solar energy installation
VRK = Vacuum tube collectors
Flachkollektoren = Flat plate collectors
A,..., P = Different collector brand names
Kollektorertrag nach ITW
Universität Stuttgart
= Collector energy yield according to ITW - University of Stuttgart


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