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Mass flow, pressure drop, and leakage dependent modeling and characterization of solar air collectors

: Welz, C.; Maurer, C.; Lauro, P. di; Stryi-Hipp, G.; Hermann, M.

Fulltext urn:nbn:de:0011-n-2756583 (554 KByte PDF)
MD5 Fingerprint: f81859857fb6c58769993156873fe681
Created on: 12.2.2014

Häberle, A.:
SHC 2013, 2nd International Conference on Solar Heating and Cooling for Buildings and Industry : September 23-25, 2013, Freiburg, Germany
Amsterdam: Elsevier, 2014 (Energy Procedia 48)
International Conference on Solar Heating and Cooling for Buildings and Industry (SHC) <2, 2013, Freiburg>
Journal Article, Conference Paper, Electronic Publication
Fraunhofer ISE ()
Solarthermie und Optik; Solarthermie; Wärmeübertragung und Wärmetransport; flow; drop; leakage; system; collector

In comparison to liquid collectors, the thermal efficiency of air collectors strongly depends on the mass flow, and often air collectors can be leaky. Further, for efficient system operation, the air collector’s mass flow will be chosen regarding the auxiliary power demand of the fan caused by the pressure drop of the system. In this work the interdependency between thermal and hydraulic behavior and the resulting primary energy demand will be explained. Moreover, suitable mass flow dependent models for thermal efficiency, pressure drop and leakage will be presented. Because of the mass flow dependent correlation of the thermal power gain and the auxiliary power demand, a novel characterization method for air collectors will be proposed considering both.