10.07.2015   EUROSUN 2008

Charging processes

During the charging process, as no fluid flows through the absorber, the calculated absorber temperature is directly linked to the composite temperature at the interface by:

— к

Подпись:

c

Подпись:

К / a (Tc — T )

Подпись: (eq.12)

Fig.5: Comparison between experience (interface absorber/polymer (o), interface PCM/polymer (A) and polymer (□) temperature) and simulation (interface absorber/polymer (—) and polymer (—) temperature) in charging

process
Подпись: Fig.5: Comparison between experience (interface absorber/polymer (o), interface PCM/polymer (A) and polymer (□) temperature) and simulation (interface absorber/polymer (—) and polymer (—) temperature) in charging process

With an exchange coefficient of 130 W. m-2.K-1 we obtain the temperature profile plotted in figure 5. The simulated temperature profile at the middle of the composite is situated between the two recorded experimental temperatures.