Convegni ATI - Accesso riservato soci CTI

Autore: F. Ziegler, J. Albers, A. Kuhn, S. Petersen

Collana: CA - 61 - Perugia 2006

Note:
Absorption chillers which are driven by solar heat seem to perfectly match the requirements of summertime airconditioning.
However, not all commercially available machines really fit. Some specific requirements will be discussed in comparison to the state of the art and the research and development which are on the way.
The most severe restriction stems from the variability in insolation, outdoor temperature, and cooling need.
Basically, insolation and cooling need may be correlated in a way that the system operates self-controlled, but the outdoor temperature will play an important part with a negative impact. Indeed, we think that the cooling tower control turns out to be the most important handle to match supply and demand.
In addition, the chiller design itself has to allow for the variability. The required operational field is much larger than in conventional, steam fired systems. Moreover, the standard with regard to energy saving should be higher and often is not met. Both system and chiller design has to cope with this problem. Hybrid compressionabsorption concepts may be a future solution.