Although there are already studies in the literature but not much , the use of potassium formate/water or potassium formate+LiBr/Water are not available in the commercial sector for absorption refrigeration systems? what is the actual reason ?
Dear Cenker Aktemur please see these potentially useful articles entitled "Thermodynamic evaluation of new absorbent mixtures of lithium bromide and organic salts for absorption refrigeration machines" and "Performance evalution and simulation of a new absorbent for an absorption refrigeration system" which are available on RG (unfortunately not as public full texts).
Article Performance evalution and simulation of a new absorbent for ...
Article Thermodynamic evaluation of new absorbent mixtures of lithiu...
Frank T. Edelmann I know these articles. but these articles are not a answer to my questions. I wonder why potassium formate/water are not employed in commercial absorption refrigeration systems ?
Dear Cenker Aktemur I'm not an expert in this field and therefore cannot provide you with a final answer. However, I found a report on the use of potassium formate/water (see attached) in which some severe corrosion problems were observed. They are listed on p. 21 of this report:
Besides very good results in thermal aspect, Freezium and Pekasol 50 exhibits some problems in material compatibility. This could be summarized as:
- We have observed very aggressive reaction to zinc;
- Copper pipes in contact with copper were covered by blue/green (somewhere some white layers formed at the top of this coating);
- All steel surfaces where coating was damaged corroded significantly;
- Some gaskets in valves were damaged and valves leaked.
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