Naeem Hyder

Thanks juha for the help. But the thing is that, The average temperature of my generator would be around 102oC and I am not using glass tube only one tube(metallic) will work out and I am going to optimize the trough for max possible performance.

Hello everyone, I am an Engineering student currently working on a project. The project is to design and fabricate CSP (concentrated solar power) based vapor absorption refrigeration system. I hope everyone here knows about vapor absorption system and its components. The problem that led me to post here is that, I am using concentrated solar power from a parabolic trough as a heat source for my generator. The generator is actually a pipe which contains the refrigerent and absorbent solution(LiBr-Water),the generator is directly exposed to the concentrated solar light. Now I am all set with other components of the system, the only problem is: "I have T1 as temperature at pipe(generator) inlet and T2 as the temperature at exit and the 'Qg' is the heat transfer per second to the pipe through radiation, now how can I calculate the length of the pipe so that I get T2 as my exit temperature". It is easy to find the length of the pipe for me if the heat transfer is between two fluids but here as the source is solar light, so I am confused what I should do now? Thanks in advancs.