| The last time I sent a posting on my appropriate technology solar refrigeration systems and my need for assitance in presenting the work at the London South Bank University organised conference in Cyprus (October 2004, I recieved very harsh comments).
I have have tried to place the pictures of the system here for those who are interested. Hope it works.
src="http://www.otherpower.com/images/scimages/585/solar_refrigerator_side_view.jpg" width=80%>
If this does not work then you could also try
http://www.freewebs.com/julius_tangka/
The techincal details including the performance evaluation are available at,HPC 2004 Congress Secretariat- Faculty Engineering, Science and the Built Environment London South Bank University.
The genrator is located inside the solar collector at the back of the system.
During the generation cycle, the ammonia in the anmmonia /water contained absorber is vaporised and driven off. At the top of the system, the air cooled condenser transforms it to a saturated liquid which flows by gravity through a check valve into a liquid reciever. The liquid ammonia flows through a restrictor into the evaporator located inside the unit. Block off the solar radiation onto the gernator and allow the system to cool. The resultant pressure drop will cause the ammonia to boil absorbing heat. The vaporised ammonia is reabsorbed into the genrator.
COP= 0.95. At Miday in Dschang, Cameroon, temperatures in the genration box can get up to 95° C. Research continues. For best performance, the generator should be located outside the building and the refrigeration compartment located inside to prevent pre-cabinet heating by incident solar radiation.
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