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Solar driven steam jet ejector chiller

: Pollerberg, C.; Ali, A.H.H.; Dötsch, C.


Applied thermal engineering 29 (2009), No.5-6, pp.1245-1252
ISSN: 1359-4311
Journal Article
Fraunhofer UMSICHT Oberhausen ()
solar energy; solar cooling; Steam Jet Ejector Chiller (SJEC); parabolic trough collector; vacuum collector; cold water generation; Solarenergie; solare Kälte (ABS); Dampfstrahlkältemaschine; Parabolrinnenkollektor; Vakuumkollektor; Kaltwassererzeugung

"This paper presents a solar driven process to generate cold water for air-conditioning by parabolic trough collectors and a steam jet ejector chiller. The only working fluid in the system is water, which is used as refrigerant and working fluid. The operational behaviour of such a system has been investigated by a small test rig. The investigation shows that the cooling water temperature as well as the cold water temperature has a strong influence on the coefficient of performance of a steam jet ejector chiller. The coefficient of performance reaches high values in part load and at good re-cooling conditions, so that the mean efficiency is clearly higher than the nominal efficiency of the system. A first calculation of profitability leads to specific cold cost of 0.62 EUR/kWh in Germany and 0.15 EUR/kWh in Egypt."