This Engineering News article reports that "The solar water heating system is capable of preheating 30 000 litres of water before it enters the hotel's electrical heating system, which is expected to reduce the electricity usage by about 60%." and "It was estimated that 500 000 kWh/y of electricity would be saved, while some 210 t of carbon-dioxide emissions would be mitigated.
The installation consists of 117 2-kWh flat plate collectors, which use Israeli technology, and are said to be reliable, and easy to maintain."
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