Abstract
Solar energy as an inexhaustible supply of green energy, being receiving more and more attention, but in hotels and other large-scale hot water systems, due to collector device installation location, water temperature instability and inability to realize all-weather heating water supply, has been not widely used. In this paper, taking the water heating system reforming of gas boiler in the Gulf Hotel Yantai Regency for example, the set of control system built by PLC and inverter ,has realized large-scale solar energy and gas hot water boiler systems in the perfect combination of weather, temperature, hot water unmanned operation, with advantages of lower installation, low-temperature protection, and manual switching, remote control and obvious energy saving effect .The paper provids a new approach for the popularization of large–scale solar energy water heating system.
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