부산대학교 도서관

Water dispensers are currently one of the essential home items. The international marketplace for water dispensers uses a vapour compression refrigeration cycle, which spends a large amount of energy and uses environmentally harmful refrigerants. In the present work, a numerical and experimental investigation for obtaining hot and cold drinking water using the Stirling cycle is characterized by saving energy, being environment-friendly, rapidly reaching the required cooling or heating loads, and having the highest possible performance. The present work uses a tubular heat exchanger as both a cold and a hot heat exchanger. According to Schmidt's analysis, the optimal water dispenser dimensions is calculated and experimentally confirmed for higher cooling/heating loads. The experimental and numerical results concluded that the machine speed increases the cooling/ heating load at various charged pressure. Also, the increase in the charged mass improves the cooling/heating load. The water dispenser can produce about 3 kW of cooling load and about 7 kW of heating load at 4 bars of charged pressure and 1200 rpm.