Abstract
Water dispensers are considered essential. So, water dispensers that use vapor-compression urgently need more energy-saving and environmentally friendly alternatives. Stirling water dispensers are a suitable option. However, the waste heat generated via friction between the pistons and their cylinders decreases the cooling load and power consumption. The present work uses the waste heat of both piston friction via water jackets to save energy and improve Stirling water dispenser performance. The result indicates that the heating and cooling loads of the present water dispenser are increased by about 2952 W and 834 W using the waste heat of both pistons at 1200 rpm. The increase of water flow rate within water jackets increases the heating and cooling loads due to the increased absorption of frictional heat. The comparison shows that the current water dispenser reveals an average increase in cooling load of up to 400 percent at low speeds and 61 percent at high speeds, and an increase in heating load of up to 390 percent at low speeds and 28 percent at high speeds.
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