An Experimental Study on Clothes Drying Using Waste Heat from Split Type Air Conditioner

This paper was to study the clothes dryer using waste heat from a split type air conditioner with a capacity of 12,648 btu/h. The drying chamber had a minimum cross section area with the size of 0.5 x 1.0 m2. The chamber was constructed by sailcloth and was inside folded with aluminium foil. Then, it was connected to the condensing unit of an air conditioner. The experiment was carried out in two aspects which were the clothes drying with and without auxiliary fan unit. The results showed that the drying rate of clothes in the chamber installed with and without auxiliary fan unit were 2.26 and 1.1 kg/h, respectively. In case of the chamber installed with a auxiliary fan unit, the additional power of 0.011 kWh was consumed and the drying rate was higher than that of clothes drying without auxiliary fan unit. Without auxiliary fan unit installation, no energy was required but there was a portion of hot air leaks away through the punctured holes at the wall of the drying chamber, hence the drying rate was dropped below. The drying rate of clothes drying using waste heat was higher than natural indoor drying and commercial dryer which their drying rate were 0.17 and 1.9 kg/h, respectively. It was noted that the COP of the air conditioner did not change during the operating of clothes drying.

Authors:

• P. Suntivarakorn
• S. Satmarong
• C. Benjapiyaporn
• S. Theerakulpisut

Keywords:

• Drying Rate
• Clothes Dryer
• COP
• Air Conditioner.

References:

[1] S. Deng and H. Han, "An experimental study on clothes drying using
rejected heat (CDURH) with split-type residential air conditioners"
Applied Thermal Engineering vol. 24, 2004, pp. 2789-2800.
[2] A. Ameen and S. Bari, "Investigation into the effectiveness of heat pump
assisted clothes dryer for humid tropics" Energy Conversion and
Management vol. 45, 2004, pp. 1397-1405.
[3] A. B. Ng and S. Deng, "A new termination control method for a clothes
drying process in a clothes dryer" Applied Energy vol. 85, 2008, pp.
818-829.
[4] V. Yadav and C. G. Moon, "Modelling and experimentation for the
fabric-drying process in domestic dryers" Applied Energy vol. 85, 2008,
pp. 80-95.
[5] J. Deans, "The modeling of a domestic tumbler dryer" Applied Thermal
Engineering vol. 21, 2001, pp. 977-900.
[6] Y. A. Cengel and M. A. Boles, Thermodynamics: An engineering
approach, 4th edition, McGraw-Hill, New York, 2002, 930 pages.