A Study of Banana Drying Using Waste Heat from Split Type Air Conditioning System
Keywords:
drying, waste heat, air conditioning systemAbstract
This research involved a technical feasibility study for the drying of bananas using waste heat from a split type air conditioning system. The experimental equipment consisted of a split type air conditioning system with a capacity of 10.55 kW (36,000 BTU/hr), R-22 refrigerant as the working fluid, and a water cooled heat exchanger using a water flow rate of 10 LPM. In this study, a drying oven was made from 1 mm. thick stainless steel board with a width of 0.8 m., a length of 0.6 m., and height of 0.7 m. The drying oven had 5 trays inside with 10 cm spacing between each tray, and an air flow rate passing through the drying oven of 1.10 kg/s. When the bananas were dried using waste heat from the air conditioning system, the initial weight of the bananas was 10 kg and the final weight was 4.35 kg within 62 hours. The result showed that the bananas were dried down to 50% MCdb (moisture content dry basis) when the heat exchanged the water flowing out from the condenser to the heat exchanger device, with an average water temperature of 48.35oC and an average temperature inside the oven of 46.23oC.
References
Juengjaroennirachon, S. (2007). Performance Analysis of Drying System using Waste Heat Recovery from Air Conditioning System. Bangkok: Master Thesis, King Mongkut’s University of Technology Thonburi. (in Thai)
Juengjaroennirachon, S. and Suparos, T. (2017). A Study of Waste Heat Energy using from Air Conditioning System for Drying of Agricultural Products. National Conference of Sri-Ayutthaya Rajabhat University Group 2017. December
19-20, 2017, 540-549. Chanthaburi, Thailand. (in Thai)
Juengjaroennirachon, S., Hoonpong, p., Chingtuaythong, W. and Suparos, T. (2016).
A Study of Drying of Agricultural Products using Waste Heat Recovery from Air Conditioning System. Industrial Engineering Network Conference 2016. July 7-8, 2016, 2046-2052. Khon Kaen, Thailand. (in Thai)
Kumwan, R., Thiangchanta, S., and Kesai, S. (2018). Determination of Drying Rate of Jackfruit by Infrared Dryer, Vacuum System. Industrial Technology Lampang Rajabhat University Journal, Vol.11(2), 67-77. (in Thai)
Sansiribhan, S. (2003). Development of Dryer Using Combined Condenser Heat Waste and Solar Energy. Bangkok: Master Thesis, King Mongkut’s University of Technology Thonburi. (in Thai)
Satmaroeng, S. and Suntivarakorn, P. (2007). Characteristic of Clothes Drying Using Waste Heat from Split-type Air Conditioner. The 22nd Conference of Mechanical Engineering. October 17, 2007, 126-131. Bangkok, Thailand. (in Thai)
Suksuntornsiri, P., Jantan, T., Chotiwong, T. and Charoenwatewut, S. (2006). Small Air Conditioner’s Waste Heat Recovery for Household Warm Water System. The 21st Conference of Mechanical Engineering. October 17-19, 2006,
355-360. Chonburi, Thailand. (in Thai)
Soponronnarit, S. (1997). Drying of seeds and foods. 7th Bangkok: King Mongkut’s Institute of Technology Thonburi. (in Thai)
Stoecker, W. F. and Jones, J. W. (1982). Refrigeration & Air Conditioning. 2nd International edition. Singapore: McGraw-Hill.
Roonprasang, N. (2004). Drying of Banana Using Solar Dryer Combined with Parabolic Trough and Phase Change Energy Storage System. Bangkok: Master Thesis, King Mongkut’s University of Technology Thonburi.
(in Thai)
Yoovidhya, T. (2015). Thermal Sterilization of Foods. Bangkok: King Mongkut’s University of Technology Thonburi. (in Thai)
Youmune, P., Krueganta, N., and Umnajkitikorn, P. (2012). Construction of a coffee bean solar dryer for use by agriculturists in Ban Mai Pattana, Muang-pan district, Lampang. Industrial Technology Lampang Rajabhat University Journal, Vol.5(1), 35-48. (in Thai)
