https://scholars.lib.ntu.edu.tw/handle/123456789/573134
標題: | A study on performance evaluation of tea dryers | 作者: | Chang C.-H Tsai C.-Y Ong P SUMING CHEN |
關鍵字: | Cost benefit analysis; Cost effectiveness; Drying; Energy conservation; Energy utilization; Investments; Machinery; Quality control; Tea; Data normalization; Drying efficiency; Energy-saving and environments; Essential equipments; Evaluation results; Investment costs; ITS applications; Total efficiency; Dryers (equipment) | 公開日期: | 2021 | 卷: | 37 | 期: | 2 | 起(迄)頁: | 299-307 | 來源出版物: | Applied Engineering in Agriculture | 摘要: | Tea dryers are essential equipment for tea manufacturers whereby, the hot-air tea drying machines, such as multiple-layer conveyor dryer (MLD), electric hot-air dryer (HAD), and low-humidity dryer (LHD), are commonly used. The vacuum drum dryer (VDD), a new type of tea dryer, has the potential to improve the drying quality and efficiency. Hence, it is necessary to assess its performance in comparison with the other three dryers to facilitate its application in the tea industry. This study used data normalization, radar chart, and weighting difference analysis to compare the performance of these four dryers in terms of drying efficiency, energy, costs, qualities, and total efficiency. The evaluation results indicated that the investment cost of the HAD was the lowest among all, followed by LHD and MLD, while the VDD was the highest. In terms of the drying quality, the opposite trend was observed in which the VDD gave the best performance, and followed by LHD, MLD, and HAD. For the rating of total efficiency, HAD outperformed VDD and LHD, where the lowest total efficiency was attained by the MLD. Considering the equal weighting of cost and quality, it can be concluded that HAD showed the best performance while MLD was the worst. Different requirements for cost and qualities affect the final evaluation of tea dryers. The electro-thermal dryers were more energy-saving and environment friendly than the fuel dryer. The VDD has better performance in terms of drying rate and qualities. Despite its energy consumption and equipment costs are higher, it still has the potential for useful application in high-quality tea drying. The continuous effort of researchers and dryer manufacturers in reducing the input costs and enhancing the benefits can improve the energy consumption and machinery cost of VDD. ? 2021 American Society of Agricultural and Biological Engineers |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85105445853&doi=10.13031%2fAEA.14240&partnerID=40&md5=e4f7d05fc77b4d290b27ab34fcc17c11 https://scholars.lib.ntu.edu.tw/handle/123456789/573134 |
ISSN: | 8838542 | DOI: | 10.13031/AEA.14240 | SDG/關鍵字: | Cost benefit analysis; Cost effectiveness; Drying; Energy conservation; Energy utilization; Investments; Machinery; Quality control; Tea; Data normalization; Drying efficiency; Energy-saving and environments; Essential equipments; Evaluation results; Investment costs; ITS applications; Total efficiency; Dryers (equipment) |
顯示於: | 生物機電工程學系 |
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