Yenphayab, Charatchai
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Preferred name
Yenphayab, Charatchai
Alternative Name
Yenphayab, C.
Main Affiliation
Email
charatchai.ye@kmitl.ac.th
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Item type:Publication, Study the engineering aspect of an advance siphon pump (Pha Ya Rangh Hai Nam) for a small farm irrigation(2019-09-09)This study aims to investigate the performance of the advance siphon pump, which is an indigenous knowledge of free energy pump. It was introduced to investigate the potential of conveying water by using the energy equation of fluid mechanics to explain the mechanism of the prototype. The prototype design followed the information by interviewing the expert of Nernporkin learning center in Kanchanaburi province. The study was divided into 3 procedures; 1) investigating the possibility of prototype for pulling water from reservoir to supply the difference levels area, 2) investigating the effect of the difference of the elevation (ΔH) to the discharge rate from outlet, and 3) investigating the effect of outlet pipe length to the discharge rate. The results conclude that the advance siphon can deliver water only when the higher level of reservoir supplies the lower area (ΔH>0), while the minimum of ΔH for water transportation is 0.05 meter. The experimental results confirm that the important parameters affect directly the discharge rates, which are the outlet pipe diameter, the length of the outlet pipe and ΔH. The discharge rate will increase when increasing the ΔH, the outlet pipe diameter and shorten the length of the outlet pipe. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Develop the Precise Vacuum Seeder for Nursery Plug Tray Sowing by Using the Vacuum Cleaner(2025-01-15); ; The manual sowing of vegetable seeds is the general practice of vegetable nurseries in Thailand. It is the slow and labour-intensive process that causes the low production capacity. This study aims to design and develop a vegetable seed sowing machine for 200-cell plug tray plantings to substitute human labor. The prototype utilizes the vacuum cleaner to develop the suction head pressure that simultaneously offers the 200 seeds-planting per tray. The vacuum seeder mechanism is composed of the suction head unit and seeds tray unit. The prototype is operated and controlled by the automation system for continuous planting. Cantonese vegetable seed is selected to evaluate the planting precision of the prototype. Based on the design parameters obtained in laboratory experiments, the optimal condition for planting the Cantonese vegetable seeds in the 200-cell plug tray is verified by adjusting two parameters - the suction pressures and the nozzle implement type. On the other hand, the planting precision is indicated by the single seed sowing index. The results showed that the average quality of feed index is 70.53% when utilizing the large nozzle implement type with a vacuum pressure of 1019 Pa. The average working cycle time per tray and the machine capacity per hour are 51.0 seconds and 70 trays, respectively. Moreover, the prototype machine costs about 43% of the average cost of the existing commercial seeders in terms of cost-effectiveness.