 หัวเรื่อง:การออกแบบและทดสอบการอบแห้งข้าวเปลือกในถังเก็บ ผู้เขียน: Somkiat Prachayawarakorn, Somchart Soponronnarit, Prasai Chalidapongs, Adisak Nathakaranakule สื่อสิ่งพิมพ์:pdf AbstractThe objective of this paper was to design and test of in-store pady drying. Both energy consumption and grain quality were taken into consideration. Economic analysis was also conducted. Experimental results indicated that uniform air flow through paddy bed was achieved. Pressure drop through the grain bed was the most significant. When paddy was dried from 16% to about 14% wet-basis, using an air flow rate of 2.03 m3/min-m3 of paddy, energy consumption was 19 bath/ton, head yield was 11% higher conpared with direct sun drying. Benefit gained from higher head yield was 160 baht/ton. Dry paddy in storage should be ventilated periodically by ambient air, at least one hour each time. Mathematical simulation of paddy drying indicated that energy consumption was 35 baht/ton when paddy was dried from 18% to 14% wet-basis, using an air flow rate of 1.3 m3/min-m3 of paddy. Economic analysis based on mathematical model data showed that in-store drying system yielded higher rate of return compared with interest rate and short pay back period. |
หัวเรื่อง:การชะลอความเสียหายของกองข้าวเปลือกชื้นโดยการระบายอากาศ ผู้เขียน:Athaporn Apivathananukul, Somchart Soponronnarit, Tipaporn Ouvithaya, Adisak Nathakaranakule สื่อสิ่งพิมพ์:pdf AbstractThe delay of deterioration of wet paddy by ventilation with cool air (15+8?C) and ambient air (30?8?C) was determined. Ventilation was applied in two forms, continuously and intermittently. The initial moisture content of paddy was 21.0, 22.2 and 26.0% wet-basis. Air flow rate used was 0.35 m3/min-m3 of paddy. Paddy could be cooled down to 20?C and to near ambient air temperature within one day by cool air and ambient air ventilation, respectively. The quality of paddy could be maintained at an acceptable level more than one month, either by cool air ventilation or ambient air ventilation. The quality of paddy in terms of whiteness was better for paddy ventilated with cool air. |
หัวเรื่อง:การหาคุณสมบัติทางฟิสิกส์ของเมล็ดมะม่วงหิมพานต์ ผู้เขียน:Adisak Nathakaranakule, Somkiat Prachayawarakorn สื่อสิ่งพิมพ์:pdf AbstractPhysical properties of kernel and whole shell of cashew nuts; specific heat, density, equilibrium moisture content and thin layer drying equation, were determined. The specific heat and density of both types of cashew nut depend linearly on their moisture content. For the experiments of equilibrium moisture content, the static method was used in the range of 50?C , 62?C and 74?C and relative humidity in the range of 10.96 - 88.46 percent. For the kernel, equilibrium moisture content models based on the equations of Henderson and Modified Henderson were accurate to predict the equilibrium moisture content. While the equilibrium moisture content models based on Henderson and Chung and Pfost equations were suitable for the whole shell. The experiments of the thin-layer drying were performed at the temperature of 60?C, 80?C and 100? C, the air velocity of 2.5 and 3 m/s, and the initial moisture content between 17 - 25 %db. The results showed that the effect of initial moisture content and air velocity were negligible, but the effect of temperature was significant. By considering the shape of cashew nut to be cylindrical, the semi-empirical relation was developed by crossing the equation for infinite cylinder and infinite slab. Then it was found that the thin layer drying equation and the effective diffusivity equation were in the exponential form. |
หัวเรื่อง:การวิเคราะห์ขนาดเครื่องทำอากาศร้อนพลังงานแสงอาทิตย์ที่ใช้ในการอบแห้ง ผู้เขียน: ดร.สุดสายสิน แก้วเรือง, รองศาสตราจารย์ , ดร.บัญญัติ เศรษฐฐิติ, รองศาสตราจารย์ , Adisak Nathakaranakule สื่อสิ่งพิมพ์:pdf AbstractSolar air heater with one glass cover was tested with solar simulator at the radiation values of 650-700 W/m2. The test followed the standard of The American Society to Heating, Refrigerating, and Air-Conditioning Engineers, Inc. (ANSI/ASHRAE 93-1986). Air mass flow rate per unit collector area (G) at the values of 100, 150, 300, and 350 kg/h-m2 approximately and geometric coefficient of the collector (K) at the values of 100, 250, 600, and 800 approximately were varied in the test. Results are described that the efficiency of solar air heater was increased with the increasing of G and K obviously and had increasing linear relationship with the product of G and K. |
หัวเรื่อง:การป้องกันการเกิดแอฟลาทอกซินในข้าวโพดโดยการอบแห้งในฉางเก็บ ผู้เขียน:Somkiat Prachayawarakorn, Somchart Soponronnarit, Adisak Nathakaranakule, Sittichai Inchan สื่อสิ่งพิมพ์:pdf AbstractThe objective of this research was to investigate the prevention of aflatoxin production and energy consumption in the prototype system of in-store corn drying. The air was ventilated periodically through the corn bulk. The experimental results showed that the uniform air ventilated through the corn bulk was accomplished. For corn drying using ambient air, the amount of aflatoxin B-1 production at the end of drying in case of 23.4% wet-basis initial moisture content of corn was higher than that in case of 18.7% and 18.9% wet-basis initial moisture content of corn. To preserve the quality of corn by controlling the amount of alflatoxin, the initial moisture content of corn should not be higher than 19% wet-basis but if initial moisture content of corn was higher than 19% wet-basis, it should be dried to 18-19% wet basis within 2 days and continually dried to 14% wet-basis within 14 days. When corn was dried from 19% to 12% - 13% wet- basis by using ambient air with specific air flow rate of 3.6-4.6 m3/min-m3 of corn, energy consumption was 0.46-0.9 MJ/kg water evaporate and electricity cast was 16-27 baht/ton of corn. |
หัวเรื่อง:การรักษาคุณภาพข้าวเปลือกโดยการระบายอากาศเป็นระยะๆ ผู้เขียน:Somkiat Prachayawarakorn, Somchart Soponronnarit, Adisak Nathakaranakule, Sittichai Inchan สื่อสิ่งพิมพ์:pdf AbstractThe effect of different storage conditions to paddy quality was observed Chacherngsao Agricultural Cooperative. The ambient air flow rate of 1.6 m3/min-m3 was ventilated through the paddy bulk every month, once a month for 2 hours. The results indicated that the ventilation decreased the temperature in paddy bulk. The quality of paddy stored with intermittent ventilation was better in terms of whiteness but was approximately the same in terms of head yield compared to paddy stored without ventilation. |
หัวเรื่อง:ปัจจัยที่ส่งผลต่อการอบแห้งมะละกอแช่อิ่มในอุโมงค์ ผู้เขียน:Piyarat Noosuk, Somchart Soponronnarit, Tipaporn Yoovidhya, Adisak Nathakaranakule สื่อสิ่งพิมพ์:pdf AbstractThe strategies for papaya glace’ drying in tunnel were investigated. This experiment was performed at the fourth Royal Project Food Processing Section. The optimum conditions of drying, corresponding mathematical models were also evaluate. The criteria set for this stusy included low drying time, low specific enegy consumption and acceptable qualities of papaya glace’. The drying rate obtained from the model of batch tunnel dryer were close to the experimental ones. From the mathematical models, it was found that the optimum conditions of the first step of dyring for the dimension of papaya glace’ of 3.1x7.8x1.4 cm3 and drying temperature of 70oC were specific air flow of 12 kg/h-kg dry papaya glace’ and air recycled of about 70%. In the second step of drying for the dimension of papaya glace’ of 0.98x0.98x0.98 cm3 and drying temperature of 55 oC, it was found that the optimum drying conditions were specific air flow rate of 10 kg/h-kg dry papaya glace’ and air recycled of about 80%. |
หัวเรื่อง:การอบแห้งเมล็ดในมะม่วงหิมพานต์ด้วยเครื่องอบแห้งแบบถาดหมุน ผู้เขียน:Thanit Swasdisevi, Somchart Soponronnarit, Adisak Nathakaranakule, Pieamsin Thongthip สื่อสิ่งพิมพ์:pdf AbstractThe objective of this research is to investigate a suitable condition for drying cashew kernel with rotating tray dryer. Criterion used to consider are as follows: quality of product after drying, drying time and specific energy consumption. Experimental results showed that the drying time decreased when drying air temperature increased. The appropriate drying condition is at drying air temperature of 90?C, recycled air fraction of 0.45 and specific air flow rate of 70 kg dry air/h-kg dry cashew kernel (air velocity 0.07 m/s). The product quality after drying is acceptable while drying time is low. The specific energy consumption is 68.22 MJ/kg water evap. or 6.85 MJ/kg cashew kernel. Drying cost analysis is reported at 260 baht/kg water evap. or 26.13 bath/kg cashew kernel. |