Search Result of "Somchart Soponronnarit"

About 35 results
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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:แนวทางการอบแห้งสับปะรดแช่อิ่มที่เหมาะสมที่สุด

ผู้เขียน:ImgMarina Nuimeem, ImgSomchart Soponronnarit, ImgBoosya Bunnag

สื่อสิ่งพิมพ์:pdf

Abstract

A mathematical model for pineapple glace' drying based on thermal equilibrium between the drying air and the product was developed. The effect of temperature on product quality was observed. The effect of temperature, air flow rate and traction of air recycled on drying time and energy consumption were also observed. The criteria for optimum drying of pineapple glace' in a cabinet dryer were product quality, drying time and energy consumption. Experimental and simulated results showed that a drying temperature of 65?C, a specific air flow rate of about 11 kg dry air/h-kg dry pineapple glace' and about 0.75 of air recycled should be used.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 027, Issue 1, Jan 93 - Mar 93, Page 79 - 90 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Mathematical Simulation of Longan Fruit Drying)

ผู้เขียน:ImgAree Achariyaviriya, ImgSomchart Soponronnarit, ImgJirawan Tiansuwan

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Abstract

The objectives of this study were to develop a mathematical model and to simulate longan drying for evaluating the optimum conditions. The specific energy consumption and average drying rate were used for the verification of the model. It was found that the simulated results agreed with some of those experiments. The effects on the specific energy consumption of drying air temperature, fraction of air recycled, and specific air flow rate were described. It was found that the specific air flow rate, drying air temperature and fraction of air recycled affect significantly on specific energy consumption. However, the effects of specific air flow rate and drying air temperature on specific energy consumption were small when fraction of air recycled was big. Additionally, it was also concluded that the optimum specific energy consumption of 3.3 MJ/kg-water occurred at fraction of air recycled of 95%, specific air flow rate of 28 kg-dry air/h-kg dry longans, drying air temperature of 75?C and drying time of 33 h.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 034, Issue 2, Apr 00 - Jun 00, Page 300 - 307 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Continuous Drying of Paddy in Two-Dimensional Spouted Bed)

ผู้เขียน:ImgThanid Madhiyanon, ImgSomchart Soponronnarit, ImgWarunee Tia

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Abstract

An industrial–scale prototype of spouted bed paddy dryer with a capacity of 3,000 kg/h was constructed and tested. The prototype was shown to be a desirable feature of spouted bed as well as capability of continuous drying and offering consistent results through the testing period. Experimental results showed that the prototype performed well on moisture reduction and milling quality. Head rice yield and whiteness were not significantly changed regardless of using inlet air temperature up to 146?C. At present, feed rate is limited to not exceed 1,000 kg/h and thermal energy consumption is relatively high, i.e. in range of 5.9-8.6 MJ/kg water evaporated. This could be attributed to using of improper blower. The relative results of increasing air velocity and pressure should be studied.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 034, Issue 2, Apr 00 - Jun 00, Page 308 - 314 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ปัจจัยที่ส่งผลต่อการอบแห้งมะละกอแช่อิ่มในอุโมงค์

ผู้เขียน:ImgPiyarat Noosuk, ImgSomchart Soponronnarit, ImgTipaporn Yoovidhya, ImgAdisak Nathakaranakule

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Abstract

The 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%.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 030, Issue 1, Jan 96 - Mar 96, Page 74 - 90 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effect of Temperature on Soybean Quality Using Spouted Bed Technique)

ผู้เขียน:ImgSongchai Wiriyaumpaiwong, ImgSomchart Soponronnarit, ImgSomkiat Prachayawarakorn

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Abstract

The effect of temperature on moisture reduction rate and soybean qualities using a two-dimensional spouted bed dryer has been studied. Air velocity was varied in a range of 15.86-20.50 m/s, with a fixed holdup of 25 kgs. The soybeans with initial moisture levels varying between 28 and 32% dry basis were dried to 12-17% dry basis using inlet air temperatures of 120-150?C. The experimental results indicate that higher temperatures provide faster moisture reduction rate. The qualities of soybean have also been considered in terms of stress cracking, breakage, urease activity and protein solubility in 0.2% KOH. It is shown that the percentages of cracking and breakage depend on temperature, final moisture content and degree of collision of kernel with deflector. The percentages of stress crack and breakage lie in the range of 50-60% and of 3-24%, respectively. The urease activity and protein solubility are accepted with slightly changing in the protein quality.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 035, Issue 4, Oct 01 - Dec 01, Page 460 - 466 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:แนวทางการอบแห้งต้นหอมสับ

ผู้เขียน:ImgManit Sukjindasatean, ImgSomchart Soponronnarit, ImgSomkiat Prachayawarakorn

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Abstract

The object of this paper was to investigate strategies for drying spring onion by considering both experimental and simulated results. Product quality, drying capacity and energy consumption were taken into consideration. It was concluded that drying should be devided into 3 stages. In the 1st stage, drying air temperature was 80?C, specific air flow rate was 33.9 m3/min.kg dry matter and drying time was 0.5 h. In the 2nd stage, drying air temperature and drying time were kept unchanged but specific air flow rate was decreased to 13.5 m3/min.kg dry matter. In the final stage, drying air temperature was decreased to 72?C, specific air flow rate was also decreased to 6.8 m3/min.kg dry matter. Following these three stages, specific primary energy consumption was 6.17 MJ/kg H2O evap., drying time was 2.65 h and product quality was maintained.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 028, Issue 4, Oct 94 - Dec 94, Page 602 - 607 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การอบแห้งข้าวเปลือกโดยเทคนิคฟลูอิไดเซชัน เพื่อการเพิ่มปริมาณข้าวเต็มเมล็ด

ผู้เขียน:ImgAdithap Taweerattanapanish, ImgSomchart Soponronnarit, ImgSomboon Wetchacama, ImgNgamchuen Kongseree, Imgสุนันทา วงศ์ปิยชน

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Abstract

Experimental result of fluidized bed paddy drying by high air temperature (140 and 150?C) at various initial and final moisture contents showed that head rice yield could be increased to a maximum value at the range of final moisture content of paddy of 19-22 % wet-basis. The factors affecting the increase of head rice yield were the initial and final moisture content of paddy and the tempering process.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 033, Issue 1, Jan 99 - Mar 99, Page 134 - 145 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ระบบอบแห้งข้าวเปลือกในโรงสีข้าว

ผู้เขียน:ImgWathanyoo Rordprapat, ImgSomchart Soponronnarit, ImgMontri Wangji

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Abstract

Appropriate paddy drying systems in large rice mills was investigated to reduce paddy moisture content from 20 %wet-basis to 14 %wet-basis. Rice after milling was also in good quality. In this study, the performance of paddy drying systems in three rice mills with the same types of dryers but different installation and drying operation were investigated. Paddy quality and energy consumption of each dryer in each system were studied. The results obtained were used to find appropriate paddy drying condition and then to design high efficient paddy drying system.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 033, Issue 1, Jan 99 - Mar 99, Page 126 - 133 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Study of Parameters Affecting Drying Kinetics and Quality of Corns)

ผู้เขียน:ImgSomboon Wetchacama, ImgSomchart Soponronnarit, ImgSomkiat Prachayawarakorn, ImgAdisak Pongpullponsak, ImgWuttitat Tuntiwetsa, ImgSuprarat Kositcharoeankul

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Abstract

The objectives of this research are to investigate factors affecting on drying rate of high moisture corn at high temperature with fluidisation technique and to develop a mathematical model for predicting drying rate. There were three following steps of drying process: 1) rapid drying using fluidised bed dryer at inlet drying air temperature of 130-170?C, 2) corn tempered for period of 40-180 minutes under the same temperature as drying from the step 1 and 3) drying with ambient air. Drying kinetic shows the inlet air temperature and the specific airflow rate significantly affecting the drying rate. Amongst three semiempirical drying equations (Wang and Singh, Page and Lewis), Page’s equation provides the best prediction. This study also aims to study the quality of corn dried in each step. Corn qualities in terms of aflatoxin content, percentages of breakage and stress crack, and colour change have been considered. Experimental results show that aflatoxin content in dried corn does not change. Breakage and cracking depend strongly on final moisture content and are relatively dependent to temperature. Tempering provides the improvement of colour while inlet air temperature has no effect.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 035, Issue 2, Apr 01 - Jun 01, Page 195 - 204 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การทดสอบการอบแห้งข้าวเปลือกแบบในถังเก็บและแบบเป็นงวด : ความสิ้นเปลืองพลังงาน

ผู้เขียน:ImgSomchart Soponronnarit, ImgSomchai Chimsakolthanakorn

สื่อสิ่งพิมพ์:pdf

Abstract

The objective of this paper was to study the energy consumption patterns in drying paddy under various drying air conditions and drying strategies. It was found from the experiment that ambient air drying with low air flow rate consumed final energy about one half of that drying with high air flow rate. However, they were about the same when primary energy was considered except the ambient air drying with high air flow rate which consumed primary energy much greater than the others. Ambient air low flow rate should be used in slow drying. Ventilation at particular times when relative humidity of drying air was not too high or continuous ventilation with controlled relative humidity should be practiced. If fast drying was required, warm air with high flow rate should be used.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 024, Issue 1, Jan 90 - Mar 90, Page 92 - 101 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การศึกษาพารามิเตอร์สำหรับวิเคราะห์การอบแห้งมะละกอแช่อิ่ม

ผู้เขียน:ImgSiva Achariyaviriya, ImgSomchart Soponronnarit

สื่อสิ่งพิมพ์:pdf

Abstract

The paper describes the studies of parameters for the analysis of papaya glace drying by conduction experiments and finding out appropriate equations to describe these parameters. From the study of drying rate, it was found that diffusion equation could explain the drying rate and that the diffusion coefficient increased exponentially with drying temperature. From the study of equilibrium moisture content by using saturated salt solution, it was found that when temperature increased, the equilibrium moisture content decreased if relative humidity was lower than 25% but increased, if relative humidity was higher than 45%. The equation of Brunauer was found appropriated in describing the experimental results. Finally, it was found that density and specific heat increased linearly with moisture content.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 024, Issue 2, Apr 90 - Jun 90, Page 196 - 207 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การออกแบบและทดสอบการอบแห้งข้าวเปลือกในถังเก็บ

ผู้เขียน:ImgSomkiat Prachayawarakorn, ImgSomchart Soponronnarit, ImgPrasai Chalidapongs, ImgAdisak Nathakaranakule

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Abstract

The 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.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 028, Issue 3, Jul 94 - Sep 94, Page 451 - 462 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การทดสอบการอบแห้งข้าวเปลือกแบบในถังเก็บและแบบเป็นงวด : คุณภาพผลิตภัณฑ์

ผู้เขียน:ImgSomchart Soponronnarit, ImgPetchara Preechakul

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Abstract

This paper described the experiments on in Store and batch drying of paddy under tropical climate like Bangkok. It was found that in-store drying was technically feasible and the quality of paddy after drying was very good. Its quality was also attractive when it was dried in batch providing that drying air temperature was appropriate.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 024, Issue 3, Jul 90 - Sep 90, Page 367 - 377 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การอบแห้งโดยใช้ปั๊มความร้อนในระดับอุตสาหกรรม

ผู้เขียน:ImgThanid Madhiyanon, ImgSomchart Soponronnarit, ImgThanit Swasdisevi

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Abstract

The prototype of an industrial-scale heat pump dryer (HPD) was designed, constructed and evaluated for performance. Drying chamber contained four trolleys with product capacity of 600-700 kg. In the experiments, papaya glace' was dried in closed system at an average temperature of 55?C, specific air flow rates of 25-32 kg dry air / h - kg dry papaya glace' and the evaporator by-pass air of 81%. The papaya glace' with initial moisture content of 83-86% dry basis was dried to final moisture content of 12-14% dry basis within approximately 32 hours. No significant variation of the average final moisture gradient along horizontal and vertical of dryer was observed (due to uniform air distribution within drying chamber). The results of experiment indicated that drying rate decreased rapidly with time, while total power consumption remained nearly constant. At high initial moisture content, the rate of moisture removal was higher than that of low initial moisture content. (The maximum average drying rate and SMER were 9.34 kg water evap/h and 0.782 kg water evap/kWh, respectively. The maximum average MER is 9.21 kg water cond/h, and the relative lowest average specific energy consumption is 4.92 MJ/kg water evap. The (COPhp)sys varied from 4.2 to 4.9 which was higher than (COPhp)used obtained by the internal condenser load which varied from 3.3 to 3.8. This attributed to the excess heat rejected to atmosphere through the external condenser.) The quality of dried papaya glace' in terms of color was acceptable due to low drying temperature. In conclusion, HPD achieved high energy efficiency, and it was feasible to be commercialized, particularly in food drying industry.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 033, Issue 3, Jul 99 - Sep 99, Page 461 - 473 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การศึกษาพารามิเตอร์สำหรับวิเคราะห์การอบแห้งสับปะรดแช่อิ่ม

ผู้เขียน:ImgAree Teanchai, ImgSomchart Soponronnarit

สื่อสิ่งพิมพ์:pdf

Abstract

The objectives of this study are to determine experimentally some properties of pineapple glace such as equilibrium moisture content, moisture diffusion coefficient, density and specific heat. These parameters are useful and necessary for drying analysis. The equations describing these parameters were found out by curve fitting using least square technique. The equilibrium moisture content was determined by static method using saturated salt solution. It was found that equilibrium moisture content decreased with the temperature for relative humidity range from 0-35 percent, but increased with the temperature for relative humidity higher than 45 percent. The equation of Iglesias & Chirife, 1978 was found to be accurate to describe the experimental results. The results of the drying of pineapple glace showed that moisture diffusion coefficient increased exponentially with drying temperature and the effect of air velocity was not significant. The temperature range from 55-65oC was suitable for drying pineapple glace regarding to good quality. For other parameters such as density and specific heat, it was found that the density increased linearly with moisture content in dry basis and specific heat increased linearly with moisture content in wet basis.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 025, Issue 2, Apr 91 - Jun 91, Page 206 - 218 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การศึกษาเปรียบเทียบแบบจำลองทางคณิตศาสตร์ของการอบแห้งข้าวโพด

ผู้เขียน:ImgAdisak Nothakoranakule, ImgSomchart Soponronnarit

สื่อสิ่งพิมพ์:pdf

Abstract

The comparison among the results obtained from two corn drying mathematical models: non-equilibrium model and near-equilibrium model and the one obtained from the experiments was studied. The experiments comprised three strategies: 1) Low air flow rate, high temperature, LFHT (5.5-26.0 m3/min-m3 of corn, 60-90oC) 2) Low air flow rate, low temperature, LFLT (5.5-26.0 m3/min-m3 of corn, 45-55oC) 3) High air flow rate, Low temperature, HFLT (30.0-45.0 m3/min-m3 of corn, 45-55oC). Results are described. The simulated moisture contents obtained from the non-equilibrium model were close to those of experiments in case of LFLT but they were not agreeable very well in cases of LFHT and HFLT. The simulated moisture contents obtained from the near-equilibrium model were a little bit lower than those obtained from the non-equilibrium model in cases of LFHT and LFLT and were nearly the same in case of HFLT. The temperatures calculated from both models were nearly the same but were higher than those of experiments for all drying strategies. The near equilibrium model was more interest to use than the non-equilibrium model because of small difference of results and much less computer time spending about 5 times.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 025, Issue 3, Jul 91 - Sep 91, Page 345 - 357 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ผลของอุณภูมิและความชื้อสัมพันธ์ที่มีต่ออัตราการเหลืองของข้าวเปลือกชื้น

ผู้เขียน:ImgNirachara Srisubati, ImgSomchart Soponronnarit, ImgTipaporn Yoovidhya

สื่อสิ่งพิมพ์:pdf

Abstract

The effects of temperature and relative humidity in storage chambers on yellowing rate of paddy were investigated and then an empirical equation for predicting the yellowing rate was developed. Paddy was conditioned using saturated salt solutions at relative humidities from 80 to 95 % and temperatures 35, 45, 55, 60, and 65?C. The yellowing rate was found to follow the zero order kinetics. The yellowing constant values (k) increased exponentially with temperature while increased linearly with water activity. The magnitude of activation energy varied from 130-145 kJ/mol. A predictive equation for determining yellowing rate was ln k = ? - ?aw - ?/T + (?aw)/T where aw is water activity (valid from 0.80 to 0.95), T is absolute temperature (valid from 308 to 338 K) and ?, ?, ? and ? are constants. The results of variance analysis showed that temperature, water activity and their interaction significantly influenced the yellowing rate of paddy.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 032, Issue 3, Jul 98 - Sep 98, Page 309 - 318 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การชะลอความเสียหายของกองข้าวเปลือกชื้นโดยการระบายอากาศ

ผู้เขียน:ImgAthaporn Apivathananukul, ImgSomchart Soponronnarit, ImgTipaporn Ouvithaya, ImgAdisak Nathakaranakule

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Abstract

The 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.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 030, Issue 3, Jul 96 - Sep 96, Page 351 - 363 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Development of a Commercial Scale Vibro-Fluidized Bed Paddy Dryer)

ผู้เขียน:ImgSomboon Wetchacama, ImgSomchart Soponronnarit, ImgWuttikon Jariyatontivait

สื่อสิ่งพิมพ์:pdf

Abstract

The objectives of this research were to design, construct and test a prototype of vibro-fluidized bed paddy dryer with a capacity of 2.5–5.0 tons/h. Experimental drying conditions were: air flow rate 1.7 m3/s (1.9 kg/s), bed velocity 1.4 m/s, average drying air temperature 125–140?C, residence time of paddy approximately 1 minute, bed height 11.5 cm, fraction of air recycled 0.85 (1.6 kg/s) and vibration of intensity 1 (frequency 7.3 Hz and amplitude 5 mm.). It was found that moisture content of paddy was reduced from 28 to 23 % d.b. at a feed rate of 4821 kg/h. Electrical power consumption and average diesel oil consumption were 9646 W and 17.6 1/h, respectively. Specific primary energy consumption was 6.15 MJ/kg-water evap. Electrical power of blower motor and vibrator motor was 55 % as compared to electrical power of blower motor used in fluidized bed drying without vibration. For operation of 12 hours/day and 90 days/year, paddy drying cost was 1.50 baht/kg-water evap. (fixed cost 0.50 baht/kg-water evap. and operating cost 1.00 baht/kg-water evap., US$ 1 = 40 baht).

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 034, Issue 3, Jul 00 - Sep 00, Page 423 - 430 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การอบแห้งเมล็ดในมะม่วงหิมพานต์ด้วยเครื่องอบแห้งแบบถาดหมุน

ผู้เขียน:ImgThanit Swasdisevi, ImgSomchart Soponronnarit, ImgAdisak Nathakaranakule, ImgPieamsin Thongthip

สื่อสิ่งพิมพ์:pdf

Abstract

The 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.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 033, Issue 1, Jan 99 - Mar 99, Page 159 - 169 |  PDF |  Page 

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