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 ผลงานตีพิมพ์ในวารสารวิชาการImplementation of Adaptive Network-based Fuzzy Inference for Hybrid Ground Source Heat Pumpผู้แต่ง: ศิวกร ชื่นศิริ,  Dr.Kanet Katchasuwanmanee, Lecturer , Dr.Attaporn Wisessint, Assistant Professor, Dr.Apiniti Jotisankasa, Associate Professor , Dr.cheema soralump, Associate Professor , วสุธร สิริยากร, Dr.Peerayot Sanposh, Associate Professor , วารสาร:  
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 หัวเรื่อง:การพัฒนาแบบจำลองทางคณิตศาสตร์สำหรับการอบแห้งผลไม้โดยใช้ปั๊มความร้อน ผู้เขียน:Waraporn Rattanongpisat, Somchart Soponronnarit, Thanit Swasdisevi สื่อสิ่งพิมพ์:pdf AbstractA mathematical model for papaya glace' drying using heat pump has been developed. It comprises of drying rate equation, mass and energy balance equations, thermo-physical property of papaya glace' equations and heat exchanger equations. Successive substitution method was used for finding the solution. It was found that the model was fairly accurate for predicting final moisture content, air temperature at various parts in the system and temperature of refrigerant especially at low moisture level of papaya glace'. The mathematical model was then used to find out strategy for drying papaya glace' with a specific air flow rate of 29.8 kg/h-kg dry papaya glace'. Simulated results showed that drying time and energy consumption was decreased when the drying air temperature was increased. In addition, the appropriate bypass air ratio was in the range of 86-90 %. |
ที่มา:การประชุมวิชาการสมาคมวิศวกรรมเกษตรแห่งประเทศไทยครั้งที่ 11 ประจำปี 2553หัวเรื่อง:การอบแห้งกระเทียมสับโดยใช้อากาศร้อนและปั๊มความร้อนร่วมกับการแผ่รังสีอินฟราเรดไกล |
หัวเรื่อง:การอบแห้งโดยใช้ปั๊มความร้อนในระดับอุตสาหกรรม ผู้เขียน:Thanid Madhiyanon, Somchart Soponronnarit, Thanit Swasdisevi สื่อสิ่งพิมพ์:pdf AbstractThe 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. |
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