JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Energy Performance Analysis of Electric Heater and Heat Pump Food Dryers
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Energy Performance Analysis of Electric Heater and Heat Pump Food Dryers
Yu, Young Woo; Kim, Young Il; Park, Seungtae;
  PDF(new window)
 Abstract
In this study, energy performance of two types of food dryers which are electric heater and heat pump is studied experimentally. With drying chamber temperatures controlled at 45, 50 and , sliced radish is dried from an initial mass of 90 to final 7 kg. Moisture content, drying time, total power consumption, MER (moisture extraction rate, kg/h) and SMER (specific moisture extraction rate, kg/kWh) are measured and analyzed. As the drying chamber temperature is increased, drying time is shortened but energy efficiency is reduced for both types. For an electric heater dryer, the effect of chamber temperature on drying time is significant but less significant on energy efficiency. For a heat pump dryer, the dependence of chamber temperature on drying time is weak but strong on energy efficiency. Temperature levels have little effect on electric heater dryer performance but strong effect on heat pump dryer which operates on a vapor compression refrigeration cycle. The energy performance of the heat pump dryer is superior with an average SMER of 2.175 kg/kWh which is 2.22 times greater than that of the electric heater dryer with SMER of 1.224 kg/kWh.
 Keywords
Food dryer;Electric heater;Heat pump;Hot air dryer;MER;SMER;
 Language
Korean
 Cited by
 References
1.
Bannister, P., Carrington, G., and Chen, G., 2002, Heat Pump Dehumidifier Drying Technology Status, Potential and Prospects, Proc. of 7th IEA Heat Pump Conference, Vol. 1, pp. 219-230.

2.
Wijesinghe, B., 1997, Low Temperature Drying of Food Materials Using Energy Efficient Heat Pump Dryers, CADDET Newsletter, No. 7, pp. 4-5.

3.
Bannister, P., Chen G., Grey, A., Carrington, C. G., and Sun, Z. F., 1997, Emission Through Enhanced Dehumidifier Timber Drying, Proc. of 19th Int. Congress of Refrigeration, pp. 241-249.

4.
Kudra, T. and Mujumdar, A. S., 2002, Advanced Drying Technologies, Marcel Dekker. Inc., New York.

5.
Bannister, P., Carrington, G. and Chen, G., 2002, Heat Pump Dehumidifier Drying Technology Status, Potential and Prospects, Proc. of 7th IEA Heat Pump Conference, Vol. 1, pp. 219-230.

6.
Carrington, G., Hewitt, N., Bannister, P., and Anderson, J., 2003, Opportunities for Heat Pump Drying in Industrial Processes, Proc. of Int. Congress on Refrigeration, ICR0540.

7.
KS B 7944, 2007, Agricultural products dryer, pp. 3-4.

8.
Lee, H.-Y., 2006, Quality Characteristice of Dried Radish (Raphanus sativus) by Drying Methods, Sangju National University.

9.
EES, 2012, F-chart Software LLC., V9.100-3D.

10.
Lee, K. H. and Kim, O. J., 2007, Drying Performance Simulation for Basic Design of a Heat Pump Dryer, Transaction of KSMEB, Vol. 31, No. 10, pp. 860-867.