Drying Performance Simulation for the Basic Design of a Heat Pump Dryer

열펌프 건조기의 기본 설계를 위한 건조 성능 해석

  • 이공훈 (한국기계연구원 에너지기계연구센터) ;
  • 김욱중 (한국기계연구원 에너지기계연구센터)
  • Published : 2007.10.01


Heat pump drying has a great potential for energy saving due to its high energy efficiency in comparison with conventional air drying. In the present study, the performance simulation for the basic design of a heat pump dryer has been carried out. The simulation includes one-stage heat pump cycle, simple drying process using the drying efficiency. As an example, the heat pump cycle with Refrigerant 134a has been investigated. For the operating conditions such as the average temperature of the condenser, the heat rate released in the condenser, the flow rate of drying air, and drying efficiency, the simulation has been carried out to figure out the performance of the dryer. The parameters considered in the design of the dryer are COP, MER, SMER, the rate of dehumidification, the temperature and humidity of drying air and those parameters are compared for different conditions after carrying out the simulation.



  1. Mujumdar, A. S., 1995, Handbook of Industrial Drying, Marcel Dekker. Inc., New York
  2. 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
  3. Carrington, G., Hewitt, N., Bannister, P. and Anderson, J., 2003, 'Oppertunities for Heat Pump Drying in Industrial Processes,' Proc. of Int. Congress on Refrigeration, ICR0540
  4. Wijesinghe, B., 1997, 'Low Temperature Drying of Food Materials Using Energy-Efficient Heat Pump Dryers,' CADDET Newsletter, No. 7, pp. 4-5
  5. Bannister, P., Chen. G., Grey, A., Carrington, C. G. and Sun, Z. F., 1997, 'Economic Reduction of Greenhouse Gas Emission Through Enhanced Dehumidifier Timber Drying,' Proc. of 19th Int. Congress of Refrigeration, pp. 241-249
  6. Prasertsan, S., Saen-Saby, P., Prateepchaikul, G. and Ngamsritrakul, P., 1996, 'Effects of Producr Drying Rate and Ambient Condition on the Operating Modes of Heat Pump Dryer,' Proc. of 10th Int. Drying Symp., Vol. A, pp. 529-534
  7. Kudra, T. and Mujumdar, A. S., 2002, Advanced Drying Technologies, Marcel Dekker. Inc., New York
  8. Prasertsan, S., Saen-Saby, P., Ngamsritrakul, P., and Prateepchaikul, G., 1996, 'Heat Pump Dryer Part 1: Simulation of the Models,' Int. J. Energy Research, Vol. 20, pp. 1067-1069<1067::AID-ER229>3.0.CO;2-G
  9. Parsons, R. A., ed., 1997, ASHRAE Handbook: 1997 Fundamentals, SI ed., ASHRAE, Atlanta
  10. Braun, J. E., Bansal, P. K., and Groll, E. A., 2002, 'Energy Efficiency Analysis of Air Cycle Heat Pump Dryers,' Int. J. Refrigeration, Vol. 25, pp. 954-965