Abstract
Energy performance of electric heater and geothermal source heat pump type hot air dryers arecompared in this study. For set temperatures of 30℃, 35℃ and 40℃, radish is dried from initial mass60 kg until it gets 5 kg, where the difference equals the amount of water removed. As set temperatureis increased, drying time is shortened for both electric heater and heat pump types, however energyefficiency is decreased due to increasing electricity consumption. Moisture extraction rate(MER) ofelectric heater is 2.58~2.84 kg/h, and for heat pump type 2.56~2.71 kg/h, showing little differencebetween the two types. Specific moisture extraction rate (SMER) of electric heater is 0.94~0.96 kg/kWh, and for heat pump type 1.72~2.21 kg/kWh. SMER of heat pump type is greater by 0.78~1.25kg/kWh than the electric heater hot air dryer, which is 1.8~2.3 times better in terms of energy efficiency.
| Translated title of the contribution | Energy Performance Comparison of Electric Heater and Geothermal Source Heat Pump type Agricultural Hot Air Dryers |
|---|---|
| Original language | Korean |
| Pages (from-to) | 7-12 |
| Number of pages | 6 |
| Journal | 한국지열에너지학회논문집 |
| Volume | 14 |
| Issue number | 4 |
| DOIs | |
| State | Published - Dec 2018 |