| dc.description.abstract | A GHE (green house effect) hybrid dryer using solar concentrator as its additional heater has been developed. A simulation and performance test was performed in order to know the contribution of concentrator and heat exchanger as source of thermal energy in dryer. The simulation was based on the heat balance of each system’s component which is solved numerically. Method used in this test was consisted of seven treatment that involving collector tank, heat exchanger, and solar concentrator. Result showed that concentrator could increase water temperature with mass 25 kg for 420 minutes from 30.9 oC to 42.7 oC at average solar energy absorption of 762.8 W/m2. Temperature between dryer room temperature and ambient temperature was 8.6 oC, while night time tests with dryer heater in collector tank resulted difference between dryer room temperature and ambient temperature at 6.3 oC. However, utilization of solar concentrator in this GHE dryer was less efficient due to its low capability to increase temperature. The temperature distribution simulation could described the real condition which in shown by be R2 value of simulation test of concentrator, heat exchanger, collector tank and concentrator’s integrated system were 0.5787, 0.9691, 0.9963 and 0.9762 respectively. | en |
