| Autor: |
Budijono, Agung Prijo, Habib, Bidya Nur, Setiyawan, Nandha |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2016, Vol. 1778 Issue 1, p1-11, 11p, 2 Diagrams, 1 Chart, 17 Graphs |
| Abstrakt: |
Solar dryer is an energy conversion device that absorbs solar radiation, then the heat generated is distributed to the drying chamber by the working fluid. One of passive solar dryer type utilizes chimney to optimize air flow rate through the drying chamber. Moreover, it has a function to keep the heat flows from the environment through the drying chamber in order to the temperature and humidity get better and more efficient in the process of drying materials. One way to improve solar dryer performance is modify the chimney. This study aimed to determine the performance of passive type solar dryer. The method used in this study is an experimental research with quantitative descriptive analysis. Modification included the height (1 m and 1.5 m), the angle slope variation (450 and 900) and transparency wall of chimney. Based on the result of drying material (0.32 kg sand and 0.8 kg water) starting from 11.00 - 14.00 with the composition variation of chimney, got average value of temperature 50.20 C - 51.10 C, humidity 19.1% - 2.4% and air flow out 0.32 m/s - 0.55 m/s. From the overall data, dryer with chimney variations 1 m inclined 450 (eastern-western transparent wall) is the best with efficiency value 3.93%, mass flow rate 1.66E-03 kg/s. It was proved that chimney 1 m inclined 45° (eastern-western transparent wall) to the north, cause the dark southern wall absorbs more radiation, meanwhile eastern-western transparent wall forward radiation then absorbed by the dark northern wall. The temperature difference between the chimney and the environment 15.440 C increased the bouyancy force. Chimney 1 m height result in pressure drop caused by the altitude, temperature difference and friction between air and wall get greater, increasing bouyancy force and optimizes the air flow rate out of 0.51 m / s. The conclusion is chimney 1 m inclined 450 (eastern-western transparent wall) give possitive effect to improve efficiency and mass flow rate in the dryer. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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