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This paper dealed with thickness variation of bottom heat sotrage zone due to salinity and flow rate of extration hot brine in small test solar pond (0.5m wide, 0.5m high, 1.0m long).
Testing apparatus and situation were follows: 7.1㎝ of height of suction diffuser and 1.8㎝ of height of discharge diffuser above the test pond respectively, 0.3㎝ of slot size of suction diffuser, 1.0㎝ of slot size of discharge diffuser, 47㎝ of length of the slot; heating of hot water (75℃) through separated hot water tank, discharge of the brine into storage zone through discharge diffuser, the extration of the brine through suction diffuser, circulation of the extracted brine through a heat exchanger (cooler).
Following results were obtained through the experiments.
1. In small test solar pond, the typical three zone which showed up in real solar pond were established.
2. Richardson Number was used more effectively to confirm hydrodynamic stability of the stratified flow.
3. The thickness of nonconvective layer had a great effect on the heat storage of the bottom convective layer, then the temperature of bottom convective layer had a relation to that of upper convective layer.
4. Optimum operating condition in the test pond was on 10%-15% of salt concentration and 0.05㎥/hr of flow rate of extraction hot brine.
5. Following thickness of 3 zones were available to obtain under optimum operation condition:
ο bottom storage zone : 30%±10% of total pond depth
ο non-convective zone : 40%±10% of total pond depth
ο Upper surface zone : 20%±10% of total pond depth
Testing apparatus and situation were follows: 7.1㎝ of height of suction diffuser and 1.8㎝ of height of discharge diffuser above the test pond respectively, 0.3㎝ of slot size of suction diffuser, 1.0㎝ of slot size of discharge diffuser, 47㎝ of length of the slot; heating of hot water (75℃) through separated hot water tank, discharge of the brine into storage zone through discharge diffuser, the extration of the brine through suction diffuser, circulation of the extracted brine through a heat exchanger (cooler).
Following results were obtained through the experiments.
1. In small test solar pond, the typical three zone which showed up in real solar pond were established.
2. Richardson Number was used more effectively to confirm hydrodynamic stability of the stratified flow.
3. The thickness of nonconvective layer had a great effect on the heat storage of the bottom convective layer, then the temperature of bottom convective layer had a relation to that of upper convective layer.
4. Optimum operating condition in the test pond was on 10%-15% of salt concentration and 0.05㎥/hr of flow rate of extraction hot brine.
5. Following thickness of 3 zones were available to obtain under optimum operation condition:
ο bottom storage zone : 30%±10% of total pond depth
ο non-convective zone : 40%±10% of total pond depth
ο Upper surface zone : 20%±10% of total pond depth
목차
ABSTRACT
Ⅰ. 序論
Ⅱ. 實驗裝置와 實驗節次
Ⅲ. 實驗結果
Ⅳ. 考察
Ⅴ. 結論
REFERENCES
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