• Transactions of the Korean Society of Mechanical Engineers B
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• v.25 no.12
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• pp.1730-1738
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• 2001

This paper presents an overview of testing and analyzing field performance of a centrifugal chiller which has a rated capacity of 200 RT(703 kW). Field data of a chiller installed in the cleanroom research building of KIST has been collected far performance analysis. The operating data included start-up, shut-down, and quasi-static state where cooling capacity and compressor power consumption varied cyclically. It was found that the steady-state thermodynamic model could be applied to relate the cooling capacity and COP under quasi-static conditions. The results led to finding the required cooling load pattern and a possible energy saving method. This study provides a method of evaluating performance of a large capacity centrifugal chiller in which field test is necessary.

• 한국생물공학회:학술대회논문집
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• 2003.04a
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• pp.371-373
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• 2003

In experiments on sea water, it took longer to reach almost steady state and the foam heights were increased as increasing initial protein concentration. The foam height was increased with the decrease of the pore size. G3, G4, and air stone were similar. It was increased with the increase in the superficial air velocity (SAV) and it was efficient when the SAV is $0.7{\sim}0.8\;cm/sec$. The optimum pH condition is weak acid and weak base region. The influence of salts, $NaHCO_3$, was not that significant due to NaCl in the sea water.