• Proceedings of the SAREK Conference
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• 2006.06a
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• pp.144-149
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• 2006

In this study ice making characteristics are experimentally investigated for the ice slurry generating system which is pneumatically operated. The experimentations are conducted under the various test conditions such as chilled water inlet temperature, aqueous solution concentration, flow rate of cooling water, scraper pitch and frequency of cylinder stroke. For the above experimental conditions, ice making characteristics of the slurry ice generating system are evaluated in terms of the overall heat transfer coefficient, heat transfer rate and the amount of slurry ice generation. And the experimental results show that the heat transfer rate of the system increases as the flow rate of cooling water solution increases and the concentration of ethylene glycol and inlet temperature of chilled water decreases.

• Proceedings of the SAREK Conference
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• 2006.06a
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• pp.111-115
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• 2006

To clarify the hydraulic and thermal characteristics of ice slurry which made from 6.5% ethylene glycol-water solution flow in the double tube and plate type heat exchanger, experimental studies were performed. The mass flux and Ice fraction of ice slurry were varied from 800 to $3,500 kg/m^2s$(or 7 to 17 kg/min) and from 0 to 25%, respectively. During the experiment, it was found that the measured pressure drop and heat transfer rate increase with the mass flux and ice fraction; however the effect of ice fraction appears not to be significant at high mass flux region. At the region of low mass flux, a sharp increase in the pressure drop and heat transfer rate were observed depends on mass flux.

• 보일러설비
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• s.78
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• pp.100-104
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• 2000

본 고에서는 향후 빙축열시스템의 주류를 이룰 것으로 예상되어 활발히 연구개발이 추진되고 있는 Ice Slurry 방식 빙축열시스템에 대하여, 현재까지 개발되었거나 개발중인 시스템들의 특징, 종류, 응용분야 등을 중심으로 한 기술개발 동향 및 향후 추진되어야 할 연구개발방향 등, Ice Slurry 방식 빙축열시스템 전반에 걸친 연구개발 현황과 향후 전망에 대하여 알아보았다.

• 보일러설비
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• s.80
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• pp.111-116
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• 2000

본 고에서는 향후 빙축열시스템의 주류를 이룰 것으로 예상되어 활발히 연구개발이 추진되고 있는 Ice Slurry 방식 빙축열시스템에 대하여, 현재까지 개발되었거나 개발중인 시스템들의 특징, 종류, 응용분야 등을 중심으로 한 기술개발 동향 및 향후 추진되어야 할 연구개발방향 등, Ice Slurry 방식 빙축열시스템 전반에 걸친 연구개발 현황과 향후 전망에 대하여 알아보았다.

• 보일러설비
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• s.79
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• pp.111-114
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• 2000

본 고에서는 향후 빙축열시스템의 주류를 이룰 것으로 예상되어 활발히 연구개발이 추진되고 있는 Ice Slurry 방식 빙축열시스템에 대하여, 현재까지 개발되었거나 개발중인 시스템들의 특징, 종류, 응용분야 등을 중심으로 한 기술개발 동향 및 향후 추진되어야 할 연구개발방향 등, Ice Slurry 방식 빙축열시스템 전반에 걸친 연구개발 현황과 향후 전망에 대하여 알아보았다.

• Proceedings of the SAREK Conference
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• 2006.06a
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• pp.233-238
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• 2006

A new district cooling system using ice slurry for the uncertain cooling load of the future is presented. The chilled water produced by the absorption chillers is used for the base cooling load. The temperature of the chilled water is reduced by mixing of ice slurry depending on increasing of the cooling load. Finally, IPF of the ice slurry is increased up to 10% at the peak load. The transporting mass flow rate is decreased down to 44.7%, and the diameter of the main pipe is decreased down to 66.7%, but the diameter of the branched pipe is designed as the same size of the chilled water.

• Proceedings of the KSME Conference
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• 2007.05b
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• pp.1974-1979
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• 2007

In this study, Ice slurry generator heat transfer characteristics are experimentally investigated for the ice slurry generating system with scraper which is pneumatically operated. The ice slurry generator has the same shape as the vertical double tube type heat exchanger. Refrigerant is flowing in the outside tube and ethylene glycol solution in the inside tube. Refrigerant and solution water are parallel flow type which entering bottom of generator and leaving top of generator. The experimentations are conducted under the various test conditions such as compressor speed and cooling water temperature. For the above experimental conditions, heat transfer characteristics of the ice slurry generating system are evaluated in terms of the overall heat transfer coefficient and the heat transfer rate. And the experimental results show that the heat transfer rate of the system is increased as the compressor speed increases and the cooling water temperature decreases.

• Proceedings of the SAREK Conference
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• 2009.06a
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• pp.1002-1007
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• 2009

The research are performed to check the characteristics of the ice slurry transport system for the district cooling. The system are installed at the 1st floored building which is as large as the $1204\;m^2$ ($86\;m{\times}14\;m$). Three kinds of heat exchanger are selected, such as, plate, spiral and shell & tube type, to apply to the ice slurry systems. Experiment was done in the two cases. The first case, circulation water flow fixed at the design conditions for the state to change the flow of the supply of ice slurry. The second case, Ice slurry flow fixed at the design conditions for the state to change the flow of circulation water. Both side of Energy balance was calculated. The performance of plate heat exchanger is higher than others and it's enthalpy effectiveness is higher too.

• Proceedings of the SAREK Conference
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• 2009.06a
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• pp.662-667
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• 2009

The research are performed to check the characteristics of the ice slurry transport system for the district cooling. The system are installed at the 1st floored building which is as large as the $1204\;m^2$ ($86\;m{\times}14\;m$), and the pumping power and branching characteristics are measured by transporting of the ice slurry. The ice slurry transporting pipe is as long as 200 m. For the same cooling load, the higher IPF is, the lower the transporting flow rate and the pumping power are. But when the IPF is higher than 15%, no less decrease of the pumping power does happen. For the branching characteristics, through the branch pipe where the flow resistance is higher, the higher IPF is measured. A little higher IPF is measured at the thermal expansion branch.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.14 no.12
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• pp.1063-1070
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• 2002

To resist ice adhesion on cooling wall is concerned to continuous ice formation in thermal storage system. In this study, ice slurries were formed with two ecological aqueous solution, one is ethanol+silanol and the other is propylene glycol+silanol. By freezing under stirring the solution of $300m\ell$ in a stainless steel vessel which was immersed and cooled in a temperature controlled bath, the shape of ice slurry and the strength of ice adhesion on wall was observed with measuring the temperature and stirring load variation. As the concentration is smaller and the supercooling degree is larger, the ice adhesion is easy to occur. When the stirring load is larger than$ 2.1\times10^{-5}W$, the ice adhesion occurred.