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Analysis of ice slurry production by direct contact heat transfer of air and water solution

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第8期14卷 583-588页

作者： Xue-jun ZHANG Ke-qing ZHENG Ling-shi WANG Wei WANG Min JIANG Sheng-ying ZHAO Institute of Refrigeration and Cryogenics Zhejiang University School of Information and Electrical Engineering Zhejiang University City College

In this paper, a novel system using direct contact heat transfer between air and water solution was proposed to generate ice slurry. The heat transfer process and the system performance were studied; energy efficiency coefficients of 0.038, 0.053, and 0.064 were obtained using different solutions. An empirical relationship between the volumetric heat transfer coefficient U v and the main parameters was obtained by fitting the experimental data. The U v calculated from the empirical formula agreed with the experimental U v quite well with a relative error of less than 15%. Based on the empirical formula, a laboratory-scale direct contact ice slurry generator was then constructed, with practical application in mind. If the air flow rate is fixed at 200 m 3 /h, the ice production rate will be 0.091 kg/min. The experimental results also showed that the cold energy consumption of the air compressor accounted for more than half of the total amount. To improve the system energy efficiency coefficient, it is necessary to increase the air pipes insulation and the solution's thermal capacity, and also it is appropriate to utilize the free cold energy of liquefied natural gas (LNG).

关键词： ice slurry Generator Air and water solution Direct contact Volumetric heat transfer coefficient Liquefied naturalgas (LNG)

A novel ice slurry producing system with vacuum freezing

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Journal of Central South University 2017年第3期24卷 736-742页

作者： TANG Yi-fang School of Energy Science and Engineering Central South University Changsha 410083 China Collaborative Innovation Center of Building Energy Conservation & Environmental Control Zhuzhou 412007 China

A novel vacuum ice slurry producing system with jet-pumps was proposed to deal with the problems of high energy consumption and ice *** this novel system,one steam driven by a jet-pump was used to create vacuum in a hermetic vessel where water was sprayed through a nozzle to produce ice slurry,while the other steam was used to provide enough cold energy to make the left vapor in the hermetic vessel *** models of this novel system were established and theoretical simulation on the performance characteristics was also implemented based on the MATLAB *** show that the novel system is feasible and practicable,and the system performance is affected by many factors,such as the temperature of the generators,condensing temperature,evaporation temperature,and the cooling load of the refrigerator *** findings are helpful to improve the performance of ice slurry producing system.

关键词： ice slurry vacuum freezing ejector solar energy

ice slurry Formation in a Cocurrent Liquid-Liquid Flow

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Chinese Journal of Chemical Engineering 2008年第4期16卷 552-557页

作者：彭正标袁竹林梁坤峰蔡杰 School of Energy and Environment Southeast University Nanjing 210096 China

A new technique for ice slurry production was explored. Multiple small water-drops were formed in another immiscible chilled liquid by a single-nozzled atomizer and frozen in the fluidized bed by direct contact heat transfer. Experiments were conducted to investigate the dynamic behaviors of the ice crystal making system. The results demonstrate that the ice crystals could be produced continuously and stably in the vertical bed with the circulating coolant of initial temperature below -5℃. The size distribution of the ice crystals appears non-uniform, but is more similar and more uniform at lower oil flow rate. The mean ice crystal size rests seriously with the jet velocity and the oil flow rate. It decreases with decreasing the oil flow rate, and reaches the maximum at an intermediate jet velocity at about 16.5 m.s y. The ice crystal size is also closely related to the phenomenon of drop-coalescing, which can be alleviated considerably by reducing the flow rate or lowering the temperature of the carrier oil. However, optimization of liquid-liquid atomization is a more effective approach to produce fine ice crystals of desired size.

关键词： ice slurry drop-coalescing ice crystal size distribution liquid-liquid atomization

Research progress of mobile cold storage using ice slurry

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Energy Storage and Saving 2023年第3期2卷 503-512页

作者： Tao Yu Qun Du Mingbiao Chen Yongzhen Chen Wenji Song Ziping Feng Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou510640China School of Energy Science and Engineering University of Science and Technology of ChinaHefei230027China Key Laboratory of Renewable Energy Chinese Academy of SciencesGuangzhou510640China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou510640China

The demand for cooling,such as that of products,spaces,and processes,has increased with the development of *** storage can shift the valley time of electric power to cold *** to the fixed cold storage routine,mobile cold storage can eliminate site *** slurry,as a new functional fluid,has recently become a new source of technology in our social ***,the research status of ice slurry mobile cold storage is *** in the engineering field,such as space cooling,fisheries,pipeline cleaning,firefighting,and other real scenarios,are ***,key issues are summarized to understand the theoretical basis of ice slurry mobile cold storage,including flow,heat transfer,and loss in the mobile cold storage process-related ice *** tap water ice slurry and binary ice slurry are distinguished and ***,beneficial policy analyses and market prospects for its promotion are *** summary,ice slurry mobile cold storage is a popular research topic with broad prospects for energy storage.

关键词： ice slurry Mobile cold storage Non-Newtonian fluid Heat transfer

Liquid dehumidification-assisted evaporative supercooling method for ice slurry production

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Journal of Southeast University(English Edition) 2010年第2期26卷 351-354页

作者：李秀伟张小松东南大学能源与环境学院南京210096

Due to the fact that the conventional ice slurry production system using supercooled water suffers from ice block and depends heavily on electric power,a novel ice slurry production system is *** new system consists of two major parts：the evaporative supercooling process and the liquid dehumidification *** classical diffusion-control equation is improved by introducing an impact factor into the simulation analysis in the evaporative supercooling ***,experiments are carried out by adopting the particle analyzer to detect the radii and the velocities of the droplets,and an infrared camera to examine the temperature profile of the physical *** is found that the theoretical conclusion agrees well with the experimental *** with the conventional system,the new system can alleviate the burden on electric power and raise *** improvements are essentially attributed to the reutilization of the inner waste heat generated from the system itself.

关键词： ice slurry liquid dehumidification evaporation

Effect of Liquid versus ice slurry Ingestion on Core Temperature during Simulated Mining Conditions

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Open Journal of Preventive Medicine 2016年第1期6卷 21-30页

作者： Joseph Maté Rodney Siegel Jacques Oosthuizen Paul B. Laursen Greig Watson School of Exercise and Health Sciences Edith Cowan University Joondalup Australia High Performance Sport New Zealand Auckland New Zealand Sport Performance Research Institute New Zealand (SPRINZ) Auckland University of Technology Auckland New Zealand Faculty of Health Sciences School of Human Life Sciences University of Tasmania Tasmania Australia

Miners in Australia frequently perform physically demanding work under high ambient temperatures and humidity, often whilst wearing personal protective equipment, leading to heat-related illnesses. This study investigated effects of replacing 100% and 50% sweat losses with 5% carbohydrate liquid or ice-slurry solution on core temperature during simulated mining conditions. Five randomized treadmill trials were performed with: no fluid replacement (NF), 100% (100 ice) and 50% (50 ice) sweat loss replaced with ice-slurry (~-1°C) solution and 100% (100 LIQ) and 50% (50 LIQ) sweat loss replaced with liquid (~+4°C) solution. Time to exhaustion was longer in 100 ice followed by 100 LIQ, 50 ice, 50 LIQ and NF. Change in rectal temperature was least in 100 ice followed by 100 LIQ, 50 ice, 50 LIQ and NF. Ingestion of ice-slurry resulted in longer time to exhaustion and slower rates of change in rectal temperature. It is recommended that ice-slurry drinks be provided to personnel to lower heat strain during hot working conditions.

关键词： Thermoregulation Occupational Heat Stress Cooling Intervention ice slurry