The parameters influencing sphere cooling in a cold liquid

The new method of study heat transfer is the gradient heat flux measurement. It allows measuring the heat flux per unit area for unsteady film boiling at the spherical surface. For the first time distribution over the surface of heat flux per unit area and heat transfer coefficient were derived. The time dependences for the local heat flux per unit area and heat transfer coefficient were obtained in different angles of the spherical surface. The spherical surface was made of titanium VT 22 with a diameter of 20 mm. High-speed shooting supplemented the experimental curves with a frequency of 1 kHz. The error of heat flux per unit area measurement was not exceeding 12%.

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Gradient heat flux measurement in study of unsteady water film boiling at the surface of the sphere

Сапожников

Mityakov

Subbotinа

2019

J. Phys.: Conf. Ser.

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Intensification of cooling fluid process

Slavyanskiy

Семенов

Babakin

et al. 2020

Foods and Raw Materials

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A number of sectors in the food industry practice cooling substances of biological origin. This contributes to the maintenance of their biological properties, as well as prevents microflora growth in the product. One of the ways to intensify production processes and maintain the quality of raw materials and finished products is their accelerated cooling with the help of low-energy cooling equipment. The use of physical bodies cooled to low temperatures is a promising way to accelerate liquid cooling. We used balls with frozen eutectic solution. In our research, the problem of cooling a liquid system is formulated and solved within the framework of classical linear boundary value problem for the equation of a stationary convective heat transfer. In the area of the actual values of the process parameters on the study object, the solution obtained is used as the basis for numerical experiment on the modelling of the cooling liquid flow with the cooling agent system, namely balls filled with eutectic solution. By calculation, the efficiency of the proposed method for cooling liquid was justified based on such factors as temperature, the number of balls in a two-phase liquid system, and the duration of low-temperature treatment. The presented results of the numerical experiment complied with real heat transfer processes during liquid cooling.

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The parameters influencing sphere cooling in a cold liquid

Cited by 2 publications

References 3 publications

Gradient heat flux measurement in study of unsteady water film boiling at the surface of the sphere

Gradient heat flux measurement in study of unsteady water film boiling at the surface of the sphere

Intensification of cooling fluid process

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