A comprehensive numerical investigation of unsteady-state two-phase flow in gravity assisted heat pipe enclosure

Arat, Halit; Arslan, Oğuz; Ercetin, Umran; Akbulut, Ahmet

doi:10.1016/j.tsep.2021.100993

Cited by 27 publications

(1 citation statement)

References 39 publications

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“…Under the action of the temperature gradient, a large amount of heat propagates upwards, resulting in a smaller drop in the temperature data at a depth of 5 m (Li et al, 2018). ( 2) During the downward flow of the liquid working medium inside the gravity heat pipe, it is heated and evaporated again from liquid to gas in the range of 2.5m~4.5m underground, and absorbs a lot of heat, which leads to a significant cooling effect in this area (Arat et al, 2021). Fig.…”

Section: Analysis Of Single-tube Cooling Testmentioning

confidence: 99%

Ignition control and waste heat assessment of spontaneous combustion gangue hill by gravity heat pipe group: a case study in Shanxi Province, China

Zhou

Guo

Zhang

et al. 2023

Environ Sci Pollut Res

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Spontaneous combustion gangue hill has attracted great attention due to serious environmental pollution and terrible geological disasters. However, the rich thermal resources inside are often ignored. In order to control the spontaneous combustion of gangue hill and utilize the internal waste heat resources, this project studied the combined treatment effect of 821 gravity heat pipes, laid 47 sets of temperature monitoring devices, evaluated the storage of waste heat resources and proposed different waste heat utilization methods. The results show that: (1)The positions of spontaneous combustion are all located on the windward slope. The highest temperature is in the range of 6m~12m underground, exceeding 700 ℃. (2) The single-tube experiment of gravity heat pipe shows that the effective temperature control radius is 2m. The cooling effect is obvious in the range of 3m~5m underground.However, the temperature rises at the depth of 1 m underground. (3) After 90 days of treatment of the gravity heat pipe group, the temperature at the depths of 3m, 4m, 5m and 6m in the high temperature zone dropped by 56℃, 66℃, 63℃ and 42℃ respectively. The maximum temperature drop exceeds 160℃. The average temperature drop in the middle and low temperature areas is between 9°C and 21°C. (4) The concentration of harmful gases (CO, SO2 and H2S) decreases by more than 90%. The hazard level is greatly reduced. (5) The amount of waste heat resources contained within ten meters of the spontaneous combustion gangue hill is 7.83E13J. Waste heat resources can be used for indoor heating and greenhouse cultivation. And, under the temperature difference of 50 °C, 100 °C and 150 °C, the electric energy generated by the heat through the thermoelectric conversion device in the high temperature zone of the gangue hill is 4056.8 kW•h, 7468.2 kW•h and 10603 kW•h, respectively.

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Section: Analysis Of Single-tube Cooling Testmentioning

confidence: 99%