The efficiency of using simple heat pipes with a relatively low thermal conductivity for cooling transmit/receive modules

Nikolaenko, Yu.E.; Pis'mennyi, E.N.; Pekur, D.V.; Sorokin, V.M.; Кravets, V.Yu.; Melnyk, R.S.; Kozak, D.V.; Solomakha, A.S.

doi:10.1016/j.applthermaleng.2023.121512

Cited by 3 publications

(1 citation statement)

References 46 publications

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“…Through precise control and coordination, these units or sub arrays can collaborate to achieve the orientation and adjustment of radar beams, thereby achieving high-precision detection and tracking of targets. In this antenna array subsystem, the transmit/receive (T/R) component plays a crucial role, responsible for signal processing and transmission [23].…”

Section: Fundamentals Of Radar Transceiversmentioning

confidence: 99%

An optimized sparse deep belief network with momentum factor for fault diagnosis of radar transceivers

Shi,

Li,

Chen

2024

Meas. Sci. Technol.

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Transceiver is a crucial component of radar system that allows for the regulation of signal phase and amplitude as well as the amplification of both transmitted and received signals. Its operational efficiency has a significant impact on the whole dependability of the radar system. To ensure the safe and reliable operation of the radar system, an optimized sparse deep belief network with momentum factor is developed to diagnose potential faults of radar transceivers. Firstly, a momentum term is added into the parameter update to enhance the anti-oscillation ability of model parameters in training, while a sparse regular term is integrated into the deep belief network to prevent the model from overfitting. Secondly, to automatically configure the model hyper-parameters, a hybrid sine cosine algorithm with dynamic inertia weight and adaptive strategies is proposed. Thus, an effective diagnostic model named HSCA-MS-DBN is formed by combining sparse deep belief network with momentum factor and hybrid sine cosine algorithm. The efficiency of the proposed HSCA-MS-DBN model is confirmed using an actual-world radar transceiver dataset, and the findings from experiments reveal that this model surpasses multiple prominent intelligent models.

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Section: Fundamentals Of Radar Transceiversmentioning

confidence: 99%

An optimized sparse deep belief network with momentum factor for fault diagnosis of radar transceivers

Shi,

Li,

Chen

2024

Meas. Sci. Technol.

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Experimental Investigation on the Thermal Performances of a New Design of Pulsating Heat Pipe With Two Condensers

Nikolaenko,

Solomakha,

Melnyk

et al. 2024

Journal of Thermal Science and Engineering Applications

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In this paper a novel design of pulsating heat pipe (PHP) with one evaporator and two condensers located on both sides of the evaporator at an angle to the horizon was proposed, manufactured and experimentally investigated for the purpose of use in cooling systems for electronic devices operating in a tilted position. The PHP body is made of a copper capillary tube with an inner diameter of 1.5 mm. The working fluid is methanol. The number of turns is 4. The heating zone dimensions are 60 mm × 36 mm, the cooling zone is 200 mm × 35 mm. The dependences of the temperature in the heating and cooling zones and the PHP thermal resistance both on the power input (from 30 W to 200 W), and on the orientation in space (at tilt angles of 0°, 15°, 30°, 60°, 90°) were obtained. In the power range from 120 W to 200 W the tilt angle practically does not affect the thermal resistance. A comparison of the thermal resistance of the developed PHP with known PHPs filled with methanol, showed the high efficiency of the developed PHP: at power input from 120 W to 200 W, the thermal resistance was from 0.2 °C W−1 to 0.18°C W−1. The developed PHP design is promising for use in air cooling systems, for instance, of radar transmit/receive modules and high-power LED lighting systems.

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Visualization of vaporization processes and thermal characteristics of a thin flat gravity heat pipe with a threaded evaporator

Melnyk,

Lipnitskyi,

Nikolaenko

et al. 2023

TKEA

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The paper presents research on the visualization of boiling processes in a flat gravitational heat pipe within a range of thermal fluxes from 5 to 55 W. The main objective of the study is to identify visual patterns during boiling and correlate them with thermal characteristics obtained during research conducted with visual observations. Due to the high-speed nature of the processes, observations were made using a high-speed camera. Temperature values on the heat pipe's surface were also recorded using thermocouples and measurement systems. To obtain a comprehensive picture of the study, experiments were conducted at various inclination angles of the experimental heat pipe sample to the horizon, ranging from 0° to 90°. Visual schemes of boiling and evaporation were obtained and explained simultaneously with thermal performance of experimental sample. The study allowed discovering that, in terms of thermal resistance, 60° is the optimal inclination angle. On the other hand, the lowest evaporator temperature was obtained for 15° and 30° angles. Additionally, it was observed that the experimental sample is able to operate when positioned horizontally. Maximal transferred heat fluxes were extremely low compared to other angles. Nevertheless, even at horizontal orientation, thermal resistance was lower than for vertical position.

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The efficiency of using simple heat pipes with a relatively low thermal conductivity for cooling transmit/receive modules

Cited by 3 publications

References 46 publications

An optimized sparse deep belief network with momentum factor for fault diagnosis of radar transceivers

An optimized sparse deep belief network with momentum factor for fault diagnosis of radar transceivers

Experimental Investigation on the Thermal Performances of a New Design of Pulsating Heat Pipe With Two Condensers

Visualization of vaporization processes and thermal characteristics of a thin flat gravity heat pipe with a threaded evaporator

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