Numerical simulation investigation on thermal performance of heat pipe flat-plate solar collector

Zhang, Dongwei; Tao, Hanzhong; Wang, Mimi; Sun, Zishuai; Jiang, Chuan

doi:10.1016/j.applthermaleng.2017.02.089

Cited by 62 publications

(14 citation statements)

References 30 publications

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“…Furthermore, the cold side mass flow rate becomes 2.9 m 3 /h, and the maximum condensation heat transfer coefficient increases from 6.62 × 10 3 to 7.13 × 10 3 W/(m 2 •K). According to Equations (11) and (12), the condensation heat transfer coefficient is calculated by the physical parameters of saturated vapor and saturated liquid at saturation temperature, so it is similar to the change trend of the minimum saturated vapor temperature. When the hot side mass flow rate is constant, the minimum saturated vapor temperature decreases with the increase in the cold side mass flow rate, so the condensation heat transfer coefficient decreases with the decrease in the minimum saturated vapor temperature.…”

Section: Effect Of Mass Flowmentioning

confidence: 99%

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Numerical Analysis of Liquid–Liquid Heat Pipe Heat Exchanger Based on a Novel Model

et al. 2021

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Heat pipe heat exchangers (HPHEXs) are widely used in various industries. In this paper, a novel model of a liquid–liquid heat pipe heat exchanger in a countercurrent manner is established by considering the evaporation and condensation thermal resistances inside the heat pipes (HPs). The discrete method is added to the HPHEX model to determine the thermal resistances of the HPs and the temperature change trend of the heat transfer fluid in the HPHEX. The established model is verified by the HPHEX structure and experimental data in the existing literature and demonstrates numerical results that agree with the experimental data to within a 5% error. With the current model, the investigation compares the effectiveness and minimum vapor temperature of the HPHEX with three types of HP diameters, different mass flow rates, and different H* values. For HPs with a diameter of 36 mm, the effectiveness of each is improved by about 0.018 to 0.029 compared to HPs with a diameter of 28 mm. The results show that the current model can predict the temperature change trend of the HPHEX well; in addition, the effects of different structures on the effectiveness and minimum vapor temperature are obtained, which improve the performance of the HPHEX.

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Section: Effect Of Mass Flowmentioning

confidence: 99%

“…[4]. HPHEXs are applied in various industries, such as waste heat recovery [5,6], nuclear power plants [7,8], HVAC (heating, ventilation and air conditioning systems) [9], solar energy systems [10,11], the automobile industry [12], CPU cooling [13], data center cooling [14], and many more.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Liquid–Liquid Heat Pipe Heat Exchanger Based on a Novel Model

et al. 2021

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“…Anisotropic entire region [10,24,26] Isotropic entire region [11,23,25,27] The entire region divided into the wall region, vapor region, and wick region [12] Due to the small internal space, the phase change simulation of thin aluminum vapor chambers is more difficult. In the actual design of the vapor chambers' heat dissipation system, the thin aluminum vapor chambers are also simplified as the heat pipe.…”

Section: Simplified Models Referencementioning

confidence: 99%

“…The application of a flat heat pipe in LED heat dissipation technology was numerically simulated. Zhang et al [24] studied the thermal performance of three-dimensional heat pipe flat solar collectors based on the finite volume method, which helped to design and optimize heat pipe flat solar collectors. Chen et al [10] used isotropic and anisotropic methods to calculate the effective thermal conductivity of the vapor chamber.…”

Section: Introductionmentioning

confidence: 99%

Research on a Simplified Model of an Aluminum Vapor Chamber in a Heat Dissipation System

Han

Yang

Tian

et al. 2019

Entropy

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With the rapid increase of power densities of electronic components, the traditional heat dissipation method of air forced convection has reached a heat transfer limit. As efficient phase change heat exchangers, vapor chambers have become an important guarantee for the development of high-power electronic components. Aluminum vapor chambers have become the future development trend because they are more lightweight and less expensive. In order to study the suitable simplified model of the aluminum vapor chamber in the radiating system, the testing system is established to test the thermal characteristics of the vapor chamber. First, six simplified models of the vapor chamber are proposed. Then, the thermal characteristics of the simplified models are simulated by STAR CCM+ software. Next, the error of the thermal resistance of the simplified model and the real vapor chamber is analyzed. Finally, a most suitable simplified model is obtained in the cooling system.

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“…A three-dimensional steady-state numerical model based on finite volume method was proposed by Zhang et al [81]…”

Section: Other Mathematical Modelsmentioning

confidence: 99%

A review of latest developments, progress, and applications of heat pipe solar collectors

Shafieian

Khiadani

Nosrati

2018

Renewable and Sustainable Energy Reviews

141

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Among all the available solutions to the current high energy demand and consequent economic and environmental problems, solar energy, without any doubt, is one of the most promising and widespread solutions. However, conventional solar systems face some intractable challenges affecting their technical performance and economic feasibility. To overcome these challenges, increasing attention has been drawn towards the utilization of heat pipes, as an efficient heat transfer technology, in conventional solar systems. To the authors' knowledge, despite many valuable studies on heat pipe solar collectors (mainly during the last decade), a comprehensive review which surveys and summarizes those studies and identifies the research gaps in this field has not been published to date. This review paper provides an overview of the recent studies on heat pipe solar collectors (HPSCs), their utilization in different domestic, industrial, and innovative applications, challenges, and future research potentials. The concept and principles of HPSCs are first introduced and a review of the previous studies to improve both energy efficiency and cost effectiveness of these collectors is presented. Moreover, a concise section is dedicated to mathematical modeling to demonstrate suitable methods for simulating the performance of HPSCs. Also, the latest applications of HPSCs in water heating, desalination, space heating, and electricity generation systems are reviewed, and finally, some recommendations for future research directions, regarding both development and new applications, are made.

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Numerical simulation investigation on thermal performance of heat pipe flat-plate solar collector

Cited by 62 publications

References 30 publications

Numerical Analysis of Liquid–Liquid Heat Pipe Heat Exchanger Based on a Novel Model

Numerical Analysis of Liquid–Liquid Heat Pipe Heat Exchanger Based on a Novel Model

Research on a Simplified Model of an Aluminum Vapor Chamber in a Heat Dissipation System

A review of latest developments, progress, and applications of heat pipe solar collectors

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