Experimental Thermal Performance of Different Capillary Structures for
Heat Pipes

Krambeck, Larissa; Bartmeyer, Guilherme Antonio; Souza, Diógenes Oliveira de; Fus鉶, D.; Santos, Paulo Henrique Dias Dos; Alves, Thiago Antonini

doi:10.32604/ee.2020.013572

Cited by 7 publications

(7 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…where ' x , ' y , and ' z represent the energy change in different directions, and j stands for the heat conductivity, as shown in Eq. (7).…”

Section: Fluid Dynamicsmentioning

confidence: 99%

“…The FLUENT software is used for experimental simulation to analyze the thermal performance of the exterior insulation board. Several significant factors affecting the heat transfer of the wall are discussed to determine the most crucial factors affecting the thermal performance of the insulation board [7]. The innovation of this research lies in using the related software for simulation analysis combined with the relevant fluid mechanics principles, which were seldom used by predecessors.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of the Thermal Performance of External Insulation in Prefabricated Buildings Using Computational Fluid Dynamics

Wang¹,

Wang²

2022

Fluid Dynamics &Amp; Materials Processing

View full text Add to dashboard Cite

“…where ' x , ' y , and ' z represent the energy change in different directions, and j stands for the heat conductivity, as shown in Eq. (7).…”

Section: Fluid Dynamicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the Thermal Performance of External Insulation in Prefabricated Buildings Using Computational Fluid Dynamics

Wang¹,

Wang²

2022

Fluid Dynamics &Amp; Materials Processing

View full text Add to dashboard Cite

“…Os termossifões também são utilizados em coletores solares a vácuo, altamente eficazes e aplicáveis no aquecimento de água para uso diário, ambientes e também piscinas. Outra área de aplicação é a secagem e desidratação de produtos alimentícios e tecidos, além do resfriamento eletroeletrônico (KRAMBECK et al, 2020(KRAMBECK et al, , 2021NISHIDA et al, 2020).…”

Section: Termossifõesunclassified

Seleção de termossifões para aplicação em um sistema híbrido fotovoltaico/térmico

Machado

Dimbarre

et al. 2021

CONJ

View full text Add to dashboard Cite

Neste trabalho foi realizada uma análise térmica experimental de termossifões distintos para aplicação em um sistema híbrido fotovoltaico/térmico. Os termossifões foram fabricados a partir de tubos de cobre possuindo comprimento total de 840mm. O fluido de trabalho utilizado foi água destilada com razão de preenchimento de 50% do volume do evaporador. O evaporador tem comprimento de 650mm, enquanto a seção adiabática e o condensador têm comprimentos de 80mm e 110mm, respectivamente. O condensador foi resfriado por convecção forçada de água, a seção adiabática foi isolada e o evaporador foi aquecido por um resistor elétrico. Testes experimentais foram realizados para uma carga térmica de 80W a 140W em uma posição a 25° da horizontal (evaporador acima do condensador). A análise térmica foi baseada na distribuição de temperaturas ao longo dos dispositivos passivos de transferência de calor, sua resistência térmica e eficiência térmica. O Termossifão B, que possui maior diâmetro, apresentou melhores resultados nas condições testadas, se mostrando assim a melhor escolha entre os dois termossifões para compor um sistema híbrido fotovoltaico/térmico.

show abstract

“…When absorbing heat, the working fluid starts an evaporation process, a process that occurs at low temperatures because the interior of the tube is evacuated. The fluid vapor is then transported through the center of the tube due to pressure gradients, reaching the upper region called the condenser [7]. In the condenser, the heat absorbed in the evaporator and transported by the steam is dissipated to the external environment, causing the condensation of this steam.…”

Section: Figure 1 Etsc Tubementioning

confidence: 99%

Thermal Performance of Thermosyphons Intended for Evacuated Tube Solar Collector Using Graphene Oxide Nanofluids

Alves¹

2021

JANSET

View full text Add to dashboard Cite

Vacuum tube solar collectors are composed by two concentric glass tubes with the annular space evacuated. At the inner tube a thermosyphon is placed inside a metallic fin in order to absorb sun’s irradiation and heat running water placed at a manifold. Thermosyphons are passive heat transfer devices that absorb heat at the evaporator region, evaporating the working fluid that reaches the condenser in the form of steam. At the condenser, heat is dissipated to the environment, condensing the working fluid that returns to the evaporator, closing the thermodynamic cycle. In this study, thermosyphons with three different working fluids (5 and 10% graphene oxide nanofluids and distilled water) were built and experimentally tested. The evaporator and the adiabatic section have an outer diameter of 8.33mm and lengths of 1,600mm and 40mm, respectively. The condenser has an outer diameter of 13.40mm and a length of 35mm. The filling ratio used was 50% of the evaporator’s volume. A resistive tape wrapped at the evaporator and connected to a power supply was responsible for heating the working fluid by Joule effect, and water flow rates of 0.50, 0.75, and 1.00L/min were responsible for condensing the working fluid at the condenser. Heat loads of 35, 55, and 75W were applied to the devices and K-type thermocouples were responsible for acquiring temperature data from the thermosyphons, allowing the thermal analysis based in the temperature distribution and thermal resistance for each working fluid. The best working fluid for the conditions proposed, out of the three investigated, was 5% graphene oxide.

show abstract

Experimental Thermal Performance of Different Capillary Structures for Heat Pipes

Cited by 7 publications

References 30 publications

Analysis of the Thermal Performance of External Insulation in Prefabricated Buildings Using Computational Fluid Dynamics

Analysis of the Thermal Performance of External Insulation in Prefabricated Buildings Using Computational Fluid Dynamics

Seleção de termossifões para aplicação em um sistema híbrido fotovoltaico/térmico

Thermal Performance of Thermosyphons Intended for Evacuated Tube Solar Collector Using Graphene Oxide Nanofluids

Contact Info

Product

Resources

About