Numerical study of the thermal performance of a hydrogen pulsating heat pipe

Sun, Ximing; Li, Sizhuo; Wang, Bo; Ji, Bo; Pfotenhauer, John M.; Miller, Franklin G.; Gan, Zhihua

doi:10.1016/j.ijthermalsci.2021.107302

Cited by 7 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The simulated T e and p were the average values during 16 s~32 s, as shown in Figure 6. The experimental T e , p, and T c have been reported in the previous study [30,31]. In our simulations, T c was the same as the experimental data, which was also the boundary condition for the condenser.…”

Section: Comparison Between Simulation and Experimentsmentioning

confidence: 66%

See 1 more Smart Citation

Numerical Study of Heat Transfer and Fluid Flow Characteristics of a Hydrogen Pulsating Heat Pipe with Medium Filling Ratio

Yang,

Bu,

Jiao

et al. 2024

Energies

View full text Add to dashboard Cite

Benefiting from its high thermal conductivity, simple structure, and light weight, the pulsating heat pipe (PHP) can meet the requirements for high efficiency, flexibility, and low cost in industrial heat transfer applications such as aerospace detector cooling and vehicle thermal management. Compared to a PHP working at room temperature, the mechanism of a PHP with hydrogen as the working fluid differs significantly due to the unique thermal properties of hydrogen. In this paper, a two-dimensional model of a hydrogen PHP with a filling ratio of 51% was established to study the flow characteristics and thermal performance. The volume of fluid (VOF) method was used to capture the phase distribution and interface dynamics, and the Lee model was employed to account for phase change. To validate the model, a comparison was conducted between the simulation results and experimental data obtained in our laboratory. The simulation results show that the pressure and temperature errors were within 25% and 5%, respectively. Throughout a pressure oscillation cycle, the occurrence of uniform flow velocity, acceleration, and flow reversal can be attributed to the changes in the vapor–liquid phase distribution resulting from the effect of condensation and evaporation. In addition, when the fluid velocity was greater than 0.6 m/s, dynamic contact angle hysteresis was observed in the condenser. The results contribute to a deeper understanding of the flow and heat transfer mechanism of the hydrogen PHPs, which have not been yet achieved through visualization experiments.

show abstract

Section: Comparison Between Simulation and Experimentsmentioning

confidence: 66%

“…Previously, our team developed a one-dimensional numerical model of a hydrogen PHP with two turns [30]. Due to the limitation of dimension, the specific gas-liquid interface flow inside the tube was not observed.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Heat Transfer and Fluid Flow Characteristics of a Hydrogen Pulsating Heat Pipe with Medium Filling Ratio

Yang,

Bu,

Jiao

et al. 2024

Energies

View full text Add to dashboard Cite

show abstract

“…The circulation was hindered when the filling rate was too low and the OHP could not be started normally. Sun et al [114] simulated OHPs with hydrogen as the working fluid. The influence of hydrogen on the latent heat transfer was 45~51%, which is proportional to the volume fraction of gas.…”

Section: Gas Working Fluidmentioning

confidence: 99%

A Review of Working Fluids and Flow State Effects on Thermal Performance of Micro-Channel Oscillating Heat Pipe for Aerospace Heat Dissipation

Xin

Jiang

et al. 2023

Aerospace

View full text Add to dashboard Cite

A MCOHP (micro-channel oscillating heat pipe) can provide lightweight and efficient temperature control capabilities for aerospace spacecraft with a high power and small size. The research about the heat flow effects on the thermal performance of MCOHPs is both necessary and essential for aerospace heat dissipation. In this paper, the heat flow effects on the thermal performance of MCOHPs are summarized and studied. The flow thermal performance enhancement changes of MCOHPs are given, which are caused by the heat flow work fluids of nano-fluids, gases, single liquids, mixed liquids, surfactants, and self-humidifying fluids. The use of graphene nano-fluids as the heat flow work medium can reduce the thermal resistance by 83.6%, which can enhance the maximum thermal conductivity by 105%. The influences of gravity and flow characteristics are also discussed. The heat flow pattern changes with the work stage, which affects the flow mode and the heat and mass transfer efficiency of OHP. The effective thermal conductivity varies from 4.8 kW/(m·K) to 70 kW/(m·K) when different gases are selected as the working fluid in OHP. The study of heat flow effects on the thermal performance of MCOHPs is conducive to exploring in-depth aerospace applications.

show abstract

Experimental investigation on the ethane pulsating heat pipe under asymmetric heating

Zhan

Chen

et al. 2023

Applied Thermal Engineering

View full text Add to dashboard Cite

Numerical study of the thermal performance of a hydrogen pulsating heat pipe

Cited by 7 publications

References 30 publications

Numerical Study of Heat Transfer and Fluid Flow Characteristics of a Hydrogen Pulsating Heat Pipe with Medium Filling Ratio

Numerical Study of Heat Transfer and Fluid Flow Characteristics of a Hydrogen Pulsating Heat Pipe with Medium Filling Ratio

A Review of Working Fluids and Flow State Effects on Thermal Performance of Micro-Channel Oscillating Heat Pipe for Aerospace Heat Dissipation

Experimental investigation on the ethane pulsating heat pipe under asymmetric heating

Contact Info

Product

Resources

About