Abstract To design a green energy-saving heating pipe, this paper studied the structural transformation of pipe and carried out effect simulation analysis. The key is to add an impeller device inside ordinary convert part kinetic energy fluid in into mechanical impeller. generated by rotation can be transferred through gears, connecting rods, other components converted heat for recovery boiler ...

For the assessment of thermal performance heat pipes, a wide range modeling is available in literature, ranging from simple capillary limit analyses to comprehensive 3D models. While simplistic models may result less accurate predictions transfer and operating temperatures, be computationally expensive. In this study, universal computational framework developed for fast but sufficiently traditi...

In this study a polypropylene material with talcum reinforcement used for sewer pipes has been subjected to an annealing procedure at 80°C, roughly 60°C above the actual application temperature, in air for a time period of 18 months. As expected, examination of the material showed no significant decrease in mechanical or fracture mechanical properties due to the temperature exposure. However, s...

On-line spray water cooling (OSWC) of electric-resistance-welded (ERW) steel pipes can replace the conventional off-line heat treatment process and become an important and critical procedure. The OSWC process improves production efficiency, decreases costs, and enhances the mechanical properties of ERW steel pipe, especially the impact properties of the weld joint. In this paper, an annular OSW...

When designing satellites, one of the major issues aside for designing its primary subsystems is to devise its thermal. The thermal management of satellites requires solving different sets of issues with regards to modelling. If the satellite is well conditioned all other parts of the satellite will have higher temperature no matter what. The main issue of thermal modelling for satellite design...

Isothermal journal bearings have been developed by incorporating heat-pipe cooling. The heat pipe assists in spreading heat rapidly along the bearing circumference, resulting in a very small temperature gradient, low peak temperature, and stable transient thermal behavior. This paper presents a model for the isothermal journal bearings and the results of analyses. The heat pipe in the isotherma...

The direct numerical simulation (DNS) of heat transfer in a fully developed turbulent pipe flow with for various Prandtle numbers are performed to obtain statistical quantities such as turbulent heat flux, and temperature variance. Main emphasis is placed on Prandtl number effects on turbulent heat transfer in pipe flow. Probability density functions and joint probability density functions of v...

In this study, in order to increase the heat transfer rate in concentric double-pipe heat exchangers by an active method, a rotating ball valve was mounted downstream of the outer pipe end and used as a pulse generator. In the experimental set-up, hot water (40-70 °C) was passed through the inner pipe with fixed mass flow rate (Reynolds number ≈ 10,200) while cold water was passed through the a...