Recently, the use of renewable energies has increased to  environmental pollution, limitation of fossil energy resources and energy security  One of the means that enable us to use such energies is fuel cells (FC). However, there are many problems  in the commercialization of FC from an economically and operation perspective. One of the most important problems is heat management. New heat pipes...

A fundamental study of the deposition and aging of a thin incipient wax-oil gel that is formed during the flow of waxy oils in cooled pipes was performed. The solubility of high molecular weight paraffins in naphthenic, aromatic or paraffinic sol®ents is ®ery low and decreases rapidly with decreasing temperature. This property of the paraffins leads to the formation of gels of complex morpholog...

Abstract Dry-hot rock is a kind of new geothermal energy with abundant storage. At present, the extraction dry-hot mainly through artificial fracturing mass by injecting water as working fluid. The heat extracted heat-carrying medium.This paper combines super-long gravity pipe rock, and buries carbon dioxide in Then, feasibility extracting from 2500m studied numerical simulation.The storage equ...

Abstract--In this work, an analytical and numerical study was carried out for the steady incompressible vapor and liquid flow in an asymmetrical flat plate heat pipe. The pseudo-three-dimensional analytical model employs the boundary layer approximation to describe the vapor flow under conditions including strong flow reversal and the method of matched asymptotic expansions to incorporate the n...

In karst systems, hydraulic conduits called solution pipes (or wormholes) are formed as a result of the dissolution of limestone rocks by the water surcharged with CO2. The solution pipes are the end result of a positive feedback between spatial variations in porosity in the rock matrix and the local dissolution rate. Here, we investigate numerically the effect of rock stratification on the sol...