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A cost effective thermal storage system is required for the sustainable operation of parabolic trough solar power plants using synthetic oil as the heat transfer fluid in the solar field. Latent heat storage has the advantage of higher performance and lower material inventory. However, potential materials for use have low thermal conductivities leading to low utilization factors. The use of fins was...
Waste fish fats from Tunisian fish industry were pyrolyzed under nitrogen in a laboratory scale fixed-bed reactor. The pyrolysis was performed with a heating rate of 5°C/min from the ambient up to a final temperature of 500°C. In these conditions the main product is bio-oil (55 wt.%) while the co-products are syngas (44 wt.%) and bio-char (1 wt.%). The objective of this work is to characterize syngas...
Generally Separation techniques are one of the most important steps in the majority of chemical processes. However their performance depends greatly on the operating conditions of pressure, temperature, etc. which are not experimentally always available or easy to measure. Therefore it is important to have thermodynamics models capable to determine these conditions and particularly at phase equilibrium...
The application of phase change materials (PCMs) for solar thermal-energy storage capacities has received considerable attention in recent years due to their large storage capacity and isothermal nature of the storage process. This paper reports the results of an experimental investigation on the thermophysical properties of composites materials (Epoxy resin/metal tubes) filled with paraffin developed...
A 3D numerical model is proposed in this paper to simulate unsteady cavitating flows aroud hydrofoil NACA66mod. The Reynolds-averaged Navier-Stokes equations are solved for the mixture of liquid and vapor, which is considered as a single fluid with variable density. This variable is expressed as function of the vapor volume fraction. The closure of this variable is provided by the transport equation...
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