The design of advanced control systems to optimize the overall performance of Parabolic Trough Collectors solar plants with Direct Steam Generation is currently a priority research line at PSA-CIEMAT. The development of dynamic models for use in simulation and control of this type of solar power plant is presented in this article, focused on the DISS experimental solar plant. The developed mode...

the use of solar collectors in combination with heat pipes is rapidly growing in recent years.heat pipes, as heat transfer components, have undeniable advantages in comparison with other alternatives. the most important advantage is their high rate of heat transfer at minor temperature differences. although there have been numerous studies on the heat analysis or first thermodynamic analysis of...

In this chapter we consider reduced basis approximation and a posteriori error estimation for linear functional outputs of affinely parametrized linear and non-linear parabolic partial differential equations. The essential ingredients are Galerkin projection onto a low-dimensional space associated with a smooth “parametric manifold” — dimension reduction; efficient and effective Greedy and POD-...

Solar-driven photoactivated processes have proven to be effective technologies for removing pathogens and chemical contaminants from water. Reflector systems are commonly used concentrate the sunlight improve their efficiency. Among them, compound parabolic collectors (CPC) most widely used, being concentration factor (CF), main design parameter, calculated directly geometry. This work presents...

Solar energy is sufficient source of for a solar-rich country like Pakistan to meet its needs. The thermal technologies such evacuated tube, flat plate, and compound parabolic trough collectors being used all around the world. However, type ofitheiworkingifluidihaveiaisignificantimpact onitheiperformanceiofithese collectors. use high conductivity nanofluids increase performance solar very smart...

In this study, a numerical examination of the significance of rotation and changeable gravitational field on the start of nanofluid convective movement in an anisotropic porous medium layer is shown. A model that accounts for the impact of Brownian diffusion and thermophoresis is used for nanofluid, while Darcy’s law is taken for the porous medium. The porous layer is subjected to uniform rotat...

A class of generalized approximate inverse finite element matrix algorithmic methods for solving nonlinear parabolic and elliptic PDE’s, is presented. Fully parameterized singularly perturbed non-linear parabolic and elliptic PDE’s are considered and explicit preconditioned generalized conjugate gradient type schemes are presented for the efficient solution of the resulting nonlinear systems of...