J. Daniel Mena Baladés

• PhD
• Universidad de Cádiz

The main objective established in this work was to develop a model based on artificial neural networks (ANNs) to predict the corrosion status of stainless steel involved in biogas production, analyzing the influence of the material composition and the breakdown potential value. To achieve this objective, an ANN model capable of predicting the corro...

An improvement of a formerly proposed CFD-based methodology (base model) for the estimation of water evaporation rate in swimming pools is presented here. This base model achieved satisfactorily on average (10% of relative error) under mixed and natural convection, but it deviated from the experimental measurements significantly (up to 45%) for con...

Stainless steel has proved to be an important material to be used in a wide range of applications. For this reason, ensuring the durability of this alloy is essential. In this work, pitting corrosion behaviour of EN 1.4404 stainless steel is evaluated in marine environment in order to develop a model capable of predicting its pitting corrosion stat...

The calculation of sunlit surfaces in a building has always been a relevant aspect in building energy simulation programs. Due to the high computational cost, some programs use algorithms for shading calculation for certain solar positions after discretization of hemispherical sky. The influence of the level of discretization on the estimation of i...

Building energy simulation programs are powerful tools which are increasingly used at the design stage, for the assessment of compliance with energy efficiency regulations and for integration into energy management systems. A wider scope, a higher level of detail of building and thermal systems and the trend towards the use of dynamic simulations i...

This paper proposes a practical solution to the problems arising when the conduction transfer function (CTF) method is applied to solve the 1D transient component of heat transfer in the internal zone of ground-coupled floors. The lower boundary condition for these problems must be imposed at a depth of several metres. The proposed method is based...

A simplified model to simulate single U-tube ground heat exchangers is presented in this paper. The model is based on the electrical analogy to simulate heat transfer within the borehole and the use of thermal response factors (g-functions) to estimate injection–extraction heat flow to surrounding ground. The inclusion of two capacities for the hea...

The ground-coupled heat transfer in buildings is a complex, transient and multidimensional problem. There have been many studies focused to obtain the heat flux in slab and basement foundations. Most of them include the multidimensional effects occur at the perimeter however there are situations in which the heat transfer is mainly one-dimensional....

Policies for energy saving and carbon dioxide emission reduction have enouraged the use of efficient technologies in building thermal conditioning, like geothermal source heat pumps [. Most of the thermal models used to simulate the performance of vertical ground heat exchangers do not consider the effect of outer weather conditions, except for the...

Resumen El presente artículo pretende mostrar un cambio en la metodología de la asignatura de Materiales II en el grado de Ingeniería Civil. El objetivo es introducir el desarrollo de seminarios prácticos que permitan dar a conocer al alumno la potente herramienta de las técnicas de modelado. El trabajo colaborativo se presenta como metodología apl...

Resumen En este trabajo se presenta un método que favorece la formación multidisciplinar en el primer curso del Grado en Ingeniería Civil de la Escuela Politécnica Superior de Algeciras, de la Universidad de Cádiz. Dicho método utiliza conceptos aprendidos en la asignatura de Fundamentos de Informática como herramienta para solucionar aspectos que...