Jesús M. Blanco

Diagnosing steam production systems on their multivariable steady states

Abstract Being measurements in time series the primary data source, a systematic methodology for operational diagnosis in short- and long-term is introduced. It is aimed to boilers for cogeneration in industrial power plants such as, pulp and paper mills, nickel processing and sugar cane factories and for electricity production in thermal power plants. To identify Multivariable States Steady is the main root for whatever variants for data preprocessing and processing. Backgrounds from different disciplines have been harmonically integrated. As example, a development on existing steam generators brought. It means, each methodologys implementation represents, in fact, an innovative and silent technology for environmental regulations meeting and energy saving in industry.

Incremento de la Eficiencia en Centrales Termoeléctricas por Aprovechamiento de los Gases de la Combustión

This paper presents a proposal for using the latent heat of the steam condensed in an economizer used to preheat the feeding water to the steam generator, with the aim of increasing the efficiency of thermal power plants. A novel methodology applied to power plants producing over 350 MW power plants and that use natural gas is developed. Also, a detailed study of the different alternatives proposed is presented and their direct effects on the economic feasibility have been evaluated. Increases up to 0.6 % in the global efficiency are obtained, besides short return investment periods, depending on the annual effective working hours of the power plant.

New Simplified Algorithm for the Multiple Rotating Frame Approach in Computational Fluid Dynamics

BCAM-BALTOGAR CFD Platform for Turbomachinery Simulation and Design (BFA/DFB - 6/12/TK/2012/00020)

A METHOD FOR ASSESSING CREATIVITY AND INNOVATION OF INDUSTRIAL PRODUCTS BY ENGINEERING STUDENTS

In this paper experiences about the implementation of creative activities in industrial engineering degrees are related. These activities were used in engineering courses to improve the creative skills of the students. Thus, the main goal was to make them capable to design innovative products using ideation methods and working in groups. Although there are some works in the literature about the implementation of creative methods in engineering degrees none of them have established well defined approaches which are able to assess the creativity and innovation level of products in an effective way. Indeed, one of the main problems that have been found by instructors during the classes is how students can evaluate their own creative solutions and the degree of innovation of the designed products. There are no many works in the literature focusing in this topic and all of them have been developed to be applied by engineers with long experience in design. These methods measure the innovation of products by the quantification of a number of factors. However, these factors present some difficulties for students who are not used to work with them. In fact, one of the main problems found by instructors in implementing creativity procedures at university level is that students do not have enough experience about the assessment of engineering products and their degree of innovation. This paper describes a new procedure for the measurement of the level of creativity that new ideas provide. It can be also used for the measurement of the innovation of products. A case study is presented to illustrate the method and evaluate its effectiveness. In this activity an engineering design problem is proposed to the students and they have to find the best solution. Brainstorming is used as idea generation method and they have to measure their creativity using the proposed approach. The main advantage of the method is that it can be easily used by students and instructors. In this way the students can evaluate their own ideas in order to sort them and select the most creative ones. The method works with a three dimensional scale which are level, scope and goals. The comparison of the proposed method with other existing approaches allows highlighting the easier understanding of the factors to be evaluated.

Efficient Rotating Frame Simulation in Turbomachinery

This paper deals with the simulation of steady flows in turbomachinery. Two approaches are proposed, the first one is the classical multiple-rotating frame method (MRF) by multizone approach where the different zones are separated by nonoverlapping interfaces and solved independently. Since each zone is loaded separately, a transferring system should be properly implemented at the interface boundaries. Two techniques are considered, in the first one the conservative variables are interpolated between zones while in the second one the fluxes are transferred through the interfaces. The other proposed approach is a new version of the MRF using a virtual interface (VMRF). This is a simplified of the previous one where the interfaces are created virtually at the solver level, rendering the method easy to implement especially for edge-based numerical schemes, and avoiding any re-meshing in case one needs to change interface position, shape or simply remove or add new one. Finally, numerical tests are performed to demonstrate the efficiency of the proposed methods by comparison with commercial codes (ANSYS FLUENT).

Obtención del Valor Real de las Pérdidas de Difícil Evaluación, Aplicables al Cálculo del Rendimiento de Calderas

Se presenta un estudio para la obtencion del valor real de las perdidas de dificil evaluacion aplicables al calculo del rendimiento de calderas. A las perdidas de dificil evaluacion se les adjudico un valor convencional del 1 % sobre el poder calorifico superior del combustible utilizado. El metodo propuesto permite determinar con exactitud dichas perdidas y esta indicado para cualquier tipo de combustible. Para el estudio, se han seleccionado el gas natural y el fuel-oil (fuel no 2 y fuel de bajo indice de azufre respectivamente). El valor convencional del 1% sobre el poder calorifico superior ha sido muy util para la comparacion de rendimientos en calderas como se muestra en este trabajo.