Nuevo México, Mexico
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Velumani S.,Av IPN and 2508 | Guzman C.E.,ITESM Campus Monterrey | Peniche R.,ITESM Campus Monterrey | Vega R.,SEISA
International Journal of Energy Research | Year: 2010

Distributed generation is becoming an attractive option for industrial and commercial scale customers. The main advantage of this on-site power generation is that it offers a more efficient, reliable and cost-effective power supply. In addition, waste heat can be used for local heating or cooling. This is known as cogeneration or combined heat and power (CHP). In the present work, a hybrid-CHP system for a 230kWe demand building is proposed and analyzed. The system considers the coupling of: A Solid Oxide Fuel Cell stack with an output of 200 kWe. A Microturbine with an output of 30 kWe. A single effect Absorption cooling system providing 55 kWt for air conditioning using water chillers. This plant would use natural gas as the primary fuel. The SOFC module is fed with the gas fuel and the whole stack generates the main power while acting as a combustor. The product gases exit the anode at a temperature of 900°C and are directly injected to the Micro Gas Turbine unit to produce additional power. Finally, the waste heat available at the turbine's exhaust fires a single effect Absorption Water-Chiller to provide cooling for air conditioning in the building. This proposed system would generate up to 230 kWe and 55 kWt with high thermal efficiencies of around 70-75%. Currently, Hybrid SOFC/GT and Microturbine/CHP systems are being considered or tested at several facilities. However, a combination of both, which would yield to trigeneration, has not been considered yet. Here we present a conceptual model based on specific proposals and investigations done by other researchers. A theoretical analysis on the proposed model is conducted to evaluate the potential and possibilities of such Hybrid CHP system and further discussions based on the economical considerations is also presented. © 2009 John Wiley & Sons, Ltd.


Aguilar-Rivera R.,Doctorado Tecnologias de Informacion y Comunicaciones | Valenzuela-Rendon M.,ITESM Campus Monterrey | Rodriguez-Ortiz J.,ITESM Campus Monterrey
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2013

In this article the possibility of saving evaluations during the running of the genetic algorithm is investigated. The study begins with the presentation of the concept on inheritance, already proposed in literature. The article develops further this idea with the addition of the concept of confidence, enabling the possibility of new schemes of inheritance, such as dynamic ones. The intuition of this enhancement is mathematically explored. The performance of the new schemes is compared via experimentation, leading to some interesting results. © Springer-Verlag 2013.


Beltran-Carbajal F.,Metropolitan Autonomous University | Valderrabano-Gonzalez A.,University of Guadalajara | Rosas-Caro J.C.,University of Guadalajara | Favela-Contreras A.,ITESM Campus Monterrey
Electric Power Systems Research | Year: 2015

An output feedback dynamic control scheme is proposed for efficient velocity trajectory tracking tasks for direct current (DC) electric motors. An asymptotic differentiation approach of signals is also introduced and applied for real-time angular acceleration estimation. The novel feature of this differentiator of signals is that it does not require any system mathematical model. Hence the presented differentiation approach admits a wide variety of practical applications in diverse electric power systems that require signal differentiation for their control and identification. The synthesis of the differentiation scheme considers the possible practical scenario of contaminated output signals with reasonably small noise. Some computer simulations results are included to show controller robustness to reject completely unknown chaotic load torque disturbances and parametric uncertainty, as well as effectiveness of the differentiation scheme of signals. © 2015 Elsevier B.V. All rights reserved.


Ahuett-Garza H.,ITESM Campus Monterrey | Aguiar F.,ITESM Campus Monterrey | Ponce V.,R and D JCI Power Solutions
Polymer Engineering and Science | Year: 2010

Dimensional control of injection molded products remains an important issue as applications require increasing precision. Accurate dimensions of a product result not only from well tuned manufacturing processes, but also from sound design and engineering analysis. This article introduces a model that predicts edge deformations of deep container walls. The model was developed using energy methods and predicts thermoelastic deformations caused by a drop in temperature once the part is released from the mold. The model was validated using results from FEA simulations as well as comparisons with field measurements of parts made of Polypropylene (PP). In general, good agreement was found. Material properties and process conditions were measured for the analyzed cases, which contributed to the accuracy of the results. © 2010 Society of Plastics Engineers.


Izaguirre A.R.,ITESM Campus Monterrey | Macias M.E.,ITESM Campus Monterrey | Martell F.,ITESM Campus AGS
12th Conference-Seminar: International School on Nonsinusoidal Currents and Compensation, ISNCC 2015 - Conference Proceedings | Year: 2015

Electric Arc Furnaces (EAF) are huge energy consumer. However due a limited power calculation the maximum electrical efficiency is not obtained. Most of the applications in market report the usage of non valid power quantities in EAF power control system. Because the extreme distortion conditions of power phenomena produced by the nonlinearity of the load in the EAF, the implementation of Current's Physical Components (CPC) power theory has the potential of describing more accurate the physical load conditions and the electric power phenomenon during the Heat Process. Each one of the current components proposed by CPC offer useful information of the load condition, and give indicators which can be useful as stability indicators of the process for a better identification of the EAF stage. © 2015 IEEE.


Villalpando R.,ITESM Campus | Munoz-Rodriguez D.,ITESM Campus Monterrey | Vargas-Rosales C.,ITESM Campus Monterrey | Rodriguez J.R.,ITESM Campus Monterrey
IEEE Communications Letters | Year: 2011

Position Location Information (PLI) is an enabler for a wide range of location based services. However, in ad hoc/sensor networks, PLI acquisition is difficult since conventional triangulation algorithms cannot be applied due to the lack of direct land fixed references. In this paper, a PLI acquisition algorithm suitable for multi-hop scenarios is formulated as a linear constrained search problem in a discretized space. Suitability is examined through analytic and simulation processes. © 2011 IEEE.


Beltran-Carbajal F.,Metropolitan Autonomous University | Valderrabano-Gonzalez A.,University of Guadalajara | Rosas-Caro J.C.,University of Guadalajara | Favela-Contreras A.,ITESM Campus Monterrey
ISA Transactions | Year: 2015

This paper presents an application of a nonlinear magnetic levitation system to the problem of efficient active control of mass-spring-damper mechanical systems. An output feedback control scheme is proposed for reference position trajectory tracking tasks on the flexible mechanical system. The electromagnetically actuated system is shown to be a differentially flat nonlinear system. An extended state estimation approach is also proposed to obtain estimates of velocity, acceleration and disturbance signals. The differential flatness structural property of the system is then employed for the synthesis of the controller and the signal estimation approach presented in this work. Some experimental and simulation results are included to show the efficient performance of the control approach and the effective estimation of the unknown signals. © 2015 ISA.


Rizo-Dominguez L.,CINVESTAV | Torres-Roman D.,CINVESTAV | Munoz-Rodriguez D.,ITESM Campus Monterrey | Vargas-Rosales C.,ITESM Campus Monterrey
IEEE Communications Letters | Year: 2010

Jitter is recognized as an important phenomenon that degrades the communication performance. Particularly, in real time services such as voice and video over the Internet, there is evidence that jitter departs from already proposed Laplacian models and that it has a heavy tail behavior. In this paper, we show that an Alpha-Stable jitter model is adequate, and that in some cases the Cauchy distribution provides a satisfactory approximation. Furthermore, this work shows how the jitter dispersion increases with the number of hops in the path, following a power law with scaling exponent dependent on the index of stability α. This allows us to predict the expected QoS in terms of the number of nodes and traffic parameters.i © 2010 IEEE.


Carrillo-Conde B.,Iowa State University | Garza A.,ITESM Campus Monterrey | Anderegg J.,Ames Laboratory | Narasimhan B.,Iowa State University
Journal of Biomedical Materials Research - Part A | Year: 2010

The in vitro adsorption of plasma proteins on polyanhydride microparticles based on sebacic acid (SA), 1,6-bis(pcarboxyphenoxy) hexane (CPH), and 1,8-bis(p-carboxyphenoxy)-3,6-dioxaoctane (CPTEG) was studied. Three model proteins from bovine serum (albumin (BSA), immunoglobulin G (IgG), and fibrinogen (Fg)) were used. The adsorption was studied using X-Ray Photoelectron Spectroscopy and gel electrophoresis. 2D electrophoresis was used to study the adsorption of plasma proteins from bovine serum. Differences in the amount of protein adsorbed were detected as a function of the following: (i) copolymer composition and (ii) specific protein studied. A direct correlation between polymer hydrophobicity and protein adsorbed was observed and higher quantities of Fg and IgG were absorbed. In vitro release studies were performed with ovalbumin-encapsulated microparticles that were incubated with Fg; these studies showed a reduction in the amount of ovalbumin released from the microparticles when Fg is adsorbed on the surface. An understanding of protein adsorption patterns on parenteral delivery devices is valuable in optimizing their in vivo performance. © 2010 Wiley Periodicals, Inc.


PubMed | ITESM Campus Monterrey, Metropolitan Autonomous University and University of Guadalajara
Type: | Journal: ISA transactions | Year: 2015

This paper presents an application of a nonlinear magnetic levitation system to the problem of efficient active control of mass-spring-damper mechanical systems. An output feedback control scheme is proposed for reference position trajectory tracking tasks on the flexible mechanical system. The electromagnetically actuated system is shown to be a differentially flat nonlinear system. An extended state estimation approach is also proposed to obtain estimates of velocity, acceleration and disturbance signals. The differential flatness structural property of the system is then employed for the synthesis of the controller and the signal estimation approach presented in this work. Some experimental and simulation results are included to show the efficient performance of the control approach and the effective estimation of the unknown signals.

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