Browsing Mechanical Engineering by Issue Date
Now showing items 1-20 of 50
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Preliminary Wind Turbine Assessment Using Urban Scaling Factors in Puerto Rico
(Polytechnic University of Puerto Rico, 2012)Abstract - It is well known that wind energy applications are most effective in wide open areas. As shown in the literature, rather than completely discard the location of wind turbines in urban areas, the reduction in ... -
Thermal Diffusivity of a Single Crystal Silicon Wafer n-type Doped with Manganese
(Polytechnic University of Puerto Rico, 2012)Abstract - The thermoelectric-silicon based material is gaining enormous interest since silicon is abundant and cheap. The thermoelectric materials operate in direct conversion from heat to electrical energy with no mobile ... -
Analysis and Characterization of the Condenser of a Small Scale Solar Air Conditioning Unit
(Polytechnic University of Puerto Rico, 2012)Abstract - This work is intended to show the characterization of a flat plate heat exchanger used as the condenser of a small scale solar air conditioning system and the recommendations for future studies. Also show flat ... -
An Application of Project Management Methodology for the Development of an Advance Identity Product within Budget and On Time Delivery
(Polytechnic University of Puerto Rico, 2012)Abstract - In an Advanced Identity Management Technology Company the purpose is to create solutions to identifying individuals in a system (such as a country, a network, or an enterprise) and controlling their access to ... -
Development of an Open Source Tool for the Preliminary Structural Design of a Small Wind Turbine Based on National and International Standards
(Polytechnic University of Puerto Rico, 2013)Wind energy have proven to be a viable option in the production of electricity. The benefits from wind energy sources include reductions in greenhouse gas emissions, water conservation and the diversification of the ... -
Parallel Plates Internal Heat Transfer Analysis for Electronic Cooling
(Polytechnic University of Puerto Rico, 2013)Two-dimensional heat transfer analysis using the Integral Equation Method between a series of parallel plates with uniform surface heating to determine the Temperature Distribution as a Thermal Model for a Supercomputer ... -
Wind Blade Composite Design, Manufacturing and Experimental Testing
(Polytechnic University of Puerto Rico, 2013)The design and manufacture of composite material sandwich type blade is presented. Stainless steel rods and ribs, are the internal structure, core is foam, between ribs. The skin is a laminate of fiber glass and a ... -
Free Convection Fresnel Lenses Concentrator
(Polytechnic University of Puerto Rico, 2013)This project involves an evaluation of an improved Fresnel lenses solar energy concentrator. Its innovation consists of preventing forced convection heat losses at the receiver area. Heat losses by convection and by ... -
Crack Growth in Compressive Stress Fields
(Polytechnic University of Puerto Rico, 2013)To understand how to analyze Damage Tolerance in an aerospace component loaded in compression one must first obtain correct Fatigue Crack Growth curves. Once the fatigue data curves are correct one could then move forward ... -
Parametric Study of Lift-Drag Coefficients vs. Geometric Parameters of Axial Compressor/Turbine for Flow Blade Interactions
(Polytechnic University of Puerto Rico, 2013)This project is a parametric study of the Lift-Drag coefficients from blade hub to tip radius of Axial Compressor/Turbine for flow blade interactions. The study contemplates the effect of Lift and Drag forces varying ... -
Analysis and Application of Maxwell's Equation for Induction Heating
(Polytechnic University of Puerto Rico, 2013)This article involves the development of the Maxwell equations considering a induction heating system. It is analyzed by computer program "Ansys Maxwell," to observe the development of the magnetic field. The system ... -
Aircraft Wing Spanwise Air-Load Distribution using MATLAB
(Polytechnic University of Puerto Rico, 2014)Aircraft design is a complex task that involves the interaction between aerodynamics, propulsion, flight mechanics and structures. In particular, the structural design tasks involve the consideration of a significant ... -
Surface Response Modeling for Rotor-Dynamics Systems
(Polytechnic University of Puerto Rico, 2014)This paper presents the way to generate an equation that does not exist, to analyze different rotor-dynamics system. With the analysis and design software, the results desired were obtained in order to be able to create ... -
Stirling Engine Mechanism Analysis as a Function of Internal Pressure Variation
(Polytechnic University of Puerto Rico, 2014)The Stirling heat engine was conceived in the in the early 1800's as an alternative to the steam engine. It is a regenerative close-cycle engine which utilizes the expansion and contraction of a working fluid at different ... -
3D Vibration Isolation Systems Modeling for Air Handling Units
(Polytechnic University of Puerto Rico, 2014)Spring isolators systems are commonly used in a variety of ways in today’s construction industry. They are an essential part of the design of many mechanical systems that are in need of absorbing and dissipating unwanted ... -
Data Center Design and Airflow Management (Insight into Increasing Performance and Efficiency)
(Polytechnic University of Puerto Rico, 2015)The formation of hot spots in data centers is usually caused by the inability to properly distribute the airflow and not for the lack of capacity by the cooling system. Airflow management is essential to reduce the ... -
Airfoil Design Using Blade Element Momentum Theory
(Polytechnic University of Puerto Rico, 2015)A wind turbine is a device designed to extract kinetic energy from the wind and convert it to mechanical energy, which in turn can be equivalent to electric power. On this work we will focus on the aerodynamics of wind ... -
A Quadcopter Test Bed for Academic and Research on Control Systems Design
(Polytechnic University of Puerto Rico, 2015)This article presents the development of a quadcopter platform to be used for future academic and research studies in control systems in the Mechanical Engineering Department at the Polytechnic University of Puerto ... -
Central Water-Cooled Chill Water Plant
(Polytechnic University of Puerto Rico, 2015)A medical device facility in the island needs to determine the feasibility of replacing the existing air-cooled chilled water system at their main plant with a more efficient water-system in order to reduce the electric ... -
CFD Study to Analyze the Behavior of Secondary Flow Using Fillets
(Polytechnic University of Puerto Rico, 2015)Secondary flow are a series of vortex created at the leading edge of the blade. These vortexes decrease the efficiency of the turbine by creating a non-uniform flow which will pass to successive blade stages. The ...