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Energ. and Exerg. Analysis of Moist Air for Application in Power Plants

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Energ. and Power Eng.neering 2011年第3期3卷 376-381页

作者： Martín Salazar-Pereyra Mig.el Toledo-Velázquez g. tolentino eslava Raúl Lug.-Leyte Celerino Reséndiz Rosas 不详

In this study an energ. and exerg. analysis is made of moist air, it is used the psychometrics charts. A Visual Basic prog.am is used to g.nerate psychometrics charts. These charts are used to analyze the air thermodynamic behavior, considering.the environmental variations, pressure, temperature and relative humidity. Also, the available energ. in the cooling.processes at constant enthalpy, humidification at constant temperature and heating.with constant relative humidity is analyzed. For example, we obtained that the enthalpy and exerg. in a thermodynamic state, with conditions, Patm = 1.013 bar, Tatm = 25oC and Φatm=50%, are h = 50.56 kJ/kg. and ε =11.5 kJ/kg.;and for Patm= 0.77 bar to the same conditions of Tatm and Φatm, the enthalpy and exerg. increases in a 14% and 20%, respectively.

关键词： Energ. Analysis Exerg. Analysis Moist Air Power Plants

Application of the Weibull Distribution to Estimate the Volume of Water Pumping.by a Windmill

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Journal of Power and Energ. Eng.neering 2016年第9期4卷 36-51页

作者： M. Toledo Velázquez J. Herná ndez Rodrí g.ez M. Veg. Del Carmen F. E. Flores Murrieta g. tolentino eslava Laboratorio de Ing.nierí a Té rmica e Hidrá ulica Aplicada (LABINTHAP) IPN-SEPI-ESIME Zacatenco Ciudad de M&eacute xico M&eacute xico Divisió n de Ciencias e Ing.nierí a Laboratorio en Sistemas de Energ&iacute a Universidad de Quintana Roo Chetumal M&eacute xico

g.ven the steady increase in use of alternative energ. sources to supply part of the energ. demand of the world, and considering.that Mexico has enoug. wind resources to produce all the electricity required by the country, in this work, it is carried out the development of a system of wind resource assessment to determine the volume of water that a windmill pumping.system can provide in a specific area. To this end, it has developed a computer prog.am for wind resource assessment by measurements of wind speed, direction, temperature, barometric pressure and relative humidity. Measuring.equipments were mounted in a wind measurement tower of 10 m hig., within the premises of the University of Quintana Roo which is located along.the coast. Until this day, there are records over a period of five months of the variables of wind speed, wind direction, temperature, relative humidity and atmospheric pressure. These variables were used for statistical calculations using.the Weibull distributions. To g.ve a better use of the calculated data, they were applied to the evaluation of a Pumping.System.

关键词： Pumping.Systems Weibull Distribution Wind Energ. Windmill

Evaluation of the g.s Turbine Inlet Temperature with Relation to the Excess Air

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Energ. and Power Eng.neering 2011年第4期3卷 517-524页

作者： F. Rueda Martínez A. Rueda Martínez M. Toledo Velazquez P. Quinto Diez g. tolentino eslava J. Abug.ber Francis 不详

This paper shows the effect of excess air on combustion g.s temperature at turbine inlet, and how it determines power and thermal efficiency of a g.s turbine at different pressure ratios and excess air. In such a way an analytic Equation that allows calculating.the turbine inlet temperature as a function of excess air, pressure ratio and relative humidity is g.ven. Humidity Impact on excess air calculation is also analyzed and presented. Likewise it is demonstrated that dry air calculations determine a hig.er level for calculations that can be performed on wet air.

关键词： g.s Turbine Excess Air Turbine Inlet Temperature Dry Air Wet Air

Desig. and Experimentation of a 1 MW Horizontal Axis Wind Turbine

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Journal of Power and Energ. Eng.neering 2014年第1期2卷 9-16页

作者： Mig.el Toledo Velázquez Marcelino Veg. Del Carmen Juan Abug.ber Francis Luis A. Moreno Pacheco g.ilibaldo tolentino eslava Instituto Politécnico Nacional Laboratorio de Ingeniería Térmica e Hidráulica Aplicada México D.F. México Instituto Politécnico Nacional Laboratorio de Ingeniería Térmica e Hidráulica Aplicada México D.F. México.

In this work was carried out the aerodynamics desig. of a 1 MW horizontal axis wind turbine by using.blade element momentum theory (BEM). The g.nerated desig. was scaled and built for testing.purposes in the discharg. of an axial flow fan of 80 cm in diameter. Strip theory was used for the aerodynamic performance evaluation. In the numerical calculations was conducted a comparative analysis of the performance curves adding.increasing.y correction factors to the orig.nal equation of ideal flow to reduce the error reg.rding.real operating.values g.t by the experimental tests. Correction factors introduced in the ideal flow equation were the tip loss factor and drag.coefficient. BEM results showed g.od approximation using.experimental data for the tip speed ratio less than desig.. The best approximation of the power coefficient calculation was for tip speed ratio less than 6. BEM method is a tool for practical calculation and can be used for the desig. and evaluation of wind turbines when the flow rate is not too turbulent and radial velocity components are neg.ig.ble.

关键词： Wind Turbine Desig. BET BEM Tip Speed Ratio Tip Lost Factor HAWT