Nomenclature


Author details

, Zhenyu Liu<sup>2</sup>

Thermodynamic Analysis of Wind Energy Systems DOI: http://dx.doi.org/10.5772/intechopen.85067

\*Address all correspondence to: liuzy@zju.edu.cn

provided the original work is properly cited.

\* and Jianrong Tan<sup>2</sup>

1 School of Mechanical Engineering, Zhejiang University, Hangzhou, P.R. China

2 State Key Laboratory of CAD & CG, Zhejiang University, Hangzhou, P.R. China

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

Weifei Hu1

19

Thermodynamic Analysis of Wind Energy Systems DOI: http://dx.doi.org/10.5772/intechopen.85067

Nomenclature

A rotor swept area CP power coefficient

Wind Solar Hybrid Renewable Energy System

Ek kinetic energy Ex exergy

Exki kinetic exergy Expo potential exergy Exph physical exergy Exch chemical exergy

m mass

vapor

f PDF of meteorological variables

P wind power/wind pressure

U 10-m horizontal wind speed

data set

tions, Version 2

PMDD permanent magnet direct-drive WTs/WT wind turbines/wind turbine

NASA National Aeronautics and Space Administration

set

Wwind total input wind energy η energy efficiency ψ exergy efficiency ρ air density [kgm<sup>3</sup>

V wind speed

18

cp, cp,a, cp,v specific heat of flow, specific heat of air, specific heat of water

P0, P1, P2, Pave, p reference pressure, inlet pressure, outlet pressure, average

T0,T1,T2,Tave reference temperature, inlet temperature, outlet temperature, and average temperature, respectively T10M 10-m air temperature retrieved from the MERRA-2 data set

U10M 10-m eastward wind speed retrieved from the MERRA-2 data

V10M 10-m northward wind speed retrieved from the MERRA-2

] ω0/ω humidity ratio of air at the reference state/at the current state MERRA-2 Modern-Era Retrospective Analysis for Research and Applica-

PS surface pressure retrieved from the MERRA-2 data set QV10M 10-m specific humidity retrieved from the MERRA-2 data set

Ra, Rv gas constant and water vapor constant, respectively

pressure, and wind pressure in humid air, respectively
