Characteristic analysis of a photovoltaic system flying at fixed latitude

Lee, Shun Ching

doi:10.1016/j.enconman.2011.07.002

Cited by 5 publications

(5 citation statements)

References 12 publications

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“…One day trips along fixed longitude from the latitudes of 0˚, 30˚, and 60˚ are considered. As shown in [12], the surrounding temperatures at the altitude of 2.5 km are determined by the Lapse rate of o 9.8 C/km − , and the transmittance correction factors on three clear days, summer solstice (SS), autumn equinox (AE), and winter solstice (WS) are also shown [2]. According to Equation (1), the flying machine moving along fixed longitude with the velocity of 556.35 km/hr will come back 24 h later.…”

Section: One Day Tripmentioning

confidence: 99%

“…The average surrounding temperature on the first day of the year is equal to that on the last day. The surrounding temperature on the last day of the year is determined by the condition that the value on the day of WS derived from the interpolation is just equal to the value on the day of WS presented in [12]. Thus, the surrounding temperatures on any day can be found.…”

Section: One Year Tripmentioning

confidence: 99%

“…Some characteristics of the components in PVSC system are presented in [12]. At the initial state, the ECSC batteries all are at full state of charge except one secondary battery which is at the lowest fractional state,…”

Section: Pvsc Systemmentioning

confidence: 99%

“…where the correction factors 0 r , 1 r , and 2 r at the equator and at the latitudes of 30˚ and 60˚ has been shown by the author [12]. The diffuse transmittance for clear day, d τ , can be predicted by the empirical relationship [3] between the transmission coefficients for beam and diffuse radiation: …”

Section: Solar Radiationmentioning

confidence: 99%

“…But before being divided, the characteristics of the driven electric machinery must be indicated. The present DC motor used on the flying machine has the relationship between current and voltage [1] [8] According to the characteristics of ECSC [9]- [11], the charge and discharge characteristics for the present ECSC battery have been shown by the author [12]. The simultaneous solutions of characteristics of both ECSC battery and DC motor are 83.64 Vand −5.106 A [12].…”

Section: Ecsc Battery and DC Motormentioning

confidence: 99%

See 4 more Smart Citations

Application of Electrochemical Supercapacitor to Photovoltaic System on Unmanned Flying Machine

Lee¹,

Herlambang²

2014

SGRE

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This paper presents an analysis of the characteristics of the photovoltaic supercapacitor system that moving fixedly along the longitude. A lot of equations concerning the characteristics are considered including supercapacitor, direct motor, solar radiation from the sun to the photovoltaic module through the atmosphere. Runge-Kutta method is used to predict the time integrations, and Newton-Raphson method ensures the simultaneous solutions at each substeps. The machine flying takes one day trip or one year trip from different latitudes and different seasons. Around solar noon, the photovoltaic generator drives the direct current motor and charges the electrochemical supercapacitor simultaneously. An electrochemical supercapacitor battery is used as a secondary battery. The working ranges of electrochemical supercapacitor battery and direct current motor are found by the simultaneous solution of their characteristics. The thermostat system induces the excess currents and supplies heat energy to keep the photovoltaic module supercapacitor not below the ice point. This study shows the considerable benefits of the supercapacitor used for energy storage, and also finds a performance in which the presented photovoltaic supercapacitor system can continue working for about three and one half years on the trips from the equator and from the latitude of 30˚ and about four and one half years on the trip from the latitude of 60˚.

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Section: One Day Tripmentioning

confidence: 99%

Section: One Year Tripmentioning

confidence: 99%

Section: Pvsc Systemmentioning

confidence: 99%

Section: Solar Radiationmentioning

confidence: 99%