An Airship Design Methodology Based on Available Solar Energy in Low Stratosphere

2010 ◽  
Author(s):  
Antonio Dumas ◽  
Michele Trancossi ◽  
Stefano Anzillotti
Keyword(s):  
High Altitude ◽  
Cell System ◽  
Power Supplies ◽  
Hydrogen Energy ◽  
Oxygen Production ◽  
Energy Supply System ◽  
Standard Atmosphere ◽  
High Altitude Platforms ◽  
Energetic Balance ◽  
Gas Cylinders

The actual applicative research concerning airships and their use as HAP (High Altitude Platforms for telecommunications and military use) presents new applicative hypothesis of these systems, also concerning energetic high quote production. Authors present the energetic balance of a high quote photovoltaic platform with capability of static hovering realized by electric powered propellers. This is the first step trough the design of the P. S. I. C. H. E. (Photovoltaic Space Island for Conversion of Hydrogen as Energy vector) airship concept: a stratospheric airship which could be considered a platform for hydrogen and oxygen production by photovoltaic. It investigates the behaviour of a similar platform operating at altitudes between 10 and 20 km, positioned at 45° latitude north [1, 2]. This paper analyses the design process for a High Altitude Platform based on photovoltaic energy caption, but the process could be generalized in order to be applied to any airship project. It is considers airship shapes equipped with large PV array that covers energy request during the day. Surplus in power supplies electrolyser equipments for hydrogen and oxygen production from water, which could be captured by atmospheric humidity or brought by an auxiliary airship. Hydrogen and Oxygen are compressed and stored in gas cylinders. With insufficient solar irradiance, with severe wind conditions and during the night, a fuel cell system fed by hydrogen and oxygen tanks supplies power requirements. The Standard Atmosphere Model is used to evaluate PV performance at various operative altitudes. A propulsion system with electric motors grants airship manoeuvrability and hovering. Energy balance of PV-hydrogen energy supply system has been analyzed for three airship shapes with equal volume with concern of overabundant hydrogen and oxygen production. Total weight and payload are calculated in relation to altitude. Storage tanks dimensions and products ground transportation frequency has been estimated. Hydrogen annual production for PV square meter has been evaluated in relation to ground production at the same latitude.

Broadband from heaven [high altitude platforms]

2004 ◽  
Vol 2 (2) ◽  
pp. 18-23 ◽  
Author(s):  
S. Karapantazis ◽  
F.N. Pavlidou
Keyword(s):  
High Altitude ◽  
High Altitude Platforms

scholarly journals A Super-Green Factory: The Sharp Kameyama Plant

MRS Bulletin ◽  
2008 ◽  
Vol 33 (4) ◽  
pp. 456-458
Author(s):  
Tetsuo Kusakabe
Keyword(s):  
Large Scale ◽  
Liquid Crystal Display ◽  
Evaluation Criteria ◽  
Cell System ◽  
Production Equipment ◽  
Environmental Friendliness ◽  
Power Sources ◽  
Energy Supply System ◽  
Cogeneration System ◽  
Environmental Measures

Sharp Corporation is making a concerted effort to reduce environmental impacts to the greatest extent possible at its production facilities around the world, and it is applying its own original evaluation criteria to recognize those plants having an extremely high level of environmental performance as “SuperGreen Factories.”Our Kameyama plant, the frst such factory to be so recognized, is an integrated, start-to-fnish production facility for liquid-crystal display (LCD) televisions (TVs), from fabricating the LCD panel to assembling the fnished TV set (see Table I). Given that large amounts of energy are consumed to operate production equipment and to power air conditioning, we focused particular attention on environmental measures intended to reduce global warming and introduced an energy supply system that combines environmental friendliness and operational stability. As shown in Figure 1, this system is based on integrating different types of large-scale distributed power sources and consists of a gas-fred cogeneration system, a fuel cell system, and a photovoltaic power generating system. The power output of this system covers about one-third of the total electrical needs of the plant.

scholarly journals Advanced Communication Techniques and Applications for High-Altitude Platforms

2008 ◽  
Vol 2008 (1) ◽  
Author(s):  
Abbas Mohammed ◽  
Shlomi Arnon ◽  
David Grace ◽  
Marina Mondin ◽  
Ryu Miura
Keyword(s):  
High Altitude ◽  
Communication Techniques ◽  
High Altitude Platforms

scholarly journals GEOMETRICAL ANALYSIS OF HIGH ALTITUDE PLATFORMS CELLULAR FOOTPRINT

2007 ◽  
Vol 67 ◽  
pp. 263-274 ◽  
Author(s):  
Moawad Ibrahim Dessouky ◽  
Hamdy A. Sharshar ◽  
Yasser Attia Albagory
Keyword(s):  
High Altitude ◽  
Geometrical Analysis ◽  
High Altitude Platforms

scholarly journals Pengaruh Penggunaan Jenis Modulasi Sistem HAPS pada Layanan DVB-T

Elkawnie ◽  
2016 ◽  
Vol 2 (2) ◽  
pp. 177
Author(s):  
Sri Wahyuni
Keyword(s):  
High Altitude ◽  
Digital Video ◽  
Digital Video Broadcasting ◽  
Video Broadcasting ◽  
High Altitude Platforms

DVB-T (Digital Video Broadcasting- Terresrial) merupakan sebuah standar terbuka dalam transmisi video digital yang telah diakui secara internasional dikeluarkan oleh ETSI. Pada penelitian ini akan menganalisis pengaruh pemilihan jenis modulasi yang digunakan terhadap performansi layanan DVB-T pada sistem High Altitude Platforms Station (HAPS). HAPS yang dikenal sebagai stratospheric broadband adalah sebuah standar infrastruktur telekomunikasi yang serupa dengan satellite, yang ditempatkan di lapisan stratosfer. HAPS dikembangkan untuk menjalankan layanan serupa satellite dengan biaya yang lebih hemat, waktu perealisasian yang jauh lebih pendek dan memiliki cakupan yang jauh lebih besar dibandingkan dengan infrastuktur terestial saat ini. Kanal HAPS dapat menyediakan hubungan LOS antara platform HAPS dengan user sehingga dapat disimulasikan dengan kanal rician. Berdasarkan hasil penelitian, performansi layanan DVB-T pada sistem HAPS dipengaruhi oleh jenis modulasi dan mode kerja yang digunakan, penggunaan modulasi QPSK dengan mode kerja 8K memberikan performansi paling baik, dengan memenuhi nilai BER yang telah ditentukan yaitu lebih kecil dari 10-4

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