Category: Solar Energy 5

Concept design

1.1 Tethered aerostat For an aerostat to support PV devices, this has to be able to produce enough lift via its buoyancy to overcome its weight, the weight of the solar cells plus any control system and that of the tether, still leaving enough margin to produce an appropriate tension in the tether to avoid […]

High altitude winds

The knowledge of the mean wind speed at a certain altitude (and its statistical properties) is essential to calculate the aerodynamic forces acting on the aerostat and in particular to determine the forces along the mooring cable. The wind speed data described in this section were provided by the Natural Environment Research Council (NERC), from […]

High altitude solar radiation

The first step in the development of the ASPG concept is to evaluate how much solar energy is available as a function of altitude. This allows a direct assessment of the potential of the ASPG when compared to an equivalent ground based system. This section presents a set of calculations to enable this comparison and […]

Aerostatic platforms

Lighter-than-air craft (aerostats) have been progressively neglected by the main stream research in Aerospace Engineering during the second half of the past century after having made remarkable technological progress that culminated in the 1930’s with the construction of over 200m long airships (Dick & Robinson, 1992, Robinson, 1973). There have been some developments of historical […]