The simplicity of solar chimney power plant (SCPP) makes it very attractive for generation. This paper investigates the technical feasibility using a locally-produced plastic film (Low-Density Poly-Ethylene “LDPE”) as collector cover. idea is to combine low-cost material with simple solution. As LDPE subject deterioration, effect aging on initial properties used analyzed. Natural was privileged...

As part of a survey of Hi λ21-cm emission in the Southern Milky Way, we have detected two large shells in the interstellar neutral hydrogen near l = 279. The center velocities are +36 and +56 km s, which puts the shells at kinematic distances of 7 and 10 kpc. The larger shell is about 610 pc in diameter and very empty, with density contrast of at least 15 between the middle and the shell walls....