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Proceedings ArticleDOI

Creation of artificial downdraft for wind power plant

TLDR
In this paper, a skyscraper sized hollow cylinder is used to tunnel down the natural downdraft created by cooling down the hot dry ambient air using evaporation cooling technique.
Abstract
The ground based wind energy extraction systems have reached almost their maximum capability. With the uncertainties related to wind like the variable wind directions and significant variation over shorter time scale has been a major hurdle in complete harnessing of this energy. The wind industry needs of revolutionary ideas to increase the capabilities of wind installation. This article suggests a revolutionary innovation of producing artificial wind of constant direction and controlled magnitude the constant and continuous wind from a single direction would make the wind turbines work longer span during a year there by producing a dramatic increase in power production. The artificial wind production works on same physics as convective downdraft in nature are produced. By definition, downdrafts are nothing more than areas of downward moving air. Their scale and intensity can vary driven by cooling due to melting and evaporation of precipitation, condensate loading, and pressure forces. A skyscraper sized hollow cylinder is used to tunnel down the natural downdraft created by cooling down the hot dry ambient air using evaporation cooling technique .as the air cools it become denser than outside air and falls down channelized by the tower at the speed up to (and above) 10m/sec. at the bottom this fast descending air is directed through wind turbines installed over the circumference of tower at base of the tower generating electricity. The magnitude of downdraft can be controlled by controlling its negative buoyancy and precipitation loading. Prime production time of artificial wind plants would be the daytime and evening during spring, summer and fall, thereby closely aligning with the electricity demand patterns. Additionally external vertical blade turbines would capture any wind blowing including cold winter months and night. At most optimised state the power generated is estimated to be approximately on an hourly basis, of approx. 500 megawatt hours, gross. Using a 70 percent capacity factor the Tower's potential hourly yield would be 350 megawatt hours from which, approximately 17 percent will be used to power its operations, yielding approximately 300 megawatt hours available for sale to the power grid.

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Journal ArticleDOI

Numerical simulation of solar wind energy towers

TL;DR: In this article, a numerical investigation is conducted to study the performance of solar wind energy towers, and the two-phase flow of air and water droplets in the tower is modeled following an Euler-Lagrange approach.
References
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Journal ArticleDOI

Renewable Energy: technology, economics and environment

TL;DR: In this article, a three-way approach for successful handling of the problem of waste heaps found along the streets of major cities in Nigeria is suggested. But, the problem is not limited to aesthetic considerations, but also includes inadequate enforcement of existing legislations, poor funding, lack of private participation, and poor facilities for proper waste management.
Journal ArticleDOI

A simple model of evaporatively driven downdraft: application to microburst downdraft

TL;DR: In this paper, the dynamics of a simple one-dimensional, time-dependent model of a downdraft are investigated, taking into account a distribution of drop sizes, modification of the drop size distribution by evaporation, entrainment of environmental air into the downdream, and explicit calculation of the intensity of the downdraught.
Journal ArticleDOI

A Similarity Theory for Unsaturated Downdrafts within Clouds

TL;DR: In this paper, a similarity theory is proposed to describe the properties of such currents; the use of similarity is defended on the basis of the observed and predicted scale of the downdrafts.
Journal ArticleDOI

Downdrafts within High Plains cumulonimbi. I - General kinematic structure

TL;DR: In this paper, the general kinematic structure of low-level precipitation-associated downdrafts associated with high- Plains precipitating convection is investigated, and the results from a comprehensive investigation in which observations from several case studies are integrated with three-dimensional cloud model results are presented.