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Now showing items 11-20 of 41
The influence of cross-winds on the performance of natural draft dry-cooling towers.
(Stellenbosch : University of Stellenbosch, 1992-12)
The effect of cross-winds on the performance of natural draft dry-cooling towers is studied by
means of isothermal model tests, a numerical simulation and full scale measurements. The
action of the wind on such towers ...
Rock bed thermal storage for concentrating solar power plants
(Stellenbosch : Stellenbosch University, 2014-04)
ENGLISH ABSTRACT: Concentrating solar power plants are a promising means of generating electricity. However, they are dependent on the sun as a source of energy, and require thermal storage to supply power on demand. At ...
Losses in the inlet section of counterflow wet-cooling towers
(Stellenbosch : Stellenbosch University, 1998-12)
ENGLISH ABSTRACT: The flow resistances in the inlet sections of counterflow wet-cooling towers are investigated and
correlations are derived for inclusion in a one-dimensional tower performance model.
The rain zone loss ...
Evaluation of natural draught wet-cooling tower performance uncertainties
(Stellenbosch : Stellenbosch University, 2007-03)
ENGLISH ABSTRACT: A natural draught wet-cooling tower (NDWCT) was modelled using the Merkel method with an
improved energy equation as recommended by Kloppers and Kroger (2005a) - referred to as the
Improved Merkel ...
Performance evaluation of a solar chimney power plant
(Stellenbosch : University of Stellenbosch, 2000-12)
A solar chimney power plant consists of a central chimney that is surrounded by a
transparent canopy located a few meters above ground level. The ground beneath
this canopy or collector as it is known is heated by the ...
A critical evaluation and refinement of the performance prediction of wet-cooling towers
(Stellenbosch : University of Stellenbosch, 2003-12)
The thermal performance prediction of wet-cooling towers is critically analyzed and refined. Natural draft
counterflow towers and mechanical draft counterflow and crossflow towers are considered. The Merkel,
Poppe and ...
Thermal charcteristics of a greenhouse for aquaculture
(Stellenbosch : University of Stellenbosch, 2006-03)
Successful housing and breeding of exotic animals or plants often requires an environment that is quite different to the ambient conditions present. The current study approached the problem of sub-optimal water temperatures ...
A numerical analysis of the flow field surrounding a solar chimney power plant
(Stellenbosch : University of Stellenbosch, 2004-04)
ENGLISH ABSTRACT: This study investigated the flow field above a proposed solar chimney power plant, without
a cross wind, using a commercial numerical solver in the form of CFX 4-4 by AEA
Technology plc. The governing ...
Evaluation and performance prediction of cooling tower rain zones
(Stellenbosch : University of Stellenbosch, 2007-03)
Cooling tower rain zone performance characteristics such as the loss coefficient
and the Merkel number are evaluated and simulated. To this end the influence of
drop diameter and drop deformation on the velocity, path ...
Performance characteristics of an air-cooled steam condenser incorporating a hybrid (dry/wet) dephlegmator
(Stellenbosch : Stellenbosch University, 2008-12)
This study evaluates the performance characteristics of a power plant incorporating a steam turbine and a direct air-cooled dry/wet condenser operating at different ambient temperatures. The proposed cooling system uses ...