Thesis (MScEng)-- Stellenbosch University, 2013. / ENGLISH ABSTRACT: The objective of this research was to obtain clean drinkable water from treated
sewage effluent by using a solar-powered distillation cycle. Technologies and
concepts were borrowed from the solar desalination industry to propose a unique
circular distillation cell design. From the design, a specific mathematical
correlation was developed to predict the distillate mass flow rate by using only
evaporation and condensation temperature as inputs.
This model was incorporated into a simulation model built using Transient
System Simulation software. Long-term simulations were carried out to determine
the operating capabilities of the design. A prototype was successfully constructed
and operated. Experimental results indicated good agreement with the mass flow
rate mathematical correlation. Water quality levels were tested against the South
African National Standard 241 national drinking water quality standard. Four
quality parameters are outside acceptable levels. Evidence suggested that
acceptable quality levels could be reached.
The circular distillation cell design is a major contribution made by this research.
Another contribution is the simulation model capable of predicting an output for
different locations. Finally, the proposed prototype is potentially a very valuable
device contributing towards the reduction of consumer demand in terms of water
and energy as well as the household load on the wastewater treatment system. / AFRIKAANSE OPSOMMING: Die doel van hierdie tesis is om te beskryf hoe behandelde rioolwater deur middel
van ’n son aangedrewe distillasiesisteem gesuiwer kan word om drinkbare water
as eindproduk te lewer. Die nodige tegnologieë en konsepte is oorgeneem uit
kommersiële sonaangedrewe ontsoutingsisteme om met ’n unieke ontwerp
voorendag te kom wat uit ’n sirkelvormige natuurlike konveksie distillasiesel
bestaan. Met behulp van hierdie ontwerp is ’n wiskundige korrelasie ontwikkel
om die gesuiwerde water se massavloei te bepaal. Slegs die verdampings- en
kondensasietemperature word as insetwaardes gebruik om die massavloei te
bereken.
’n Simulasiemodel is met behulp van die Transient System Simulation
programmatuur gebou. Die wiskundige korrelasie is by die simulasiemodel
geïnkorporeer om langtermynsimulasies te kan uitvoer. Voorts is ’n
demonstrasiemodel suksesvol gebou en aangedryf. Eksperimentele resultate
toon goeie ooreenstemming met die simulasieresultate. Die gesuiwerde water se
gehalte is met die nationale SANS 241 drinkwaterstandaard as maatstaf getoets.
Slegs vier gehalteparameters val buite die aanvaarbare vlakke, hoewel dit blyk
dat hierdie elemente wel tot aanvaarbare vlakke verlaag kan word.
Hierdie navorsing se grootstet bydrae is die ontwerp van die unieke sirkelvormige
distillasiesel. ’n Bykomende bydra is die aanpasbaarheid van die simulasiemodel
sodat dit produksievermoë op verskillende plekke kan voorspel. Die
demonstrasiemodel is ’n potensieel waardevolle ontwerp wat kan bydra tot die
verlaging in verbruikersaanvraag na water en energie. ’n Ontwerp van hierdie
aard kan die las wat huishoudings op suiweringaanlegte vir rioolwater plaas,
verlig.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/85631 |
| Date | 12 1900 |
| Creators | Hartwig, Gerhard Rudolf |
| Contributors | Sebitosi, A. B., Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | Unknown |
| Type | Thesis |
| Format | xi, 105 p. : ill. |
| Rights | Stellenbosch University |
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