@book{56268,
	author = {Muhammad, Junaid Ahsan  and Department of Energy and Environment Engineering },
	title = {Comparative Study of The Performance of Different Solar Still (ME Thesis)},
	publisher = {QUEST,},
	year = {2012},
	address = {Nawabshah:},
	note = {ABSTRACT

The clean and safe fresh potable water is the need of humanity. The world is facing sever scarcity of the potable water supplies due to population growth and industrialization. The researchers are working on various technologies to convert brackish water into the potable water. Solar stills are one of the techniques under research for production of potable water. This study comprises the comparative study of the Hexagonal Tomb and Dome Type passive basin type solar stills. Passive basin type stills are most promising, economical and simple solar still among its various types. In this thesis distillate yield performance, effect of operational parameters like water depth, area of the still, insulation of the still, orientation of the still and the effect of climatic parameter i.e., Ambient temperature, humidity, wind speed and solar intensity are investigated.
The distillate yield performance of both the stills is determined experimentally by operating them for two weeks. Average distillate yield of 1204.17 m l/m2, maximum distillate yield of 1396 m l/m 2 and minimum yield of 910 m l/m 2 was achieved for Hexagonal Tomb solar still. Whi le average distillate yield of 1041 .21 m l/m 2, maximum
distillate yield of 1236.9 m l/m 2 and minimum yield of 787.4 m l/m 2 was achieved for.

Dome Type solar still.

The deductions on the operational factors are drawn through graphical representation. Water depth found to be having significant effect and reduction in water depth is resulting in increased distillate yield for both stills. Distillate yield is also increasing with increase in area as dome type still is even adjusted for same area as the larger area Hexagonal still is, but distillate yield for the dome type remained less which shows solar radiations and climatic condition interact differently with small er and larger areas. It is also investigated

that improved insulation is resulting in more productivity in case of both still. East-West and North-South orientations are only investigated for Dome Type Stil l, as hexagonal still is occupying same orientation; East-West orientation of the solar still is resulting in more production from Dorne type still.
Both Stills are also investigated for the varying climatic conditions. A m bient temperature is  found  to  have  prominence  i n  prod uctivity  of  sti ll,  average  ambient  temperature remained  29.71°C,  and  maxim um  dai ly  average  temperature  remained  3 L57oC minim um  daily  average  tem perature  found  25.57°C. Disti llate yield  on the days with maximum  daily  average temperature  is found  more  while  compared  to precedi ng and succeeding days. Hum idity is determ ined to have inverse relation with disti l late yield and more  distillate  yield  is  gained  on  the  days  with  less  hum idity  whi le  com pared  to preceding  and  succeeding  days. Maxi mum  daily humid ity was  64%, Mini m um  daily humid ity was 39 and  average  humidity  remai ned 48.18%.  Generally  increase  in solar intensity resul ted in more gain, but there is l ittle variati on i n resul ts due to water depth and other operational and cl imatic parameters. Minim um, maxim um  and average Solar intensity  were  9522,   1 1 1 16,  I 0345  tux  correspondi ngly.   Wind   speed  found   less significant and variable results are prod uced. However, m inim um, maxi m um and average wind speeds were 0.95, 3.1 and 1.81 rn/sec respectively .
It is concluded that Hexagonal Tomb Solar Still is better choice in terms of productivity while compared with  Dorne Type  Solar  still.  It is also resolved  that operational  and
climatic parameters are having significant impact on the performance of the solar stills. The Quality of distillate water from both the sti lls is accordi ng to the WHO guidelines/NEQS  (Proposed).








},
	url = {https://tinyurl.com/v7susc9k}
}