Performance analysis of solar still with cow dung cakes and blue metal stones

doi:10.1007/s11708-015-0361-y

Front. Energy

2015, Vol. 9

Issue (2) : 180-186 https://doi.org/10.1007/s11708-015-0361-y

RESEARCH ARTICLE

Performance analysis of solar still with cow dung cakes and blue metal stones

Hitesh N. PANCHAL(

)

Mechanical Engineering Department, Gujarat Power Engineering and Research Institute, Mevad 382710, India

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Abstract

The aims of this paper is to investigate the effects of various materials inside the solar still on the increase of the productivity of potable water. Here, blue metal stones and cow dung cakes were used as materials. To investigate their effect, three identical solar stills with an effective area of 1 m square made from locally available materials were tested in climate conditions of Mehsana (23°50′ N 72° 23′). The first and second solar stills were filled with blue metal, stones and cow dung cakes, while the third one was taken as a reference which consisted of only blue paint at the basin. The experiments show that blue metal stones have the highest distillate output at daytime, followed by cow dung cakes solar still and reference solar still. On the other hand, the overall distillate output of blue metal stones and cow dung cakes at daytime as well as at night were 35% and 20% compared with that of reference solar still.

Keywords blue metal stones cow dung cakes distillate output solar still solar intensity

Corresponding Author(s): Hitesh N. PANCHAL

Just Accepted Date: 22 April 2015 Online First Date: 18 May 2015 Issue Date: 29 May 2015

Cite this article:

Hitesh N. PANCHAL. Performance analysis of solar still with cow dung cakes and blue metal stones[J]. Front. Energy, 2015, 9(2): 180-186.

URL:

https://academic.hep.com.cn/fie/EN/10.1007/s11708-015-0361-y
https://academic.hep.com.cn/fie/EN/Y2015/V9/I2/180

Fig.1 Experimental setup

Fig.2 Blue granite gravel used in experiment

Fig.3 Cow dung cakes used in experiment

Tab.1 Accuracies and error for various measuring instruments [4]

Quantity	Symbol	Expression
Specific heat	C_p	$999.2 + 0.1434 × T v + 1.101 T v − 2 − 6.75 × 10 − 8 T v 3$
Density	ρ	$353.44 / (T v + 273.15)$
Thermal conductivity	λ	0.0244+ 0.7673 × 10⁻⁴T_v
Viscosity	μ	1.718 × 10⁻⁵ + 4.620 × 10⁻⁸T_v
Latent heat of vaporization of water	L	3.1615 × 10⁶× [1– (7.616 × 10⁻⁴T_v] when T_v>70°C; 2.49 × 10⁶× [1–(9.4 × 10⁻⁴T_v + 1.312 × 10⁻⁷ $T v 2$ – 4.19 × 10⁻⁹ $T v 3$ ] when T_v<70°C
Partial saturated vapor pressure at condensing cover temperature	P_ci	$exp ⁡ (25.317 − 5144) / (T c i + 273)$
Partial saturated vapor pressure at water temperature	P_w	$exp ⁡ (25.317 − 5144) / (T w + 273)$
Expansion factor	β	$(T v + 273.15) − 1$

Tab.2 Temperature dependent physical properties of vapor [4]

Fig.4 Hourly variations of different temperatures of solar still

Fig.5 Hourly variations of solar stills

Fig.6 Variations of basin water temperatures inside solar stills

Fig.7 Variations of vapor temperatures of solar stills

Fig.8 Variations of distillate output of solar still in 7?days

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[1]	R. LALITHA NARAYANA, V. RAMACHANDRA RAJU. Experimental study on performance of passive and active solar stills in Indian coastal climatic condition[J]. Front. Energy, 2020, 14(1): 105-113.
[2]	Hitesh N PANCHAL, P K SHAH. Enhancement of distillate output of double basin solar still with vacuum tubes[J]. Front Energ, 2014, 8(1): 101-109.

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