Optimum input flow rate of solar still XX in producing purified water based on geographical condition in Depok, West Java

2021 ◽  
Author(s):  
Reski Septiana ◽  
Michael Abraham Listyawan ◽  
Bayu Wisely Purbojati ◽  
Ibnu Roihan ◽  
Raldi Artono Koestoer
Keyword(s):  
Flow Rate ◽  
Solar Still ◽  
Input Flow ◽  
West Java ◽  
Water Based ◽  
Optimum Input

scholarly journals Performance enhancement of modified double slope passive solar still using different water-based nanofluids

2021 ◽  
Vol 1146 (1) ◽  
pp. 012021
Author(s):  
Suresh Kr. Patel ◽  
Vinay Kr. Singh ◽  
Mahindra Singh ◽  
Deepak Singh ◽  
Dhananjay Singh
Keyword(s):  
Performance Enhancement ◽  
Solar Still ◽  
Water Based ◽  
Passive Solar Still ◽  
Passive Solar

Optimizing the performance of hemispheric solar still using nano-ZnO with cooling the glassy cover at a variable water flow rate

2021 ◽  
Author(s):  
Mohammed El Hadi Attia ◽  
Abd Elnaby Kabeel ◽  
S. A. El-Agouz ◽  
El Mir Mabrouk Lassaad ◽  
Ravishankar Sathyamurthy ◽  
...  
Keyword(s):  
Water Flow ◽  
Flow Rate ◽  
Water Flow Rate ◽  
Solar Still ◽  
Nano Zno ◽  
Variable Water

Quantitative comparison of processes of oil- and water-based mud-filtrate invasion and corresponding effects on borehole resistivity measurements

Geophysics ◽  
2009 ◽  
Vol 74 (1) ◽  
pp. E57-E73 ◽  
Author(s):  
Jesús M. Salazar ◽  
Carlos Torres-Verdín
Keyword(s):  
Electrical Resistivity ◽  
Flow Rate ◽  
Water Saturation ◽  
Base Case ◽  
Petrophysical Properties ◽  
Resistivity Measurements ◽  
Fluid Saturation ◽  
Mud Cake ◽  
Water Based ◽  
Mud Filtrate

Some laboratory and qualitative studies have documented the influence of water-based mud(WBM)-filtrate invasion on borehole resistivity measurements. Negligible work, however, has been devoted to studying the effects of oil-based mud(OBM)-filtrate invasion on well logs and the corresponding impact on the estimation of petrophysical properties. We quantitatively compare the effects of WBM- and OBM-filtrate invasion on borehole resistivity measurements. We simulate the process of mud-filtrate invasion into a porous and permeable rock formation assuming 1D radial distributions of fluid saturation and fluid properties while other petrophysical properties remain constant. To simulate the process of mud-filtrate invasion, we calculate a time-dependent flow rate of OBM-filtrate invasion by adapting the available formulation of the physics of WBM-filtrate invasion. This approach includes the dynamically coupled effects of mud-cake growth and multiphase filtrate invasion. Simulations are performed with a commercial adaptive-implicit compositional formulation that enables the quantification of effects caused by additional components of mud-filtrate and native fluids. The formation under analysis is 100% water saturated (base case) andis invaded with a single-component OBM. Subsequently, we perform simulations of WBM filtrate invading the same formation assuming that it is hydrocarbon bearing, and compare the results to those obtained in the presence of OBM. At the end of this process, we invoke Archie’s equation to calculate the radial distribution of electrical resistivity from the simulated radial distributions of water saturation and salt concentration and compare the effects of invasion on borehole resistivity measurements acquired in the presence of OBM and WBM. Simulations confirm that the flow rate of OBM-filtrate invasion remains controlled by the initial mud-cake permeability and formation petrophysical properties, specifically capillary pressure and relative permeability. Moreover, WBM causes radial lengths of invasion 15%–40% larger than those associated with OBM as observed on the radial distributions of electrical resistivity. It is found also that, in general, flow rates of WBM-filtrate invasion are higher than those of OBM-filtrate invasion caused by viscosity contrasts between OBM filtrate and native fluids, which slow down the process of invasion. Such a conclusion is validated by the marginal variability of array-induction resistivity measurements observed in simulations of OBM invasion compared with those of WBM invasion.

scholarly journals Exergy Analysis of Modified Solar Still

2015 ◽  
Vol 10 (2) ◽  
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Brackish Water ◽  
Solar Collector ◽  
Exergy Analysis ◽  
Cooling Tower ◽  
Volume Flow Rate ◽  
Exergy Efficiency ◽  
Solar Still

A new design of solar still consist of flat plate solar collector, heat exchanger and cooling tower, was built and tested under Iraq weather at March. The still was tested under different mass flow rate of brackish water entering the flate plate solar collector, ranging from 0.01 to 0.015 kg/s. The volume flow rate of air through cooling tower was 0.0195 m3 /s. A full details of overall system as well as for system components exergy analysis were achieved. It was found that the maximum daily exergy efficiency of the still is less than 1%. While the maximum hourly exergy efficiency and maximum productivity for such combination were 3.46 kg/day and 1.6% , respectively, when the mass flow rate of brackish water was 0.013 kg/s.

scholarly journals Efficiency Improvement of a Photovoltaic Thermal (PVT) System Using Nanofluids

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3063 ◽  
Author(s):  
Joo Hee Lee ◽  
Seong Geon Hwang ◽  
Gwi Hyun Lee
Keyword(s):  
Flat Plate ◽  
Flow Rate ◽  
Thermal Efficiency ◽  
Measurement Errors ◽  
Efficiency Analysis ◽  
Working Fluid ◽  
Efficiency Improvement ◽  
Flow Rates ◽  
Electrical Efficiency ◽  
Water Based

Many studies and considerable international efforts have gone into reducing greenhouse gas emissions. This study was carried out to improve the efficiency of flat-plate photovoltaic thermal (PVT) systems, which use solar energy to produce heat and electricity simultaneously. An efficiency analysis was performed with various flow rates of water as the working fluid. The flow rate, which affects the performance of the PVT system, showed the highest efficiency at 3 L/min compared with 1, 2, and 4 L/min. Additionally, the effects of nanofluids (CuO/water, Al2O3/water) and water as working fluids on the efficiency of the PVT system were investigated. The results showed that the thermal and electrical efficiencies of the PVT system using CuO/water as a nanofluid were increased by 21.30% and 0.07% compared to the water-based system, respectively. However, the increase in electrical efficiency was not significant because this increase may be due to measurement errors. The PVT system using Al2O3/water as a nanofluid improved the thermal efficiency by 15.14%, but there was no difference in the electrical efficiency between water and Al2O3/water-based systems.

Thermo-physical characteristics of passive double slope solar still loaded with MWCNTs and Al2O3-water based nanofluid

2020 ◽  
Vol 32 ◽  
pp. 344-349
Author(s):  
Lovedeep Sahota ◽  
Swati Arora ◽  
Harendra Pal Singh ◽  
Girijashankar Sahoo
Keyword(s):  
Physical Characteristics ◽  
Solar Still ◽  
Water Based
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