Performance Analysis of Solar Still by Using Octagonal-Pyramid Shape in the Solar Desalination Techniques (original) (raw)

Improved Pyramid Solar Still for Solar Water Desalination – A Case Study

International Review of Mechanical Engineering (I.RE.M.E.), 2020

Solar energy is considered as an available source of huge amount of thermal energy with low cost and it is environmentally friendly. Seawater desalination is the main source of freshwater in many countries using different technologies. Seawater desalination using solar thermal energy with passive techniques is vital for arid areas that have shortage in electricity grids or any other sources of energy. In this study, an experimental investigation for a solar still with pyramidal cover in the environmental conditions of arid regions in Saudi Arabia has been conducted. The pyramid surfaces have been designed and directed so that one of the faces receives sunlight directly for a period, which helps in the process of evaporation faster, and the other interface is away from the rays so that the temperature is low to help in the process of condensation of steam. In addition, a seawater feeding system is designed to maintain a constant level of water height within the basin. The accumulated freshwater productivity along sun shining period of the day has reached 3230 gm and the instantaneous productivity takes place at the maximum irradiance period and it has reached 472 gm. The energy and the exergy analyses for the system have indicated that the energy and the exergy efficiencies of the system have reached a maximum of 60% and 5%, respectively. The over day energy and exergy efficiencies of the system have been 31.6% and 2.35%, respectively. The produced freshwater cost from the system has been found out to be 0.1 $/L/m2.

Experimental Study of Innovative Design for Solar Still Desalination

Solar still is a cost-effective and sustainable desalination process since it uses abundant solar energy to lower energy-related expenditures. For the first time, this study provides a new concept of free water production employing Solar Still with a built-in parabolic trough collector (PTC). The suggested solution is based on integrating a conventional solar still (CSS) and a PTC supported by an absorbent plate that serves as a thermal storage medium for the systems. The effect of integrating PTC on conventional single slope solar still as well as performance is being explored experimentally. The results show that the maximum cumulative productivity per hour for the seven-hour work period is 921 ml, and the highest overall productivity is 2451 ml and the maximum efficiency per hour of the modified Solar Still is % 44.9 .

Solar Distillation Based on Pyramid Shape Solar Still-A Review

Water is essentiality of mankind. Water on the earth is available in large quantity but in form of saline water. Large sufficient amount of quantity of water resources are receivable on the earth but only 1% of the Earth's resources when get the fresh water. So accomplish the crucible demand of fresh water need to be convert saline water into drinking water. Distillation is one of the most hopeful methods for getting fresh water but now due to economic factor us of renewable energy for distillation process. Solar distillation most widely use. Solar distillation process becomes complete with help of solar still. Solar still classified mainly classified active and passive but according to shape, it classified based on different shape solar still. In this paper review the distillation process base on pyramid shape solar still and different affecting parameter to increase the yield output.

Research and design of an improved solar still for desalination

Science and Technology Development Journal, 2018

Water is one of the most important resources on Earth because of its vital role for human beings and other living creatures. During the devastating drought in the Mekong Delta in 2016, millions of people had no access to the secure source of fresh water. This issue cautioned and influenced the Vietnamese government to find an effective desalination process for the coastal areas impacted heavily by salinization. However, desalination processes require large amounts of energy which can be a problem for the coastal areas due to the lack of energy and high cost. The main purpose of the study herein was to find an alternative solution for desalination by designing a desalination system using solar energy. The design was expected to provide a small size desalination system for households. The average output of the system was about 854 ml/day with the productivity at 2223.54 ml/day/m2. The average water capture efficiency was 80.5%, the salt elimination efficiency of the system was about 9...

A REVIEW OF DESALINATION BY SOLAR STILL

This communicating article reviews desalination by solar still, and the recent studies on the solar still systems. The review includes basic principle of solar distillation, and also the quality of distilled water. A classification of the solar still systems was made in order to explain the types of solar still systems. General mathematical modeling methodology of solar stills and some mathematical modeling studies are given. The efficiency and performance of the solar still system are also given and discussed.

PERFORMANCE & ANALYSIS AND OPTIMIZATION OF STEPPED TYPE SOLAR STILL

As water shortage is becoming a major problem of national as well as international concern, desalination will increasingly be required to meet growing demands of fresh water. Desalination technologies have developed rapidly during the past several decades for desalting a variety of raw waters such as seawater, brackish ground water, industrial waste water etc.The present study aims to improve the solar still performance and to increase its distillate yield. So it is necessary to evaluate some important parameters affecting the system productivity. The effect of depth of water, glass cover thickness, Different depths of saline water over the basin (5 mm, 7.5 mm and 10 mm); different thicknesses of the glass cover (3.5 mm and 4 mm); are tested under the same climatic conditions. The study aims to introduce the applicability of a stepped type solar still to determine the various parameters that influence the performance of stepped type solar still. To vary the depth of water in the basin of stepped type solar still. To vary glass cover thickness of stepped type solar still. Presentation of the optimized results obtained after detailed analysis of the data generated for various configurations of solar stills. Keywords: Depth of solar stil glass cover thickness enhancement of productivity etc.

New Technique for Water Desalination Using Novel Solar Still And Parabolic Trough Collector

2019

Solar energy is a prominent source of energy. The world is facing water crises and many people die by drinking unhygienic water. Water desalination using solar still is the oldest method. Numbers of researchers are working on it to improve its efficiency. This paper describes some new techniques to increase the efficiency of solar still. Solar still is made using cotta stones, which are giving a low-cost solution. This solar still giving 700 ml output in the month of February. Solar still is tested with different water mass for optimum output.20-liter mass is given the best results. Finally still is clubbed with a parabolic collector to increase efficiency. After connecting with parabolic trough collector efficiency is increased up to 64 %.The prototype is fabricated and tested at Godhra, Gujarat, India.