scholarly journals A Study of Solar Desalination Still Combined with Air-Conditioning System

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Z. S. Abdel-Rehim ◽  
A. Lashine
Keyword(s):  
Fresh Water ◽  
Air Conditioning ◽  
Water Productivity ◽  
Integrated System ◽  
Maximum Efficiency ◽  
Present System ◽  
Solar Still ◽  
Combined System ◽  
Air Conditioning System ◽  
Solar Desalination

A study of solar desalination still combined with air-conditioning system is presented in this work. Combining the solar still with the air-conditioning system can increase the condensate output from the solar still while meeting the cooling load needs. The operation of the combined solar distillation and air-conditioning system, that utilized the heat rejected by the condenser and the heat sink of the evaporator, has been tested to obtain the distillate output from the solar still during the air-conditioning of a space application. Experimental work of the present system is carried out in June 2009 (summer month), in Cairo, Egypt. The present problem is tested to use the integrated system operation for already utilizing air-conditioning energy consumption; that is, meeting the hourly air-conditioning load and the daily fresh water production. The system is tested for day and nighttimes of operation of the combined system for the summer month: June 2009, Cairo, Egypt. Economic study evaluation is presented. The results show that the maximum fresh water productivity through June is 29 Liters in daytime of June 5 2009 and 37 liters in nighttime (nocturnal time) of June 3 2009. The present system more efficient in day time (8:00 AM–8:00 PM) and night time (8:00 PM–8:00 AM). Therefore, the maximum efficiency is recorded 40% for the present system in daytime, 36% in nighttime, and 25% for conventional solar still. COP increases with inside temperature (Ti), however it decreases with outside temperature (Tamb). The average cost of one liter of distillate water from the present combined system = 0.021441 (LE).

scholarly journals Effect of glass thickness on performance of double slope inward solar desalination still for fresh water production

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
C.K. Sivakumar ◽  
Y. Robinson ◽  
K. Saravanakumar
Keyword(s):  
Solar Energy ◽  
Fresh Water ◽  
Water Productivity ◽  
Heat Losses ◽  
Water Production ◽  
Solar Still ◽  
Glass Material ◽  
Glass Thickness ◽  
Solar Desalination

This paper deals with the effect of thickness of glass material which covered on double slope solar desalination still, performance of the solar still affected by thickness of the glass, which result in to major heat losses in the system. Two inward double slope desalination still with different glass thickness were designed, constructed and experimentally tested their performance. The glasses are inclined 200 from the center of the still. The solar energy collecting area of still is 1m2.The result shows that the variation in glass thickness will affect the efficiency of the still, desalination still with 4mm thickness gives 48% higher fresh water productivity compare to 6mm glass thickness.

System Optimization and Exergy Analysis of Air Conditioning System for Data Center

2013 ◽  
Vol 291-294 ◽  
pp. 1857-1862
Author(s):  
You Yin Jing ◽  
Qian Qian Liu ◽  
Jiang Jiang Wang
Keyword(s):  
Energy Consumption ◽  
Data Center ◽  
Air Conditioning ◽  
Exergy Analysis ◽  
Operation Mode ◽  
System Optimization ◽  
Maximum Efficiency ◽  
System Operation ◽  
Air Conditioning System ◽  
Suitable Combination

As the air conditioning energy consumption of the date center has increasingly become the focus of attention, reformation for the energy consumption and exploration for the suitable combination model of the air conditioning system have significance in energy saving. This paper makes a program design for the air-conditioning system of a data center in Beijing, makes an analysis of the system operation mode and uses the concept of exergy efficiency to optimize the air conditioning system in order to achieve maximum efficiency.

scholarly journals Novel Cascade Solar Desalination Still: Mathematical, Numerical and Experimental Analysis

2019 ◽  
Vol 286 ◽  
pp. 08007
Author(s):  
M. Bouzaid ◽  
N. Mouhsin ◽  
M. Taha-Janan ◽  
M. Oubrek ◽  
O. Ansari
Keyword(s):  
Solar Energy ◽  
Fresh Water ◽  
Thermal Performance ◽  
Saline Water ◽  
Solar Still ◽  
Balance Equations ◽  
Absorber Plate ◽  
Solar Desalination ◽  
New Construction ◽  
Experimental Process

Morocco is considered as a water-stressed country and is among the countries that face fresh water scarcity. However Morocco has an important solar energy and a significant amount of seawater and ocean. Therefore converting saline water to fresh water using solar energy is the perfect and the cleanest solution. Solar still is the simplest, cleanest and cheapest technology of solar desalination. In this paper a novel solar still with stepped-slope absorber plate and baffles was proposed and developed in order to enhance the thermal performance of the conventional solar stills. In order to validate the performance of the developed technology a comparative study were elaborated. A mathematical model was developed. The energy balance equations for the various elements of the solar still are formulated and numerically solved using the dynamic simulation program Matlab/SimulinkTM and the Euler explicit method programmed by C++. Also, the experimental process of the new construction was evaluated and validates the new pattern performance. The thermal performance was investigated and shows considerable improvement through the new construction.

Evaluation of a Triple Effect Absorption Air Conditioning System Integrated With PEM Fuel Cell

2010 ◽  
Author(s):  
Mohamed Gadalla ◽  
Tahir Abdul Hussain Ratlamwala ◽  
Ibrahim Dincer
Keyword(s):  
Fuel Cell ◽  
Heat Input ◽  
Parametric Study ◽  
Air Conditioning ◽  
Pem Fuel Cell ◽  
Integrated System ◽  
Inlet Temperature ◽  
Cooling Load ◽  
Air Conditioning System ◽  
Utilization Factor

In this paper, a parametric study of the TEARS integrated with PEM fuel cell is conducted in order to investigate the effect of different operating parameters on the COPs and utilization factor of the integrated system. It is found that when the inlet temperature of the HTG is increased, the energetic and exergetic COPs vary in an exponential form from 0.56 to1.86, and 0.28 to 0.964, respectively, and the heat input decreases from 34.4 kW to 9.802 kW. When the high pressure of the TEARS system is increased, both the COPs decrease, ranging from 4.4% to 9.9%, while the heat input increases by 6%. Also, an increase in the cooling load of the TEARS for different heat input results in the variation of the COPs from 0.17 to 3.4. Moreover, a parametric study for PEM fuel cell is carried out at an optimum practical operating condition of cooling load of 20 kW and heat input of 9.802 kW for TEARS, which results in the energetic and exergetic COPs of 1.86, and 0.964, respectively. The optimum area of the cell is found to be varying from 0.436 to 54.5 m2 for different current densities pressures and temperatures. However, increase in the area of the cell resulted in the higher efficiency of the cell, ranging from 27.5% to 42%. Moreover, when the molar flow rate is increased, the utilization factor of the system is found to be decreasing exponentially ranging from 77% to 35%. This study reveals that an integrated air conditioning system with fuel cell is an attractive economical and environmental solution when compared with conventional systems of high electricity and natural gas prices.

scholarly journals Improvement of solar still productivity by using PCM and other enhancement technique- A review

2021 ◽  
Vol 13 (1) ◽  
pp. 98-104
Author(s):  
Abhinav Yadav ◽  
Md Saifullah Khalid ◽  
Prashant Saini ◽  
Ankit Kumar
Keyword(s):  
Stearic Acid ◽  
Fresh Water ◽  
Potable Water ◽  
Pure Water ◽  
Agricultural Expansion ◽  
Solar Still ◽  
Enhancement Technique ◽  
Solar Desalination ◽  
The World

The necessity of pure water is rising each day, causes are population, industrial and agricultural expansion, worldwide. Due to the increasing population of world the fresh water will become more serious problem in the coming days. Hence, people around the world have to work on different and efficient methodology to generate potable water. Solar still is one among these methods acting device. In this paper, a review of using PCM and PCM with other enhancement techniques has been discussed. Use of stearic acid as a PCM below the liner of basin, each day pure water of 9.005kg/m2 per day and 4.998 kg/m2 per day has been found in the company of PCM and not including of PCM respectively. It is observed that solar desalination system in the company of paraffin-CuO is best among the others solar still with paraffin PCM, paraffin-TiO2, paraffin-GO. CuO, TiO2 and GO are the nanoparticles.

scholarly journals Design and Development of Solar Desalination Plant: Point-Focus Parabolic Solar Still

2018 ◽  
Vol 5 (2) ◽  
pp. 124-133
Author(s):  
S.M. Atnaw ◽  
R.M. Ramli ◽  
S.A. Rusdah ◽  
T. Marimuthu ◽  
P. Mardarveran ◽  
...  
Keyword(s):  
Water Supply ◽  
Fresh Water ◽  
Potable Water ◽  
Saline Water ◽  
Solar Still ◽  
Direct Sunlight ◽  
Solar Desalination ◽  
Generation Capacity ◽  
Is Design ◽  
Installation Cost

Direct sunlight has been utilized long back for desalination of water. Solar still is a device that converts saline water to potable water. This project mainly discussed about point-focus parabolic solar still (PPSS). Since lack of water supply has become a serious problem today, this prototype is design to produce fresh water from saline water to enable continuous supply of water. However, the current solar desalination generation capacity is generally low and has high installation cost. Hence, there is a need for the enhancement of the productivity which can be achieved through point focus parabolic solar still. Existing PPSS produces of 3.56 L/m2 fresh water of per day. In this project, we have some modifications which will increase the productivity of PPSS.

scholarly journals A Review of High Performance Solar Stills for Desalination of Waste Water

2021 ◽  
Vol 9 (VI) ◽  
pp. 1087-1092
Author(s):  
Abhishek S. Kagdelwar
Keyword(s):  
Fresh Water ◽  
High Performance ◽  
Pure Water ◽  
Renewable Resource ◽  
Solar Still ◽  
Or Efficiency ◽  
High Productivity ◽  
Reference Guide ◽  
Evaporation And Condensation ◽  
Solar Desalination

Pure water is renewable resource on the earth, it getting impure now a days. Solar desalination is one of the best way to produce fresh water from any type of impure water in a sustainable way. A solar still is a simply design device used to purify the water by using solar energy by the process of evaporation and condensation. Generally, the productivity of the conventional solar still is about 1–5 L/m2/day. But this quantity is not sufficient for an individual to fulfill daily needs of water in life. Hence either more than 1 L/m2 is required per person or better for modifications to improve the solar still design for the demand of the fresh water (likely more than 5 L/m2/day). In this work, an attempt has been made to categorize the different solar still designs with productivity more than 5L/m2/day. Here, we identify as such efficient high productivity of solar stills and discuss their modifications and heat transfer mechanism to reach at useful conclusions. This review will be a reference guide for future researchers who wish to concentrate only on efficient high productivity of solar stills to improve the productivity or efficiency.

scholarly journals Comparative Study of Three Solar Desalination Units Based on Theoretical and Experimental Approach

2019 ◽  
Vol 01 (01) ◽  
pp. 112-118 ◽  
Author(s):  
Houcine Moungar ◽  
Ahmed Azzi ◽  
Youcef Sahli ◽  
Abdelkarim Haida
Keyword(s):  
Experimental Study ◽  
Comparative Study ◽  
Experimental Approach ◽  
Produced Water ◽  
Water Productivity ◽  
Water Layer ◽  
Water Quantity ◽  
Solar Still ◽  
Solar Desalination ◽  
Water Amount

This work presents a theoretical and experimental study of a double slope still with and without immersed fins compared to the single solar still monthly production. The influences of the distance between fins, fin heights, fin numbers and water layer thickness on the solar still production have been widely researched. From the obtained results, the distance between fins has no significant effect on the still productivity. Moreover, for fin heights from 2 to 5 cm, cause the productivity raising, when the fin heights are from 6 to 8 cm found an increasing in the still production. A larger fin numbers lead to a rising in the produced water amount. The water quantity augmentation in the basin makes the water productivity decreasing. The experimentally obtained results during the day June 11, 2016, show that the solar still with immersed fins productivity was about 15 to 27 % higher than that of the simple solar still, under the following conditions, i.e. mw = 42.61 kg, h1 = 3.6 cm, Vw = 3.5 m/s, lw = 5 cm and Nfins = 12.

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