Solar Stills Limitations Of Solar Essay


Solar Stills

Limitations of Solar Stills

The single most important factor in the performance of a solar still is the amount of radiation it receives. More water can be distilled when a greater amount of energy is received. Thus, solar stills produce less distilled water in winter than in summer. In winter, there are fewer sunny days. The lower height of the sun above the horizon keeps daytime temperatures cooler and the air drier. The success of a solar still depends on both heat and humidity, both of which are less generally in winter, depending on the still's location relative to the Equator in the Northern Hemisphere. Mediating the poor wintertime performance of solar stills is the demand for drinking water, which is generally half as much compared to summertime demand.

According to various experimental and mathematical model results, best performance of the solar still is achieved when the following conditions are satisfied: high intensity of insulation, full insulation, and minimum wind velocity. Under these conditions, a maximum solar still efficiency of approximately 50% is obtained. Although the intensity of the insulation has a proportional effect on the productivity of the solar still system, the type of insulation greatly impacts the still performance. A light insulation causes a reduction of 14.5% in the efficiency obtained with full insulation. The wind effect is much more limited. The increase of wind velocity from zero to 3.6 mph yielded a slight reduction (2%) in the still performance.

Repeated tests have shown that the higher the operating temperature of the still, assuming insulation is equal, correlates with higher efficiency. For example, with each 6 degrees Celsius increase in ambient temperature, a still's output increases 7-8%. The application of this finding means that a still operating in a hot desert climate will produce typically as much as one-third more water than the same unit would produce in a cooler climate.

Production of distilled water is also associated with the thermal efficiency of the still itself. Efficiency may range from 30 to 60%, depending on the construction of the still, the amount and type of insulation used, ambient temperatures, wind velocity, and the availability of solar energy. Thermal losses for a typical vary seasonally. To better understand, we can refer to the following table:

Cite this Document:

"Solar Stills Limitations Of Solar" (2011, January 10) Retrieved February 25, 2024, from

"Solar Stills Limitations Of Solar" 10 January 2011. Web.25 February. 2024. <>

"Solar Stills Limitations Of Solar", 10 January 2011, Accessed.25 February. 2024,

Related Documents

Literature Review Solar energy is still a relatively new phenomenon in terms of serving as a new energy supply to rival the use of fossil fuels. However, as Fares and Webber (2017), Lewis (2016) and other researchers show, solar energy has its uses—but also its limitations. Understanding where solar energy is capable of being advanced and where it has run into walls in terms of utilization are key to developing pathways

Solar Powered Attic Fan

attic fan is an essential part of a building in that it helps in the regulation of the temperature of a building by reducing the heat energy level in a building's attic. It does so by getting rid of the hot air that is accumulated in a building. The attic fan helps in the regulation of temperature by the exhaustion of the hot air by through the blade action. Due

It now applies to a wide range of generation technologies, including but not limited to solar thermal electric, photovoltaics, wind, and geothermal electric (DSIRE). For solar systems, the credit is "equal to 30% of expenditures, with no maximum credit. Eligible solar energy property includes equipment that uses solar energy to generate electricity…" (DSIRE). For small wind turbines, the credit is "equal to 30% of expenditures, with no maximum credit"

Proposed Solar-powered Wheelchair Proposed Solar-Powered WheelchairIntroductionIn Africa, most elderly undergo myriad physical challenges like impaired mobility, muscular and nerve degeneration, and reduced balance and motor function. As a result, the wheelchair is considered a vital tool to enhance living quality, mobility, and dignity for the elderly (Chien, 2014). The current wheelchairs are either under the electric-powered category, manual, or power-assisted (Gurrama et al. 2012). The old manual wheelchairs usually bring

The student has provided research on various vibration analytic techniques such as the use of Laser Vibrometry for Damage Detection using Lamb Waves in discovery processes to detect microcracks. Outcome 3. The Information Literacy competency was satisfied through the research efforts made by the student through data gathering regarding aircraft structures and vibrations qualification techniques retrieved from the MIL-STD-810F and NASA Langley Research Laboratory. Techniques include Fatigue Damage Spectrum (FDS)

Summary of work completed To help ensure that affected personnel had an opportunity to communicate their needs for the solution, a telephonic interview with a work coordinator at Ames Central Travel Office was conducted recently; in addition, this telephonic interview was followed by a personal visit to the Ames Research Center in order gain a clearer understanding of the current workflow process. The end users of the solution provided very insightful