Sharif Digital Repository

Nowadays, as a result of population growth and groundwater resources pollution, many countries in the world are facing serious water crises. Several alternative solutions have been investigated to overcome this obstacle. Atmospheric water vapor processing (AWVP) is a new solution to generate freshwater from ambient moist air. The atmosphere surrounding the earth is potentially a valuable water resource which contains a large amount of freshwater. This paper addresses the effectiveness of thermoelectric coolers (TECs) for refrigeration to produce freshwater from ambient air. Consequently, both numerical and experimental analysis are then used as the basis of water production calculation. 18... 

Radioisotope thermoelectric generator (RTG) is a kind of nuclear batteries, in which thermal energy resulting from the discharge of charged particles decayed of radioisotope, using thermoelectric arrays, can be converted to electrical energy. In this study, the different kinds of RTGs introduced and applications of them have been expressed. All types of radioisotopes used in RTGs have been reviewed and the most suitable of them in terms of maximum thermal power density and minimum dose rate have been selected. All types of thermoelectrics used in RTGs have been reviewed and the most suitable of them in terms of the range of temperature and maximum efficiency have been selected.
In this... 

Photovoltaic phenomena is the base of Photovoltaic cells technology that can transform the solar insolation to electricity directly. In this transformation, the solar insolation intensity is the important factor to increase the performance of the Photovoltaic cells but one of the biggest barriers in the extension way of this technology is its more cost that need to be decrease. Concentration of solar radiation method is the best way to increase the performance of Photovoltaic systems and decrease its initial cost. At this project a novel structure of solar parabolic through concentrator is investigated experimentally and analytically. The usage of Thermoelectric module with Photovoltaic... 

Nowadays energy consumption increases in our daily life and incredibly enhancement of growth rate can be seen recent years. Hence, the use of renewable energy is prioritized. Solar energy is one of the choices because it is free and available. In this research, it has been tried to get electrical and thermal power at a reasonable cost both during the day and night. The system is equipped with a linear parabolic concentrator with a collector installed in the center of the concentrator which has been installed on its faces photovoltaic cells and thermoelectric modules, and five different systems have been tested with different components. Also, the paraffin has been used as a phase change... 

Today, energy production as well as environmental damage caused by non-renewable fuels has become one of the serious challenges of Society. Thermoelectrics are among the systems that can be used as a new source for cooling and heating production as well as electric energy production.Thermoelectrics can be divided into two categories: Cooler/thermal thermoelectrics and thermoelectric generators. Cooler/thermal thermoelectrics can be used as a source for producing cooling and heating in various applications, among its advantages are the non-use of environment-hazardous refrigerants, suitable for use in small spaces, not heavy and complicated, easy maintenance and low cost. It is also possible... 

Nowadays, due to various advances in the space industry, nuclear generators are widely used to provide the electrical power needed by satellites, spacecrafts and other instruments used in space; So that there is practically no other way than the nuclear industry to produce the required power in some missions; Therefore, it is vital to design nuclear mechanism-based electric power generators. Radioisotope Thermoelectric Generator (RTG) is one of the best and most widely used of these generators. These generators consist of 3 main components: heat source, thermoelectric converter and body. The source of thermal power used is General-purpose heat source (GPHS), which produces thermal power at...