A.K. Pandey

Comparative experimental study of solar cookers using exergy analysis

This communication presents the comparative experimental study of solar cookers based on the exergy analysis. In this study two different types of solar cookers viz. paraboloid type and box type have been evaluated using exergy analysis. The experiments have been carried out with cookers filled with different volume of water viz. one and two liters along with the suitable quantity of rice. Data of temperatures and solar radiation have been measured for different food stuff on clear sky day of the month. It is found that the exergy efficiency increases as the volume of water increases, however, the exergy efficiency of paraboloid solar cooker is found to be higher than that of the box-type solar cooker for all the cases mentioned above. However, it is also found that the exergy efficiency vary with the cooking stuff and water which is due to the fact that the requirement of heating vary with the food stuff.

Thermodynamics and performance evaluation of encapsulated PCM-based energy storage systems for heating application in building

This communication presents the comparative study of two different types of thermal management systems for room’s heating applications using calcium chloride hexahydrate as the thermal energy storage material encapsulated in panels and balls. During the daytime, TMS was outside the test room to store the solar heat in TMS. The solar heat made available to charge the PCM from solid to liquid and to warm the test room throughout the observation period during night time. As the room temperature drops significantly during the night time, so as the level of comfort. Both the thermal management systems have been used to heat the test room during night time and the temperature of the test room has been maintained at thermal comfort level without any conventional source of energy, i.e. using passive system. Also the experimental values were compared with those of the theoretical values and are found in good agreement with each other. Thus, it can be concluded that the experimental study carried out for both the thermal management systems have been validated by theoretical approach or vice versa and hence found to be satisfactory towards the successful operation of these systems.

Experimental study and performance evaluation of various cook stove models based on energy and exergy analysis

This article presents the experimental study and comparative performance evaluation of four types of cook stoves using energy and exergy analysis. Analysis of four different types of cook stove models viz. Envirofit, Mangla, Harsha and Vikram were selected and the water boiling test has been carried out. The suitable biomass available from the local market was prepared in the proper size as described in the Bureau of Indian Standards (BIS) and has been used as the fuel for cook stove in this experimental study. The aluminium pots of proper capacity as per BIS standard have been used for different cook stoves. The data from the experiments was collected and evaluated for the energy and exergy efficiencies for different models. Based on the data analysis it is found that the exergy efficiency is much lower than that of the energy efficiency for all the four models. It is also found that the both the efficiencies of Envirofit model are found to be higher than those of other models studied here.

Exergetic analysis and parametric study of multi-crystalline solar photovoltaic system at a typical climatic zone

This communication deals with the performance evaluation and parametric study of multi-crystalline solar photovoltaic module using energy and exergy analysis for different months of the year at a typical climatic zone in north India. Three different efficiencies viz. energy, power conversion and exergy have been calculated and plotted against time based on hourly solar radiation. All the three efficiencies for the month of February have been found to be the highest among all the months analysed and presented in the study. The energy efficiency for the month of December is found to be the least; however, the exergy efficiency for the month of July is found to be the least. All the efficiencies have been found to be much higher during the morning and evening hours as compared to the noon hours for all the operating months. The energy efficiency is found to be higher than those of the power conversion and exergy efficiencies throughout the year.

Solar Photovoltaics (PV): A Sustainable Solution to Solve Energy Crisis

Although sun is the source of all forms of energy including the energy contained in fossil fuels, the term “solar energy” is meant the energy obtained directly from sun’s radiation. Solar photovoltaic (PV) is the most promising of all the active solar energy technologies. This technology is affordable and the source of this energy is inexhaustible. Moreover, it is the cleanest source of energy developed so far, thereby establishing it as a sustainable solution to solve energy crisis. This chapter presents a succinct picture of the solar PV technology along with classification and application areas. The status of the technology maturity and energy–exergy and economic aspects of PV technology has also been addressed.

Annual Performance analysis of Single basin passive solar still coupled with evacuated tubes : Comprehensive study in climate conditions of Mahesana, Gujarat

ABSTRACT A solar still is very simple device to convert available brackish or saline water into drinkable water by use of solar energy. But due to its lower distillate output, it is not used widely for industrial and domestic potable water application. In the present research paper, annual performance analysis of a single-basin passive solar still with vacuum tubes (SBSWVT) is carried out in climate conditions of Mahesna, Gujarat, India, during July 2011–June 2012. From constant research work of 1 year, energy payback time of 176 days and cost of water produced of around 0.716 Rs per litre have been found.

The Hybrid Solar Power/Wind System for Energy Production, Observation, Application, and Simulation

Abstract This study illustrates a crossbreed arrangement of the sun-oriented and wind innovation that uses the sun-powered photovoltaic cells and the wind turbine frameworks, which can be most advantageously understood through momentous researches. The sunlight-based photovoltaic, wind turbine, and the related advancements are being updated step by step. These innovations will be controlled by distinctive strategies and will be fully described in this chapter. The use of both the renewable sources of energy will also be adequately mentioned. The use of a crossbreed controller for renewable energy system will likewise be discussed in this chapter. This perception will be in contrast with the diverse variations of crossover frameworks which can help to decide on a better innovation later on. As a consequence, this section can bring about an experience of a flow pattern of examination around the globe.

Year round performance and parametric study of thin film solar photovoltaic system

Present communication deals with the year round performance evaluation of thin film solar photovoltaic module based on energetic and exergetic approaches for a typical climatic zone in north India. Three different efficiencies including energy, power conversion and exergy have been evaluated and plotted against time for hourly solar radiation. The exergy and power conversion efficiencies for the month of July were the highest among all the months analyzed and presented in the study. The exergy efficiency for the month of January is found to be the lowest however, the energy efficiency is found to be the lowest in the month of December. The energy efficiency is always higher than that of power conversion and exergy efficiencies for all the cases.