Bøger af Hitesh Panchal

The main aim of this research work is to test and evaluate the performance of solar milk pasteurization system. To evaluate the performance of solar milk pasteurization system, solar hot water system, concentric tube type heat exchanger, cooling tank has used. To test the solar milk pasteurization system, three different mass flow rate of hot water like 2 liter/minute, 3 liter/minute and 5 liter/minute and cold milk 0.5 litre/minute, 0.7 litre/minute and 1.0 litre/minute have been used. After the pasteurization, the obtained milk from the concentric tube type heat exchanger has been tested in laboratory and obtained satisfactory results. From the series of experiments, it has been found that, the hot water flow rate of 5 litre/minute and milk flow rate of 0.5 litre/minute found optimum for the pasteurization system. All the results of effect of flow rate on heat transfer from hot water, cold water, Logarithmic mean temperature difference, Overall heat transfer coefficient of inner and outer surface area and effectiveness also determined and compared with other researchers work and found good agreement with the results.

Solar air heating is a solar thermal technology in which the energy from the sun, solar insolation, is captured by an absorbing medium and used to heat air.Solar air heating is a renewable energy heating technology used to heat or condition air for buildings or process heat applications. It is typically the most cost-effective out of all the solar technologies, especially in commercial and industrial applications, and it addresses the largest usage of building energy in heating climates, which is space heating and industrial process heating. People from all around the world working on double pass solar air heater due to its higher efficiency. In this research work, comparison is made between modified design of double pass solar air heater with conventional solar air heater with different mass flow rate and air velocity in identical climate conditions. From the research it is found that, modified design of solar air heater is quite efficient compared with conventional double pass solar air heater.