Increasing the efficiency of solar thermal panels

Abstract

The objective of this experiment was to design, build and evaluate a solar oven that was both economically viable and thermally efficient. In addition to the economic objective, I sought to determine the best reflector angle for the solar cooker, by measuring the following parameters: cooking power, efficiency, and effectiveness. Halogen lamps were used to simulate natural sunlight, as the outdoor condition was too variable in the UK to guarantee continued sunlight for 120 minutes in a controlled fashion. The most effective reflector angle i.e. the reflector angle with the greatest ability to convert the solar insolation into thermal energy is the 60°C. However, the data shows that the 70°C reflector angle produces the highest temperature consistently. Over the series of different methods for evaluating the best reflector and angle, it would seem that a 70°C angle is consistently highest in most of the test. With a reflector angle of 70°C, by 120 minutes, the solar oven was able to heat a pan of water to 78°. resumen El objetivo de esta investigación fue diseñar, construir y evaluar un horno solar que fuera económicamente viable y térmicamente eficiente. Los hornos solares son estructuras en forma de caja que concentran la luz solar natural utilizando reflectores para calentar el agua. Las cocinas solares son una alternativa útil al uso de combustible de carbono y sus efectos sobre la deforestación y el cambio climático. Además del objetivo económico, se buscó determinar el mejor ángulo de reflector para la cocina solar, midiendo los siguientes parámetros: potencia de cocción, eficiencia y efectividad. Se utilizaron lámparas de halógeno para simular la luz solar natural, ya que la condición al aire libre era demasiado variable en el Reino Unido para garantizar la continuidad de la luz solar durante 120 minutos de manera controlada. El ángulo del reflector que ofrece mayor capacidad para convertir la insolación solar en energía térmica es de 60 grados. Sin embargo, los datos muestran que el ángulo del reflector de 70 grados produce una temperatura mayor y a la vez constante. Con un ángulo de reflector de 70 grados, por 120 minutos, el horno solar fue capaz de calentar una cacerola con agua a 78 grados Celsius.

The possibility of developing hybrid PV/T solar system

“…Thermal panels are usually made of copper pipes with flat absorber and the different quality of surface absorption. Considering the advantages and disadvantages of existing solutions, to increase efficiency and improve the design, the new solution for thermal panel is designed [2]. It takes into account the weight of the panel, primarily due to the load on the roof or facade construction, which can be significant, especially if the larger number of panels are installed [3].…”

Performance assessment for mountain bike based on WSN and cloud technologies

“…RFID uses a passive device (called an RFID tag) to communicate data using radio frequency (RF) through electromagnetic induction (Dobrnjac, 2016).…”