A world overview of organic Rankine cycle as waste heat recovery alternative

Abstract

In this work the advantage of the use and implementation of ORC heat recovery systems for low temperature (<230°C) exhaust gases from a natural gas engine was studied. Different organic fluids and working conditions were analyzed in order to determine the best decision in terms of energy efficiency and exergética refers to criteria such as cost, environmental impact, flammability toxicity among others. It was found that the performance for the different configurations is closely linked to the evaporation pressure, reaching an electrical power of 120kWe (10%) for the simple configuration. The working fluid with the highest performance was acetone regardless of the configuration analyzed. Simultaneously, an international and national context was created in different fields for heat recovery systems.

Study of the influence of material properties in the energy conversion process of thermoelectric generators for waste heat recovery applications

“…Although the world is becoming increasingly aware of the importance of protecting the environment, the use of fossil fuels remains the main source of energy supply [1], [2]. As a consequence, greenhouse emissions produced by energy systems powered by fossil fuels represent a socio-environmental problem.…”