In the Paris agreement about climate change, it was established that greenhouse gas emissions must be reduced by 0% in order to avoid irreversible damage, so the world economy based on fossil fuels must undergo a transformation towards an economy clean, safe and sustainable. As a result, it has been established that the only alternative that guarantees 0% emissions of polluting gases is the economy of hydrogen. Countries such as the Netherlands, the United States, and the European Union have projected policy towards 2050 that expects to meet the objectives set out in the Paris agreement. In this document shows the different alternative fuels that are currently being proposed to mitigate polluting emissions, as well as the overview of these fuels in Colombia, and how, from the different renewable energy sources that this country has, could venture economically and politically towards economy based on the use of hydroxy and hydrogen as a raw material and energy source, showing its possible applications. The foregoing will allow to identify the potential of application of these fuels in the energy matrix of Colombia and define policies to accelerate their implementation.
Internal combustion engines only take advantage of a quantity of the energy available in the combustion process. In addition to this, the emissions generated alter the balance and natural composition of the air, which represents a current risk to human health. Because of this, to reduce the dependence on fossil fuels and minimize the harmful emissions to the environment of this type of thermal machines, in this work, the implementation of an exhaust gas energy recovery system is proposed. With the recovered energy, is hydroxy through the electrolysis process, and so that partial substitution of diesel fuel with the gaseous fuel produced. For the experimental study, a diesel engine SOKAN SK-MDF300 is coupled to a thermoelectric generator formed by Peltier modules, which transform thermal energy into electrical energy. This energy was used to generate hydroxy, reaching a generation maximum of 1.37 L / min. The influence of the partial substitution using diesel fuel and B10 fuel was studied. The experimental results allow us to conclude that a 3% reduction in fuel was achieved with diesel fuel. In addition to this, CO2 emissions were reduced in 13%, CO in 11.66%, NOx in 35.38%, SOx in 14.84% and 21.69% of reduction in smoke opacity, in the condition of maximum load during the test in the engine. The implementation of the TEG, coupled with the HHO gas generation system increases the overall efficiency of the engine by 4.2%.
One of the areas of greatest interest in engineering is the conversion of heat into useful work because society consumes large amounts of energy. In this paper, a theoretical study of the simple Rankine cycle, regenerative and cogeneration is presented, to verify the set of operational parameters that allow maximizing the output power of a power generation facility. For the theoretical modeling, the Powercycle® software was used, which can predict the output conditions of a Rankine power cycle depending on the configuration, input values and pressure in the boiler. With the purpose to verify the results obtained with regeneration and cogeneration, a comparison was made of the results obtained with a simple Rankine cycle. It was determined that, with the increase of the temperature and the pressure at the entrance of the turbine, the efficiency of the cycles increases. Note that an increase in temperature means more heat entering the process, but the delta of work in this case is greater, while it was verified that the Powercycle® computational tool allows optimizing the performance of Rankine cycles under different operating configurations. Keywords-Cycle, Efficiency, Model, Rankine, Simulation I. INTRODUCTION A power cycle is a thermodynamic cycle in which heat is converted into work. There are different types of cycles depending on the working fluid, heat transfer mode and operational variables. In the case of steam power cycles, the working fluid is water, which changes from liquid phase to vapor phase depending on the analysis point in the installation. The continuous improvement of power generating systems has led to some innovative modifications in the Rankine basic power cycle [1]-[2]-[3], in order to increase the thermal efficiency of power generating systems[4]-[5]-[6]. In recent years these improvements have been focused on different fronts. Recently, many studies have focused on the application of the Rankine cycle (RC) to recover low quality waste heat. According to Zhou On-road vehicles, which convert about a third of the fuel energy into mechanical energy useful for propulsion, are moving energy conversion systems that generate considerable waste heat. This paper identifies the characteristics of the waste heat sources found in vehicles and the restrictions placed on the automotive RC application. Rankine's cycle architectures, system components and working fluids suitable for different applications are summarized, providing guidance for the future design of the RC system in automobiles[7]. Hofmann and Tsatsaronis describes an analysis of a binary and a conventional Rankine cycle for a coal-fired power plant. The main question asked in this research is whether it is possible to compensate the higher expected capital investment associated with additional components for lower fuel consumption during operation. The exergoeconomic comparative analysis shows that the concept of a binary Rankine cycle is suitable for reducing fuel and emissions and economically viable[8]. The Rankine cycle is considered t...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.