This paper proposes a new eco-refrigerant according to the European Union legislation, Montreal and Kyoto Protocols. This new refrigerant, dimethyl ether (DME), it is environmentally friendly, with zero ODP and insignificant GWP. This refrigerant is proposed to be used as a working fluid in air conditioning, domestic and commercial refrigeration systems. The group involved in this work consists in 2 Romanian national universities, the Romanian Producer

With the continuous rising of oil prices and the limited petroleum resources, a higher importance is given to bio-fuels that are a renewable source of energy and do not contribute to the overall increase of the green house effect. Internationally, extensive research was performed over the years to establish the Coal-oil mixtures (COM) and Coal-water mixtures (CWM). On the other hand, bio-fuels obtained from biomass have a high potential for CO2 protection

: In Eco-Technology Research Center of Rits University, comprehensive research was done to develop the industrial production of water-polymer fuel emulsions and to apply them for combustion in power generating plants instead of traditional fuels. The employment of water-polymer fuel emulsions is intended to save natural resources (heavy fuel oil) and would reduce NOx emissions into the atmosphere during combustion. In the experiments, automotive

A new recycling system for waste plastics was developed, in which waste plastic and heavy oil are mixed to produce an alternative fuel for power generation systems. It was found that for the injection of mixture fuel, heating at temperatures around 150 deg. C, was needed for a proper viscosity. In the present study, the emulsification of waste plastic and heavy oil mixtures with water is examined. Using a surfactant, emulsions of polypropylene (PP)

A new recycling system for waste plastic is proposed, in which waste plastic and heavy oil are mixed to produce new fuel. In our previous work [1,2], we pointed out that the mixture fuel, at temperatures around 150 deg. C, is suitable as an alternative fuel for diesel generation systems. The mixture fuel, however, is difficult to handle due to hardening at room temperature. In this study, the emulsification of waste plastic and heavy oil mixtures

A variable intake system able to develop in cylinder meridian plane a tumble motion coupled with a stratified charge of the fresh mixture was experimentally investigated. Several configurations of intake manifolds that developed a tumble motion for the mixture charge were designed and tested on a production engine for full load and speed map. The s.i. engine's overall efficiency and pollutant products were analyzed by comparison, for the original

In this book are presented the results of the mathematical modeling, computer simulation and experiments on the fluid flow in the Internal Combustion Engine and the turbulent kinetic energy characteristics that result from this type of motion. 1. The book mathematical support conceived and developed to describe the gas dynamics phenomenon and wave's propagation for low Mach numbers was consisted of the mathematical modeling of the second order partial

The need of fast ships with more powerful and efficient engines at lower speeds, coupled directly to the propeller, gave an impulse for more developing of long stroke high m.i.p. low speed two stroke Diesel engines. An important direction of research is the shafting and structures vibration. As the engine torque increased continually due to higher bore, stroke and m.i.p., the excitation and the supplementary stresses due to vibrations showed the