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Influence of heat pipe operating temperature on exhaust heat thermoelectric gen...
Brito, F. P.; Martins, Jorge; Gonçalves, L. M.; Antunes, Nuno; Sousa, DiogoIncreasingly stringent targets on energy efficiency and emissions, as well as growing vehicle electrification are making attractive the electric recovery of the energy normally wasted through the tailpipe of Internal Combustion Engines. Recent developments in thermoelectrics (TE) may soon make them a viable solution for such applications. This team has been exploring the potential of using TE modules in combin...
Experimental comparison of the performance of a journal bearing with a single a...
Brito, F. P.; Miranda, A. S.; Claro, José Carlos Pimenta; Fillon, M.It is often assumed that a journal bearing will operate more effectively with a twin groove arrangement than a single groove one, but little evidence has been presented in support of this. An experimental assessment of a journal bearing with either one or two axial grooves located perpendicularly to the load line was performed. It was found that under heavy loaded operation the twin groove configuration might a...
Temperature controlled exhaust heat thermoelectric generation
Brito, F. P.; Martins, Jorge; Gon??alves, L. M.; Sousa, R.The amount of energy wasted through the exhaust of an Internal Combustion Engine (ICE) vehicle is roughly the same as the mechanical power output of the engine. The high temperature of these gases (up to 1000??C) makes them intrinsically apt for energy recovery. The gains in efficiency for the vehicle could be relevant, even if a small percentage of this waste energy could be regenerated into electric power and...
Carros Elétricos
Martins, Jorge; Brito, F. P.Ficha técnica da publicação. Podem ser vistas páginas de exemplo em http://www.engebook.com/2/7707/Carros-Electricos ; Esta é a primeira obra ilustrada abrangente dedicada aos carros elétricos. O livro pretende ilustrar a história dos veículos elétricos, desde a altura em que surgiram e se tornaram líderes de mercado (no virar do século XIX para o XX) até aos nossos dias, em que parece terem ganho um novo "fôl...
Thermoelectric exhaust energy recovery with temperature control through heat pipes
Martins, Jorge; Brito, F. P.; Gonçalves, L. M.; Antunes, JoaquimCurrently, a great deal of the automotive industry’s R&D effort is focused on improving overall vehicle environmental and energy efficiency. For instance, one of the things that Electric Vehicles (EVs) and Hybrid cars (HEV) have in common is the recovery of waste energy, namely during braking. But, when an I.C. engine is operating (e. g. as a range extender in an EV), a large amount of energy is also wasted wit...
Modelling of thermoelectric generator with heat pipe assist for range extender ...
Brito, F. P.; Martins, Jorge; Gonçalves, L. M.; Sousa, R.Recent trends towards electrification of vehicles favour the adoption of waste energy recovery into electricity. Battery-only Electric Vehicles (BEV) need a very large energy storage system so the use of a Range Extender (RE) may allow a significant downsizing of these bulky components. The Internal Combustion Engines (ICE) have two major discarded energy fluxes, engine cooling and exhaust gas. In Extended Rang...
An experimental study of the influence of loading direction on the thermohydrod...
Arab-Solghar, A.; Brito, F. P.; Claro, José Carlos Pimenta; Nassab, S A GandjalikhanAn experimental assessment of the influence of the angle between the groove axis and the load line on the thermohydrodynamic behaviour of twin groove hydrodynamic journal bearings has been undertaken. At nine different loading direction angles, the oil–bush interface temperature profiles, oil outlet temperature, maximum bush temperature, total flow rate, and oil flow rate through each groove were measured for v...
The role of lubricant feed temperature on the performance of twin groove journa...
Brito, F. P.; Miranda, A. S.; Claro, José Carlos Pimenta; Fillon, M.An experimental assessment of the influence of lubricant feed temperature (Tf) on the behaviour of twin groove hydrodynamic journal bearings has been undertaken. Several loads, shaft speeds and bearing geometries were tested under constant lubricant feed pressure (pf), while Tf took four different values between 29ºC and 58ºC. It was found that the increase of Tf has an effect in bearing performance which is an...
Heat-pipe assisted thermoelectric generators for exhaust gas applications
Gonçalves, L. M.; Martins, Jorge; Antunes, Joaquim; Rocha, Romeu; Brito, F. P.Millions of hybrid cars are already running on our roads with the purpose of reducing fossil fuel dependence. One of their main advantages is the recovery of wasted energy, namely by brake recovery. However, there are other sources of wasted energy in a car powered by an internal combustion engine, such as the heat lost through the cooling system, lubrication system (oil coolers) and in the exhaust system. Thes...
A Survey on Electric / Hybrid Vehicles
Ribeiro, Bernardo; Brito, F. P.; Martins, JorgeDOI: 10.4271/2010-01-0856 ; Since the late 19th century until recently several electric vehicles have been designed, manufactured and used throughout the world. Some were just prototypes, others were concept cars, others were just special purpose vehicles and lately, a considerable number of general purpose cars has been produced and commercialized. Since the mid nineties the transportation sector emissions ar...
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