This paper examines different simulation and engine test resu10 mwerange with differing lts in the 1 performance objectives. Electric turbo compounding etc is a promising technology for gasoline engine exhaust energy recovery. Incremental price for mechanical turbocompounding for class 8 line haul trucks a lower incremental cost for the technology was predicted as part of the 2016 phase 2 ghg emission and fuel efficiency rulemaking for heavyduty vehicles that was jointly promulgated by the epa and nhtsa 3811. In this paper, a new electric turbocompounding layout called electricbooster and turbogenerator system ebtg was established and studied in a 1.
In mechanical turbo compounding, waste energy from the exhaust is recovered and converted into kinetic energy via the addition of a second turbine. On this mechanism, the exhaust gas flow is used to rotate the alternator. Kers, and electric turbocompounding, which recovers and recycles exhaust gas heat energy from internal combustion piston engines. Compounding of steam turbines is the strategy in which energy from the steam is extracted in a number of stages rather than a single stage in a turbine. Recently, in literature the possibility of having an energy recovery, thanks to the turbo compounding, in the form of electrical energy, has gained interest. A holset power turbine works handinhand with the holset turbocharger by driving power back through the crankshaft and extracting energy from the exhaust stream. An example of an etc system is where a turbogenerator is located downstream of a turbocharger turbine of an internal combustion engine ice. The power that does exist on the continent is further threatened. Comparative study on electric turbocompounding systems. In the absence of sufficiently stringent standards, innovative technologies depend on incentives to accelerate initial market penetration. Turbo compounding is the process of using a turbo run off exhaust gasses to provide additional power to the crankshaft via gearing or a hydrodynamic coupling, or to power a generator that.
In this case, the turbine produces more power than the one necessary to drive the compressor and the excess power is converted into electric power using a high speed. Helping make distributed power systems more efficient. Turbo compounding, a technology whos time has come pdf. Comparative study on electric turbocompounding systems for.
Turbocompounding, turbochargers tech talk cycle world. Finally, the work presents an electric turbo compounding etc simulation using a ford ecoboost as a baseline engine modeled with the 1dimensional avl boost software. This is called turbocompounding, and the tc in tc18 stood for guess what. Cases that increase electrical output, electrical efficiency and transient response are discussed and evaluated. Home etc for open genset open genset efficiency improvement. Proceedings of the asme 2016 internal combustion engine division fall technical conference. Simulation study on electric turbocompound etc for. Africas intermittent power supply has been identified as a key limiting factor to its economic growth. What is electric turbo compounding etc and how can it help. Technology delivery process advanced engineering john. In a twin turbo system, the two turbochargers that compress the air are the same size, and they are set up to split the job of feeding air into the intake between them. One of the effective way to reduce fuel consumption and electric turbo compounding system etcs has been researched globally. The improvements in fuel efficiency help keep the engines cleaner, reducing emissions, including black smoke and reducing maintenance costs. Open genset solutions electric turbo compounding etc.
Todays engines reject 40% of the fuels energy in the exhaust gas stream. Turbo compounding is used currently in truck engines by detroit diesel and volvo, but they are suited to long haul applications where the engine is at a constant revsload, the power turbine it is said extracts up to 50 horsepower to put back into the crankshaft but the trade off as explained earlier is increased exhaust backpressure meaning the pistons have to push harder to get the. With this system, about 30% exhaust gas can be recycled as a power source. Pdf electric turbocompounding system attracts more attention in recent years with the advance of electronic control devices. Asme 2016 internal combustion engine division fall technical conference. Turbocompound engine wikimili, the free encyclopedia. Heavyduty engine electric turbocompounding manuel kant. Electric turbo compounding etc simulation using ford ecoboost base line engine with modification using hyboost modelled with avl boost software was carried out for the analysis. Pdf electric turbo compounding applied to a ci engine. During low engine speed, since the energy from exhaust gas is insufficient. The electric turbo compounding systems have inherent technological benefits over mechanical turbo compounding systems.
The electric turbo compounding etc system is an ideal way to improve the efficiency of an open genset, including gas and dieselfuelled engines. Simulation study on electric turbocompound etc for thermal energy recovery in turbocharged internal combustion engine alias mohd noor1, 2, a. Turbo compounding is a type of waste heat recovery that uses a turbine run off exhaust gases to provide additional power to the crankshaft via gearing or a hydrodynamic coupling, or to power a n electric generator that distribu tes energy via a power. Evaluation of electricturbocompound applied to marine dieselengines for waste heat recovery october 4th, 2018 prof richard bucknall ucl presenter. There is a chance of using power generators to produce electric power. Why turbo compounding may be the next big thing in. A system that converts waste exhaust energy to shaft work, using a turbine, and couples it back to the engine, electrically. A system that converts waste exhaust energy to shaft work, using a turbine, and couples it.
Bowman power group unique electric turbo compounding technology duration. The increasing demands of ancillary electrical equipment and the rise of hybrid powertrain vehicles have led to a growing electrical energy requirement in vehicle. The exhaust gases represented in red are i n 2008, the fia enforced the. Most recently, mts has supplied high power density, low weight electric motors for use as permanent drives in allelectric racing cars. An engineelectric generator system includes an internal combustion engine, a primary electric generator driven by an output shaft of the engine and providing electrical power. Us7047743b1 electric turbo compound configuration for an. Comparative study on electric turbocompounding systems for gasoline engine exhaust energy recovery conference paper pdf available october. Pdf simulation study on electric turbocompound etc for. Not every turbocharger system that utilizes two compressors is a twin turbocharger system. The simulation results show a 3% reduction in brake specific fuel consumption bsfc, 0. Study of the electricbooster and turbogenerator system. Electric turbocharging for energy regeneration and increased. Pdf a large proportion about 33% of the fuel energy is lost through exhaust gas in a gasoline engine.
Electric turbo compounding technology update author. System a has an electricassisted turbocharger, system b has a turbogenerator. There are mainly three kinds of electric turbocompounding systems for internal combustion engines. The turbo compounding mechanism will be coupled to the crank shaft of the engine via two different techniques, hydrodynamics coupling or by using the gearing technology. An example of an etc system is where a turbogenerator is located downstream of a turbocharger turbine of an. Electric turbo compounding etc technology is our solution to the challenge of improving energy efficiency for the stationary power generation industry. The second configuration is based on coupling an electrical generator to the tc shaft for extracting excess power produced by the turbine electric turbo compound. Scania 59 figure 45 electric turbocompounding source. Turbocompounding is the use of a power turbine to extract additional energy from the exhaust. Its good for about 435 horsepower and 660 lbft of torque, which is great, but the fun doesnt stop there. Pdf comparative study on electric turbocompounding.
The fuel consumption reduction in transportation fields is a critical issue in the whole world. The turboelectric turbocompounding system 10 may further incorporate a provision for detecting if the electrical load on the synchronous 56, 56. Turbo compounding is the use of a blowdown turbine in the exhaust flow to recover energy which would otherwise be lost to atmosphere. Electric turbocompounding system attracts more attention in recent years with the advance of electronic control devices. Therefore, this system is effective for engine systems with purposes such as downsizing and increasing efficiency of the system. Both radial and axial power turbines are available for a variety of heavyduty applications. To effectively recovery the energy in exhausts and improve the transient performance of internal combustion engine. Volvo trucks new turbo compounding, available on our d engines beginning mid2017. The etc installation is designed to prevent the produce of a back pressure effect which disturbs the engine performance. The article was created because there is a great deal of confusion with regards to the terminology and many web resources incorrectly consider it a form of twin turbo system. Regional outlook geographically, the global turbo compounding systems market can be divided by major regions which include north america, latin america, western and eastern europe, asia. Our etc products make gas and dieselpowered gensets work more cleanly and effectively, by recovering waste energy from the genset exhaust to improve power density and fuel efficiency.
A validated 1d engine model was used to investigate the impact on the brake specific fuel consumption bsfc and brake mean effective pressure bmep at full load. Mechanical and electromagnetic analysis of high speed. In heavyduty engines, series turbocompoundingwhere a power turbine is connected in series with turbocharger turbineis the most important configuration. The concept behind electric turbo compounding isnt new the aerospace industry began using mechanical turbo compounding in the 1940s in an effort to maximise efficiency. The utilization of exhaust gas flow with electric turbo compounding etc mechanism is applied on this research. Audi made the concept to show off the potency of electric turbochargers, saying that the technology is close to. Pdf comparative study on electric turbocompounding systems. Cybersecurity solutions help safeguard connected vehicles. Turbocompounding systems with calnetix magnaforce motor generators enable 7 to 8 percent more power to be produced from existing gensets or the same power to be produced from smaller gensets. Comparative study on electric turbocompounding systems for gasoline engine exhaust energy recovery. Pasini, gianluca, frigo, stefano, and antonelli, marco. Garrett is pioneering eturbo technology to deliver superior performance, fuel economy and emissions, by integrating stateoftheart, ultra highspeed electric motors and power electronics into its turbocharger product families. Comparative study on electric turbo compounding systems for gasoline engine exhaust energy recovery conference paper pdf available october 2010 with 1,162 reads how we measure reads. These generators will also run via turbo compounding.
Pdf download for heavyduty engine electric turbocompounding. A turbocharger has a first turbine driven by exhaust gasses from the engine and a compressor driven by the first turbine and provides inlet air to the engine. Currently, mts offers electric motors capable of delivering from 1 to 250 kw. Future turbo tech electric turbo compounding aet turbos. Ac generator becomes disconnectedfor example, as a result of failure of either the synchronous 56, 56. Electric turbocompounding the mechanical turbocompounding technology has been utilized in diesel engines, but the system hardware is rather complex. In compound turbocharged systems, you again have two compressors, but unlike in. An electric turbocompound system with a lowpressureratio turbine is. Turbocompounding is the use of a turbine as one of the sources and the engine as the other to produce one output.
Evaluation of electricturbocompounding technology applied to marine dieselengines for waste heat recovery 1. Compounding is the use of two or more sources to produce a single output. Mechanical turbocompounding has been used commercially in diesel engines for various applications for many decades. An electric turbo compound etc system is defined where a turbine coupled to a generator. Electric superchargers how audi is eliminating turbo lag. Figure 43 volvo d12d 500hp euro 3 engine turbocompound set up source. Pdf optimization of an electric turbo compounding system. One of the effective way to reduce the problem, electric turbo compounding system has been researched globally. Turbo compounding can provide dramatic savings through fuel efficiency improvements of up to 6. John deere 60 figure 46 fuel consumption based on combined engine shaft and electrical power. One turbo is a traditional exhaustdriven type, while the other is an electric unit.
In this paper, optimization of an etc system for turbocharged gasoline engines is carried out. Exhaust energy recovery with turbo compounding in a. An electric turbo compound etc system is defined where a turbine coupled to a generator turbogenerator is located in the exhaust gas flow of a reciprocating engine to harvest waste heat energy and convert it into electrical power. Electric turbocompounding application to gas engines for. System a has an electricassisted turbocharger, system b has a turbogenerator that is in series with the turbocharger, and system c has a turbogenerator that.
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