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TIGERS: Exhaust Gas to Electricity for Reductions in Fuel Consumption

Tigers_yellowtrans
TIGERS. The switched reluctance generator is in yellow.

British engineers have developed a simple mechanism for recovering energy from engine exhaust gases that could potentially reduce vehicle fuel consumption by up to 10%.

The TIGERS—Turbo-generator Integrated Gas Energy Recovery System—consortium (a Foresight vehicle project) diverts exhaust gases to drive a small switched reluctance generator to create enough electricity to power a car’s electrical system.

The small turbo-generator is installed in a by-pass waste pipe fitted just below the engine exhaust manifold. A valve linked to the engine’s management control system allows some of the high-energy exhaust gases to pass through a turbine to drive the generator, depending on engine load conditions.

Typically the 800º C gases have a velocity of 60m/s and a mass flow rate of 0.05 kg/s, providing enough energy to spin the generator at up to 80,000 rpm and create electrical power of up to 6kW—sufficient to handle the car’s electrical systems.

An energy management system will ensure optimal utilization of the available energy. During highway driving, when the available exhaust energy is high, the energy will be captured and the excess power will be stored in a battery. However, at engine idle the penalty for recovery is high and so the vehicle will be operated in battery only mode.

The researchers have looked at placing the new generator at various locations along the exhaust system. Placed too far away from the engine, the waste gases start to lose energy, so in the development stage the generator has been placed just beneath the exhaust manifold to maximize energy recovered. The gases then pass through the catalytic converter after the turbine, to ensure that the gases can still be conventionally cleaned.

By placing it close to the manifold the energy available is optimized. This also allows for shorter runs for control leads and coolant pipes and provides greater protection to the unit. Disadvantages are that the high temperatures mean the generator has to be water-cooled and totally sealed. However, the researchers are convinced that they can fully develop the system and plan to have a fully operating prototype ready for bench testing within a few months.

Because the system is fairly simple and partly based on existing technology, it could be fully developed for all car, van, bus and truck engines within a few years.

The simple design of the switched reluctance generator enables a low cost and easy to manufacture unit to be built that can run reliably at high speeds. It gives the TIGERS device a power density of approximately three times that of a typical alternator. An efficiency in excess of 80% can be achieved compared with 60% for traditional technology.

Dr Richard Quinn, one of the engineers leading the TIGERS project, says the system could be developed to produce anything from 12v to 600v.

The recovered energy could power all of a car’s heating, lighting, air conditioning and in-car entertainment systems. Longer term, the cam belt, drive belts and alternator could be scrapped with the TIGERS-recovered power providing electrical drive instead for further potential for gains in engine efficiency.

The additional electrical energy could be used to power more advanced engine technologies, such as electro-magnetic valve actuation, electric intake charge cooling, electric-powered super-charging or electrical exhaust after-treatment.

Parasitic losses from mechanical support systems (i.e., belt-driven) can normally be as high as 6kW or 8hp in a family sedan but can be significantly higher in larger capacity cars and trucks. Moving from those mechanical systems to electrical removes those loses, and fuel consumption could be reduced from between 5%–10%.

In a hybrid electric car the TIGERS system could feed the extra power directly to the drive motors or back to the battery to increase the range of the vehicle.

On commercial vehicles the extra electricity could be used to power electrical systems to run refrigeration units for chilled food, turn the motors on cement mixers or power pumps on fuel tankers.

The TIGERS group comprises researchers from Visteon UK Ltd in Coventry, Switched Reluctance Drives of Harrogate and The University of Sheffield Electrical Machines & Drives Research Group.

Switched Reluctance Drives is a leader in switched reluctance technology and is developing a high-speed generator to work in this demanding environment. The University of Sheffield research group is applying its knowledge of electrical system modelling and design to optimise the control and energy storage system.

Visteon is the lead partner in the project and is one of the world’s leading Tier 1 automotive suppliers. It is responsible for the system design, testing and implementation.

Resources:

Comments

Sathya

Jus want to know whether it is possible to fix TIGERS in the car which already has TURBOCHARGER in it ? if yes, please explain ?

Sathyanarayana

Please explain how the SRD generator converts the high temeperature exhaust gas into electrical energy (Power)... brief on this....

ted

Hi
Can you send me information of principle starter/generator?

vijay

Can 800º C gases having a velocity of 60m/s and a mass flow rate of 0.05 kg/s,will spin the generator at 80,000 rpm?
can you please explain?
Place the unit at optimum distance from exhaust manifold and eliminate the cooling system.

anil

,
I am a mechanical engg student .I read about TIGERS
that was a innovative thing ,I want to present a paper
on TIGERS in technical paper presentation so please send me more detailed information about TIGERS


anil

,
I am a mechanical engg student .I read about TIGERS
that was a innovative thing ,i need some technical informations about it....ie specifications...


Hiren Soni

when is this Tiger product available commercially ? I live in Chennai - Tamilnadu - India.

yogesh

I AM MECHANICAL ENGG. STUDENT.I READ ABOUT THIS TIGERS. IT IS VERY NICE.I WANT TO PRESENT THE PAPER SO PLEASE GIVE ME MORE INFORMATION ABOUT THIS TIGERS

shailendra singh

i have read this TIGERS .i want to present a paper on this TIGER TECHNOLOGY . pls give me proper knowladge about this

RAJESH KUMAR

I m mechanical engineer i read about tiger it is best technology.

rajesh kumar

Please send further details on TIGERs

bembalkar vijay

congratulations on developing tiger.I will like to know if you have made any efforts towards making this system compulsory fitment for all vehicles freeing mother earth from pollution.Secondly I will like to have an agency for this system please feed me back on this.Name of my Co. is ENERGETIC ENVIRONMENT. Regards.

praveen kumar

hi sir,

i am final year student of mechanical engineering and i am looking for this type of project to work on .So will u plz send me the whole project report on"Exhaust Gas to Electricity for Reductions in Fuel Consumption". So that i can have broader view on this project means how it works what are the mechanism and so.........
i shall be very obliged if u will send this as early as possible on my mail.
thanking you,

praveen kumar
rochester (new york)

PRAVEEN KUMAR.M

sir,
i am a final year B.Tech mech.engg. student. i got an article about

TIGERS from a news paper and search for details on internet.i got a few

details of TIGERS.I wish to do a Seminar on TIGERS so please send me

the full details of TIGERS including design specification, working of

system, SR specification, Material specification, cooling arrangement,

capacitor specification, converter etc..to my mail as early as possble

because i'm suppose to be conducted my seminar after 2 weeks.i hope you

reply soon.
your faithfully
PRAVEEN KUMAR.M
VJCET, Vazhakulam,
Ernakulam (dist),
Kerala, INDIA.

amin

i should be very grateful. if you would like sent me a paper working about jet turbo gas your attenion as a mantion above would be highly appriciated. thanks

amin

i should be very grateful. if you would like sent me a paper working about jet turbo gas your attenion as a mantion above would be highly appriciated. thanks

Ravinder singh

sir,
i m studying mechanical engineering in india.i am very much exicited on knowing your project called TIGERS .so i would like to know more about this,so that i can also involve in this project from india.i would like to be your student ,sir,kindly send me all the information regarding the problems faced by you in this project .so that i can discuss about this project and the problems related to it with the lecturer and students in india.

Ravinder singh

sir,
i m studying mechanical engineering in india.i am very much exicited on knowing your project called TIGERS .so i would like to know more about this,so that i can also involve in this project from india.i would like to be your student ,sir,kindly send me all the information regarding the problems faced by you in this project .so that i can discuss about this project and the problems related to it with the lecturer and students in india.

Anand.B.Poojari

I am a mechanical engg student .I red about TIGERS
that was a innovative thing & I want to present a paper
on TIGERS in technical paper presentation so please send me more detailed information about TIGERS.

Anand.B.Poojari

Sir,
I would like to know the following details of TIGERS.

HISTORICAL BACKGROUND
WHO ARE IN TO THIS?
WHY TIGERS?
STRUCTURE
ENERGY SOURCE
WORKING SYSTEM
APPLICATIONS
ADVANTAGES
TIGERS IN FUTURE

pls provide information regarding above details.
Thanking you....

shamil ayntrazi, PE


Greetings,
Follows is a summary describing the Renewable Energy Wave Pump System. Detailed description is provided under website www.renewableenergypumps.com

Hope it meets with your requirements and leads to improving extraction of wave energy which is becoming a necessity.

Looking forward for your comments and possible cooperation, I remain;

Truly yours

Shamil Ayntrazi, PE
--------------------------------------------------------------------------------------------------------------------------------------------------------

RENEWABLE ENERGY PUMPS
REWAP & REWP
www.renewableenergypumps.com
GENERAL
Periodic undulations in an expanse body of water are a renewable energy source having both potential and kinetic energy in the form of a large volume of fluid at a small head. The idea is to change this energy to a usable form by using simple engineering principles.
Two types of Renewable Energy Pumps are proposed to generate electricity using sea waves as renewable energy source. Both types are patented.
The configuration of the wave pumps and the dimensions of each element depend on site conditions, power and load requirements. The variables are tides, seasonal low and high sea water levels, undulation height, and frequency, contour of the seabed, type of load and power requirements.

This is an invitation to renewable energy and environment conscious decision makers and power generation firms, to further investigate and utilize the proposed systems.
Turbine manufacturers are particularly urged to modify turbine design to utilize the proposed systems.

BRIEF SUMMARY
1. Renewable Energy Wave Air Pump – REWAP
Using the energy in a wave to compresses air in the REWAP and feed it to the air inlet of a turbo-generator to generate electric power at reduced fuel consumption and maintain generator output irrespective of wave heights.
The apparatus proposed for this energy transfer is a Renewable Energy Wave Air Pump (REWAP). The advantages are low capital cost and easy installation, minimum maintenance as there are no moving parts, leveling wave power pulses, maintaining required power output by adding fuel to compensate for reduced wave energy availability, produces less pollutants, does not disturb marine life or shore scenic view and acts as a floating break water structure.
Installing a set of ten REWAP’s units in the path of 4-meter sea waves, 333 sets wide (total 3,330 REWAP’s) in an area measuring 30x1000 meters would pull out and deliver 50 megawatts of energy to the air inlet of a turbo generator.
The cost per KWH is 0.66, compared to a US average cost of 5.37 cents per KWH.

2. Renewable Energy Wave Pump - REWP
When you see an undulation go by, you think of it as the water moving. It is not the water, it’s the kinetic and potential energy within the water that’s making it move. The energy within the wave has a high flow (Q) at a low head (h). The idea is to covert this energy to a low (Q) at a higher head (H) and collect enough Q suitable for operating a large turbo-generator. The apparatus proposed for this energy exchange is called Renewable Energy Wave Pump-REWP.
Installing ten REWP’s in line with apparent path of the fluid undulation would pull out and level pulses of energy up to ninety percent of the undulation energy.
Installing a field of REWP’s up to 1,500 meters long, 30 meters deep, across the apparent path of the fluid undulation, collecting this fluid in a piping network with suction and discharge control valves, and discharging it into a hydro-turbine, may produce power of up to 100 MW.
Depending upon the fluid undulation height and durations, energy with zero fuel consumption and zero emissions, can be generated in excess of 300,000 MWH per year at a cost of 1.74 compared to a US average cost of 5.37 cents per KWH.

ADVERSE CONDITIONS
High waves, if they occur and totally cover the REWAP do not limit the operation of the pump. Water entering into the pump via the suction line would be dissipated into the sea and has no effect. Water vapor in the discharge lines would improve the efficiency of the turbo-generator as it acts as a fogging system.
Variable water elevations due to ebb/tide action and to seasonal sea elevation changes, also do not limit the operation of the REWAP.

Storm Conditions
The REWAP system can withstand storm conditions with no limitation on undulation height, or wind speed. The anchor system keeps the pumps in place and upward lift provided by the pump float limits and resists horizontal swing.

Safety to Navigation
The area at the sea surface is a series of red pump caps clearly visible during the day, and a series of flashing red navigation warning lights clearly visible at night.

ECONOMIC ANALYSIS - REWP & REWAP
Table 2 represents a general solution for the calculation of energy costs per (Kilowatt-hour).

shamil ayntrazi, PE

Greetings,
Follows is a summary describing the Renewable Energy Wave Pump System. Detailed description is provided under website www.renewableenergypumps.com

Hope it meets with your requirements and leads to improving extraction of wave energy which is becoming a necessity.

Looking forward for your comments and possible cooperation, I remain;

Truly yours

Shamil Ayntrazi, PE
--------------------------------------------------------------------------------------------------------------------------------------------------------

RENEWABLE ENERGY PUMPS
REWAP & REWP
www.renewableenergypumps.com
GENERAL
Periodic undulations in an expanse body of water are a renewable energy source having both potential and kinetic energy in the form of a large volume of fluid at a small head. The idea is to change this energy to a usable form by using simple engineering principles.
Two types of Renewable Energy Pumps are proposed to generate electricity using sea waves as renewable energy source. Both types are patented.
The configuration of the wave pumps and the dimensions of each element depend on site conditions, power and load requirements. The variables are tides, seasonal low and high sea water levels, undulation height, and frequency, contour of the seabed, type of load and power requirements.

This is an invitation to renewable energy and environment conscious decision makers and power generation firms, to further investigate and utilize the proposed systems.
Turbine manufacturers are particularly urged to modify turbine design to utilize the proposed systems.

BRIEF SUMMARY
1. Renewable Energy Wave Air Pump – REWAP
Using the energy in a wave to compresses air in the REWAP and feed it to the air inlet of a turbo-generator to generate electric power at reduced fuel consumption and maintain generator output irrespective of wave heights.
The apparatus proposed for this energy transfer is a Renewable Energy Wave Air Pump (REWAP). The advantages are low capital cost and easy installation, minimum maintenance as there are no moving parts, leveling wave power pulses, maintaining required power output by adding fuel to compensate for reduced wave energy availability, produces less pollutants, does not disturb marine life or shore scenic view and acts as a floating break water structure.
Installing a set of ten REWAP’s units in the path of 4-meter sea waves, 333 sets wide (total 3,330 REWAP’s) in an area measuring 30x1000 meters would pull out and deliver 50 megawatts of energy to the air inlet of a turbo generator.
The cost per KWH is 0.66, compared to a US average cost of 5.37 cents per KWH.

2. Renewable Energy Wave Pump - REWP
When you see an undulation go by, you think of it as the water moving. It is not the water, it’s the kinetic and potential energy within the water that’s making it move. The energy within the wave has a high flow (Q) at a low head (h). The idea is to covert this energy to a low (Q) at a higher head (H) and collect enough Q suitable for operating a large turbo-generator. The apparatus proposed for this energy exchange is called Renewable Energy Wave Pump-REWP.
Installing ten REWP’s in line with apparent path of the fluid undulation would pull out and level pulses of energy up to ninety percent of the undulation energy.
Installing a field of REWP’s up to 1,500 meters long, 30 meters deep, across the apparent path of the fluid undulation, collecting this fluid in a piping network with suction and discharge control valves, and discharging it into a hydro-turbine, may produce power of up to 100 MW.
Depending upon the fluid undulation height and durations, energy with zero fuel consumption and zero emissions, can be generated in excess of 300,000 MWH per year at a cost of 1.74 compared to a US average cost of 5.37 cents per KWH.

ADVERSE CONDITIONS
High waves, if they occur and totally cover the REWAP do not limit the operation of the pump. Water entering into the pump via the suction line would be dissipated into the sea and has no effect. Water vapor in the discharge lines would improve the efficiency of the turbo-generator as it acts as a fogging system.
Variable water elevations due to ebb/tide action and to seasonal sea elevation changes, also do not limit the operation of the REWAP.

Storm Conditions
The REWAP system can withstand storm conditions with no limitation on undulation height, or wind speed. The anchor system keeps the pumps in place and upward lift provided by the pump float limits and resists horizontal swing.

Safety to Navigation
The area at the sea surface is a series of red pump caps clearly visible during the day, and a series of flashing red navigation warning lights clearly visible at night.

ECONOMIC ANALYSIS - REWP & REWAP
Table 2 represents a general solution for the calculation of energy costs per (Kilowatt-hour).

sumeet vaishya

hi i m an mechanical student.i m in final year and i want to make a project on "battery recharging system" by using other systems and i come to know abt ur project TIGERS and i think that it can help me lot in making my project so plzz send me some more details regarding ur project. Also plzzz tell the reqirments to be need in a car to apply this technique & how much it will cost to apply it.

Chuck Stone

Wish to purchase a TIGERS unit for research activities. Where can I buy one? Please advise if you know where a purchase can be made.

S.Ravi

Dear Sir, as i came to know about innovation in fuel savings i am impressed i would like to know some technical informations, i.e. i want to run a shaft of 12" to 16" fitted in a cylinder by water pumping only . Here i would like to how to calculate the output RPM of the shaft. will you please help me in this regard. thanking you. kind regards. from s. ravi.

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