Experts in Exhaust Energy Recovery
A Brief History of Turbo Compounding
1948 irst order for Turbo Compounding F issued by the US Navy to Wright Aircraft Engine Company
1950s Innovations in the Aerospace Industry lead to Turbo Compounding. Adopted in aircraft engines by Lockheed, Canadair, Martin and Fairchild plane makers
1980s Cosworth Engines based in the
Bowman Power Group Ltd
is the world leader in advanced exhaust energy recovery technologies for reciprocating engines, which dominate distributed power generation in both grid and off-grid applications around the world. Responsible for pioneering advances in Electric Turbo Compounding (ETC), we are working with leading global engine manufacturers, system integrators, value added resellers and our customers to improve genset electrical efficiency; saving fuel or increasing output while reducing emissions.
UK develops Turbo Compounding technology primarily for motorsport F1 racing engines
1990s Heavy truck diesel manufacturers Scania and a few years later Volvo incorporate Turbo Compounding into their engine designs
2004 Bowman Power starts designing Electrical Turbo Compounding (ETC) for the heavy truck Industry with USDOE Funding
2009 Bowman Power switches to designing and manufacturing Electric Turbo Compounding Systems (ETC) for the power generation industry
2013 Mercedes-Benz introduce Turbo Compounding in their truck engines
2014 Formula 1 (F1) adopts Electric Turbo Compounding technology as part of new electric turbocharged engines
Less Fuel more power
From our headquarters in the United Kingdom, our engineering team applies our proven ETC solution to a variety of engines and fuel types, while our design team continuously improves our designs and develops more advanced ETC systems for a growing range of
We at Bowman Power pride ourselves on the efficiency, reliability and ingenuity of our ETC systems. With over 600 systems installed and over 8,000,000 operating hours, our systems are field proven; saving energy and reducing emissions around the globe. Bowman Power’s Electric Turbo Compounding (ETC) system works by taking advantage of the waste exhaust gases produced by reciprocating engines and converting electrical energy while reducing carbon emissions. Our ETC systems can produce up to 7% specific fuel savings and up to 10% more power on a diesel genset. For gas engines, our ETC systems can produce up to 6% specific fuel savings and up to 6% more power. As a result, engines can become much more efficient overall while at the same time leaving a greener carbon footprint.
Bowman Electric Turbo Compounding (ETC) system installed on a Cummins KTA50 genset
Up to 7% less fuel
reciprocating engines.
Electric Turbo Compounding Technology In a reciprocating engine, typically only 40% of the fuel energy is converted into useful power, the remainder being wasted, in roughly equal measure, to the exhaust gases and engine cooling system.
The TG (sectioned view above), incorporates a very compact, high speed (>30,000rpm), high efficiency (>98%) direct drive electrical alternator. The TG has its own self-contained oil system, providing both lubrication and cooling. The existing turbocharger is replaced with a high efficiency model that is correctly matched to the TG downstream to optimize the energy recovery.
The Bowman ETC system introduces an additional turbine after the turbocharger to recover a portion of the waste heat energy from the exhaust stream. The turbine is directly coupled to a high speed alternator and the combined unit is termed a “Turbogenerator” or TG.
A separate Power Electronics panel provides all control functions and conversion of the alternator output to grid quality 50 or 60Hz 3 phase power.
Less Fuel more power
att Butcher, Principal Support M Engineer, Bowman Power
BSFC vs System Power 215
BSFC - g/kWhe
210
engine baseline testing
205
8.5%
200 195 190
8.5%
6%
engine testing with TG IInstalled
185 400 500 600 700 800 900 1000 1100 1200
System power-kWe
Bowman ETC system, tested on Cummins KTA-50 G3, 50Hz generator set at Cummins’ Ramsgate (UK) facility.
Less Fuel, More Power The total output electrical power can be held constant with the ETC system providing a portion of the total electrical output. As a result, the engine power will be reduced, resulting in a fuel saving. Alternatively, the total fuel input can be held constant with the base engine power output slightly reduced due to a small increase in back pressure arising from the additional exhaust turbine. However, this is more than offset by the additional power generated by the TG; the net effect is more electrical power from the same amount of fuel.
Up to 10% more power
“ Our bespoke remote diagnostic software and dedicated in-house support team enable us to provide global, aroundthe-clock support to our customers. This infrastructure ensures a quick, reliable and efficient response, resulting in maximum system uptime for our customers.”
Solutions Bowman Electric Turbo Compounding system installed on a Mitsubishi S6R engine is shown above and below
All Bowman products are covered by our standard warranty for a period of 12 months from commissioning or 15 months from delivery. Longer warranties are available on request.
The commercially available and proven Bowman ETC systems are already providing engine operators with increased fuel efficiency, and a number of systems are in development to provide reduced fuel consumption and increased fuel efficiency for several more popular engine models of diesel and gas engines. We are proud to offer systems compatible with a number of the world’s major engine manufacturers, including Wärtsilä, Cummins, Caterpillar, Scania, Volvo, Mitsubishi, MAN, and GE Jenbacher. Driven by customer demand, we are continually adding engine manufacturers to this list.
Global Coverage Together with our global distribution partners we are meeting the needs of our customers, with over 600 Bowman Power Electric Turbo Compounding Systems (ETC) installed on both open and containerised Distributed Power Generation Systems in the following countries; • Australia
• Indonesia
• Germany
• Switzerland
• Belgium
• Saudi Arabia
• Italy
• USA
• Luxemburg
• France
• Czech Republic
• Turkey
• Finland
Less Fuel more power
Depending upon genset utilsation (> 4,000 hours per year) and fuel or electricity prices, Bowman’s Electric Turbo Compounding (ETC) systems can deliver payback times of 1 to 2 years in fuel savings mode or increased power output mode. Typically, ETC applied to diesel engines adopts the fuel saving mode due to the higher cost of diesel fuel, whereas gas engines utilise the increased power mode of operation to take advantage of high electricity prices and/or Feed-In-Tariffs (FITs). Less Fuel or More Power, Bowman ETC systems can be a valued addition to your fleet and increase your competitiveness with a unique solution. The resulting Levelised Cost of Electricity (LCOE) for the Bowman ETC systems is around 5-6 US cents/kWh, making Bowman a valued upgrade to your genset.
Application Distributed power generation applications are tailored to the supply of continuous power for a range of high-speed generators from 200KWe up to 1,500KWe for IPP applications, isolated grid applications, such as remote communities, mines, isolated energy intensive industries, CHP and co-generation applications, landfill and sewage gas applications, and engine-driven pumps and compressors. Typical applications include various fuel types, such as liquid fuels (diesel, biofuels, or mixed) and gaseous fuels such as natural gas, biogas and syngas.
New Installation & Retrofit Bowman ETC systems are suitable for installation on first fit or retrofit applications with open sets or within power solutions containers. Once installed, the ETC system synchronises automatically to the grid and quickly adapts to load changes. Furthermore, the maintenance requirements and lifecycle costs are minimal and can be easily supported by site staff.
Reduced Carbon Emissions Bowman systems also helping to meet important challenges in the areas of emissions reduction and energy efficiency. When running a Cummins KTA50-G3 fitted with a Bowman ETC system customers can reduce diesel fuel consumption by up to 155,000 litres/year while avoiding up to 400 metric tonnes of CO2 per genset annually.
Financing Bowman has several options for financing our ETC systems ranging from leasing models to an ESCO (Energy Service Company) with a power purchase agreement. Solutions can be tailored to provide positive cash flow from day one.
Payback under 24 months
Added Value
Bowman Power Group Ltd Ocean Quay, Belvidere Road, Southampton, HANTS, UK, SO14 5QY Telephone: +44 (0)23 8023 6700 Email: salesteam@bowmanpower.co.uk
www.bowmanpower.com
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