Siemens steam turbine for cogen/DH scheme in Latvia

Siemens Energy has received an order for a condensing steam turbine generator to supply the Latvian capital Riga with district heat and electrical energy in the Riga TPP-2 Combined Cycle Co-Generating Facility.

The new cogeneration district heating plant will have an overall electrical capacity of approximately 420 MW and a thermal capacity of 270 MW. The turbine generator will feature three industrial steam turbines, two SST-800 machines and one SST-500 steam turbine, which will be produced at Siemens’ manufacturing plant in Gàƒ¶rlitz, Germany.

The order also includes a generator, a condensing plant, and three district heat exchangers. In summer, the turbine generator unit will provide an electrical output of 145 MW and in winter a thermal output of 249 MW, combined with an electrical output of 125 MW.

The steam turbine generator is unique in terms of its complexity and flexibility, says the company. The turbine configuration and the use of three district heaters allow a precise adjustment of the turbine generator performance to the actual heating demand. During the summer months or during periods with low heating demand the third SST-500 steam turbine in the train can be shut down.


Three Foster Wheeler steam generators for China

China’s Sinopec Wuhan Company has awarded a contract to a subsidiary of Foster Wheeler’s Global Power Group for the design and supply of three circulating fluidized-bed (CFB) steam generators for a proposed cogeneration plant for the 800,000 tonne/year ethylene manufacturing project in central China’s Wuhan city.

Foster Wheeler will design and supply the three 80 MWe CFB steam generators and auxiliary equipment, and provide site advisory services for the project. The CFB steam generators will be designed to burn coal and petroleum coke while meeting all environmental requirements.

Commercial operation of the new steam generators is scheduled for second quarter 2012.


GE launches two-stage turbocharged gas engine

GE has achieved a one percentage point improvement to the efficiency of its flagship, 24-cylinder Jenbacher J624 gas engine by the development and application of two-stage turbocharged gas engine technology. The new engine also provides a 10% output increase, compared to the single turbocharged version, and is particularly well-suited for operation in hot environments and CHP applications.

Click to Enlarge

The new engine was introduced at a launch event held at GE’s Jenbacher headquarters in Jenbach, Austria, at which representatives from the pilot customer for the first new engine, Red Harvest, a large Dutch greenhouse plant operator, were also present. Introduced in 2007, the J624 is the world’s first 24-cylinder gas engine for commercial power generation.

With the new system, which GE developed with specialists from ABB Turbo Systems, the J624 achieves an increase from 4 MW to 4.4 MW and offers an electrical efficiency of 46.5%, an increase of about 1%, although this increases towards a 2.5% increment where engines operate in hot and humid environments. Improved efficiency is, of course, critical for the competitive cost of electricity and for the reduction of carbon dioxide emissions.


District Energy St Paul wins IDEA prize, again

The International District Energy Association has presented its System of the Year Award to District Energy St Paul during the Association’s annual conference in Indianapolis, Indiana, US. The award recognizes exemplary system performance and service.

District Energy St. Paul is only the second system to win the award twice, having also won in 1993.

The panel based the selection on achievements including:

  • the system serves twice the square footage of buildings today with the same amount of energy input as when the system began operation in 1983
  • after adjusting for inflation, District Energy St Paul’s customers pay less for heating service today than they did 27 years ago
  • in 2009, the system’s fuel efficiency was 85.9%
  • the system’s service reliability has exceeded 99.997% since starting up in 1983
  • the system’s primary source of renewable thermal energy is from the downtown CHP plant, which used biomass for more than 70% of its fuel input in 2009.



Burns & McDonnell designs utility plant for US hospital

Parkland Health & Hospital System has selected Burns & McDonnell to perform an energy analysis and conceptual and detailed design for the mission-critical central utility plant for its new 17-storey hospital in Dallas, Texas, US. The plant will feature 12,000 tonnes of cooling, 110,000 pounds per hour of steam and 20 MW of emergency power to support the hospital and medical office buildings. The new central utility plant will ensure that Parkland’s electricity and utilities are self-sufficient for at least 36 hours in the event of inclement weather or a blackout.

Energy efficient measures to be evaluated include heat pump chillers, thermal energy storage and chilled water plant optimization. These measures will optimize energy use and provide redundant, reliable and efficient utilities to the new Parkland campus, says Burns & McDonnell. The $1.2 billion new Parkland campus will include an 860-bed adult inpatient hospital, an outpatient clinic building, an office building, a central utility plant and parking.

‘The central utility plant’s energy efficiency will help us obtain LEED (US Green Building Council’s Leadership in Energy and Environmental Design certification) Silver certification for the new health care campus, which optimizes our resources, saving money both for the hospital and taxpayers,’ said Kurt Dierking, Vice President of Facilities Support Services at Parkland.


Landfill gas cogeneration project for US Marine Corps base

The US Marine Corps Logistics Base (MCLB) at Albany, Georgia, and Chevron Energy Solutions are to develop the Department of Navy’s first landfill gas cogeneration project, which will produce 1.9 MW of renewable electricity and steam generating capacity by burning landfill gas collected from a nearby landfill site.

Chevron Energy Solutions has designed the project and will maintain the landfill gas-to-energy facility, pipeline and landfill gas processing equipment. The new facility will house a dual-fuel engine generator, a stack heat recovery steam generator and two dual-fuel boilers. The primary equipment can operate on landfill gas or natural gas, which provides energy security benefits, says Chevron.

Chevron Energy Solutions and MCLB will share in the operation of the generator and steam-producing equipment. Through an energy savings performance contract, Chevron arranged the financing for the project, which is repaid through the energy costs avoided. The company also guarantees system performance for 22 years.


Biogas CHP for Hungarian wastewater scheme

One of Europe’s most ambitious biogas from wastewater projects has been switched on in Budapest by the UK-based CHP technology provider ENER-G. The company’s Hungarian subsidiary ENER-G Energia Technologia has designed and built a €2.6 million renewable energy centre at the Budapest wastewater treatment plant in Csepel ” part of the Living Danube programme, said to be Europe’s largest environmental investment currently under implementation.

ENER-G has installed a 4.5 MWe biogas cogeneration system, together with three 2.5 MW Loos boilers for additional hot water generation using natural gas, or biogas. The company also manages the operations and maintenance services.

Construction of the plant, which was financed by the EU, the Hungarian state and Budapest municipality, took more than two years and cost nearly half a billion Euros.

The energy centre will run at up to 80% capacity until September, when it will be fully commissioned, says ENER-G. It will supply up to 4.5 MWe of renewable electricity to the site, more than 50% of the plant’s total electricity consumption. The maximum 8.5 MW heat generated by the CHP unit is utilized in the digester process.


Fuel cell CHP plants for California university campus

Pacific Gas and Electric Company (PG&E) has ordered two 1.4 MW fuel cell power plants to install as utility-owned fuel cells on the campuses of California State University East Bay and San Francisco State University, according to supplier FuelCell Energy.

The DFC1500 fuel cell power plants will be configured to utilize the by-products of the fuel cell energy conversion process, including waste heat and waste water to meet campus needs. CSU East Bay plans to utilize the waste heat for heating a swimming pool, and the waste water for landscape irrigation. SFSU plans to utilize the waste heat for facility management.

The fuel cell plants are expected to be operational in 2011. In conjunction with the installation of the fuel cell power plants, the state universities are expected to incorporate fuel cell technology into their respective curriculums to teach students and the public about the benefits of fuel cell systems.

The total value of the contracts is approximately $13 million, which will include engineering, procurement and construction services for the installation of the power plants. The order follows the recent approval by the California Public Utilities Commission (CPUC) for PG&E to pursue utility-owned fuel cell installations at two California universities.

For more information, enter 9 at


Turning waste heat into revenue with ORC technology

Calnetix Power Solutions has launched a range of ‘Clean Cycle’ waste heat power generation machines that can turn heat generated by reciprocating engines (such as landfill gas engines), biomass boilers and industrial processes (including incinerators and processing plants) into electricity which can either be used on-site or sold to the grid.

The technology can add an additional revenue stream, with modest variable costs, to all kinds of manufacturers, agricultural waste sites, mills, landfill sites and any other industrial process which generates waste heat at temperatures of around 120à‚ºC or higher, says the company.

Based around Organic Rankine Cycle (ORC) technology, the machines are designed to be commercially viable in the 100″150 kW range. The company has shipped 20 units already, which have racked up a more than 7000 operating hours in total.

To date there have been no commercially-viable ORC systems targeted to harvest heat at the lower temperatures generated by reciprocating engines, biomass boilers and industrial processes, says Calnetix, which has re-engineered the ORC process to optimize efficiency and reliability at lower temperatures.

Companies already using Calnetix’s Clean Cycle generators include the Progeco Saw Mill in Italy. Operators of the mill, which burns wood scraps and sawdust to make steam from which electricity is generated, expect to increase its annual revenues through the use of Calnetix Clean Cycle generators, by an additional €400,000 per year.


Mitsubishi to equip new CHP plant near Beijing, china

Mitsubishi Heavy Industries has received an order for major components of natural gas-fired gas turbine combined cycle power generation systems with heat supply capability, which will be installed in a cogeneration facility to be built by Huaneng Power International, one of the major electricity providers in China.

The cogeneration facility in Gaobeidian, in which the gas turbines and other components are to be installed, is the first of six projects planned for the Beijing area. The facility, with 920 MWe capacity during the summertime, or 830 MWe as well as 660 MWth during the wintertime, will provide electricity and heat to meet the fast-growing demands in the nation’s capital city and surrounding area.

The order was placed through Dongfang Turbine Co, a major power generation equipment manufacturer in China to which Mitsubishi has licensed its gas turbine technology. The company will provide two M701F gas turbines as well as major components of a steam turbine. Delivery of the gas turbines is scheduled in February and March of 2011.


Siemens modernizes I&C systems for Dutch cogen plant

Under contract to the plant operator Vattenfall Europe, Siemens has modernized the entire electrical and instrumentation & control (I&C) equipment at the Merwedekanaal 11 cogeneration plant in the Netherlands. The plant, which was put on line for the first time in 1983/84 and has an installed electrical capacity of 100 MW, feeds power into the interconnected grid and supplies approximately 80 MW of district heat to the city of Utrecht.

As part of the modernization, which was performed at the same time to a major gas turbine inspection and overhaul, the outdated electrical and I&C equipment was replaced by Siemens advanced SPPA-T3000 including the SPPA-R3000 power plant and turbine I&C-equipment, as well as components from the SPPA-E3000 electrical solutions range.

The scope of supply included replacement of the unit I&C and the I&C for the BBC gas and steam turbine generators, conversion of the mechanical control equipment to advanced hydraulic systems for the gas and steam turbines, replacement of the start-up frequency converter and synchronization equipment, fail-safe protection system for the steam generators and gas turbines and the provision of remote control by the load dispatcher in Amsterdam.

For more information, enter 11 at


Biofuel-powered gas turbine for Dutch DH scheme

The Dutch Municipality of Hengelo, gas turbine generator set manufacture OPRA and biomass pyrolysis technology company BTG-BTL have recently signed a cooperation agreement to build a CHP plant to run on biofuel.

The parties have agreed to install an OPRA OP16 gas turbine running on pyrolysis oil produced by BTG-BTL in order to provide heat and electricity to the newly-developed district heating system of Hengelo.


Rolls-Royce to power on-site schemes in Yemen and Spain

Global power systems company Rolls-Royce has announced orders worth over $200 million for power generation equipment from customers in various countries, including two on-site energy supply schemes.

A new oil processing installation at a remote desert location in Yemen will use a combination of Rolls-Royce gas and diesel engines to provide 16 MW of base load electrical power. Kentz Overseas has ordered three Bergen B35:40 12-cylinder gas-fuelled engines, along with a single 12-cylinder Bergen B32:40 diesel engine, in a contract valued at $14 million. The engines will run on associated gas currently being flared.

In addition, NUFRI, one of the largest fruit production and processing companies in Spain, has ordered two Bergen B35:40 16-cylinder gas engines for their fruit juice operation in Mollerussa, Spain. The engines will supply an efficient and reliable source of heat and power for 4500 hours of operation annually.


NY hotel turns to American DG Energy for CHP

American DG Energy has reached an agreement to supply clean energy to the Doral Arrowwood Hotel and Conference Center in Rye Brook, New York, US. Under the terms of the agreement, Doral will soon receive a significant portion of its energy from a 375 kW CHP system, which will be installed at the site, owned and operated by American DG. Doral will receive a discount on the energy produced by the CHP system and reduce its carbon emissions by up to 1800 tonnes per year.

American DG will produce energy in the form of electricity, heat and hot water at Doral Arrowwood and sell it to the resort at a price lower than the local energy utility. The energy will be produced with small-scale CHP equipment, comprising three 100 kW units and one 75 kW unit. Taking advantage of the company’s ‘on site utility’ energy solution, Doral will pay only for the energy they use and will avoid all capital, installation and operating costs. American DG will also handle all service, maintenance and repair of the energy system.


More COSPP Articles

No posts to display