Weyerhaeuser Company

800 kW Waste Heat Recovery System Slated for Delivery in Q3 2011

LAKE FOREST, Ill., April 25, 2011 /PRNewswire/ -- KGRA Energy LP, a premier U.S.-based waste heat recovery developer, announced today that it has signed a contract with Weyerhaeuser Company

, one of the world's largest forest products companies. KGRA's subsidiary Ayden HTP Partners LLC will design and construct the 800kW waste heat recovery system at Weyerhaeuser's Greenville, NC lumber mill. The system, which is scheduled to come online in the summer of 2011, will recover waste heat from Weyerhaeuser's biomass-based thermal drying system to generate 4.5 million kWh of CO2-free electricity per year. KGRA's system will displace the equivalent of more than 9 million pounds of carbon dioxide each year.

'KGRA is pleased to be selected by Weyerhaeuser, a leader in innovation and corporate sustainability, as a partner on this important waste heat recovery project,' said Jason Gold, KGRA Energy Chief Executive Officer. 'We look forward to expanding our relationship with Weyerhaeuser as the organization identifies ways to lower energy costs and reduce its carbon footprint at its forest products facilities across the country.'

'We are pleased to be working with KGRA Energy and its partner TAS Energy on this project,' said John Ryan, Region Energy Manager at Weyerhaeuser. 'The technology the company uses is designed to produce clean energy, while reducing our emissions and lowering the plant's electricity bill.'

KGRA Energy's system uses the organic Rankine cycle to recover waste heat from viable sources, such as combustion engine exhausts, furnaces, boilers, and kilns, converting it into usable CO2-free electricity, which lowers energy costs as well as heat pollution. KGRA's systems are modular and scalable, providing the ability to produce power from smaller and lower-temperature heat sources previously deemed unsuitable for standard cogeneration. KGRA projects are customized for the direct needs and specifications of each customer. At the Weyerhaeuser lumber mill, heat will be recovered from a kiln where cut lumber enters the drying process.

The organic Rankine cycle equipment that will be installed in Weyerhaeuser's Greenville, NC lumber mill will be made in America. Additionally, the project is expected to create 19.7 American jobs throughout the development, construction and installation process.

Weyerhaeuser and Ayden HTP Partners LLC, a joint-venture between KGRA Energy and the ORC equipment supplier, TAS Energy LLC, a subsidiary of Turbine Air Systems, LTD, completed the agreement in March 2011. Installation of the project is expected to begin in June and the plant intends to be operational by the end of July 2011.

About KGRA Energy LPKGRA Energy LP is a premier developer of customized renewable energy power generation projects. The company manages the design, construction and installation of organic Rankine cycle waste heat recovery systems that create CO2-free renewable energy for business and utility clients. KGRA's systems are modular and scalable and produce power from waste heat sources deemed unsuitable for traditional cogeneration. KGRA enables pulp and paper, lumber, refinery, cement and power plant clients to convert waste heat to usable electricity, reduce energy costs, lower carbon footprints and create a sustainable future. Visit http://www.kgraenergy.com/ for more information.

About Weyerhaeuser CompanyWeyerhaeuser Company, one of the world's largest forest products companies, began operations in 1900. We grow and harvest trees, build homes and make a range of forest products essential to everyday lives. We manage our timberland on a sustainable basis in compliance with internationally recognized forestry standards. At the end of 2010, we employed approximately 14,000 employees in 10 countries. We have customers worldwide and generated $6.6 billion in sales in 2010. Our stock trades on the New York Stock exchange under the symbol WY. Additional information about us is available at http://www.weyerhaeuser.com/.

About TAS EnergyTAS Energy Inc. is a technology company providing clean economic power solutions by focusing on the energy efficiency and renewable energy markets. TAS designs and manufactures modular energy conversion and cooling systems for the power generation industry; district, commercial and industrial process cooling; mission critical; and the renewable energy sector. TAS specializes in high efficiency standard product designs optimized for high life cycle return performance. Its product capabilities include geothermal and industrial waste heat power generation solutions, gas fired generation augmentation, chilled water systems, modular data centers and clean heat and power on-site energy systems. More can be learned at http://www.tas.com/.

KGRA Energy LP

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