Build Eco
Architecture & Construction - Commercial
New age energy for commercial buildings
The pace of modern technology, the requirements of emerging nations and the greater aspirations of individuals means that the demand for energy has never been as intense as it is today.
Clarke Energy is a powerful force in the international market of alternative power generation.
Currently more than 3,880 Jenbacher cogeneration plants with a total electrical output of over 4,280 MW have been delivered worldwide.
Across the world, there is a new emphasis on projects that combine climate protection and economical primary power generation. GE's Jenbacher gas engine division is one of the world's leading manufacturers of gas-fueled reciprocating engines, packaged generator sets and cogeneration units for power generation. It is one of the only companies in the world focusing exclusively on gas engine technology.
With more than 25 years experience in the combustion of landfill gas and currently more than 1,200 MW delivered throughout the world, the Jenbacher product team offers an unparalleled breadth of expertise, references and solution variants.
Cogeneration of heat and power (CHP systems)
Jenbacher Cogeneration systems generate both heat and power by utilizing the waste heat incurred during engine operation to generate overall plant efficiencies of more than 90%. 
This efficient form of energy conversion achieves primary energy savings of roughly 40% by using a gas engine cogeneration system instead of separate power and heat generation equipment. Transportation and distribution losses are also reduced or eliminated as the decentralized energy supply is set up where it is needed.
The basic structure of a Jenbacher CHP system consists of an engine/generator unit and heat exchangers for the utilization of waste heat. The incorporation of a wide range of heat sources - from engine cooling water, oil and air/fuel gas mixture to exhaust gas - is configured to maximize the benefit to each individual customer.
Cogeneration systems can be supplemented with a boiler system for bridging peak heat demand periods. An additional increase in the operating time and efficiency of the system is made possible by the connection of a heat storage medium. Power plant electrical switch and control systems distribute the electricity and manage the engine, while hydraulic equipment ensure heat distribution.
The generated power is either utilized on site or fed into the public power grid. The thermal energy can be used for both generating heating water and steam production as well as for various types of process heat. Gas engine cogeneration systems are also used for CO2 fertilization in greenhouses and trigeneration systems (combined heat, cooling & power generation).
Trigeneration of heat, cooling & power
Combining a cogeneration plant with an absorption refrigeration system allows utilization of seasonal excess heat for cooling. The hot water from the cooling circuit of the cogeneration plant serves as drive energy for the absorption chiller. The hot exhaust gas from the gas engine can also be used as an energy source for steam generation, which can then be utilized as an energy source for a highly efficient, double-effect steam chiller. Up to 80% of the thermal output of the cogeneration plant is thereby converted to chilled water. In this way, the year-round capacity utilization and the overall efficiency of the cogeneration plant can be increased significantly with an additional benefit being that utilizing the water as refrigerant, the otherwise damaging ozone substances are eliminated.
With a trigeneration system the heat can be utilized to cover heat requirements during the cold seasons, produced electricity can be fed into the public grid or used to cover electricity requirements, and with no moving parts there is little maintenance required.
The high efficiency of the Jenbacher engines becomes particularly beneficial when used in a CHP (combined heat and power) or trigeneration application, such as district heating schemes, hospitals, universities or industrial plants. With governmental pressure mounting on companies and organisations to reduce their carbon footprint the efficiencies and energy returns from CHP and Trigeneration installations have proven to be the energy resource of choice.
For further information please visit Clarke Energy http://www.clarke-energy.com
16 September 2008
