Malmo city of the future

Malmo Bo01

The development on the waterfront of this southern city in Sweden was given its initial impetus by exhibition Bo01, masterminded by Professor Klas Tham and aimed at promoting sustainable urban development. The significance of this project is that it seeks to reconcile the goals of sustainable design with the demands of the market. Malmo is set to experience a renaissance in its fortunes with the completion of the Oresund Bridge linking it to Denmark. This project represents an emphatic...

Types of smallscale wind turbine

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Most small systems have a direct-drive permanent-magnet generator which limits mechanical transmission losses. Systems under 2 kW usually have a 24-48 V capacity aimed at battery charging or a DC circuit rather than having grid compatibility. Up to the present, horizontal-axis machines are much more in evidence than the vertical-axis type, even at this scale. These machines have efficient braking systems for when wind speed is excessive. Some even tip backwards in high winds, adopting the...

Stirling combined heat and power

Stirling Engine For Home Use

The alternative system that is already on the market is a micro-CHP (combined heat and power) unit based on the Stirling engine. The UK government is increasingly promoting micro-CHP as part of its strategy to reduce CO2 emissions, especially in the domestic sector. It is interesting how two nineteenth century technologies, the fuel cell and the Stirling engine, are only now coming into their own. Invented by Robert Stirling in 1816, the eponymous machine is an 'external combustion engine'...

Free piston Stirling engines FPSE

Free Piston Stirling Cooler

The second main category of Stirling engine is a version in which the piston floats freely within a hermetically sealed cylinder thus without an external linkage to drive a generator. This elegant development of the Stirling principle is even more silent than the previous examples and is ideal for domestic use. Sunpower Inc., a US company, plans to introduce a system to the UK in 2007 which is based on a Stirling engine which incorporates an alternator within the cylinder which produces 1 kW of...

STM 4Piston Double Acting Stirling Cycle Engine

Www Stmpower Com Stirling

Figure 9.6 Axial configuration of cylinders (courtesy of STM Power) Beta Stirling Engine Figure 9.6 Axial configuration of cylinders (courtesy of STM Power) Beta Stirling Engine This has a single power piston in the same cylinder and on the same shaft as a displacer piston. The latter is a loose fit piston which serves to move the working gas from the hot zone to the cold heat exchanger. As the working gas is pushed to the hot zone of the cylinder it expands and pushes down the power piston. At...