NDLI: Stirling Engines With a Chemically Reactive Working Fluid

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Metwally, M. M. Walker, G.
Copyright Year	1977
Abstract	Stirling engines operate on closed regenerative thermodynamic cycles with compression and expansion of the working fluids at different temperature levels. They may be used as prime movers, refrigerating machines, heat pumps, or pressure generators. Conventional machines use a gaseous working fluid, but substantial improvement in specific output may be gained with a partially reactive, condensing working fluid. The working fluid then consists of an inert gaseous carrier with a chemically reactive, condensing working fluid such as nitrogen tetroxide (N2 O4 ). This may be liquid in the cold compression space and then evaporates and dissociates in the regenerative process to be in the elemental gaseous phase in the hot expansion space. The change of state of one component reduces the required compression work and has the effect of increasing the engine volume compression ratio with consequent benefit to the specific output. The results obtained using idealized theory show that an improvement may be gained in net cycle work of twice the output with a simple gaseous working fluid with no penalties in size, weight, or cost of the engine. The degree of improvement depends on the design and operating conditions of the engine. The effects of variation of some of these parameters are explored.
Starting Page	284
Ending Page	287
Page Count	4
File Format	PDF
ISSN	07424795
e-ISSN	15288919
Journal	Journal of Engineering for Gas Turbines and Power
Volume Number	99
Issue Number	2
DOI	10.1115/1.3446287
Language	English
Publisher	The American Society of Mechanical Engineers
Publisher Date	1977-04-01
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Compression Cycles Design Engines Fluids Generators Heat pumps Machinery Nitrogen Pressure Stirling engines Temperature Thermodynamic cycles Weight (Mass)
Content Type	Text
Resource Type	Article
Subject	Fuel Technology Energy Engineering and Power Technology Nuclear Energy and Engineering Mechanical Engineering Aerospace Engineering

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