Design of an External Combustion Engine and its Application in a Free Piston Compressor

2007 ◽  
Vol 3 ◽  
Author(s):  
Jonathan Hogan Webb
Keyword(s):  
Combustion Engine ◽  
Piston Compressor ◽  
Dead Volume ◽  
Transfer Energy ◽  
Free Piston ◽  
Combustion Gases ◽  
Intermediate Chamber ◽  
Fuel Mixtures ◽  
External Combustion ◽  
External Combustion Engine

The design of a free piston compressor and an analysis on integrating an external combustion engine into the compressor design are presented in this article. A free piston compressor is a device which converts chemical energy to work on a volume of air through the kinetic energy of an inertia driven piston, which is not rigidly attached to a ground. An external combustion engine serves as in intermediate chamber which transfers combustion gases to a device to perform some work. The following discusses the design and experiments on an external combustion engine, with a focus on eliminating an injection holding force on a free piston compressor’s elastomeric membranes. The efficiency of the external combustion engine to transfer energy without significant losses due to heat, dead volume, air/fuel mixtures, and actuated valve speed are also presented.

A Compact External Combustion Engine With High Part-Load Efficiency

2010 ◽  
Author(s):  
Robert Bourque
Keyword(s):  
Combustion Engine ◽  
Front Wheel ◽  
Good Efficiency ◽  
Complete Combustion ◽  
Part Load ◽  
Gasoline Engines ◽  
Full Power ◽  
And Performance ◽  
External Combustion ◽  
External Combustion Engine

An external combustion engine design using steam is described which has good efficiency at full power and even better efficiency at the low power settings common for passenger vehicles. The engine is compact with low weight per unit power. All of its components fit in the engine compartment of a front-wheel drive vehicle despite the space occupied by the transaxle. It readily fits in a rear-drive vehicle. Calculated net efficiencies, after accounting for all losses, range, depending on engine size, from 28–32% at full power increasing to 33–36% at normal road power settings. A two-stage burner, 100% excess air, and combustion temperature below 1500°C assure complete combustion of the fuel and negligible NOx. The engine can burn a variety of fuels and fuel mixes, which should encourage the development of new fuels. Extensive software has been written that calculates full power and part-load energy balances, structural analysis and heat transfer, and performance in specified vehicles including using SAE driving cycles. Engines have been sized from 30 to 3200 hp. In general, fuel consumption should be at least 1.5 times lower than gasoline engines and about the same as diesels operating at low to moderate load settings. Due to this analysis, a prototype, when built, should perform as expected.

Optimization of a model external combustion engine

1982 ◽  
Vol 53 (1) ◽  
pp. 29-33 ◽  
Author(s):  
Yehuda B. Band ◽  
Oded Kafri ◽  
Peter Salamon
Keyword(s):  
Combustion Engine ◽  
External Combustion ◽  
External Combustion Engine

scholarly journals Design and anylysis of gamma type Stirling engine

2020 ◽  
Vol 21 (5) ◽  
pp. 511
Author(s):  
Davood Jalali Vahid ◽  
Hojjat Danandeh Oskouei
Keyword(s):  
Combustion Engine ◽  
Stirling Engine ◽  
Electric Heater ◽  
Design And Manufacturing ◽  
Design And Manufacture ◽  
External Combustion ◽  
External Combustion Engine

This article discusses how to design and manufacture a gamma type Stirling engine. The Stirling engine is an external combustion engine that does not produce any pollution. In this study, we studied the design and manufacturing of industrial Stirling engine. After designing and manufacturing all the parts, the designed Stirling engine has been launched by a 550-watt electric heater and has been tested in two uninsured and insulated modes. In non-insulated mode, the motor had a power of 68.69 watts with a yield of 12.66% and, when the motor is insulated, it had a power of 86.48 watts with a yield of 15.72%.

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