Format:
Online-Ressource (1 online resource (192 p.))
,
digital, PDF file(s).
Edition:
Online-Ausg.
ISBN:
9780511546105
Content:
This 2007 book presents a developed general conceptual and basic quantitative analysis as well as the theory of mechanical efficiency of heat engines that a level of ideality and generality compatible with the treatment given to thermal efficiency in classical thermodynamics. This yields broad bearing results concerning the overall cyclic conversion of heat into usable mechanical energy. The work reveals intrinsic limits on the overall performance of reciprocating heat engines. The theory describes the general effects of parameters such as compression ratio and external or buffer pressure on engine output. It also provides rational explanations of certain operational characteristics such as how engines generally behave when supercharged or pressurized. The results also identify optimum geometric configurations for engines operating in various regimes from isothermal to adiabatic and are extended to cover multi-workspace engines and heat pumps. Limited heat transfer due to finite-time effects have also been incorporated into the work
Content:
Energy Transfers in Cyclic Heat Engines -- Heat Engine Diagrams -- The Basic Cyclic Heat Engine -- Buffer Pressure -- Shaft Work -- Buffer Pressure and Energy Transfers -- Mechanism Effectiveness and Mechanical Efficiency -- Mechanism Effectiveness -- Mechanical Efficiency -- Forced Work -- General Efficiency Limits -- The Fundamental Efficiency Theorem -- Stirling Comparison Theorem -- Constant Mechanism Effectiveness -- Optimum Buffer Pressure -- Optimally Buffered Stirling Engines -- The Mechanical Efficiency Limit -- The Brake Thermal Efficiency Limit -- Average Cycle and Optimum Buffer Pressure -- Compression Ratio and Shaft Work -- Limits on Compression Ratio -- Shaft Work Limits -- Temperature Effects -- Proof of the Maximum Shaft Work Theorem -- Pressurization Effects -- System Charging Monomorphic Engines -- Engines Charged Above Buffer Pressure -- Workspace Charging Theorem -- Charge Effects in Ideal Stirling Engines -- Workspace Charging Ideal Stirling Engines -- Efficacious Cycles -- Non-Efficacious Cycles -- Practical Implications -- Crossley-Stirling Engines -- Crossley Cycles -- Crossley Cycle Analysis -- Forced Work of the Crossley Cycle -- The Swept Volume Ratio Problem -- Conclusions -- Generalized Engine Cycles and Variable -- Buffer Pressure -- Parametric Representation -- Average Cycle Pressures -- Variable Buffer Pressure -- Buffer Pressure and Energy Transfers -- Mechanical Efficiency -- Pressurization Effects -- Multi-workspace Engines and Heat Pumps -- Multi-cylinder Engines -- Split-workspace Engines -- Engines with Double-acting Pistons -- Double-acting Split-workspace Engines -- Heat Pumps -- Optimum Stirling Engine Geometry -- The Gamma Engine -- The Schmidt Analysis -- The Schmidt Model for Gamma Engines -- Indicated Work -- Shaft Work -- Parameter Effects on Brake Output -- Optimum Swept Volume Ratio and Phase Angle -- Swept Volume Ratios -- Internal Temperatures -- Indicated Work Maxima -- Phase Angle -- Dead Space Effects -- Alternate Engine Configurations -- Conclusions -- Heat Transfer Effects -- Heat Exchange -- Heat Transfer Assumptions -- Maximum Indicated Power -- Maximum Brake Power -- Brake Thermal Efficiency at Maximum Power -- Heat Losses in Stirling Engines -- Maximum Indicated Power with Heat Leakage -- Operating Frequency and Temperature Ratio in Stirling -- Engines -- Maximum Brake Power of Stirling Engines with Heat Loss -- Universal Power Maxima -- Power Relative to Efficiency -- A General Theory of Machines, Effectiveness, and Efficiency -- Kinematic Machines -- State Parameter -- Actuator Forces -- Force Relation -- Internal Energy -- Force Processes -- Frictional Dissipation -- Graphical Representation -- Reversed Operation -- Mechanism Effectiveness -- Content of the Effectiveness Function -- Actuator Work -- Constant Internal Energy -- An Ultra Low Temperature Differential Stirling Engine -- Background -- Compression Ratio Limits -- Mean Volume Specific Work -- Engine Performance -- Derivation of Schmidt Gamma Equations -- Volume and Pressure Functions -- Indicated Work -- Forced Work
Note:
Title from publisher's bibliographic system (viewed on 05 Oct 2015)
Additional Edition:
ISBN 9780521868808
Additional Edition:
ISBN 9780521169288
Additional Edition:
Erscheint auch als Druck-Ausgabe Senft, James R., 1942 - Mechanical efficiency of heat engines Cambridge [u.a.] : Cambridge University Press, 2007 ISBN 0521868807
Additional Edition:
ISBN 9780521868808
Additional Edition:
Erscheint auch als Druck-Ausgabe ISBN 9780521868808
Language:
English
Subjects:
Engineering
Keywords:
Wärmekraftmaschine
DOI:
10.1017/CBO9780511546105
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