scholarly journals The saturated and supercritical Stirling cycle thermodynamic heat engine cycle

AIP Advances ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 085309
Author(s):  
Matthew David Marko
Keyword(s):  
Heat Engine ◽  
Stirling Cycle ◽  
Heat Engine Cycle ◽  
Engine Cycle

Encoding a Model-Based Display with Dynamic Data

2000 ◽  
Vol 44 (22) ◽  
pp. 579-582 ◽  
Author(s):  
Leo Beltracchi
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Analytical Data ◽  
Heat Engine ◽  
Rankine Cycle ◽  
Direct Perception ◽  
Dynamic Data ◽  
Model Based ◽  
Heat Engine Cycle ◽  
Engine Cycle

A model-based display of the heat engine cycle for a nuclear power plant is defined and illustrated in terms of the thermodynamic first principles used to design the plant. The model-based display is a modified Rankine Cycle, the basic heat engine cycle for power plants. The display is made from measured process variables and the properties of water and presented on a CRT in iconic form, thereby providing a direct perception of the process. This structure of display design is an example of Rasmussen's means-ends hierarchy; starting with the abstract and ending with the specific display. Encoding the display with dynamic data aids operators in monitoring and interpreting the plant during transients and disturbances. Analytical data on the TMI-2 accident is used to illustrate the dynamic coding of the model-based display. The concepts discussed and illustrated are applicable to fossil and nuclear power plants and to other process industries.

Mass Engine Cycle

2014 ◽  
Author(s):  
Mostafa H. Sharqawy
Keyword(s):  
Mass Concentration ◽  
Heat Engine ◽  
Thermodynamic Cycle ◽  
High Mass ◽  
Permeable Membrane ◽  
Thermal Reservoir ◽  
Thermodynamic Conditions ◽  
Heat Engine Cycle ◽  
Positive Work ◽  
Engine Cycle

A new thermodynamic cycle is proposed named mass engine cycle. In the proposed cycle, mass is transferred from a high mass concentration reservoir to the cycle, mass is rejected to a low mass concentration reservoir, and a net positive work is generated. This is similar to heat engine cycles where heat is transferred from a high temperature thermal reservoir (heat source) to the cycle; heat is rejected to a low temperature thermal reservoir (heat sink), and a net positive work is generated. The heat engine cycle uses heat exchangers to transfer heat between the cycle and the thermal reservoirs, while the mass engine cycle uses membrane mass exchangers which transfer mass between the cycle and the mass reservoir. These membrane mass exchangers transfer water through a semi-permeable membrane and reject other substances. The driving force for the mass transfer is the hydrostatic and osmotic pressure differences. Similar to Carnot limit of the thermal efficiency of the heat engine cycle, a theoretical limit is obtained for the proposed mass engine cycle under reversible thermodynamic conditions.

Construction of a quantum Carnot heat engine cycle

2020 ◽  
Vol 19 (9) ◽  
Author(s):  
Selçuk Çakmak ◽  
Mustafa Çandır ◽  
Ferdi Altintas
Keyword(s):  
Heat Engine ◽  
Heat Engine Cycle ◽  
Engine Cycle

Thermodynamic Optimization Characteristics of a Type I Absorption Heat Pump within Finite Time

2012 ◽  
Vol 204-208 ◽  
pp. 4250-4253
Author(s):  
Xi Ling Zhao ◽  
Yan Li ◽  
Lin Fu
Keyword(s):  
Heat Pump ◽  
Finite Time ◽  
System Performance ◽  
Heat Engine ◽  
Type I ◽  
Absorption Heat Pump ◽  
Friction Heat ◽  
Internal Irreversibility ◽  
Heat Engine Cycle ◽  
Engine Cycle

The absorption heat pump was studied with finite time thermodynamics. A four reservoirs model of absorption heat pump which is treated as an irreversible Carnot heat pump driven by an irreversible Carnot heat engine was established considering the heat resistance and the irreversibility of the internal cycle. A generalized optimization relationship between the main parameters and the corresponding conditions were derived. It is show that, two internal irreversibility parameters, the heat engine cycle and the heat pump cycle has different effects on system performance, and the reduction of the friction, heat loss, and internal dissipations of the equivalent heat pump cycle are more important than its reduction of heat engine cycle.

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