Performance investigation and evaluation of an engine operating on a modified dual cycle

2021 ◽  
Author(s):  
Guven Gonca ◽  
Bahri Sahin
Keyword(s):  
Dual Cycle

Finite-time thermodynamic performance of a Dual cycle

1999 ◽  
Vol 23 (9) ◽  
pp. 765-772 ◽  
Author(s):  
Junxing Lin ◽  
Lingen Chen ◽  
Chih Wu ◽  
Fengrui Sun
Keyword(s):  
Finite Time ◽  
Thermodynamic Performance ◽  
Dual Cycle

Dual cycle amplification and dual signal enhancement assisted sensitive SERS assay of MicroRNA

2019 ◽  
Vol 564-565 ◽  
pp. 16-20
Author(s):  
Yingdi Wu ◽  
Ying Li ◽  
Huixia Han ◽  
Caisheng Zhao ◽  
Xiaoru Zhang
Keyword(s):  
Signal Enhancement ◽  
Dual Cycle

Thermodynamic Performance Optimization of Reciprocating Internal Combustion (IC) Engines

2008 ◽  
Author(s):  
George A. Adebiyi ◽  
Kalyan K. Srinivasan ◽  
Charles M. Gibson
Keyword(s):  
Performance Optimization ◽  
Combustion Process ◽  
Design Parameters ◽  
Second Law ◽  
Ic Engine ◽  
Thermodynamic Performance ◽  
Second Law Analysis ◽  
Compression And Expansion ◽  
Dual Cycle ◽  
Ic Engines

Reciprocating IC engines are traditionally modeled as operating on air standard cycles that approximate indicator diagrams obtained in experiments on real engines. These indicator diagrams can best be approximated by the dual cycle for both gasoline and diesel engines. Analysis of air standard cycles unfortunately fails to capture second law effects such as exergy destruction due to the irreversibility of combustion. Indeed, a complete thermodynamic study of any process requires application of both the first and second laws of thermodynamics. This article gives a combined first and second law analysis of reciprocating IC engines in general with optimization of performance as primary goal. A practical dual-like cycle is assumed for the operation of a typical reciprocating IC engine and process efficiencies are assigned to allow for irreversibilities in the compression and expansion processes. The combustion process is modeled instead of being replaced simply by a heat input process to air as is common in air standard cycle analysis. The study shows that performance of the engine can indeed be optimized on the basis of geometrical design parameters such as the compression ratio as well as the air-fuel ratio used for the combustion.

scholarly journals How Many Molecules Can Fit in a Zeolite Pore? Implications for the Hydrocarbon Pool Mechanism of the Methanol-to-Hydrocarbons Process

Catalysts ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1204
Author(s):  
Stewart Parker ◽  
Aleena Kombanal
Keyword(s):  
Steady State ◽  
Light Alkenes ◽  
Hydrocarbon Pool ◽  
Methanol To Hydrocarbons ◽  
Commodity Chemicals ◽  
Minimum Number ◽  
Dual Cycle ◽  
Materials Used ◽  
Hydrocarbon Pool Mechanism ◽  
Available Volume

The methanol-to-hydrocarbons (MTH) process is a very advantageous way to upgrade methanol to more valuable commodity chemicals such as light alkenes and gasoline. There is general agreement that, at steady state, the process operates via a dual cycle “hydrocarbon pool” mechanism. This mechanism defines a minimum number of reactants, intermediates, and products that must be present for the reaction to occur. In this paper, we calculate (by three independent methods) the volume required for a range of compounds that must be present in a working catalyst. These are compared to the available volume in a range of zeolites that have been used, or tested, for MTH. We show that this straightforward comparison provides a means to rationalize the product slate and the deactivation pathways in zeotype materials used for the MTH reaction.

Heat transfer effects on the performance of an air-standard irreversible dual cycle

2013 ◽  
Vol 63 (1) ◽  
pp. 102 ◽  
Author(s):  
Yasin Ust ◽  
Bahri Sahin ◽  
Hasan Kayhan Kayadelen ◽  
Guven Gonca
Keyword(s):  
Heat Transfer ◽  
Transfer Effects ◽  
Dual Cycle ◽  
Heat Transfer Effects

Heat Transfer Coefficient of a Film Condenser in a Dual Cycle Refrigeration System

1993 ◽  
pp. 543-551
Author(s):  
Sauro Pierucci ◽  
Renato Del Rosso ◽  
Angelo Sogaro ◽  
Claudio Ferrari ◽  
Stefano Gaudenzi
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Refrigeration System ◽  
Dual Cycle
Sign in / Sign up

Export Citation Format

Share Document