Modelling and performance analysis for endoreversible Meletis-Georgiou cycle with non-linear relation between specific heat of working fluid and its temperature

2013 ◽  
Vol 86 (1) ◽  
pp. 49-59 ◽  
Author(s):  
C Liu ◽  
L G Chen ◽  
F R Sun
Keyword(s):  
Performance Analysis ◽  
Specific Heat ◽  
Linear Relation ◽  
Working Fluid ◽  
Non Linear ◽  
And Performance

Performance Analysis and Comparison of Air Standard Diesel and Diesel-Atkinson Cycles

2013 ◽  
Vol 9 ◽  
pp. 57-65
Author(s):  
Mojtaba Beigzad Abbassi ◽  
Mohamad Hashemi Gahruei ◽  
Saeed Vahidi ◽  
Hamed Shahmirzae Jeshvaghani
Keyword(s):  
Heat Transfer ◽  
Performance Analysis ◽  
Specific Heat ◽  
Output Power ◽  
Compression Ratio ◽  
Thermal Efficiency ◽  
Working Fluid ◽  
Maximum Output ◽  
Specific Heat Ratio ◽  
Atkinson Cycle

This study is concerned with the performance analysis and comparison of air standard Diesel and Diesel-Atkinson cycles with heat-transfer loss, friction like term loss and variable specific-heat ratio of the working fluid based on finite-time thermodynamics. Also numerical examples are detailed to show the relations between the output power and the compression ratio, between the thermal efficiency and the compression ratio, as well as the optimal relation between the output power and the thermal efficiency of both cycles. Furthermore, the effects of variable specific-heat ratio of the working fluid, heat transfer and the friction-like term loss on the performance of both irreversible cycles are analyzed. Comparison of the performance of cycles shows that the heat efficiency and the output power of an air standard Diesel-Atkinson are higher than the Diesel ones and the points of maximum output power and thermal efficiency of Diesel-Atkinson cycle occur at the lower compression ratio. Reduction of Noxis another advantage of Diesel-Atkinson cycle. The results obtained in this paper provide guidance for the design of Diesel and Diesel-Atkinson engines.

scholarly journals PERFORMANCE ANALYSIS OF WORKING FLUIDS ON ORGANIC RANKIE CYCLE (ORC) MODEL WITH BIOMASS ENERGY AS A HEAT SOURCES

2019 ◽  
Vol 8 (3) ◽  
pp. 175
Author(s):  
Lilis Sucahyo
Keyword(s):  
Performance Analysis ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Biomass Energy ◽  
Working Fluid ◽  
Inlet Temperature ◽  
Heat Sources ◽  
Working Fluids ◽  
Fluid Properties ◽  
And Performance

Organic Rankine Cycle (ORC) is an electricity power technology particularly suitable for medium-low temperature heat sources and/or for small available termal power. This paper presents the simulation and performance analysis of working fluids R-134a, R-414B, R-404A and R-407C on ORC with biomass energy as a heat source. Simulation of the ORC system using Cycle Tempo software. The property of working fluids is obtained by using Reference Fluid Properties (Refprop). The best result performance of ORC was shown by working fluid R-404A with thermal efficiency 7.54 % and electric power output ranges between 0.075 kW. This condition operated on turbine inlet temperature at 60 oC, difference turbine working temperature of 15 oC, condensing temperature 25 oC and water boiler mass flow rate 3 lpm.

scholarly journals Modelling and Performance Analysis of a DSTATCOM using ISCT Control Technique

2021 ◽  
Vol 9 (8) ◽  
pp. 1079-1085
Keyword(s):  
Performance Analysis ◽  
Power Quality ◽  
Reactive Power ◽  
Digital Simulation ◽  
Control Technique ◽  
Matlab Simulink ◽  
Non Linear ◽  
Quality Issues ◽  
And Performance ◽  
Bus Voltage

This paper chiefly deals with the performance of DSTATCOM as a load compensator. For enhancing the power quality and so as to mitigate harmonics it is employed on the load side. The reactive power is absorbed or generated by DSTATCOM by regulating the bus voltage. The most reason for occurring of the power quality issues is because of the non-liner loads that were employed by the consumers. DSTATCOM works as inductive or capacitive modes basing on the system voltage. The analysis is performed on the issues in the distribution side by employing the DSTATCOM compensation in this paper. In this paper,we had adopted Instantaneous Symmetrical Compound Theory (ISCT) controller to mitigate harmonics on the source side. The harmonics are due to the increase in the usage of non-linear loads by the consumers. The DSTATCOM regulates the bus voltage by absorbing or generating reactive power. The results are extracted using extensive digital simulation performed in MATLAB/SIMULINK environment.

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