Bubble-Point Measurements of Eight Binary Mixtures for Organic Rankine Cycle Applications

2013 ◽  
Vol 58 (6) ◽  
pp. 1853-1860 ◽  
Author(s):  
Stephanie L. Outcalt ◽  
Eric W. Lemmon
Keyword(s):  
Binary Mixtures ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Bubble Point

Evaluation of Performance for Organic Rankine Cycle Driven by Ethanol + Butanol Binary Mixtures

2017 ◽  
Vol 2017.70 (0) ◽  
pp. 101
Author(s):  
Masashi IWASAKI ◽  
Shogo FUKUSHIMA ◽  
Hayate TOMODA ◽  
Tomohiko YAMAGUCHI
Keyword(s):  
Binary Mixtures ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Evaluation Of Performance

scholarly journals Pure and Hydrocarbon Binary Mixtures as Possible Alternatives Working Fluids to the Usual Organic Rankine Cycles Biomass Conversion Systems

Energies ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 4140 ◽  
Author(s):  
Costante M. Invernizzi ◽  
Abubakr Ayub ◽  
Gioele Di Marcoberardino ◽  
Paolo Iora
Keyword(s):  
Binary Mixtures ◽  
Biomass Conversion ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Thermodynamic Efficiency ◽  
Operating Pressure ◽  
Lower Efficiency ◽  
Working Fluids ◽  
Noticeable Increase

This study investigates the use of pure and hydrocarbons binary mixtures as potential alternatives working fluids in a usual biomass powered organic Rankine cycle (ORC). A typical biomass combined heat and power plant installed in Cremona (Italy) is considered as the benchmark. Eight pure hydrocarbons (linear and cyclic) and four binary mixtures of linear hydrocarbons were selected. The critical points of the binary mixtures at different composition were calculated using an in-house code developed in MATLAB© (R2018b) environment. Based on the critical point of a working fluid, supercritical and subcritical cycle configurations of ORC were analysed. A detailed thermodynamic comparison with benchmark cycle was carried out in view of cycle efficiency, maximum operating pressure, size of the turbine and heat exchangers. The supercritical cycles showed 0.02 to 0.03 points lower efficiency, whereas, subcritical cycles showed comparable efficiencies than that of the benchmark cycle. The cycles operating with hydrocarbons (pure and mixtures) exhibited considerably lower volume flow ratios in turbine which indicates lower turbine size. Also, size parameter of regenerator is comparatively lower due to the lower molecular complexity of the hydrocarbons. A noticeable increase in turbine power output was observed with change in composition of the iso-octane/n-octane binary mixture at the same thermodynamic efficiency.

Low grade waste heat recovery with subcritical and supercritical Organic Rankine Cycle based on natural refrigerants and their binary mixtures

Energy ◽  
2015 ◽  
Vol 88 ◽  
pp. 80-92 ◽  
Author(s):  
Konstantinos Braimakis ◽  
Markus Preißinger ◽  
Dieter Brüggemann ◽  
Sotirios Karellas ◽  
Kyriakos Panopoulos
Keyword(s):  
Binary Mixtures ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Low Grade

Model, simulation and experiments for a Buoyancy Organic Rankine Cycle

2020 ◽  
Vol 92 (1) ◽  
pp. 10906
Author(s):  
Jeroen Schoenmaker ◽  
Pâmella Gonçalves Martins ◽  
Guilherme Corsi Miranda da Silva ◽  
Julio Carlos Teixeira
Keyword(s):  
Model Simulation ◽  
Organic Rankine Cycle ◽  
Thermodynamic Cycle ◽  
Rankine Cycle ◽  
Test Body ◽  
Working Fluid ◽  
Proof Of Concept ◽  
Energy Scenario ◽  
New Type ◽  
Fluid Reservoir

Organic Rankine Cycle (ORC) systems are increasingly gaining relevance in the renewable and sustainable energy scenario. Recently our research group published a manuscript identifying a new type of thermodynamic cycle entitled Buoyancy Organic Rankine Cycle (BORC) [J. Schoenmaker, J.F.Q. Rey, K.R. Pirota, Renew. Energy 36, 999 (2011)]. In this work we present two main contributions. First, we propose a refined thermodynamic model for BORC systems accounting for the specific heat of the working fluid. Considering the refined model, the efficiencies for Pentane and Dichloromethane at temperatures up to 100 °C were estimated to be 17.2%. Second, we show a proof of concept BORC system using a 3 m tall, 0.062 m diameter polycarbonate tube as a column-fluid reservoir. We used water as a column fluid. The thermal stability and uniformity throughout the tube has been carefully simulated and verified experimentally. After the thermal parameters of the water column have been fully characterized, we developed a test body to allow an adequate assessment of the BORC-system's efficiency. We obtained 0.84% efficiency for 43.8 °C working temperature. This corresponds to 35% of the Carnot efficiency calculated for the same temperature difference. Limitations of the model and the apparatus are put into perspective, pointing directions for further developments of BORC systems.

EXPERIMENTAL STUDY ON PUMP APPLIED IN ORGANIC RANKINE CYCLE SYSTEM

2017 ◽  
Author(s):  
Weicong Xu ◽  
Li Zhao ◽  
Shuai Deng ◽  
Jianyuan Zhang ◽  
Wen Su
Keyword(s):  
Experimental Study ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Cycle System
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