Performances Optimization and Comparison of Two Organic Rankine Cycles for Cogeneration in the Cement Plant

2019 ◽  
Vol 142 (2) ◽  
Author(s):  
Zineb Fergani ◽  
Tatiana Morosuk ◽  
Djamel Touil
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Cement Plant ◽  
Additional Heat ◽  
Parametric Studies ◽  
Organic Rankine Cycles ◽  
System Configurations

Abstract In this paper, the potential application of an organic Rankine cycle (ORC) for cogeneration in a cement plant is presented. Two ORC system configurations are considered. The first configuration is based on the waste heat recovery from the exit gases of clinker burning system. An additional heat source which is the solar energy was used for the second configuration. Parametric studies are performed for the systems with three different working fluids. Both systems are optimized from the viewpoints of thermodynamic, exergoeconomic, and exergoenvironmental analyses.

Thermodynamic Analysis of Waste Heat Recovery Systems in Large Waste Heat Generating Industries

2021 ◽  
Author(s):  
Shantanu Thada ◽  
Yash T. Rajan ◽  
A. M. Pradeep ◽  
Arunkumar Sridharan
Keyword(s):  
Heat Source ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Manufacturing Industry ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Primary Objective ◽  
Cement Plant ◽  
Comparative Performance

Abstract The accelerating growth of electricity demand necessitates looking for potential waste heat recovery solutions in production industries. Significant potential for efficient waste heat recovery is observed in the cement manufacturing industry. Based on the waste heat source temperatures in a cement plant, two potential candidates, the supercritical CO2 Brayton (S-CO2) cycle or the Organic Rankine cycle (ORC), promises low capital cost and enhanced thermodynamic performance. The current study focuses on modelling and optimization of the S-CO2 and ORC cycles for a 1 MTPA cement plant, with the raw-clinker preheater as the waste-heat source. The primary objective is to maximize the net-power output using genetic algorithms. A comparative performance analysis of the two ORCs with working fluids: R134a and Propane, the simply recuperated S-CO2 cycle (RC) and recompressed-recuperated S-CO2 cycle (RRC) configurations is presented with varying number of preheaters. For all cases, ORC-R134a yields more power than the ORC-Propane, RC, and RRC configurations. In terms of the waste heat recovered, ORC-Propane marginally outperforms ORC-R134a. The ORC configurations recover 32%–38% of the available heat, while the S-CO2 configurations recover, at maximum, 25%–30% of the available heat.

scholarly journals Component-Oriented Modeling of a Micro-Scale Organic Rankine Cycle System for Waste Heat Recovery Applications

2021 ◽  
Vol 11 (5) ◽  
pp. 1984
Author(s):  
Ramin Moradi ◽  
Emanuele Habib ◽  
Enrico Bocci ◽  
Luca Cioccolanti
Keyword(s):  
Electric Power ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Operating Conditions ◽  
Working Fluid ◽  
Pump Efficiency ◽  
Micro Scale

Organic Rankine cycle (ORC) systems are some of the most suitable technologies to produce electricity from low-temperature waste heat. In this study, a non-regenerative, micro-scale ORC system was tested in off-design conditions using R134a as the working fluid. The experimental data were then used to tune the semi-empirical models of the main components of the system. Eventually, the models were used in a component-oriented system solver to map the system electric performance at varying operating conditions. The analysis highlighted the non-negligible impact of the plunger pump on the system performance Indeed, the experimental results showed that the low pump efficiency in the investigated operating range can lead to negative net electric power in some working conditions. For most data points, the expander and the pump isentropic efficiencies are found in the approximate ranges of 35% to 55% and 17% to 34%, respectively. Furthermore, the maximum net electric power was about 200 W with a net electric efficiency of about 1.2%, thus also stressing the importance of a proper selection of the pump for waste heat recovery applications.

scholarly journals Biogas Engine Waste Heat Recovery Using Organic Rankine Cycle

Energies ◽  
2017 ◽  
Vol 10 (3) ◽  
pp. 327 ◽  
Author(s):  
Alberto Benato ◽  
Alarico Macor
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle
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