Performance assessment of steam Rankine cycle and sCO 2 Brayton cycle for waste heat recovery in a cement plant: A comparative study for supercritical fluids

2020 ◽  
Vol 44 (15) ◽  
pp. 12329-12343 ◽  
Author(s):  
Onder Kizilkan
Keyword(s):  
Comparative Study ◽  
Performance Assessment ◽  
Supercritical Fluids ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Rankine Cycle ◽  
Cement Plant ◽  
Brayton Cycle

Brayton Cycle Supercritical CO2 Power Block for Industrial Waste Heat Recovery

2019 ◽  
Author(s):  
Sharath Sathish ◽  
Pramod Kumar ◽  
Logesh Nagarathinam ◽  
Lokesh Swami ◽  
Adi Narayana Namburi ◽  
...  
Keyword(s):  
Industrial Waste ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Rankine Cycle ◽  
Coke Oven ◽  
Brayton Cycle ◽  
Steam Power ◽  
Power Block ◽  
Industrial Waste Heat

Abstract The Brayton cycle based supercritical CO2 (sCO2) power plant is an emerging technology with benefits such as; higher cycle efficiency, smaller component sizes, reduced plant footprint, lower water usage, etc. There exists a high potential for its applicability in waste heat recovery cycles, either as bottoming cycles for gas turbines in a combined cycle or for industrial waste heat recovery in process industries such as iron & steel, cement, paper, glass, textile, fertilizer and food manufacturing. Conventionally steam Rankine cycle is employed for the gas turbine and industrial waste heat recovery applications. The waste heat recovery from a coke oven plant in an iron & steel industry is considered in this paper due to the high temperature of the waste heat and the technological expertise that exists in the author’s company, which has supplied over 50 steam turbines/ power blocks across India for various steel plants. An effective comparison between steam Rankine cycle and sCO2 Brayton cycle is attempted with the vast experience of steam power block technology and extending the high pressure-high temperature steam turbine design practices to the sCO2 turbine while also introducing the design of sCO2 compressor. The paper begins with an analysis of sCO2 cycles, their configurations for waste heat recovery and its comparison to a working steam cycle producing 15 MW net power in a coke oven plant. The sCO2 turbomachinery design follows from the boundary conditions imposed by the cycle and iterated with the cycle analysis for design point convergence. The design of waste heat recovery heat exchanger and other heat exchangers of the sCO2 cycle are not in the scope of this analysis. The design emphasis is on the sCO2 compressor and turbine that make up the power block. This paper highlights the design of a sCO2 compressor and turbine beginning from the specific speed-specific diameter (Ns-Ds) charts, followed by the meanline design. Subsequently, a detailed performance map is generated. The relevance of this paper is underscored by the first of a kind design and comparative analysis of a Brayton sCO2 power block with a working Steam Power block for the waste heat recovery in the energy intensive iron and steel industry.

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 Making shipping greener: comparative study between organic fluids and water for Rankine cycle waste heat recovery

2015 ◽  
Vol 14 (2) ◽  
pp. 70-84 ◽  
Author(s):  
Santiago Suárez de la Fuente ◽  
Alistair R. Greig
Keyword(s):  
Comparative Study ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Rankine Cycle ◽  
Organic Fluids
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