FG Exergiebasierte Methoden für kältetechnische Systeme

9 Items

Recent Submissions
Exergy-based investigation and optimization of a heat-driven polygeneration system using carbon dioxide as working fluid

Luo, Jing (2021)

To achieve global sustainable development goals, efficiency improvement of sustainable energy systems is the most cost-effective and near-term option. Polygeneration systems improve system efficiency significantly and minimize the discharge of system pollutants. In this work, a novel small-scale waste heat-driven polygeneration system using CO2 as its working fluid was proposed for local power ...

Investigation of off‐design characteristics of an improved recompression supercritical carbon dioxide cycle for concentrated solar power application

Ma, Yuegeng ; Morosuk, Tatiana ; Liu, Ming ; Liu, Jiping (2020-09-02)

The off‐design characteristics of an improved recompression supercritical carbon dioxide cycle integrated with a two‐stage intercooled main compressor are investigated with a focus on the concentrated solar power application. An off‐design model is established for each crucial component of the cycle system of 100‐megawatt scale. Four cycle control schemes with different main compressor configur...

Exergy-Based Analysis and Optimization of an Integrated Solar Combined-Cycle Power Plant

Elmorsy, Louay ; Morosuk, Tatiana ; Tsatsaronis, George (2020-06-13)

The transition towards higher shares of electricity generation from renewable energy sources is shown to be significantly slower in developing countries with low-cost fossil fuel resources. Integrating conventional power plants with concentrated solar power may facilitate the transition towards a more sustainable power production. In this paper, a novel natural gas-fired integrated solar combin...

Exergy and Exergoeconomic Analysis of a Cogeneration Hybrid Solar Organic Rankine Cycle with Ejector

Tashtoush, Bourhan ; Morosuk, Tatiana ; Chudasama, Jigar (2020-06-24)

Solar energy is utilized in a combined ejector refrigeration system with an organic Rankine cycle (ORC) to produce a cooling effect and generate electrical power. This study aims at increasing the utilized share of the collected solar thermal energy by inserting an ORC into the system. As the ejector refrigeration cycle reaches its maximum coefficient of performance (COP), the ORC starts workin...

Superstructure-Based Optimization of Vapor Compression-Absorption Cascade Refrigeration Systems

Mussati, Sergio F. ; Morosuk, Tatiana ; Mussati, Miguel C. (2020-04-10)

A system that combines a vapor compression refrigeration system (VCRS) with a vapor absorption refrigeration system (VARS) merges the advantages of both processes, resulting in a more cost-effective system. In such a cascade system, the electrical power for VCRS and the heat energy for VARS can be significantly reduced, resulting in a coefficient of performance (COP) value higher than the value...

Optimal design of supercritical carbon dioxide cycle based system for concentrated solar power application

Ma, Yuegeng (2020)

Concentrated solar power (CSP) is a promising alternative to conventional fossil fuel energy for the future electricity generation. Upgrading the power block with a supercritical carbon dioxide (S-CO2) cycle is regarded as a promising approach to achieving better efficiency and lower levelized cost of electricity (LCOE) for the CSP plant. This work performs an optimal design of the S-CO2 cycl...

Exergetic and Economic Evaluation of a Transcritical Heat-Driven Compression Refrigeration System with CO2 as the Working Fluid under Hot Climatic Conditions

Luo, Jing ; Morosuk, Tatiana ; Tsatsaronis, George ; Tashtoush, Bourhan (2019-11-28)

The purpose of this research is to evaluate a transcritical heat-driven compression refrigeration machine with CO2 as the working fluid from thermodynamic and economic viewpoints. Particular attention was paid to air-conditioning applications under hot climatic conditions. The system was simulated by Aspen HYSYS® (AspenTech, Bedford, MA, USA) and optimized by automation based on a genetic algor...

Cryogenic energy storage systems

Hamdy, Sarah (2019)

Grid-scale energy storage systems are capable of providing the needed flexibility to the power grid operators in order to ensure a secure power supply with increasing shares of highly intermittent electricity generation from renewable energy sources. Cryogenic energy storage (CES) is a grid-scale energy storage concept in which electricity is stored in the form of liquefied gas enabling a remar...

Model-Based Cost Optimization of Double-Effect Water-Lithium Bromide Absorption Refrigeration Systems

Mussati, Sergio F. ; Mansouri, Seyed Soheil ; Gernaey, Krist V. ; Morosuk, Tatiana ; Mussati, Miguel C. (2019-01-19)

This work presents optimization results obtained for a double-effect H2O-LiBr absorption refrigeration system considering the total cost as minimization criterion, for a wide range of cooling capacity values. As a model result, the sizes of the process units and the corresponding operating conditions are obtained simultaneously. In this paper, the effectiveness factor of each proposed heat exch...