Characteristics of PEFC / Woody Biomass Engine Hybrid Microgrid and Exergy Analysis

2014 ◽  
pp. 237-281
Keyword(s):  
Exergy Analysis ◽  
Woody Biomass ◽  
Response Characteristic ◽  
Cell System ◽  
Stirling Engine ◽  
Combined System ◽  
Hybrid Microgrid ◽  
Exhaust Heat ◽  
City Gas ◽  
The City

This chapter consists of three sections, ‘Dynamic Characteristics of PEFC / Woody Biomass Engine Hybrid Microgrid’, ‘Exergy Analysis of the Woody Biomass Stirling Engine and PEFC Combined System with Exhaust Heat Reforming’ and ‘Exergy Analysis of A Regional Distributed PEM Fuel Cell System’. The chapter describes the exhaust heat of the combustion of woody biomass engine using a Stirling cycle that was used for the city gas reforming reaction of a PEFC system. The response characteristic of PEFC and woody biomass engine is investigated by the experiment and numerical analysis. Finally, a combined system that uses the exhaust heat of the woody biomass Stirling engine for the steam reforming of city gas and that supplies the produced reformed gas to a PEFC is proposed.

scholarly journals Exergy analysis and economic estimate of a novel solar and gas combined system

2021 ◽  
Vol 25 ◽  
pp. 100929
Author(s):  
Gang Wang ◽  
Shukun Wang ◽  
Tieliu Jiang ◽  
Zeshao Chen
Keyword(s):  
Exergy Analysis ◽  
Combined System

Exergy Analysis of a Hybrid Micro Gas Turbine Fuel Cell System Based on Existing Components

2012 ◽  
Author(s):  
D. P. Bakalis ◽  
A. G. Stamatis
Keyword(s):  
Fuel Cell ◽  
Hybrid System ◽  
Exergy Analysis ◽  
Cell System ◽  
System Component ◽  
Utilization Factor ◽  
Fuel Cell Stack ◽  
Micro Gas Turbine ◽  
Partial Load ◽  
Set Up

A hybrid system based on an existing recuperated microturbine and a pre-commercially available high temperature tubular solid oxide fuel cell is modeled in order to study its performance. Individual models are developed for the microturbine and fuel cell generator and merged into a single one in order to set up the hybrid system. The model utilizes performance maps for the compressor and turbine components for the part load operation. The full and partial load exergetic performance is studied and the amounts of exergy destruction and efficiency of each hybrid system component are presented, in order to evaluate the irreversibilities and thermodynamic inefficiencies. Moreover, the effects of various performance parameters such as fuel cell stack temperature and fuel utilization factor are investigated. Based on the available results, suggestions are given in order to reduce the overall system irreversibility. Finally, the environmental impact of the hybrid system operation is evaluated.

Modeling of a Direct Carbon Fuel Cell System

2010 ◽  
Vol 7 (5) ◽  
Author(s):  
K. Hemmes ◽  
M. Houwing ◽  
N. Woudstra
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Exergy Analysis ◽  
Cell System ◽  
System Model ◽  
System Level ◽  
Molten Carbonate ◽  
Bench Scale ◽  
Direct Carbon Fuel Cell ◽  
Molten Carbonate Fuel Cells

Direct carbon fuel cells (DCFCs) have great thermodynamic advantages over other high temperature fuel cells such as molten carbonate fuel cells (MCFCs) and solid oxide fuel cells. They can have 100% fuel utilization, no Nernst loss (at the anode), and the CO2 produced at the anode is not mixed with other gases and is ready for re-use or sequestration. So far, only studies have been reported on cell development. In this paper, we study the performance of a CO2-producing DCFC system model. The theoretically predicted advantages that are confirmed on a bench scale are also confirmed on a system level, except for the production of pure CO2. Net system efficiencies of around 78% were found for the developed system. An exergy analysis of the system shows where the losses in the system occur. If the cathode of the DCFC must be operated as a standard MCFC cathode, the required CO2 at the cathode is the reason why a large part of the pure CO2 from the anode is recycled and mixed with the incoming air and cannot be used directly for sequestration. Bench scale studies should be performed to test the minimum amount of CO2 needed at the cathode. This might be lower than in a standard MCFC operation due to the pure CO2 at the anode side that enhances diffusion toward the cathode.

scholarly journals Design, Construction, and Testing of a Gasifier-Specific Solid Oxide Fuel Cell System

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1985 ◽  
Author(s):  
Alvaro Fernandes ◽  
Joerg Brabandt ◽  
Oliver Posdziech ◽  
Ali Saadabadi ◽  
Mayra Recalde ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Exergy Analysis ◽  
Thermodynamic Simulation ◽  
Cell System ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Cell System ◽  
Simulation Results ◽  
Design Construction

This paper describes the steps involved in the design, construction, and testing of a gasifier-specific solid oxide fuel cell (SOFC) system. The design choices are based on reported thermodynamic simulation results for the entire gasifier- gas cleanup-SOFC system. The constructed SOFC system is tested and the measured parameters are compared with those given by a system simulation. Furthermore, a detailed exergy analysis is performed to determine the components responsible for poor efficiency. It is concluded that the SOFC system demonstrates reasonable agreement with the simulated results. Furthermore, based on the exergy results, the components causing major irreversible performance losses are identified.

Comparison and Synthesis of Performance and Aerodynamic Modeling of a Pass-Off Turbofan Engine Test Cell

2015 ◽  
Author(s):  
Martin Marx ◽  
Michael Kotulla ◽  
André Kando ◽  
Stephan Staudacher
Keyword(s):  
Research Effort ◽  
Engine Performance ◽  
Cell System ◽  
Performance Model ◽  
Test Cell ◽  
Test Facility ◽  
Engine Test ◽  
Combined System ◽  
Installation Effects ◽  
Engine Testing

To ensure the quality standards in engine testing, a growing research effort is put into the modeling of full engine test cell systems. A detailed understanding of the performance of the combined system, engine and test cell, is necessary e.g. to assess test cell modifications or to identify the influence of test cell installation effects on engine performance. This study aims to give solutions on how such a combined engine and test cell system can be effectively modeled and validated in the light of maximized test cell observability with minimum instrumentation and computational requirements. An aero-thermodynamic performance model and a CFD model are created for the Fan-Engine Pass-Off Test Facility at MTU Maintenance Berlin-Brandenburg GmbH, representing a W-shape configuration, indoor Fan-Engine test cell. Both models are adjusted and validated against each other and against test cell instrumentation. A fast-computing performance model is delivering global parameters, whereas a highly-detailed aerodynamic simulation is established for modeling component characteristics. A multi-disciplinary synthesis of both approaches can be used to optimize each of the specific models by calibration, optimized boundary conditions etc. This will result in optimized models, which, in combination, can be used to assess the respective design and operational requirements.

City gas distribution projects delay in India: a critical assessment of risks

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Atul Rawat ◽  
Sumeet Gupta ◽  
T. Joji Rao
Keyword(s):  
Risk Factors ◽  
Distribution Network ◽  
Management Approach ◽  
Financial Risks ◽  
Gas Distribution ◽  
Content Type ◽  
City Gas ◽  
Score Method ◽  
The City ◽  
Network Project

Purpose This study aims to identify and rank the operational and financial risks causing a delay in the commencement of the city gas distribution project in India. Design/methodology/approach This study reviews the literature to identify operational and financial risks variables associated with infrastructure projects. Followed by a survey to isolate and assess the critical risk factors for city gas distribution network project in India. The survey data is evaluated using factor analysis to understand the latent structure of the critical risk factors. Second, the author ranks the identified variables as per significance by using the mean score method. Findings Five critical risk factors with 20 variables were extracted and assessed to build more understanding of their significance and impact on city gas distribution network project. Originality/value This study is the first attempt to follow the management approach to identify and rank operational and financial risks impacting city gas distribution project.

The unforeseen global pandemic as a key factor to the city gas growth in Indonesia

2021 ◽  
Author(s):  
Lisa Samura ◽  
Andry Prima ◽  
Mustamina Maulani ◽  
Astri Rinanti ◽  
Bayu Satiyawira ◽  
...  
Keyword(s):  
Global Pandemic ◽  
Key Factor ◽  
City Gas ◽  
The City
Sign in / Sign up

Export Citation Format

Share Document