Study on SOFC-Stirling Engine Combined System : Fundamental Experiment on Heater Tube Heat Transfer

Abstract This work aims to determine the optimal heat sink fin shape to promote the efficient rise of hot air away from the heat sink. The heat transfer and convective flow dynamics external to a commercial Stirling engine are investigated. In particular, this study employs an adjoint optimization approach based on CFD simulations to determine the sensitivity of the objective function to the shape of the heat sink and influence on the natural convection heat flow away from the external heat sink. This deterministic optimization approach increases the heat transfer rate of the heat sink by nearly 20% in this study when performing a small number of design iterations.

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Heat Transfer and Fluid Dynamics Measurements in the Expansion Space of a Stirling Cycle Engine

Heat Transfer, Volume 1 ◽

10.1115/imece2006-15631 ◽

2006 ◽

Cited By ~ 2

Author(s):

Nan Jiang ◽

Terrence W. Simon

Keyword(s):

Heat Transfer ◽

High Efficiency ◽

Stirling Engine ◽

Transfer Coefficients ◽

Head Region ◽

Heat Transfer Coefficients ◽

Flow And Heat Transfer ◽

Engine Design ◽

Region Flow ◽

Design Calculations

The heater (or acceptor) of a Stirling engine, where most of the thermal energy is accepted into the engine by heat transfer, is the hottest part of the engine. Almost as hot is the adjacent expansion space of the engine. In the expansion space, the flow is oscillatory, impinging on a two-dimensional concavely-curved surface. Knowing the heat transfer on the inside surface of the engine head is critical to the engine design for efficiency and reliability. However, the flow in this region is not well understood and support is required to develop the CFD codes needed to design modern Stirling engines of high efficiency and power output. The present project is to experimentally investigate the flow and heat transfer in the heater head region. Flow fields and heat transfer coefficients are measured to characterize the oscillatory flow as well as to supply experimental validation for the CFD Stirling engine design codes. Presented also is a discussion of how these results might be used for heater head and acceptor region design calculations.

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

Advances in Environmental Engineering and Green Technologies - Optimum Design of Renewable Energy Systems ◽

10.4018/978-1-4666-5796-0.ch008 ◽

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.

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Study on Heat Transfer of Heat Exchangers in the Stirling Engine : Performance of Heat Exchangers in the Test Stirling Engine

JSME international journal Ser 2 Fluids engineering heat transfer power combustion thermophysical properties ◽

10.1299/jsmeb1988.35.4_647 ◽

1992 ◽

Vol 35 (4) ◽

pp. 647-652 ◽

Cited By ~ 1

Author(s):

Mitsuo KANZAKA ◽

Makio IWABUCHI

Keyword(s):

Heat Transfer ◽

Heat Exchangers ◽

Engine Performance ◽

Stirling Engine

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Performance Optimization and Parametric Analysis of a Class of Solar-Driven Heat Engines

ASME 2010 4th International Conference on Energy Sustainability, Volume 2 ◽

10.1115/es2010-90409 ◽

2010 ◽

Author(s):

Houcheng Zhang ◽

Lanmei Wu ◽

Guoxing Lin

Keyword(s):

Heat Transfer ◽

Heat Loss ◽

Performance Optimization ◽

Solar Collector ◽

Heat Engine ◽

Working Fluid ◽

Convection Heat ◽

Combined System ◽

Heat Engines ◽

Internal Irreversibility

A class of solar-driven heat engines is modeled as a combined system consisting of a solar collector and a unified heat engine, in which muti-irreversibilities including not only the finite rate heat transfer and the internal irreversibility, but also radiation-convection heat loss from the solar collector to the ambience are taken into account. The maximum overall efficiency of the system, the optimal operating temperature of the solar collector, the optimal temperatures of the working fluid and the optimal ratio of heat transfer areas are calculated by using numerical calculation method. The influences of radiation-convection heat loss of the collector and internal irreversibility on the cyclic performances of the solar-driven heat engine system are revealed. The results obtained in the present paper are more general than those in literature and the performance characteristics of several solar-driven heat engines such as Carnot, Brayton, Braysson and so on can be directly derived from them.

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