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Архивы рубрики: A LOW TEMPERATURE DIFFERENTIAL STIRLING ENGINE FOR POWER GENERATION

Modern Advances

After Philips cancelled their Stirling engine development programme in the 1950’s, little advancement in Stirling engines took place for the next two decades. It is likely at this point that any development of a Stirling engine for commercial gain was considered unfeasible, after seeing the financial failure of the Philips programme. Despite this, a radical

Technological Advances

Over the course of the next 30 years, several other designs appeared offering innovations such as the open cycle engine (Ericsson, 1860) which replenished the hot air in each cycle with fresh cold air, doing away with cooling difficulties but causing great heat losses and an efficiency of just over 2% [9]. Ways to increase

History

“As you enter the past, you willfind direction for the future” [9] During the industrial revolution of the 18th century the steam engine was widely employed as a prime actuator for all sorts of industrial applications such as pumping, lifting heavy loads and driving rotating machinery. The technology in steam engines had developed by the

Introduction

Energy seems to be the subject at the heart of many of the greatest issues and debates facing the world today. Global warming is a huge issue that promises to change the face of the planet in unimaginable and irreversible ways. It is without question that governments and industry in the developed world must do

List of Acronyms and Abbreviations

ASC — Advanced Stirling Converter BDC — Bottom Dead Centre CHP — Combined Heat and Power HEV — Hybrid Electric Vehicle IC — Internal Combustion ID — Inside Diameter LMTD — Log Mean Temperature Difference LTD — Low Temperature Differential NASA — National Aeronautics and Space Administration NTU — Number of Transfer Units OD —

Nomenclature

Symbol Definition Unit Aff Cross-sectional flow area M2 Ao Heat transfer area M2 Cp Specific heat at constant pressure J/kg. K Cv Specific heat at constant volume J/kg. K Cw Friction factor — D Inner diameter M D Outer diameter M Dh Hydraulic diameter M Dw Diameter of matrix material wire/fibre M Fs Schmidt Factor

Abstract

There are many sources of free energy available in the form of heat that is often simply wasted for want of an effective way to convert it into useful energy such as electricity. The aim of this research project is to design and build a low temperature differential Stirling engine capable of generating electric power

Preface

This project forms part of a larger research effort being conducted at the University of Canterbury concentrating on Stirling engines. The research is focused primarily around using low-temperature differential Stirling engines in the field of power generation and considers key factors relating to scalability to large-scale generation and the commercial viability of such engines. Several

A LOW TEMPERATURE DIFFERENTIAL STIRLING ENGINE FOR POWER GENERATION

A special thanks to all workshop staff, in particular David Healy, who put up with me and my large project taking up all of their valuable space. This also includes Seth Jones and Gordon Baikie who were a huge help in putting the engine together. A big thanks to my supervisor Paul Gaynor who oversaw