Archive for the ‘Analysis Tools’ Category

Engine 3F Efficiency Analysis part 4

Wednesday, July 21st, 2010

Rev 1: See details at bottom. Let me summarize what has been covered and what remains in this efficiency analysis: Component Power percentage of total power Efficiency analysis Heat lost directly to the environment 40.3w 58.4% Part 1 ...

Engine 3F Efficiency Analysis part 3

Wednesday, July 7th, 2010

Let me summarize what has been covered and what remains in this efficiency analysis: Component Power percentage of total power Efficiency analysis Heat lost directly to the environment 40.3w 58.4% Part 1 Thermal shorting: heat conduction directly from the hot end to the cold end 5.9w 8.6% Part ...

Engine 3F Efficiency Analysis part 2

Saturday, July 3rd, 2010

Continuing with the analysis of where the input power (heat) to the engine goes, the next item to consider is the conduction loss often referred to as thermal shorting. Conduction losses A Stirling engine of gamma configuration, such as the one being considered, uses a displacer to shuttle ...

Engine 3F Efficiency Analysis part 1

Thursday, July 1st, 2010

In an earlier post I measured 1.05 watts output from my engine 3F using a 69 watt input. This computes to 1.5% efficiency. So where did the other 68 watts go? The following is my analysis of where all the energy went. It won’t be as rigorous as I would ...

Stirling Engine Simulator & Guide

Friday, November 13th, 2009

Stirling Engine Simulator I recently added a Stirling engine simulator to this site. It’s shown on your right in the navigation bar under the Pages heading. The guide below should be helpful to those interested in using the simulator. In the future I’ll post more information on using the simulator and ...

Ideal Stirling Cycle Spreadsheet

Tuesday, June 24th, 2008

  This Excel 2003 spreadsheet stirling-cycle-ideal-v-02 lets you input the basic values for a Stirling cycle engine and calculates various quantities such as pressures, work in, work out, heating, cooling, and ideal efficiency. Don’t use this spreadsheet with the idea that your engine will get close to the values it shows ...