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Hacker News
@h4ckernews@mastodon.social  ·  activity timestamp 3 days ago

Stirling Cycle Machine Analysis

https://ohioopen.library.ohio.edu/opentextbooks/9/

#HackerNews #StirlingCycle #MachineAnalysis #EnergyEfficiency #Thermodynamics #Engineering #Innovation

OHIO Open Library

Stirling Cycle Machine Analysis

Dedicated to William T. Beale (1928 - 2016), inventor of the Free Piston Stirling Engine, Mentor and Frien. This web resource is intended to be totally self contained learning resource for the analysis and development of computer simulation of single phase, piston/cylinder Stirling cycle machines. It includes thermodynamic, heat transfer and fluid flow friction analysis, and until 2012 it was used as resource material for an advanced course for Mechanical Engineering majors. The course structure was based on the book by I.Urieli & D.M.Berchowitz 'Stirling Cycle Engine Analysis' (Adam Hilger, 1984). The computer simulation program modules (originally written in FORTRAN) have all been updated and rewritten in MATLAB, a convenient interactive language which allows direct graphical output - essential for Stirling cycle analysis. A complete set of all the m-files are developed and provided, and they can be augmented and adapted as needed for specific engine/refrigerator configurations. It is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International license and as such is freely available. Comments and constructive criticism are welcomed by the author. Chapter 1: Background and Introduction Chapter 2: Basic Engine Configurations Chapter 3: Ideal Isothermal Analysis We define and analyze the Ideal Isothermal model of a Stirling engine, including the Schmidt Analysis, and discuss its limitations. One obviously incorrect conclusion of this analysis is that all three heat exchangers are redundant, and only contribute dead space, since all required heat transfer processes occur in the isothermal compression and expansion spaces. Nevertheless we can obtain a better understanding of a specific design, particularly when we augment the solution with Allan Organ's particle mass flow analysis. Chapter 4: Ideal Adiabatic Analysis We find that the Ideal Isothermal analysis predicts that the heat exchangers of a Stirling engine are redundant, thus we cannot seriously use this model to predict the ideal performance of an actual machine. We thus turn to an alternative model in which the compression and expansion spaces are adiabatic. We find that there is no closed form solution to this model and we have to resort to computer simulation. We gain various insights from using this model in particular with regards to the importance of the regenerator, which was not understood for a significant period. Chapter 5: Simple Analysis This analysis approach uses the Ideal Adiabatic model as a basis to predict the real performance of the three heat exchanger sections, particularly with regards to heat transfer and
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Hacker News
Hacker News
@h4ckernews@mastodon.social  ·  activity timestamp 5 days ago

Left in the cold: Study finds most renters shut out of energy-saving upgrades

https://www.binghamton.edu/news/story/6011/left-in-the-cold-study-finds-most-renters-shut-out-of-energy-saving-upgrades

#HackerNews #energyEfficiency #renters #rights #sustainability #housing #crisis

Left in the cold: Study finds most renters shut out of energy-saving upgrades | Binghamton News - Binghamton University

Left in the cold: Study finds most renters shut out of energy-saving upgrades - Binghamton News

New research from Binghamton faculty reveals renters nationwide can’t take advantage of energy efficiency efforts.
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Chip Butty boosted
br00t4c
br00t4c
@br00t4c@mastodon.social  ·  activity timestamp 2 months ago

Cuts to insulation scheme will leave homes cold over winter, experts say

#SustainableEnergy #PolicyChange #InsulationCuts #ClimateAction #EnergyEfficiency

https://www.theguardian.com/society/2025/nov/29/insulation-scheme-cuts-winter-warning-retrofit-firms

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br00t4c
br00t4c
@br00t4c@mastodon.social  ·  activity timestamp 2 months ago

Cuts to insulation scheme will leave homes cold over winter, experts say

#SustainableEnergy #PolicyChange #InsulationCuts #ClimateAction #EnergyEfficiency

https://www.theguardian.com/society/2025/nov/29/insulation-scheme-cuts-winter-warning-retrofit-firms

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Agaric Tech Collective and 1 other boosted
Danny Garside
Danny Garside
@da5nsy@social.coop  ·  activity timestamp 3 months ago

Is there a #lowtech #mastodon / #fediverse client, or server (fork)?

Thinking something which minimises bandwidth/power/storage consumption, like the work which has been done on @lowtechmagazine (https://solar.lowtechmagazine.com/about/the-solar-website/#how)

#energyEfficiency #minimalComputing #LowTech

An old photograph of people working at a switchboard. The image is dithered and monocolor.
An old photograph of people working at a switchboard. The image is dithered and monocolor.
An old photograph of people working at a switchboard. The image is dithered and monocolor.
LOW←TECH MAGAZINE

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This website is solar-powered and self-hosted. It has been designed to radically reduce the energy use associated with accessing our content.
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Danny Garside
Danny Garside
@da5nsy@social.coop  ·  activity timestamp 3 months ago

Is there a #lowtech #mastodon / #fediverse client, or server (fork)?

Thinking something which minimises bandwidth/power/storage consumption, like the work which has been done on @lowtechmagazine (https://solar.lowtechmagazine.com/about/the-solar-website/#how)

#energyEfficiency #minimalComputing #LowTech

An old photograph of people working at a switchboard. The image is dithered and monocolor.
An old photograph of people working at a switchboard. The image is dithered and monocolor.
An old photograph of people working at a switchboard. The image is dithered and monocolor.
LOW←TECH MAGAZINE

About the Solar Powered Website

This website is solar-powered and self-hosted. It has been designed to radically reduce the energy use associated with accessing our content.
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