An air-charged Stirling-cycle refrigerator with novel isothermalisers

Ja'far M Daoud*, Daniel Friedrich

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

While the Stirling cycle is a simple thermodynamic cycle, energy dense machines are expensive and complex due to the complicated heat exchangers. Heat exchangers are essential to increase the heat transfer but they increase the dead volume, cost and pumping losses. In this contribution, a simple and novel isothermaliser is proposed that improves the cooling power density of the Stirling-cycle refrigerator without adding to the dead volume. Simulations based on the second order polytropic model show that the cooling power and efficiency can be enhanced and the regenerator losses can be significantly reduced. The novel isothermaliser leads to better performance than the conventional Stirling refrigerator at temperatures of 27/7o C achieving higher cooling density per swept volume of 2.5 folds. The increased power density enables the Stirling refrigerator to compete with the vapour compression cycle in both high-lift and near-ambient refrigeration.
Original languageEnglish
Title of host publication10th Heat Powered Cycles Conference Proceedings
Number of pages12
Publication statusPublished - 1 Dec 2023
Event10th Heat Powered Cycles Conference - The University of Edinburgh, Appleton Tower, Edinburgh, United Kingdom
Duration: 3 Sept 20236 Sept 2023


Conference10th Heat Powered Cycles Conference
Country/TerritoryUnited Kingdom

Keywords / Materials (for Non-textual outputs)

  • Stirling cycle
  • Near-ambient refrigeration
  • Isothermalisers


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