Performance of a Valveless Free Piston Linear Expander

Yıl 2025, Cilt: 66 Sayı: 720, 424 - 441, 30.09.2025

Furkan Kodakoglu , John Nuszkowski

Öz

The objective of this work was to achieve long-term steady state operation of a Valveless Free-Piston Linear Expander (FPLE). An experimental test bench was developed to measure the inlet and outlet temperatures, inlet and outlet pressures, flow rate, and voltage output. The trends of several output parameters such as frequency, average root mean square (RMS) voltage, volumetric efficiency, electrical-mechanical conversion efficiency, isentropic efficiency, irreversibility, actual expander work, and electrical power were presented. This first iteration FPLE achieved a maximum expander frequency of 44 Hz and a maximum isentropic efficiency of 21.5%.

Anahtar Kelimeler

Valveless Free Piston , Linear Expander , Experimental Performance Analysis , Low Temperature Heat Recovery

Serbest Piston Lineer Genişleticinin Performansı

Öz

Bu çalışmanın amacı, bir Vanasız Serbest Piston Lineer Genleştirici’nin (SPLG) uzun süreli sürekli rejim çalışmasını elde etmektir. Giriş ve çıkış sıcaklıklarını, giriş ve çıkış basınçlarını, debiyi ve voltaj çıktısını ölçmek için bir deneysel test düzeneği kuruldu. Frekans, voltaj ortalama karekök değeri, hacimsel verim, elektrik-mekanik dönüşüm verimi, izantropik verim, tersinmezlik, gerçek genleştirici işi ve elektrik gücü gibi birçok çıktı parametrelerinin eğilimleri sunuldu. SPLG’nin bu ilk çalışmasında, 44 Hz maksimum genleştirici frekansı ve %21,5 maksimum izantropik verim elde edildi.

Anahtar Kelimeler

Vanasız Serbest Piston , Lineer Genleştirici , Deneysel Performans Analizi , Düşük Sıcaklıklı Isı Geri Kazanımı

Teşekkür

Bu çalışma University of North Florida Mühendislik Fakültesi ve Hank Bonar tarafından desteklenmiştir. Ek olarak, Matt Hawn, Miranda Johanning, Kyle Parker, ve Blair Clarkson ilk prototipin imalatında yardım etmiştir.

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