The effect of different diffusers designed for empty cells in central air handling units on flow and pressure drop

Vakkasoglu, Ahmet Vakkas; Kamer, Muhammed Safa; Kaya, Ahmet

doi:10.1080/23744731.2020.1776536

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…al. [7] dalam penelitiannya menunjukkan bahwa kecepatan udara yang merupakan komponen penting untuk kenyamanan kondisi di dalam ruangan yang berventilasi, dapat berubah secara drastis tergantung pada jarak diffuser dari fan outlet. Selain itu, jelas bahwa karena kurangnya kapasitas distribusi udara yang efektif dari diffuser biasa, kondisi kenyamanan yang diperlukan tidak dapat dipertahankan dan juga sensor dalam sistem kontrol otomatis akan mengaktifkan sistem dengan nilai yang tidak tepat.…”

Section: Pendahuluanunclassified

Studi Numerik Pengaruh Geometri Supply Air Grille serta Variasi Kecepatan Udara Masuk Terhadap Distribusi Temperatur di Dalam Ruangan Terkondisi

Sudarma

Widianto²

2021

jtm

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Sistem pengkondisian udara adalah fasilitas utama untuk menciptakan kenyamanan termal pada suatu ruangan. SAG memegang peranan penting dalam mengatur penyebaran udara. Dalam penelitian ini dua buah tipe SAG dengan geometri berbentuk linear dan square diteliti secara numerik. Kecepatan aliran masuk divariasikan pada besaran 1,6, 3,1 dan 4,6 m/s dipelajari untuk mengetahui pengaruhnya terhadap distribusi temperatur. Hasil dari simulasi ditampilkan dalam bentuk kontur temperatur pada bidang horizontal dan gradien temperatur pada posisi vertikal. Analisis dilakukan terhadap hasil untuk mengetahui distribusi temperatur dan besaran temperatur rata-rata guna terciptanya kenyamanan termal. Hasil simulasi menunjukkan bahwa SAG tipe square mampu mendistribusi temperatur lebih merata dibandingkan tipe linear. Hasil lainnya juga memperlihatkan bahwa kenyamanan diraih oleh tipe square pada laju aliran yang lebih rendah dibandingkan dengan tipe linear.

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Section: Pendahuluanunclassified

Studi Numerik Pengaruh Geometri Supply Air Grille serta Variasi Kecepatan Udara Masuk Terhadap Distribusi Temperatur di Dalam Ruangan Terkondisi

Sudarma

Widianto²

2021

jtm

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Comparing of CFD Contours Using Image Analysing Method: A Study on Velocity Distributions

ERDOĞAN,

DAŞKIN

2023

Black Sea Journal of Engineering and Science

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Contour plotting, a widely utilized graphical technique for visualizing CFD (Computational Fluid Dynamics) outcomes, is highly valuable. It provides an effective and practical approach to analysing distributions of magnitudes belonging to fluid domains such as; velocity, temperature, pressure, volume fraction, etc. Nevertheless, when analysing multiple contours, especially showing similar distribution, identifying the ideal contour can be difficult and open to speculation. In this research, the issue was addressed by employing the Image Analysis Method for the classification of velocity distribution contours. This led to determining which picture has the best distribution among a few of the contour’s pictures. Firstly, velocity distribution contours downstream of the diffuser located in Air Handling Unit (AHU) unit were obtained by using CFD. The contour pictures were then transferred to MATLAB environment. With pixel analysis in MATLAB, the pictures were able to be classified based on which parameters had an effect on the velocity distribution. Variable parameters are the length of the fan channel (x) and the ratio of cross-sectional areas of the AHU (A/Ao). The results showed that x=250 mm and A/Ao=0.5 improved velocity distributions by 6% and 20%, respectively.

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Yüksek Basinçli Santri̇füj Fan Performansinin Deneysel Ve Sayisal İncelenmesi̇

KARAOKUR

AKAY

2022

Konya Journal of Engineering Sciences

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Centrifugal fans with the volute body; marble, wood, cement, textile, etc. It is used in the transport of various powders in industries. In order for the fans to be used in these applications to work efficiently, the fan performance must be well known. In this study, a high-pressure radial fan whose performance curves are unknown was tested in a wind tunnel designed according to ANSI/AMCA-210 standard and experimental fan performance curves were obtained. Then, performance parameters were calculated using computational fluid dynamics (CFD) methods. Differences between numerical and experimental results were obtained within acceptable limits and the optimum operating range of the fan was determined according to the performance curves obtained. The overlap of the theoretical and experimental approaches used in this study revealed that similar fans can be used as a tested example for the initial design or partial development of existing similar fans in future studies.

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The effect of different diffusers designed for empty cells in central air handling units on flow and pressure drop

Cited by 3 publications

References 10 publications

Studi Numerik Pengaruh Geometri Supply Air Grille serta Variasi Kecepatan Udara Masuk Terhadap Distribusi Temperatur di Dalam Ruangan Terkondisi

Studi Numerik Pengaruh Geometri Supply Air Grille serta Variasi Kecepatan Udara Masuk Terhadap Distribusi Temperatur di Dalam Ruangan Terkondisi

Comparing of CFD Contours Using Image Analysing Method: A Study on Velocity Distributions

Yüksek Basinçli Santri̇füj Fan Performansinin Deneysel Ve Sayisal İncelenmesi̇

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