PENGUJIAN KARAKTERISTIK PERPINDAHAN PANAS DAN PENURUNAN TEKANAN DARI SIRIP - SIRIP PIN PERSEGI BERLUBANG SUSUNAN SELANG - SELING DALAM SALURAN SEGIEMPAT

, SAHENDRA (2010) PENGUJIAN KARAKTERISTIK PERPINDAHAN PANAS DAN PENURUNAN TEKANAN DARI SIRIP - SIRIP PIN PERSEGI BERLUBANG SUSUNAN SELANG - SELING DALAM SALURAN SEGIEMPAT. Other thesis, Universitas Sebelas Maret.

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    Abstract

    This research was conducted to investigate the characteristics of heat transfer and pressure drop as well as the thermal performance of perforated square pin fin array in the rectangular channel which air passed through it as coolant fluid. The pin fins were arranged in staggered manner. Dimension of base plate in which pin fins were attached was 150 mm x 200 mm x 6.5 mm. The average temperature of the base plate surface was kept constant at 60 o C. Pin fins were made of duralumin having the dimension of 75 mm of height, with 12.7 mm x 12.7 mm of sides, hole diameter of 6 mm which have the distance 15 mm from the base of fins, and the distance inter-fin pitch in the spanwise direction was kept constant at Sx/D= 2.95. The parameters of this research were Reynolds number (Re) 3,119 – 37,840 based on averaged inlet air velocity and hydraulic diameter of rectangular channel, and the distance between the inter-fin pitch in the streamwise direction (Sy/D =1.97 – 3.94) The research shows that the increasing Reynolds number and decreasing the distance Sy/D increased Nusselt number (Nu), that means increased heat transfer rate where it reach maximum at Sy/D =2.36. The values of pressure drop (DP) and friction factor (f) decreased with increasing Sy/D. Thermal performance decreased with increasing Reynolds number. The thermal performances (h) varied between 0.72 – 1.26. The increasing of Reynolds number would decrease the thermal performances (h) for all Sy/D. A net energy gain can be achieved up to 26% for the value of Sy/D = 2.36 and Re = 3,122. Keywords : Perforated square pin fin, Reynolds number, Nusselt Number, friction factor, thermal performance.

    Item Type: Thesis (Other)
    Subjects: T Technology > TJ Mechanical engineering and machinery
    Divisions: Fakultas Teknik > Teknik Mesin
    Depositing User: Lia Primadani
    Date Deposited: 21 Aug 2013 18:44
    Last Modified: 21 Aug 2013 18:44
    URI: https://eprints.uns.ac.id/id/eprint/10231

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