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Indra Mamad Gandidi
Jurusan Teknik Mesin, Fakultas Teknik Universitas Lampung
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Journal : Jurnal Mechanical

 1 
Analisa Perpindahan Panas Konveksi Aliran di Atas Permukaan Berkas Pipa: Sebuah Kajian Literatur Indra Mamad Gandidi
JURNAL MECHANICAL Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Heat transfer in flow across bank of tubes is of particular importance in the design of heat exchangers. Heat exchangers are found in numerous industrial applications, such as steam generation in a boiler or air cooling in the coil of an air conditioner. The Zakauskas’s correlation from the experimental data is more popular method that used to design of cross flow of heat exchanger. However, due to optimization process and more efficiency, several empirical equations were generated through the analytical and CFD methods. Hence, this paper was intended to perform a comprehensive study to analyze the heat transfer calculation of cross flow heat exchanger by using several methods in which it has been reported. Among of four methods are analyzed, the analytic method, normalization equations from CFD and Grimison’s correlation have good agreement to used for design of cross flow heat exchanger with the compact and non-compact configuration, while correlation of Zakauskas is only suitable for non-compact configuration.
Simulasi Proses Torefaksi Sampah Sistem Kontinu Menggunakan Software Aspen Plus Amrul Amrul; Dedi Triyadi; Indra Mamad Gandidi
JURNAL MECHANICAL Vol 10, No 1 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v10.i1.201904

Abstract

Studi Reduksi Beban Termal ke Dalam Ruangan Secara Konveksi dengan Sistem Underground Thermal Storage Sebagai Altenatif untuk Mendinginkan Ruangan Rumah Hunian Indra Mamad Gandidi
JURNAL MECHANICAL Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Space cooling is required all year around in the tropics area especially Indonesia. To provide the space cooling requirement, the electricity cost and environment impact are important aspect that  it must be considered. The household in the tropical area is real conditions  require a cooling device and greatest potential to use alternative cooling.  In fact, solar radiation over the roof surface can be thrown to the environmental by convection mechanism in order to the room can be remaining in comfortable condition.The experimental investigation was performed to two model of household. That is household without and  using evaporator, respectively. Also in this reasearch, evaporator was placed in two location, over and or under surface of the roof.  Water from underground thermal storage is used as a working fluid to pick up amount of heat over the roof and then rejected on thermal storage environment. The mesurement of experimental data was conducted start from 08.00 WIB to 17.00 WIB. Roof temperature will fluctuation with raise of time start from the morning to evening. The maximum temperature difference between household without and with evaporator are ± 12 0C with water mass flow rate 0.0125 kg/s and ± 8 0C with water mass flow rate 0.0187 kg/s for evaporator over and under the surface of the roof respectively.This research result have still uncomfortable condition for household. However, this research can be used as an initial step to build up a cooling system with low cost of electrical power and environmental friendly. Moreover, thermal reduction on the wall and the window to increase in the performance of this method are necessary. Then,  the impromevent of roof geometry has to performed to keep the maximum interface area of heat transfer.  Keywords: convection mechanism, space cooling, household
Co-Authors Ali Mustofa Amrul Amrul Andicha Aulia Putra Asep Bayu Dani Nandiyanto Candra Aditia Agustian Candra Aditia Agustian, Candra Aditia Dedi Triyadi Fiandini, Meli Harmen Burhanuddin Harmen Burhanuddin, Harmen M. Dyan Susila Mahmudatussa'adah, Ai Neni Susanti Neni Susanti, Neni Rachmat Cahaya Putra Rachmat Cahaya Putra, Rachmat Cahaya Ragadhita, Risti Reno Raines Sukrawan, Yusep