scholarly journals ANALISIS KINERJA PIPA KALOR LURUS MENGGUNAKAN SUMBU KAPILER SCREEN MESH 300 DENGAN MEMVARIASIKAN FILLING RASIO

2020 ◽  
Vol 2 (2) ◽  
pp. 133-138
Author(s):  
Iwan Setyawan ◽  
Sandy Reynaldy Riawan ◽  
Sri Poernomo Sari ◽  
Ridwan
Keyword(s):  
Data Aquisition ◽  
Screen Mesh

Pipa kalor merupakan salah satu jenis pendingin yang memanfaatkan sistem dua fase yang memiliki kemampuan memindahkan kalor yang cukup tinggi. Perangkat ini tidak mengkonsumsi energi mekanik dan kinerja termal tergantung pada struktur sumbu. Tujuan penelitian ini adalah untuk membuat pipa kalor lurus tembaga dengan sumbu kapiler Screen Mesh 300 sebanyak 6 layer.  Pada penelitian ini dilakukan pengujian dengan memvariasikan filling rasio, FR40%,60% dan 80%. Pengambilan data diambil menggunakan data aquisition Labjack U6 Pro. Termokopel ditempatkan di beberapa titik kemudian diolah dengan sistem labview. Dari hasil penelitian, didapatkan temperatur steady evaporator tertinggi dengan Filling Rasio 40% pada beban kalor 10W sampai 175W.  Untuk FR 80% menghasilkan temperatur evaporator yang paling rendah pada beban kalor 10W hingga 100W.  Untuk beban kalor yang lebih tinggi 175W hingga 275W, FR 60% menghasikan temperature evaporator terendah diantara FR 40% dan FR 80%. Selanjutnya, tahanan termal pada FR 80% menghasilkan nilai terbesar untuk semua beban kalor. Sedangkan FR 60% menghasilkan tahanan termal yang hampir sama dengan dengan FR 80% untuk beban kalor 25W hingga 275W. Namun demikian pada beban kalor 10W, FR 60% menghasilkan tahanan termal yang lebih rendah diantara FR40% dan FR 80%. Dengan demikian, dari hasil temperatur dan tahanan termal untuk pipa kalor dengan range beban kalor yang yang lebih luas, FR 60% menghasilkan kinerja terbaik dibandingkan FR 80% dan FR 40%.      

Chemical structure of diamond-like carbon thin films

1990 ◽  
Vol 48 (4) ◽  
pp. 710-711
Author(s):  
N.-H. Cho ◽  
K.M. Krishnan ◽  
D.B. Bogy
Keyword(s):  
Electrical Resistivity ◽  
Chemical Structure ◽  
Diamond Like Carbon ◽  
Chemical Structures ◽  
Sputtering Power ◽  
Data Aquisition ◽  
Equilibrium Phases ◽  
Electron Energy Loss ◽  
Power Densities ◽  
Preparation Techniques

Diamond-like carbon (DLC) films have attracted much attention due to their useful properties and applications. These properties are quite variable depending on film preparation techniques and conditions, DLC is a metastable state formed from highly non-equilibrium phases during the condensation of ionized particles. The nature of the films is therefore strongly dependent on their particular chemical structures. In this study, electron energy loss spectroscopy (EELS) was used to investigate how the chemical bonding configurations of DLC films vary as a function of sputtering power densities. The electrical resistivity of the films was determined, and related to their chemical structure.DLC films with a thickness of about 300Å were prepared at 0.1, 1.1, 2.1, and 10.0 watts/cm2, respectively, on NaCl substrates by d.c. magnetron sputtering. EEL spectra were obtained from diamond, graphite, and the films using a JEOL 200 CX electron microscope operating at 200 kV. A Gatan parallel EEL spectrometer and a Kevex data aquisition system were used to analyze the energy distribution of transmitted electrons. The electrical resistivity of the films was measured by the four point probe method.

Temporal deterioration in thermal performance of screen mesh wick straight heat pipe using surfactant free aqueous nanofluids

2016 ◽  
Vol 53 (1) ◽  
pp. 241-251 ◽  
Author(s):  
Bhupinder Singh Bhullar ◽  
D. Gangacharyulu ◽  
Sarit K. Das
Keyword(s):  
Heat Pipe ◽  
Thermal Performance ◽  
Screen Mesh

scholarly journals Quality of screen printing in knit fabric for different mesh count on semi solid design

2020 ◽  
Vol 6 (6) ◽  
Author(s):  
Rasheda Begum Dina ◽  
Md Zulhash Uddin ◽  
UmmulKhair Fatema
Keyword(s):  
Screen Printing ◽  
Visual Assessment ◽  
Color Difference ◽  
Mesh Screen ◽  
Microscope Images ◽  
Different Types ◽  
Digital Microscope ◽  
Semi Solid ◽  
Screen Mesh

In semi solid design, the parameters of the quality of the printed fabric were color fastness, level of print detail, color difference, print coverage, saw-tooth effect, line sharpness etc. Actually, printed fabric quality was evaluated by these parameters. Again, print coverage, saw-tooth effect, line sharpness, etc. were examined by estimating different distances, angles etc. in printed fabric and these factors were compared with image positives. Mesh opening effect on the quality of screen printed fabric was investigated after printing the semi solid design on knit fabric using different mesh count screens and different types of the link. To print semi solid design on knit fabric different types of ink as well as non-identical mesh count was used. Then mesh screen out come on the design and form of printed fabric in screen printing was examined. For the evaluation of semi solid design effect there remains two different methods.The first one is visual assessment and another way is microscope observation. Here, to determine the probability of the amount of ink flowing by the screen, mesh opening area of every screen was considered and it was done from respective digital microscope images.

A Feasibility Study About Using SiO2Nanofluid Screen Mesh Wick Heat Pipe for Cooling of High-Power LEDs

2015 ◽  
Vol 37 (9) ◽  
pp. 741-750 ◽  
Author(s):  
Yiwei Wang ◽  
Jianxin Zhang ◽  
Jiwen Cen ◽  
Fangming Jiang
Keyword(s):  
Heat Pipe ◽  
Feasibility Study ◽  
High Power ◽  
Screen Mesh

scholarly journals Control of Blueberry Maggot on Blueberries, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 62-62
Author(s):  
S. Polavarapu ◽  
D. F. Polk
Keyword(s):  
Fruit Pulp ◽  
Spray Solution ◽  
Full Production ◽  
Screen Mesh

Abstract This study was conducted in a ‘Bluecrop’ blueberry field in full production, near Whitesbog, NJ. Blueberry bushes were approximately 5 ft tall and spaced 9 X 4 ft apart. Treatments were applied to 108 ft X 275 ft plots with a Rears 50 gal airblast sprayer at 140 psi, calibrated to deliver 60 gal of spray solution per acre. There was a single replication of each treatment. Four unsprayed rows (36 ft) along the length (108 ft) and 12 unsprayed bushes (48 ft) along the width (275 ft) served as buffers between treatments. Insecticides were applied once on 3 Jul, 14 days after the first BBM fly capture in Pherocon AM traps. Samples of ripe blueberries were harvested on 14 Jul from each of the 12 rows in each treatment (12 samples/treatment). Berries were collected from the top, middle, and bottom third of each bush in a row. From each sample, a 1 -pt sub-sample was cooked and the fruit pulp filtered through a screen mesh and thoroughly checked for BBM larvae.

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