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Journal : MEKTEK

ANALISIS RELASI PARAMETER PEMOTONGAN BAJA St 43 PADA MESIN BUBUT GDW LZ 350 Selleng, Kristian
MEKTEK Vol 12, No 1 (2010)
Publisher : MEKTEK

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Abstract

The aim of this research is to find out the correlations among cutting parameters, namely depth of cutting t(mm), cutting speed v (mm/min) and feeding s (mm/rev) of a steel St 43 on. Type of the lathe is GDW LZ 350.This research used experiment method.Data analysis results the below equation: t = (2,483 − 0,3936 ln V + 5,44 V − 0,863 V ln V ) e S
EFEK RASIO TEKANAN KOMPRESOR TERHADAP UNJUK KERJA SISTEM REFRIGERASI R 141B Selleng, Kristian
MEKTEK Vol 9, No 1 (2007)
Publisher : MEKTEK

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Abstract

The purpose of this research is to find the effect of compressor pressure ratio with respect to performance of refrigeration system that is used refrigerant R 141B with water cooling on evaporator and condensor. The performance of refrigeration system is represented by heat transfer on evaporator and condensor.This research used experiment method. The result of this research indicates that is no effect of compressor pressure ratio to heat transfer on evaporator, on the contrary there is increasing compressor pressure ratio due to decreasing of heat transfer on condensor
EFEKTIFITAS KOLEKTOR ENERGI SURYA PADA KONFIGURASI PARALEL SERPENTINE W, Danny Syamsu; Selleng, Kristian; Mustofa, Mustofa
MEKTEK Vol 14, No 1 (2012)
Publisher : MEKTEK

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Abstract

This study aims to demonstrate the effectiveness of the collector on the fluid mass flow rate variations in sunlight collectors on the configuration of the combined 'parallel-serpentine'. Value of the mass flow rate is 0.09, 0.18 and 0.36 ltr/min. Fluid drained from the reservoir of cold water through the collector pipe and into the parallel configuration serpentine configuration and then stored in the hot water tank. The test results showed that the efficiency of a mass flow rate achieved at the optimum 0.36 liter / min. This result is probably leading to suitable for domestic purposes.