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All Journal Journal of Energy, Mechanical, Material and Manufacturing Engineering DIMENSI: Journal of Architecture and Built Environment
Samuel Hartono
Faculty of Civil Engineering and Planning, Petra Christian University
Civil Engineering, Building, Construction & Architecture Mechanical Engineering

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Influence of Horizontal Pipe Length to Flooding of Counter Current of Water-Air Flow in Complex Pipe Hartono, Samuel; Deendarlianto, Deendarlianto
Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 2, No 2 (2017)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (445.691 KB) | DOI: 10.22219/jemmme.v2i2.5029

Abstract

This research has been conducted study the effect of horizontal pipe length on flooding phenomenon. Observation of the flow phenomenon has used high speed camera. Working fluids for this study were water-air and the water flow was countercurrent to the air through a hot leg simulator. Hot leg simulator consisted of an acrylic horizontal pipe with inside diameter of 25.4 mm and an elbow with inclination angle of 500. The ratio of length to diameter pipe used in this study L/D = 25, L/D = 50 and L/D = 94.5. Water superficial velocity (JL) were 0.016 m/s, 0.049 m/s, 0.082 m/s. For each water superficial velocity, air superficial velocity (JG) was increased gradually with 0.1646 m/s from 0 m/s until flooding phenomenon appeared. Time interval to change air superficial velocity was 15 seconds. The result of this study was flooding phenomenon appeared earlier for higher L/D, and it was observed that the onset of flooding shifted toward the bend. It was also observed that flooding phenomenon shifted away from the bend for higher JL while L/D kept constant.
THE INFLUENCE OF VEGETATION TO INDOOR ILLUMINANCE, AIR TEMPERATURE AND RELATIVE HUMIDITY IN DESIGN STUDIO (Case Study: Architecture Department, Petra Christian University, Surabaya) Widigdo, Wanda K.; Hartono, Samuel; Kristanto, Luciana; Mintorogo, Danny Santoso
Dimensi: Journal of Architecture and Built Environment Vol. 46 No. 2 (2019): DECEMBER 2019
Publisher : Institute of Research and Community Outreach, Petra Christian University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (545.715 KB) | DOI: 10.9744/dimensi.46.2.161-168

Abstract

This research aimed to find the influence of vegetation outside the window to indoor light and thermal in Design studio, Architecture department of Petra Christian University, Surabaya. The vegetation was Shibataea kumasasa, cultivated in planter boxes, 90-100 centimeter high. The data was collected from the West and North window, for condition with and without vegetation outside the window. The measurement was taken on March until May 2019, using Hobo U12-012 data logger for measuring air temperature (°C), relative humidity (%) and illuminance (lux). Beside those physical measurement, the perception of 89 students as building user was also taken. The measurement result from windows facing West and North with the vegetation, the lowest indoor air temperature was 27°C with an average relative humidity of 70%. Meant it's at the upper edge of the comfort zoneof Bioclimatic Chart from Olgyay and Canada’s National Occupational Health & Safety Resource (CCOHS), so the indoor space was still uncomfortable and cooling was required to get into the comfort zone at warm humid climate. Result from lighting measurements obtained for west-oriented windows with vegetation outside the window, the highest illuminance was 350 lux at 02:45 pm, as well as for windows facing North at 07.30 am - 04.45 pm in range of 105 - 155 lux (highest). So, if there are vegetation outside windows, it will require electric lighting addition, because the illuminance are below the SNI 03-6197-2011which recommends 750 lux for design studio. Whilst the user respond from the questionnaire taken, stated that aesthetic vegetation was expected for natural element, blocked the penetration of solar radiation into indoor, and reduce glare to increase visual comfort without reducing luminous sufficiency for the visual activities in the design studio.
Co-Authors Danny Santoso Mintorogo Deendarlianto Handinoto Handinoto Luciana Kristanto Widigdo, Wanda K.