Daylight performance of horizontal light pipe with egg-crate reflector in the tropics

Horizontal Light Pipe (HLP) is one of a light transport system that can guide daylight deeper into building interiors. Improvement of HLP�s light distribution by installing an egg-crate reflector at its opening distribution was conducted. The study�s aim was to evaluate and explain the daylight performance of HLP with an egg-crate reflector at office space in the tropics. Experiment with physical scaled model 1:5 was used as a research method. Illuminance value, Daylight Factor (DF), uniformity ratio and diversity of illuminance of an office space lit by side window (base case) were compared to the office space lit by side window and HLP with an egg-crate reflector (case), simultaneously with daylighting standards. The results showed that HLP with egg-crate reflector improved daylight level and distribution. Improvement of DF and illuminance level were in the range of 16.6 % to 56.6 %. The uniformity ratio of the base case was in the range of 0.35 to 0.45, while in the case was in the range of 0.48 to 0.66. The diversity of illuminance of the base case at a low altitude of the sun (15:00) exceeded 5:1 while in the case was kept lower than 5:1 at all the measurement time

Effect of Tilt Angle of Building-Integrated Wind Turbine and Photovoltaic Façade on Wind Pressure and Solar Radiation

This study investigated the potential impacts of wind pressure and incident solar radiation on a building tilted façade installed with micro wind turbine and photovoltaic panels as a second skin façade for generating electricity. The wind pressure will affect wind turbine rotation, and solar radiation will affect the energy produced by the photovoltaic. The study used simulation modeling software to analyze the wind pressure and solar radiation received on the tilted façade. The research found that the force received by the tilted façade is more significant than that received by the 90° tilted façade. The smaller the tilted-angle of the façade, the more radiation received by the PV panel. Conversely, the larger tilted-angle of the building façade, the less radiation received by the photovoltaic, despite the wind pressure received by the wind turbine being higher than that received by the 90° tilt façade. However, the more radiation received by the façade, the more heat received by the building

Daylight performance of courtyard wall design at low-cost flat in the tropics

Courtyard in a low-cost flat in the tropics provides daylight but it is usually protected with a corridor to control the solar radiation. Surrounded by a shaded corridor, daylight level of the adjacent dwelling rooms around the courtyard are reduced. Modification of courtyard wall by integrating a sloped light shelf is proposed to improve the daylight level on dwelling room and control excessive light penetration at the corridor. Experiment with simulation as a tool was used as a research method. Illuminance value, Daylight Factor and uniformity ratio of the base case, a courtyard wall design in a typical low-cost flat in Surabaya (latitude 7�15�55��S) using louver and case, a proposed courtyard wall design using sloped light shelf were compared, simultaneously with daylighting standards. The results demonstrated that courtyard wall modification reduced excessive average illuminance on the corridor in the range of 41% to 57.1% and improved average illuminance in dwelling room in the range of 0.9% to 19.2%. The proposed courtyard wall also increased illuminance uniformity ratio in both corridor and dwelling room. In order to improve daylight quantity and quality, a courtyard wall with sloped light shelf can be applied on a low-cost flat in the tropics

THE EFFECT OF OPENING DISTRIBUTION AREA MODIFICATION ON HORIZONTAL LIGHT PIPE DAYLIGHT PERFORMANCE

The use of daylight within an office building in the tropics provides energy savings, psychological and physiological health advantages for building occupants. In order to promote the daylight admission, the building should have a narrow depth. However, plans of modern air-conditioned buildings tend to be deep, in order to minimize heat gain from the building envelope. A deep plan office building design limits access to daylight and generates an insufficient daylight level on the workspace distant from the side window. Horizontal Light Pipe (HLP) is one of light transport systems that can deliver daylight to these areas. The research aim was to explain and evaluate the effect of HLP�s opening distribution area on daylight performance at deep plan-private office space in the tropics. The research method was experiment with simulation as a tool. Daylight level and daylight uniformity of the base case, HLP with an opening distribution area of 6.6 m2 were compared with the case, HLP with an opening distribution area of 3.41 m2. The results showed that HLP with a smaller opening distribution area of 3.41 m2 could illuminate working spaces where a simple visual task is performed. A 50% reduction of HLP�s opening distribution area, from 6.6 m2 to 3.41 m2 improved average Daylight Factor (DF) as much as 6.42%. The presence of highly specular material on opening distribution area contributed to the specular reflection of daylight before being transmitted to office space by a translucent glass. A lower illuminance uniformity ratio but still meet the recommended illuminance uniformity ratio on workspace was resulted in a smaller HLP�s opening distribution area. Considering the improvement of daylight level and high uniformity ratio resulted, HLP with a smaller opening distribution area can be applied as the main source of daylight on deep-plan office spaces

DAYLIGHTING PERFORMANCE OF HORIZONTAL LIGHT PIPE BRANCHING ON OPEN PLAN OFFICE SPACE

For daylighting purpose, office buildings should have a shallow plan and increase the ratio of surface to building’s volume. However, intensive use of air-conditioning drives office building’s plan to be deep with a minimum surface to volume ratio. This leads to the presence of areas that have insufficient daylight level at the work plane. Considering limitations of some daylighting methods in distributing daylight to these areas, Horizontal Light Pipe (HLP) was selected. The aim of this research was to evaluate and explain the effect of HLP branching on daylight quantity and distribution inside open plan office space. Experimental with simulation as a tool was used as the research method. HLP branching’s uniformity ratio, illuminance and Daylight Factor were compared with unbranching HLP, simultaneously with daylighting standards. Results showed that office space with HLP-L branching had higher daylight level than HLP-T branching, 296 lux and 295 lux, HLP-L and HLP-T, respectively. However, HLP-T branching distributed daylight more evenly than HLP-L branching, with uniformity ratio as 1.49:1 and 1.50:1, HLP-T and HLP-L, respectively. Both of them met the illuminance target value and uniformity at work plane. Light’s deflection and improvement amount of opening distribution decreased average illuminance and Daylight Factor up to 3.59%. Those also decreased uniformity of daylight inside the space

MODULAR FASADE GANDA SARANG LEBAH DENGAN KINCIR ANGIN

Invensi ini berhubungan dengan modular segi enam kincir angin mikro dan pipa pemantul cahaya matahari pada fasade ganda. Secara khusus invensi fasade ganda ini terdiri dari banyak kincir angin mikro dan deretan pemantul cahaya matahari. Kincir angin mikro ini ditempatkan di setiap modular segi enam fasade ganda dan menghasilkan listrik sebagai energi terbarukan dengan mekanisme pembangkit listrik magnetik yang berputar pada poros secara vertikal; dari perputaran gesekan magnetik diperoleh tenaga listrik magnetic arus searah

THE INFLUENCE OF WALL COLOR AND LAMP COLOR TEMPERATURE TO STUDENT’S CONCENTRATION AND COGNITION

Concentration has an important role in our life, especially in order to get a quality and productivity in working. With concentration we can achieve the maximum and faster result in our work. Some ways to improve concentration that being researched here is by arranging the wall color and the lamp color temperature of the room. The color used as wall color in this research was the blue 9.8B, 7.4/5.6; and the orange 8.1YR, 8.7/3.7 of the Munsell color palette. Whereas the room lighting was the fluorescent lamp in 6500K (cool daylight) and 2700K (warm white) color temperature. Respondents of this research were 117 undergraduate students, the average GPA was 3.28; and 20,26 years as the mean age. The concentration and cognition tests are the Army Alfa test and IST subtest 9 that conducted in the room with different condition. Found in this research that the blue with cool daylight lamp has significant impact to concentration in 2,526 Lickert scale; and that orange with cool daylight lamp has correlation 0.781 to cognition result; but the other conditions have no significancy toward concentration and cognitio

HOSPITAL’S WALL COLOUR IMPACT ON STROKE PATIENTS’ WARD USERS IN SURABAYA

The Cardiovascular diseases have become the top killer since 1970 worldwide. In 2005, it was recorded the present of 5.7 million stroke survivors. On the other hand, healing stroke and its related complications required much more considerable time. So the patients’ wards quality especially related to wall colour become very important for the patients recovery. The study was conducted with exploratory methods combining visual methods of research and Luscher colour test. Series of interviews were conducted to gather the users’ perception. So, it was found on that blue wall colour calmed the medical personals, patients, and their family. The most soothing Blue colour variant according to respondents was the Artic Blue (hue 9.8 B, value 7.4 and chroma 5.6)

Fasilitas media cetak di Surabaya

Fasilitas Media Cetak di Surabaya ini merupakan proyek milik yayasan swasta yang bergerak di bidang media cetak. Fasilitas yang direncanakan meliputi kantor sewa, percetakan, ruang pamer temporer, ruang pamer permanen, perpustakaan, ruang organisasi pers, ruang konferensi pers, ruang multimedia, dan kafetaria. Sesuai dengan karakter jurnalis media cetak yakni karakter persaingan dan kerjasama, maka konsep perancangannya mengacu pada Dualisme antara persaingan dan kerjasama. Oleh karena itu, terdapat perbedaan dalam perancangan bangunan yang berkarakter persaingan dan bangunan yang berkarakter kerjasama. Perbedaan itu diwujudkan dalam beberapa elemen disain, seperti bentuk bangunan, zoning massa bangunan, akses, pencapaian, tampilan eksterior, tampilan interior, penataan perabot

Collaboration of two Optical Daylighting Systems at Office Building in The Tropics

Intensive use of air conditioning encourages building’s plan to be deep with a minimum surface to volume ratio. Modern air conditioned office building in the tropics are also applied external shading on windows or highly reflective glazing to minimize radiant heat gain. Those lead to the presence of areas that have insufficient daylight level at the work plane. Horizontal Light Pipe (HLP) is one of optical daylighting system that can guide daylight to these areas. Considering that distributing daylight evenly throughout room is important besides providing sufficient daylight level, a shading system, Reflective Louvre (RL) is applied. RL plays role in reducing daylight level at areas near to window and improving daylight uniformity inside room. The research’s aim is to evaluate and explain daylight quantity and distribution of HLP and RL at office space in the tropics. Experiment with physical model 1:10 was used as the research method. Illuminance was measured using HOBO U12/12 data logger, on a real sky condition. Comparison of illuminance, daylight ratio and uniformity ratio resulted by Base Case and HLP&RL Case, a typical office building with sidelighting and an office building with HLP and RL application sequentially, simultaneously with daylighting standards were conducted. Results showed that office room with HLP and RL application had a higher average illuminance and daylight ratio than Base Case. HLP and RL introduced consistently average illuminance between 400-900 lux, improved illuminance level at deep area of room as 160-290% and decreased illuminance level at area close to window as 8-60%. This combination created high uniformity ratio inside room, as high as 0.33-0.71. At most time, those illuminance value and uniformity ratio had fulfilled office’s daylighting standards