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Numerical investigation of heat ventilation on the traditional house attic of Buginese in a hot and humid tropical climate was carried out using computational fluid dynamics models. The Navier-Stokes (RANS) modeling approach is used for numerical investigations. Determined the breakdown of steady-state conditions by using SolidWorks Flow Simulation software. Based on various flow simulations, numerical results obtained for temperature distribution, airflow patterns, indoor turbulence characteristics, Dynamic pressure, Density, and Turbulent Viscosity are presented. Using numerical results, it is known that the stack effect lowers the Attic temperature by increasing the airflow in it.

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Chicken feathers are the result of waste from slaughterhouses and billions ofkilograms of waste produced by various kinds of poultry processing. This hal is a veryserious problem for the environment because it causes the impact of pollution. Hasmany utilization of chicken feather waste such as making komocen, accessories,upholstery materials, making brackets to the manufacture of animal feed but from theresults of this activity cannot reduce the production of chicken feathers that hiscontinuously increase every year. This is due to the fact that the selling price of chickenmeat has been reached by consumers with middle to upper economic levels. This caneasily be a chicken menu in almost all restaurants and restaurants to the food stalls onthe side of the road. An alternative way of utilizing chicken feathers is to makecomposite materials in the form of panels. Recent studies have shown that the pvacmaterial can be utilized as a mixing and adhesive material with mashed or groundfeathered composites to form a panel that can later be used as an acoustic material.The test results show that the absorption of chicken feathers and pvac glue into panelscan absorb sound well with an absorption coefficient of 0.59, light. This result is veryeconomical so it is worth to be recommended as an acoustic material. Apart from theresults of research methods carried out is one of the environmentally friendly activitiesin particular the handling of waste problems

The hyperbolic parabolic facade is the appearance of a Phinisi Tower Building. The building facade characterizes this building and is also the aesthetic value of this building. Building facade models are increasingly developing, but need to pay attention to their association with visual for space users. Visual comfort is related to the standardization of the level of illuminance, which has been recommended by Indonesia National Standards. Quantitative research methods that used describe data measurement results in the workspace, which are directly related to the opening of the building envelope. The level of illuminance measurements are carried out in the workspace and in open areas in medium sky conditions. The results of the study are that the level of illuminance in the workspace is very different, because of the different facade models. vertical and horizontal strip facade models have a higher level of illuminance than the hyperbolic parabolic facade, whereas in spaces that do not use a facade but shaded by sunscreen are the highest. The results of the study concluded the building facade model influence of the level of illuminance in the workspace. The contribution of this research can be a guide in designing the facade shape of buildings, by paying attention to the distribution of lighting into the space, so that it can reduce the use of energy in terms of lighting and can create energy efficient building designs.

Distribusi pencahayaan alami pada bangunan gedung perlu mendapat perhatian khusus, oleh karena pemanfaatan pencahayaan alami dapat mengurangi penggunaan energi sebagai sumber pencahayaan buatan. Namun perlu mempertimbangkan efek negative seperti terjadinya kesilauan (glare), tingkat kecemerlangan yang tinggi (brightness) dan efek penghawaan (thermal). Analisis distribusi pencahayaan alami dapat dilakukan dengan menggunakan Software Ecotech program untuk mengetahui tingkat iluminasi dalam ruangan.Metode penelitian kuantitatif dengan menggunakan program Autodesk Echotech untuk mengetahui nilai iluminasi pada sejumlah titik ukur dan analisis deskriptif statistik hasil simulasi. Hasil penelitian menunjukkan bahwa tingkat iluminasi pada langit perencanaan berpengaruh terhadap intensitas cahaya di dalam ruangan, semakin tinggi nilai iluminasi di luar ruangan maka distribusi cahaya alami akan semakin meningkat. Semakin tinggi bangunan gedung, maka nilai distribusi cahaya alami semakin meningkat. Selanjutnya distribusi cahaya alami berpengaruh terhadap orientasi bangunan pada waktu pagi, siang dan sore hari. Konstribusi penelitian ini adalah sebagai panduan dalam merancang bangunan berlantai banyak.

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