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Richa Syahwalia
Modifikasi bitumen dengan penambahan high density polyethylene hdpe atau polypropylene pp dengan metode hot melt mixing = Modification of bitumen by high density polyethylene hdpe or polypropylene pp with hot melt mixing
"[ ABSTRAK
Bitumen merupakan bahan penyusun aspal serta memiliki fungsi sebagai binder pada aspal. Sifat dari bitumen mempengaruhi kinerja dari aspal. Aspal merupakan material yang biasanya digunakan untuk infrastruktur seperti aplikasi pada jalanan. Aspal merupakan material yang relatif murah namun aspal memiliki beberapa kelemahan karena sifat material penyusunya dan kondisi lingkungan sehingga dibutuhkan langkah untuk menangani kelemahan pada aspal tersebut. Salah satu metode yang dapat dilakukan untuk menangani masalah tersebut adalah melakukan pencampuran bitumen (bahan pengikat pada aspal) dengan limbah plastik kresek (high density polyehtylene atau polypropylene) untuk membentuk suatu komposit Polymer Modified Bitumen (PMB) sehingga perfoma dari aspal dapat meningkat dan membuat limbah plastik lebih berguna kembali. Percobaan ini mengunakan 2 buah jenis plastik kresek dan 3 buah variabel berbeda yaitu konsentrasi plastik kresek, waktu, dan temperatur pencampuran. Plastik kresek yang digunakan adalah HDPE dan PP. Konsentrasi High Density Polyethyelene (HDPE) yang digunakan adalah 4%, 5%, dan 6%, konsentrasi Polypropylene (PP) yang digunakan adalah 3%, 4%, dan 5%, waktu pencampuran yang digunakan adalah 15, 30, dan 45 menit, dan juga temperatur pencampuran yang digunakan adalah 140oC sampai dengan 200oC. Metode pencampuran basah digunakan untuk mencampurkan kedua material tersebut. Hasil atau kualitas komposit diketahui dengan melakukan investigasi melalui pengujian penetrasi, daktilitas, titik lembek, Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), Thermo Gravimetric Analyzer (TGA), dan Differential Scaning Calorimetry (DSC). Hasil penelitian mengenai PMB menyimpulkan bahwa kompatibiltas antara plastik kresek baik HDPE dan PP kurang baik terhadap bitumen namun penambahaan plastik kresek terhadap bitumen meningkatkan sifat mekanik dan kestabilan termal bitumen.
ABSTRACT Bitumen is a binder and one of constituents of asphalt so the characteristic of bitumen affects asphalt perfomance. Asphalt is a material that usually used in road application. However, there are also drawbacks of asphalt as material on pathway because of its constituents and environment condition. For the examples, asphalt is brittle in low temperature and will be soften when temperature increase so the action is needed to address this problems. One solution to solve these problems by adding wasted plastic bags made by High Density Polyethylene (HDPE) or Polypropylene (PP) to bitumen so it can increase asphalt efficiency and make wasted plastic bag more useful. This experiment used two type of plastic bags and three variables (concentration of plastic bags, mixing time, and mixing temperature). HDPE concentrations used were 4%, 5%, and 6%, PP concentrations used were 3%, 4%, and 5%, mixing times used were 15, 30, and 45 minutes, and also mixing temperatures were 140oC up to 200oC. Hot melt mixing method was used to mix those material. The quality of mixing material (composite) was tested by some instruments like ductility tester, softening point tester, penetration testing, Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), Thermo Gravimetric Analyzer (TGA) and Differential Scaning Calorimetry (DSC). The result is compatibilty of HDPE or PP to bitumen is not that enough, however, modification of bitumen by plastic bags increases mechanical properties and thermal resistance of bitumen.;Bitumen is a binder and one of constituents of asphalt so the characteristic of bitumen affects asphalt perfomance. Asphalt is a material that usually used in road application. However, there are also drawbacks of asphalt as material on pathway because of its constituents and environment condition. For the examples, asphalt is brittle in low temperature and will be soften when temperature increase so the action is needed to address this problems. One solution to solve these problems by adding wasted plastic bags made by High Density Polyethylene (HDPE) or Polypropylene (PP) to bitumen so it can increase asphalt efficiency and make wasted plastic bag more useful. This experiment used two type of plastic bags and three variables (concentration of plastic bags, mixing time, and mixing temperature). HDPE concentrations used were 4%, 5%, and 6%, PP concentrations used were 3%, 4%, and 5%, mixing times used were 15, 30, and 45 minutes, and also mixing temperatures were 140oC up to 200oC. Hot melt mixing method was used to mix those material. The quality of mixing material (composite) was tested by some instruments like ductility tester, softening point tester, penetration testing, Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), Thermo Gravimetric Analyzer (TGA) and Differential Scaning Calorimetry (DSC). The result is compatibilty of HDPE or PP to bitumen is not that enough, however, modification of bitumen by plastic bags increases mechanical properties and thermal resistance of bitumen.;Bitumen is a binder and one of constituents of asphalt so the characteristic of bitumen affects asphalt perfomance. Asphalt is a material that usually used in road application. However, there are also drawbacks of asphalt as material on pathway because of its constituents and environment condition. For the examples, asphalt is brittle in low temperature and will be soften when temperature increase so the action is needed to address this problems. One solution to solve these problems by adding wasted plastic bags made by High Density Polyethylene (HDPE) or Polypropylene (PP) to bitumen so it can increase asphalt efficiency and make wasted plastic bag more useful. This experiment used two type of plastic bags and three variables (concentration of plastic bags, mixing time, and mixing temperature). HDPE concentrations used were 4%, 5%, and 6%, PP concentrations used were 3%, 4%, and 5%, mixing times used were 15, 30, and 45 minutes, and also mixing temperatures were 140oC up to 200oC. Hot melt mixing method was used to mix those material. The quality of mixing material (composite) was tested by some instruments like ductility tester, softening point tester, penetration testing, Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), Thermo Gravimetric Analyzer (TGA) and Differential Scaning Calorimetry (DSC). The result is compatibilty of HDPE or PP to bitumen is not that enough, however, modification of bitumen by plastic bags increases mechanical properties and thermal resistance of bitumen.;Bitumen is a binder and one of constituents of asphalt so the characteristic of bitumen affects asphalt perfomance. Asphalt is a material that usually used in road application. However, there are also drawbacks of asphalt as material on pathway because of its constituents and environment condition. For the examples, asphalt is brittle in low temperature and will be soften when temperature increase so the action is needed to address this problems. One solution to solve these problems by adding wasted plastic bags made by High Density Polyethylene (HDPE) or Polypropylene (PP) to bitumen so it can increase asphalt efficiency and make wasted plastic bag more useful. This experiment used two type of plastic bags and three variables (concentration of plastic bags, mixing time, and mixing temperature). HDPE concentrations used were 4%, 5%, and 6%, PP concentrations used were 3%, 4%, and 5%, mixing times used were 15, 30, and 45 minutes, and also mixing temperatures were 140oC up to 200oC. Hot melt mixing method was used to mix those material. The quality of mixing material (composite) was tested by some instruments like ductility tester, softening point tester, penetration testing, Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), Thermo Gravimetric Analyzer (TGA) and Differential Scaning Calorimetry (DSC). The result is compatibilty of HDPE or PP to bitumen is not that enough, however, modification of bitumen by plastic bags increases mechanical properties and thermal resistance of bitumen., Bitumen is a binder and one of constituents of asphalt so the characteristic of bitumen affects asphalt perfomance. Asphalt is a material that usually used in road application. However, there are also drawbacks of asphalt as material on pathway because of its constituents and environment condition. For the examples, asphalt is brittle in low temperature and will be soften when temperature increase so the action is needed to address this problems. One solution to solve these problems by adding wasted plastic bags made by High Density Polyethylene (HDPE) or Polypropylene (PP) to bitumen so it can increase asphalt efficiency and make wasted plastic bag more useful. This experiment used two type of plastic bags and three variables (concentration of plastic bags, mixing time, and mixing temperature). HDPE concentrations used were 4%, 5%, and 6%, PP concentrations used were 3%, 4%, and 5%, mixing times used were 15, 30, and 45 minutes, and also mixing temperatures were 140oC up to 200oC. Hot melt mixing method was used to mix those material. The quality of mixing material (composite) was tested by some instruments like ductility tester, softening point tester, penetration testing, Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), Thermo Gravimetric Analyzer (TGA) and Differential Scaning Calorimetry (DSC). The result is compatibilty of HDPE or PP to bitumen is not that enough, however, modification of bitumen by plastic bags increases mechanical properties and thermal resistance of bitumen.]"
Depok: Fakultas Teknik Universitas Indonesia, 2016
S62223
UI - Skripsi Membership  Universitas Indonesia Library
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Yermia Andri Prawira
Modifikasi bitumen dengan penambahan high density polyethylene (HDPE) dan polypropylene serta lignin melalui metode hot melt mixing = Modified bitumen with addition of high density polyethylene (HDPE) and polypropylene and lignin through hot melt mixing method
"Penelitian ini bertujuan mencari solusi permasalahan seperti kerusakan aspal, pencemaran lingkungan oleh limbah plastik dan lignin. Melalui studi literatur, ditemukan plastik dapat menguatkan sifat aspal yang lemah terhadap air. Namun, aspal dan plastik tidak kompatibel karena sifat aspal yang hidrofilik dan sifat plastik yang hidropobik. Oleh karena itu, lignin yang mempunyai kedua sifat tersebut digunakan sebagai coupling agent. Bitumen pen 60/70 dimodifikasi dengan menambahkan plastik Polipropilena PP dan High Density Polyethylene HDPE lalu dicampur melalui metode Hot Melt Mixing. Variabel tetapnya ialah waktu, temperatur proses, dan putaran alat pengaduk yaitu 30 menit, 180oC, dan 60 rpm. Variabel bebasnya ialah komposisi campuran PP yaitu 3wt, 4wt, 5wt, HDPE yaitu 5wt, 6wt, 7wt dan lignin. Putaran pertama proses sampel tidak ditambahkan lignin, putaran kedua sampel ditambahkan lignin 0,3wt. Setelah itu, hasil proses campuran yang disebut Polymer Modified Bitumen PMB, dikarakterisasi. Karaterisasi sifat kimia campuran menggunakan Fourier Transform Infrared FTIR, Thermo Gravimetric Analyzer TGA, dan Differential Scanning Calorimetry DSC dan karakterisasi mekanik sifat penetrasi, daktilitas, dan titik lembek. Hasil pengujian menunjukkan Polyblend PP/HDPE menambah sifat mekanik bitumen, lignin meningkatkan kompatibilitas antara bitumen dan plastik, serta diperlukan coupling agent tambahan untuk menyatukan antar plastik PP dan HDPE yang viskositasnya berbeda.
This study aims to find solutions to problems such as damage to the asphalt, pollution of environment by plastic waste and lignin. Through literature, discovered the plastic can strengthen the weak nature of the asphalt to water. However, asphalt and plastics are not compatible because of the nature of the asphalt hydrophilic and hydrophobic properties of the plastic. Therefore, lignin which has both these properties is used as a coupling agent. 60 70 bitumen modified by adding plastic Polypropylene PP and High Density Polyethylene HDPE and then mixed with Hot Melt Mixing method. Fixed variable is time, process temperature, and mixer rotation which are 30 minutes, 180 C, and 60 rpm. The independent variables are the composition of the mixture of PP i.e. 3wt, 4wt, 5wt, HDPE i.e. 5wt, 6wt, 7wt and lignin. The first round of the sample is not added lignin, the second round of sample was added lignin 0,3wt. After that, the process results, a mixture called Polymer Modified Bitumen PMB, characterized. Chemical properties characterization of the mixture using a Fourier Transform Infrared FTIR, Thermo Gravimetric Analyzer TGA, and Differential Scanning Calorimetry DSC and the characterization of the mechanical properties of penetration, ductility, and the softening point. The test results showed polyblend PP HDPE adds to the mechanical properties of bitumen, lignin improve the compatibility between bitumen and plastic, as well as additional coupling agent is required to bring together between PP and HDPE plastic which different viscosity."
Depok: Fakultas Teknik Universitas Indonesia, 2016
S65605
UI - Skripsi Membership  Universitas Indonesia Library
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Bernhard Eko Hendrasetyawan
Limbah lignin sebagai coupling agent untuk modifikasi bitumen dan limbah polipropilena dengan metode hot melt mixing = Lignin waste as a coupling agent for modified bitumen and polypropylene waste with hot melt mixing method
"Kebutuhan bitumen sebagai bahan baku pembuatan jalan sangat tinggi, limbah kantong plastik dan limbah kertas lignin yang belum dimanfaatkan adalah latar belakang penelitian ini. Tujuan penelitian ini adalah melihat kemampuan limbah lignin sebagai coupling agent antara bitumen dan limbah kantong plastik polipropilena. Metode yang digunakan untuk mencampurkan material ini adalah hot melt mixing. Variabel bebas yang digunakan adalah komposisi lignin 0%, 0,1%, 0,3%, dan 0,5%; temperatur proses 160°C, 180°C, dan 200°C; dan waktu proses 15, 30, dan 45 menit. Karakteristik yang dilakukan adalah FE-SEM, FT-IR, STA, pengujian penetrasi, pengujian daktilitas, dan pengujian titik lembek. Dari hasil pengujian menunjukan bahwa lignin berpengaruh sebagai coupling agent.
Bitumen as raw material of road, untapped waste plastic bags and waste paper lignin is the background of this research. The purpose of this study is to see the ability of waste lignin as a coupling agent between bitumen and waste plastic bags polypropylene. The method used to mix all the materials is hot melt mixing. The independent variable used was the composition of lignin 0%, 0.1%, 0.3% and 0.5%; temperature of the process 160°C, 180°C and 200°C; and processing time of 15, 30 and 45 minutes. To view the properties FE-SEM, FT-IR, STA, penetration test, ductility test, and soft point test. The test results show that lignin has an effect as a coupling agent."
Depok: Fakultas Teknik Universitas Indonesia, 2016
S62968
UI - Skripsi Membership  Universitas Indonesia Library
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Muhammad Fachrur Rozi
Pengaruh udara panas terhadap laju pengeringan pada freeze vacuum drying = The effect of hot air drying rate against the freeze vacuum drying
"Pengeringan beku vakum merupakan metode pengeringan yang terbaik, tetapi tidak hemat energi karena proses pengeringan yang relatif lama. Skripsi ini membahas mengenai efek penambahan udara panas sebagai usaha untuk mempercepat laju pengeringan material dari sistem refrijerasi dengan vacuum freezing pada proses penurunan tekanan material uji pada pengeringan beku vakum. Hasil penelitian membuktikan bahwa pemanfaatan penambahan udara panas dapat mempercepat laju pengeringan. Selain itu dengan penambahan udara panas, dapat menghemat konsumsi energi listrik. Penambahan udara panas ini hemat biaya karena tidak ada perangkat tambahan pada sistem refrijerasi. Udara panas diambil dari udara lingkungan yang masuk ke dalam reservoir dengan temperatur 35°C yang dipanaskan dengan menggunakan panas buang kondenser.
Freeze Vacuum Drying is the best method of drying, but not energy efficient because of the relatively long drying process. This thesis discusses the effects of the addition of hot air in an effort to accelerate the rate of drying of the material with a vacuum refrijeration system freezing on the pressure drop of test material in a freeze vacuum drying. The research proves that the use of additional heat can accelerate the rate of drying. Additionally, with the addition of hot air, can save electricity consumption. The addition of hot air is cost effective because no additional devices on the refrijeration system. Hot air taken from ambient air into the reservoir with a temperature of 35oC is heated using waste heat condenser."
Depok: Fakultas Teknik Universitas Indonesia, 2012
S42320
UI - Skripsi Open  Universitas Indonesia Library
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Erwin Prawiro
Pengujian sifat sifat termal beeswax dengan penambahan nanopartikel cuo untuk aplikasi phase change material = Experiment of thermal properties of beeswax with addition of cuo nanoparticle for phase change material application
"Kebutuhan energi semakin meningkat dengan bertambahanya populasi manusia pada saat ini. Salah satu konsumsi energi terbesar adalah pada bidang industri khususnya pada gedung-gedung. Phase Change Material (PCM) merupaka salah satu solusi terhadap permasalahan kebutuhan energi ini. Beeswax merupakan salah satu PCM dengan kapasitas kalor yang tinggi. Material ini akan diuji dan dianalisis pada penelitian ini. Tujuan dari penelitian ini adalah untuk mengetahui sifat-sifat termal dari komposit beeswax dan nanopartikel CuO. Titik leleh dan kapasitas termal dari nano-PCM akan dianalisis dengan metodologi DSC (Different Scanning Calorymeter). Titik leleh dari nano-PCM menurun sebesar 0.6,0.63,0.66,1.07,1.41oC untuk 0.05,0.1,0.15,0.2,0.25 wt % secara berurutan. Tidak ada reaksi kimia diantara beeswax dan nanopartikel CuO berdasarkan hasil dari tes FTIR. Penambahan nanopartikel CuO akan meningkatkan kemampuan perpindahan kalor dari komposit, akan tetapi menurunkan kapasitas kalor dari komposit tersebut. Berdasarkan hasil yang telah didapatkan, penambahan nanopartikel akan meningkatkan kecepatan penghantaran kalor dibandingkan dengan material dasar.
The demand of energy is increased in recent days. Experimental and implementation of phase change material as thermal storage is gained greater attention as solution to energy issue. Beeswax as one of phase change material with high thermal capacity is investigated in this paper. The objective of this paper is to analyze thermal properties and behaviors of beeswax-CuO Nano-PCM. The melting temperature and thermal capacity of nano-PCMs were determined by differential scanning calorimetry test. The melting temperature of nano-PCM decreased by 0.6,0.63,0.66,1.07,1.41oC for 0.05,0.1,0.15,0.2,0.25 wt %,respectively. There was no chemical reaction between CuO and beeswax based on FTIR test. Existing of CuO nanoparticles enhanced thermal conductivity of beeswax. Addition of CuO nanoparticles reduced heat capacity of beeswax. However, the change of latent heat would not cause significant effect towards the performance of beeswax-CuO. Thus, based on result, heat transfer of composite beeswax-CuO could be faster than base phase change material."
Depok: Fakultas Teknik Universitas Indonesia, 2016
S61961
UI - Skripsi Membership  Universitas Indonesia Library
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Asyari
Modifikasi Bilangan Prandtl Kinetik Model Turbulen k- ε Untuk Peningkatan Ketelitian Hasil Simulasi Aliran Kompleks Pada Peralatan Fluidized Bed = The Modification of kinetic Prandtl number of k- ε Turbulence Model to Improve the Accuracy of Simulation Results of Complex Fluid Flows in Fluidized Bed
"

Telah dilakukan penelitian analisis aliran turbulen dengan menggunakan metode  CFD untuk aliran fluida kompleks pada fluidized bed dengan menggunakan beberapa model turbulen yaitu model turbulen standar (STD) k-ε, Re-normalization Group (RNG) k-ε, dan tiga model turbulen k-ε yang telah dimodifikasi. Fluidized bed adalah merupakan komponen pada sistem turbin mikro bioenergi untuk aplikasi zero energy building (ZEB). Tujuan dari simulasi ini adalah untuk memperoleh model turbulen baru yang memberikan hasil simulasi lebih baik, khususnya aliran fluida kompleks. Simulasi CFD dilakukan dengan perangkat lunak CFDSOF(r) menggunakan model geometri grid dua dimensi 100x200.

Dari hasil simulasi menggunakan 2 model turbulen, yaitu STD k-ε, RNG k-ε, kedua model turbulen tersebut ternyata memberikan hasil yang hampir sama dan mendekati hasil eksperimen untuk parameter beda tekanan pada bed. Namun model STD k-ε memberikan hasil yang lebih mendekati hasil eksperimen atau efektif pada kecepatan superficial 0,40 m/s – 0,80 m/s sementara model RNG k-ε lebih efektif pada kecepatan superficial 0,70 m/s – 1,0 m/s. Dari perbandingan terhadap parameter fisik, kedua model memberikan hasil yang hampir sama untuk parameter fraksi volume dan kecepatan partikel, namun memberikan hasil yang berbeda untuk tekanan statik dan kecepatan gas. Untuk parameter turbulensi, yaitu energi kinetik turbulen, laju disipasi turbulen dan viskositas efektif, kedua model memberikan hasil yang berbeda.

Untuk modifikasi nilai Prandtl kinetik pada model turbulen STD k-ε, dimana dilakukan simulasi dengan nilai Prandtl kinetik (Prandtl-k) 0,8; 0,9; dan 1,1; untuk parameter beda tekanan pada bed nilai Prandtl-k 0,9 memberikan hasil yang paling akurat untuk kecepatan superficial 0,40 – 0,70 m/s, sementara nilai 1,1 akurat untuk kecepatan superficial 0,80 – 0,90 m/s. Hasil simulasi untuk parameter laju disipasi menunjukkan bahwa perubahan nilai Prandtl-k merubah pola kontur laju disipasi. Untuk parameter viskositas efektif gas diperoleh hasil bahwa dengan turunnya nilai Prandtl-k menyebabkan turunnya nilai viskositas efektif gas dan sebaliknya. Sedangkan untuk parameter viskositas efektif partikel diperoleh hasil bahwa untuk nilai Prandtl-k = 0,9 hasilnya tidak berbeda secara signifikan dengan model standar pada kecepatan superficial 0,5 m/s. Berbeda dengan nilai Prandtl-k = 1.1 yang diuji pada kecepatan superficial 0,8 m/s, diperoleh hasil bahwa kenaikan bilangan Prandtl-k menjadi 1,1 menaikkan viskositas efektif partikel.

Turbulent flow analysis has been carried out using the CFD method for complex fluid flow in fluidized beds using several turbulent models, i.e. standard k-ε (STD), Re-normalization Group k-ε (RNG), and three modified k -ε turbulent models. Fluidized bed is a component of the bioenergy micro turbine system for zero energy building (ZEB) applications. The purpose of this simulation is to obtain a new turbulent model that provides better simulation results, especially for complex fluid flows. CFD simulation is done with CFDSOF (r) software using a 100 x 200 two-dimensional grid geometry model.

From the simulation results using 2 turbulent models, i.e. STD k-ε, RNG k-ε, the two turbulent models turned out to give almost the same results and approached the experimental results for the parameters of the pressure difference on the bed. However the STD k-ε model gives more accurate results at the superficial velocity of 0.40 m/s - 0.80 m/s and the RNG k-ε model is more accurate at superficial velocities of 0.70 m/s - 1.0 m/s. From the comparison of physical parameters, the two models give almost the same results for the volume fraction and particle velocity parameters, but give different results for static pressure and gas velocity. For turbulent parameters, i.e. turbulent kinetic energy, turbulent dissipation rate and effective viscosity, both models give different results.

The results of modification of the kinetic Prandtl value in the turbulent STD k-ε model, where the simulation is performed with a kinetic Prandtl value of 0.8; 0.9; and 1.1; for pressure difference parameters on bed, Prandtl-k = 0.9 gives the most accurate results for superficial velocities of 0.40 - 0.70 m/s, while Prandtl-k = 1.1 is accurate for superficial velocities of 0.80– 0.90 m/s. The simulation results for disipation rate show that the change of kinetic Prandtl change the disipation rate contour. Meanwhile, decreasing the value of kinetic Prandtl will decrease the effective viscosity of gas and vice versa. The contours of particle effective viscosity for Prandtl-k = 0.9 are not different significantly with the standard model measured at superficial velocity of 0.5 m/s. But the different results are found for the Prandtl-k = 1.1 measured at superficial velocity of 0,8 m/s, where the higher Prandtl-k value the higher the particle effective viscosity.

"
2019
D2655
UI - Disertasi Membership  Universitas Indonesia Library
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Ranu Octoro
Analisa perhitungan beban pendinginan dengan menggunakan metode CLTD dan visualisasi pencahayaan dengan piranti lunak dialux = Analyze of cooling load calculation using CLTD method and lighting visualization with dialux software
"Skripsi ini menganalisa tentang perhitungan cooling load dengan menggunakan metode CLTD. Gedung yang digunakan dalam perhitungan merupakan suatu kasus di suatu lokasi tertentu dan dipindahkan ke lokasi Jakarta serta telah memiliki data-data lengkap. Selain itu skripsi ini juga menjelaskan tentang proses simulasi software DIALux. Software ini dapat memvisualisasikan pencahayaan pada suatu ruangan.
Hasil analisa perhitungan menunjukan bahwa metode CLTD cukup baik untuk digunakan karena langkah-langkah dari metode tersebut sangat detail. Selain itu dari analisa didapatkan faktor-faktor yang sangat mempengaruhi naiknya cooling load diantaranya panas dari matahari, infiltrasi, dan pencahayaan serta didapatkan juga visualisasi pencahayaan pada suatu ruangan, sebagai hasil dari simulasi software DIALux.
This research analyzes on cooling load calculation using CLTD method. The building used in the calculation of a case in a particular location and moved to a location of Jakarta and has had complete data. In addition this paper also describes the simulation process DIALux software. This software can visualize the lighting in a room.
Analysis results showed that the method of calculation cltd good enough to be used as the steps of the method are very detailed. In addition, from the analysis found the factors that influence the increase cooling load include heat from the sun, infiltration, and lighting as well as lighting visualization is also available in a room, as a result of the simulation software DIALux."
Depok: Fakultas Teknik Universitas Indonesia, 2013
S46105
UI - Skripsi Membership  Universitas Indonesia Library
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Dias Pringgodani
Analisa perhitungan cooling load dengan menggunakan metode CLTD ashrae dan energyplus = Analysis of cooling load calculation using CLTD ashrae method and energyplus
"Perhitungan cooling load dari suatu ruangan yang akan dikondisikan udaranya merupakan tahapan yang diperlukan agar diperoleh tingkat kenyamanan yang diinginkan. Suatu ruangan memperoleh panas dari berbagai sumber. Panas yang diperoleh ruangan dapat berasal dari beban eksternal, beban internal, infiltrasi dan ventilasi. Untuk menjaga temperatur dan kelembaban udara ruangan pada keadaan yang nyaman maka panas harus dikeluarkan dari ruangan. Jumlah panas yang dikeluarkan tersebut dinamakan cooling load. Pada tugas akhir ini, reka simulasi dilakukan sebagai sebuah metode untuk mendapatkan cooling load, dengan bantuan sistem komputer yakni perangkat lunak EnergyPlus. Setelah mendapatkan hasil cooling load dari simulasi, penulis melakukan analisa perbandingan cooling load antara hasil cooling load yang didapat dari simulasi EnergyPlus dengan cooling load yang didapat dari hasil perhitungan berdasarkan metode CLTD (Cooling Load Temperature Difference).
Cooling load calculation of a room would be a necessary step in order to obtain the desired level of comfort zone. An indoor heat obtained from various sources. Indoor heat gain can come from external loads, internal loads, infiltration and ventilation. To keep the room air temperature and humidity at a comfortable zone, the heat must be removed from the room. The amount of heat released is called the cooling load. In this final task, simulations performed as a method to get the cooling load, with the help of the computer system software EnergyPlus. After getting the results of the simulation, the authors analyze the cooling load comparison between the results obtained from the cooling load by EnergyPlus obtained from the calculation based on the CLTD (Cooling Load Temperature Difference) method."
Depok: Fakultas Teknik Universitas Indonesia, 2013
S52519
UI - Skripsi Membership  Universitas Indonesia Library
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Ricky Ardiansyah
Pengujian metode pengukuran flowrate pada cold storage melalui parameter sinyal Discharge Pressure Compressor Dengan Variasi Beban Pendinginan = Experimental of measurement flowrate method In cold storage based on Discharge Pressure Signal of The Compressor with cooling load variations
"Flowrate merupakan parameter penting dalam sebuah sistem refrijerasi. Selama ini, pengukuran flowrate dianggap hal yang menyulitkan lantaran membutuhkan ketersediaan alat ukur. Oleh karena itu, berbagai alternatif pengukuran mulai dilakukan untuk mengatasi hal tersebut. Diantaranya adalah pengukuran flowrate melalui putaran motor pada kompresor torak. Dimana putaran tersebut dapat dibaca melalui sinyal tekanan keluaran kompresor yang kemudian diolah secara matematis untuk mendapatkan frekuensi dari putaran motor. Dalam hal ini, ada dua metode matematis yang digunakan untuk membaca frekuensi dari tekanan keluaran kompresor, yaitu Fast Fourier Transform (FFT) dan Chirp-Z Transform (CZT) dimana beban pendinginan divariasikan guna melihat pengaruhnya terhadap nilai flowrate yang didapat.
Flowrate is important value in a refrigeration system. During this time, flowrate measurement is considered difficult because it requires the availability of measuring instruments. Therefore, various alternative measurement begun to overcome it. Such as measuring flowrate based on the compressor speed in which it can be read by discharge pressure signal of the compressor and then it processed mathematically to obtain the frequency. In this case, there are two mathematical methods are used to find the frequency of the compressor speed, they are Fast Fourier Transform (FFT) and Chirp-Z Transform (CZT), where the cooling load was varied to see its effect on the flowrate that would be obtained."
Depok: Fakultas Teknik Universitas Indonesia, 2015
S61719
UI - Skripsi Membership  Universitas Indonesia Library
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Hamdani Pujiyanto
Pengujian metode pengukuran flowrate pada cold storage melalui parameter sinyal discharge pressure compressor dengan variasi charging refrigerant = Experimental of measurement flowrate method In cold storage through discharge pressure signal compressor value with refrigerant charging variation
"Flowrate merupakan parameter penting dalam sebuah sistem refrijerasi. Selama ini, pengukuran flowrate dianggap hal yang menyulitkan lantaran membutuhkan ketersediaan alat ukur. Oleh karena itu, berbagai alternatif pengukuran mulai dilakukan untuk mengatasi hal tersebut. Diantaranya adalah pengukuran flowrate melalui putaran motor pada kompresor torak. Dimana putaran tersebut dapat dibaca melalui sinyal tekanan keluaran kompresor yang kemudian diolah secara matematis untuk mendapatkan frekuensi dari putaran motor. Dalam hal ini, ada dua metode matematis yang digunakan untuk membaca frekuensi dari tekanan keluaran kompresor, yaitu Fast Fourier Transform (FFT) dan Chirp-Z Transform (CZT) dimana charging refrigeran divariasikan guna melihat pengaruhnya terhadap nilai flowrate yang didapat.
Flowrate is important value in a refrigeration system. During this time, flowrate measurement is considered difficult because it requires the availability of measuring instruments. Therefore, various alternative measurement begun to overcome it. Such as measuring flowrate based on the compressor speed in which it can be read by discharge pressure signal of the compressor and then it processed mathematically to obtain the frequency. In this case, there are two mathematical methods are used to find the frequency of the compressor speed, they are Fast Fourier Transform (FFT) and Chirp-Z Transform (CZT), where the refrigerant charging was varied to see its effect on the flowrate that would be obtained."
Depok: Fakultas Teknik Universitas Indonesia, 2012
S61720
UI - Skripsi Membership  Universitas Indonesia Library
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