Wet granulation in laboratory scale high shear mixers: Effect of binder properties

The effect of binder properties on torque curves, granule growth kinetics, wet mass consistency and dry granule strength has been investigated in this study. Granulation runs have been performed on a fine cohesive microcrystalline cellulose powder (Avicel 105, d50 = 20 μm) in two types of laboratory high shear mixers: a Mi-Pro high shear mixer using a 1.9 L bowl and a 6 L Diosna high shear mixer. Binders used included ultra-pure water and solutions of varying concentrations of PVP and HPMC allowing us to cover different values for parameters like viscosity and work of adhesion. Torque curves recorded during granulation are found to allow good control of the process. Optimum liquid requirement for granulation has been found to vary with binder type and decrease with increasing viscosity while granule growth kinetics has been found to be to be related to the work of adhesion for low viscosity binders. Granule strength has been evaluated for wet granules by the means of wet mass consistency measurements on a mixer torque rheometer and for dried granules by means of uniaxial compression tests on a Texture Analyser mechanical testing machine. For low viscosity binders both wet mass consistency and dry granule strength have been found to depend on the work of adhesion. For high viscosity bindershigherwet mass consistencies but lower dry granule strengths have been observed. Granulating on the larger 6 L scale has shown that constant impeller tip speed offers good agreement in terms of mean granule size however granule size distribution seems to be scale dependan

PERENCANAAN KAPASITAS UNTUK MEMENUHI PRODUK DENGAN METODE CAPACITY REQUIREMENT PLANNING (CRP) DI PT. VARIA USAHA BETON WARU - SIDOARJO

PT. Varia Usaha Beton adalah suatu yang memproduksi berbagai jenis beton mensory atau beton ringan. Perusahaan ini memproduksi produk tersebut dengan memperhatikan mutu atau kualitas dari bahan yang diproduksinya.. Sistem produksi produk beton ringan terutama pada genteng beton sudah terbilang lama, dan akan dilakukan analisis kapasitas. Sehingga dapat ditentukan kapasitas yang optimal sesuai dengan kebutuhan demand produk. Berdasarkan hal tersebut maka diperlukan penelitian perencanaan kebutuhan kapasitas yang optimal, sehingga kebutuhan sumberdaya yang yang dibutuhkan dapat diterapkan. Capacity Requirement Planning ( CRP ) merupakan suatu metode yang digunakan untuk menganalisa kondisi kapasitas yang terjadi pada suatu perusahaan, yaitu sumber daya yang dimiliki oleh perusahaan tersebut baik sumber daya manusianya ataupun mesin yang dimiliki oleh perusahaan. Metode CRP ini untuk memberikan gambaran kondisi perusahaan, sehingga perusahaan dapat secepatnya mengantisipasi dan melakukan tindakan apabila terjadi kekurangan atau kelebihan sumber daya. Dari hasil pemecahan masalah dilakukan perbandingan antara kapasitas tersedia yang dimilliki dengan beban yang diterima sudah sesuai ataukah berlebihan atau kekurangan. Dari penelitian di PT. Varia Usaha Beton maka di dapat hasil kapasitas tersedia untuk seluruh plant area dengan 6 work center sebesar 4231.68 jam. Sedangkan kapasitas yang di perlukan pada plant area 1 (Genteng Nusantara) yaitu Work center 1(mixer kering) ; 595 , work center 2(mixer basah) ; 595 , work center 3 (mesin pres) ; 1983.32 , work center 4(rak isisan) ; 694.12 , work center 5(perendaman) ; 8726.64 , work center 6(pengeringan) ; 20428.32. plant area 2 (Genteng Elabama) yaitu Work center 1(mixer kering) ; 599.2 , work center 2(mixer basah) ; 599.2 , work center 3(mesin pres) ; 1997.28 , work center 4(rak isisan) ; 698.99 , work center 5(perendaman) ; 8788.22 , work center 6(pengeringan) ; 20572.48. plant area 3 (Genteng Ww Royal) yaitu Work center 1(mixer kering) ; 131.74 , work center 2 (mixer basah); 131.74 , work center 3 (Mesin pres); 460.48 , work center 4 (rak isisan); 163.22 , work center 5(perendaman) ; 698.7 , work center 6(pengeringan) ; 1635.64. plant area 4 (Genteng Ww Nusantara) yaitu Work center 1(mixer kering) ; 132.72 , work center 2(mixer basah) ; 132.72 , work center 3(mesin pres) ; 463.91 , work center 4(rak isisan) ; 160, work center 5(perendaman) ; 703.91 , work center 6(pengeringan) ; 1648

Design of Integrated Mixer for 5G Radio Transceiver

The increased demand of high data rate, low latency and wider bandwidth is pushing the wireless communication towards higher frequencies. 3GPP (third generation partnership project) allocated NR (new radio) FR2 (frequency range 2) n257 (26.5 - 29.5 GHz) and n258 (24.25 - 27.5 GHz) bands for high-speed communication. It is challenging to achieve high linearity at higher frequencies with low supply voltage and smaller size devices. This thesis presents design, implementation and simulation results of integrated downconversion mixer for modular 5G radio transceiver. The first stage downconversion mixer, implemented in GF FDSOI 22 nm process will be used in super-heterodyne double downconversion transceiver, operates at 28 GHz input frequency and provides 6-7 GHz intermediate frequency (IF). The pre-layout and post-layout simulation results of double-balanced mixer topologies optimized for high linearity are compared in terms of conversion gain (CG), input third-order intercept point (IIP3), double sideband (DSB) noise figure (NF), LO-to-IF leakage,and dc power consumption. The mixer topologies, including Gilbert cell and variants of Gilbert cell with resistive and inductive degeneration, and mixer with transformer input, show trade-off between conversion gain, linearity, dc power consumption, and area. Under 0.8-V supply voltage, the transformer input mixer achieves highest IIP3 of +16.34 dBm while dc power consumption including LO buffer is 5.7 mW and NFdsb is 13.7 dB

A 24-GHz CMOS Front-End

This paper reports the first 24-GHz CMOS front-end in a 0.18-µm process. It consists of a low-noise amplifier (LNA) and a mixer and downconverts an RF input at 24GHz to an IF of 5 GHz. It has a power gain of 27.5 dB and an overall noise figure of 7.7 dB with an input return loss, S[sub]11 of 21 dB consuming 20 mA from a 1.5-V supply. The LNA achieves a power gain of 15 dB and a noise figure of 6 dB on 16 mA of dc current. The LNA’s input stage utilizes a common-gate with resistive feedthrough topology. The performance analysis of this topology predicts the experimental results with good accuracy

Antarmuka Audio 4 Channel Input dengan Chip Atmega 328 Controller

Penelitian ini bertujuan menguji coba pembacaan output pada mixer dan memastikan low noise pada output suara. Data yang didapat merupakan hasil dari interface dari pembacaan audio komputer dengan resolusi interface 16 bit/48 khz. Uji coba akhir ini berupa penggunaan mixing untuk dihubungkan dengan interface pada komputer. Uji coba ini didapatkan data pembacaan signal analog dari mixer audio. Metode yang digunakan pada penelitian ini terbagi beberapa tahap yaitu (1) Analisis masalah, (2) Mengumpulkan informasi, (3) Mendesain alat, (4) Membuat alat, (5) Pengujian alat, (6) Mengumpulkan data, (7) Menguji coba akhir. &nbsp