Analisis Statis Konstruksi dan Lance Tube Sootblower Tipe Motorised Rotary Menggunakan Software Solidworks 2016

Sootblower is a boiler support equipment that works to clean soot. Sootblower requires a strong construction to support the components in order to work optimally. Sootblower is also not free from several failures on its components, the main component that causes failure on the sootblower is the lance tube. This study aims to analyze the static construction and lance tube motorized rotary sootblower type sootblower using Solidworks software. The method used in this research is a simulation based on the finite element method. The material applied to the construction is St 37 and the material on the lance tube is ASTM A213 T92. The static simulation results show that the construction design of the angle iron measuring 35×35×6 mm has a max stress value of 57,50 N/mm2 that occurs in the bolt hole, a value of max displacement of 0,0146 mm on the rod supporting the bearing, and a factor of safety value of 4,08 so it is safe to use. Static simulation on the design of 40 NB diameter lance tube with four thickness variations shows the highest max stress value, the highest max displacement, and the lowest factor of safety occurs in the lance tube thickness of 10,2 mm, which has a max stress value of 276,24 N/mm2, max displacement of 335,53 mm and a factor of safety 1,59. Lance tubes with a thickness of 10,2 mm can be declared safe because the value of the factor of safety meets the minimum limit for static loading.

Rancang Bangun Mesin Pencoak Pipa (Pipe Notcher) Multi Dimensi

Mesin pencoak pipa (pipe notcher) yang ada di pasaran saat ini harganya cukup mahal sehingga banyak bengkel-bengkel kecil masih menggunakan cara konvensional untuk melakukan pencoakan pipa. Cara yang biasa digunakan adalah dengan menggunakan gerinda tangan, sehingga membutuhkan waktu yang lama dan hasilnya kurang presisi. Untuk itu pada penelitian ini dirancang mesin pencoak pipa dengan memanfaatkan sabuk amplas sebagai V-belt yang dihubungkan dengan poros dan digerakkan oleh motor listrik. Kemudian benda kerja didekatkan pada poros matras dan selanjutnya ditekan maju sampai terbentuk profil yang diinginkan. Rancang bangun mesin pencoak pipa multi dimensi ini terbagi dalam tiga tahap. Tahap pertama konsep desain dan perencanaan komponen, dilanjutkan dengan tahap pembuatan dan terakhir adalah pengujian mesin. Dari hasil rancang bangun diperoleh bahwa mesin pencoak pipa multi dimensi ini menggunakan motor listrik 0,5 HP dan putaran 1400 rpm sedangkan rangka mesin menggunakan besi siku ukuran 4 x 4 cm. Setelah dilakukan pengujian, mesin dapat bekerja dengan baik. Untuk mencoak pipa dengan diameter 3/4 inch dibutuhkan waktu selama 0,335 menit, sedangkan untuk pipa ukuran 1 inch membutuhkan waktu selama 1,075 menit. Sedangkan profil yang dibuat menggunakan mesin ini mampu membentuk sudut antara 0° sampai dengan 30°. Pipe notcher on the market today are quite expensive so that many small workshops still use the conventional method for cutting special pipe profiles. The method commonly used is to use hand grinding, so it takes a long time and the results are less precise. For this reason, in this study was designed a pipe notcher machine using the sandpaper belt as a V-belt connected to a shaft and driven by an electric motor. Then the workpiece is brought closer to the mattress axis and then pressed forward until the desired profile is formed. The design of this multidimensional pipe notcher engine is divided into three stages. The first stage is the design concept and component planning, followed by the manufacturing stage and the last stage is machine testing. From the design results, it is found that this multi-dimensional pipe notcher machine uses an electric motor 0.5 HP and a rotation of 1400 rpm while the engine frame uses 4 x 4 cm angle iron. After testing the machine can work properly. To check a 3/4 inch pipe it takes 0.335 minutes, while for a 1 inch pipe it takes 1.075 minutes. Meanwhile, the profiles made using this machine are capable of forming angles between 0 ° to 30 °.

Experimental Assessment of Thermal Performance and Bridging Effects of Low-Cost Sandwich Panels under a High-Temperature Impinging Jet

Sandwich panels are commonly used across industries for their ability to bear structural and thermal loads. In this paper, a panel chamber matching apparatus was designed to investigate the thermal performance of eight steel-based panels by exposing them to an impinging jet at approximately 550 °C for 30 min. Three types of low-cost materials (polycrystalline filaments, silica aerogel, and aluminum silicate) were used as the insulation core. The temperature of the panel surfaces was measured, as well as the metallic fasteners, including bolts, nails, battens, seams, and angle iron, to examine their thermal bridge effects. Major conclusions include the following: first, the maximum temperature on the impinged surface was consistent among all 20 cases, whereas that of the surface under free convection varied, ranging from 41 to 120 °C, depending on the core and thermal bridges. Second, most of the highest temperatures on opposite surfaces were caused by a section of bare angle iron, and this bridging effect could be significantly reduced by up to 50 °C using a few layers of cloth, although the improvement could be temporary. Bolts and nails were less effective as thermal bridges, while the battens could be more effective. Third, the estimated heat flux of all specimens ranged from 167 to 331 W·m−2.

Design and Construction of Electric Fish Smoking Kiln Using Locally Available Composite Materials

The design and construction of low cost electric fish smoking kiln was undertaken with the aim of improving the existing fish-smoking kiln. The newly constructed kiln was made using locally available composite materials and technologies sourced locally. The kiln consists of smoking kiln chamber, heating elements, a variable thermostat, lagging materials of insulating clay wall which has a duration of not less than five years and metal frame made of angle iron on which the fish tray, oil collector pan were assembled. The production cost of the electric fish-smoking kiln is one hundred thousand naira compare with mechanical ones that cost within the range of three hundred thousand and four hundred thousand naira excluding transportation charges.

Particle Flow Testing of a Multistage Falling Particle Receiver Concept: Staggered Angle Iron Receiver (STAIR)

Falling particle receivers are an emerging technology for use in concentrating solar power systems. In this work, a staggered angle iron receiver concept is investigated, with the goals of increasing particle curtain stability and opacity in a receiver. The concept consists of angle iron-shaped troughs placed in line with a falling particle curtain in order to collect particles and rerelease them, decreasing the downward velocity of the particles and the curtain spread. A particle flow test apparatus has been fabricated. The effect of staggered angle iron trough geometry, orientation, and position on the opacity and uniformity of a falling particle curtain for different particle linear mass flow rates is investigated using the particle flow test apparatus. For the baseline free falling curtain and for different trough configurations, particle curtain transmissivity is measured, and profile images of the particle curtain are taken. Particle mass flow rate and trough position affect curtain transmissivity more than trough orientation and geometry. Optimal trough position for a given particle mass flow rate can result in improved curtain stability and decreased transmissivity. The case with a slot depth of 1/4″, hybrid trough geometry at 36″ below the slot resulted in the largest improvement over the baseline curtain: 0.40 transmissivity for the baseline and 0.14 transmissivity with the trough. However, some trough configurations have a detrimental effect on curtain stability and result in increased curtain transmissivity and/or substantial particle bouncing.

Study on Anti-Supporting Ceiling Construction Method

This document explains and demonstrates the problem that currently the installment of ceiling project’s bearing reaction is non-standard, combined with the example of the civil fitness center decoration project in Jinan which shows that all the ceilings should be installed with bearing reactions. This paper illustrate a construction program that by the use of L40 × 4 angle iron to enhance the bearing reactions based on the "GB50210-2001 code for construction quality acceptance of building decoration". Practice has proved that the stability and immobility of the ceiling’s bearing rations addition at the base of this program all meet the regulatory requirements. The program can be applied to all the ceiling projects that the bearing reactions are reburied when the boom is longer than 1.5m.

Pass Design of Finishing Mill Group of Angle Iron and Finite Element Simulation of Rolling Process

In this paper, the passes of 25 # equilateral edge angle iron finishing mill group were designed, which included finished product pass K1, and the intermediate passes K2、K3、K4, also the finite element software ANSYS / LS-DYNA was applied for three passes rolling process simulation to verify the rationality of passes design, and the rolling force curve was simulated. It offers a reference for of 25 # angle iron processing.

Development and Performance Evaluation of a Multipurpose Dryer

In this work an electrically operated thermostatic multipurpose dryer is developed and evaluated. It measures 2,300mm long, 600mm wide and 1,100mm high and consists of 50mm x 50mm mild steel angle iron and aluminium sheet wrapped all over it. The interior of the dryer is painted black to ensure maximum heat retention within the system for faster drying. The multipurpose dryer is constructed with the incorporation of vents to enable uniform air circulation within the system. This is to facilitate uniform drying of specimens. The development of the dryer is to help minimize losses of agricultural produce by drying them to the required moisture content that will enable them to be kept in storage. The dryer was used to determine the moisture content of coconut meat and it was found to be 53.47% and 1.15% wet and dry basis respectively. The dryer could be used to dry all agricultural produce to the required moisture content that will enable them to be preserved. This is achieved by selecting the appropriate temperature graduated on the dryer. The equipment has hot air at a velocity of 18.7m/s distributed uniformly across specimen trays in the drying chamber. As the hot air passes over agricultural produce in trays, the drying process takes place. It has been found that the multipurpose dryer is suitable for drying agricultural produce and other allied produce to the required moisture content up to a maximum temperature of 1100C. The dryer efficiency was determined to be 75%.