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INDONESIA
Jurnal Teknoin
Published by Universitas Islam Indonesia
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Engineering
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Articles 5 Documents
 1 
Search results for , issue "Vol. 24 No. 2 (2018)" : 5 Documents clear
Analisa faktor-faktor penyebab perubahan efisiensi boiler jenis pulverized coal fired forced circulation sub-critical pressure menggunakan metode tak langsung Muhammad Sagaf
Teknoin Vol. 24 No. 2 (2018)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknoin.vol24.iss2.art5

Abstract

The Boiler is one of the equipment in the steam power plant which their reliability will be decreased by annually. Boiler degradation can be observed by the decreasing value of boiler efficiency every year. To maintain the efficiency it is necessary to know the main cause of degradation factors. PLTU Tanjung Jati B Unit 3 and 4 using pulverized coal fired boilers with forced circulation and sub-critical pressure type, the steam capacity is 2x2280 tons / hour to generate electrical energy of 2x660 MW.Boiler Efficiency is calculated by indirect method with uncertainty rate (0.4% -0.8%) in every boiler heat loss. The highest efficiency of boiler Unit 3 was achieved during Commercial Operation Date (COD) in 2011 with 89.71%, while Unit 4 achieved on the 2nd test performance in 2013 with 89.61%. The lowest boiler efficiency value for Unit 3 on the 9th performance test in 2016 with 88,36%, and Unit 4 was on 9th performance test in 2016 with to 87,48%. The degradation of Unit 3 boiler efficiency during 6 years is 1.35% or 0.225% per year. While the degradation of Unit 4 boiler efficiency during 6 years is 2.13% or 0.355% per year. The major of boiler heat loss were from exhaust gas (L1), moisture content of burning hydrogen in fuel (L3) and heat loss due to the moisture in the fuel (L2). The main factors losses in boiler is caused by ash deposits in the economizer area, it make inhibition of heat transfer from (flue gas) to economizer tube, the others from the use of three types of coal which have different characteristics.
Pengembangan desain blangkon dan kemasan blangkon dengan metode Quality Function Deployment (QFD) Dian Janari
Teknoin Vol. 24 No. 2 (2018)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknoin.vol24.iss2.art1

Abstract

SME have an important role in improving the economy. There are a number of fields that many SME are involved in, one of which is in the clothing sector. The object of this research is Blangkon production in Beji Village, Yogyakarta. According to Blangkon craftsmen in Beji, less attractive of Blangkon design and packaging have influenced the decreasing of sales number. This study aims to determine the technical requirements and improvements needed for both variables employing the QFD (Quality Function Deployment) method and HOQ (House of Quality). The customer requirements are consisted of exclusive materials, model, durability, convenience, size, color, style, price, and packaging including logo, motif, form, and material. The results showed that exclusive materials, model, packaging motif, and packaging form are required to be improved. Meanwhile, durability, convenience, packaging logo, and packaging material must be maintained and innovated continously. The remaining criterias are maintained. There are 3 design concepts proposed which the design concept C is selected. The second HOQ is applied in order to obtain technical requirements requested.
Pemanfaatan energi terbarukan untuk perancangan sistem rotary dryer pada tahap pengeringan daun teh hijau di Kulonprogo Evrita Lusiana Utari
Teknoin Vol. 24 No. 2 (2018)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknoin.vol24.iss2.art2

Abstract

Indonesia receives solar energy with an average daily energy radiation per unit area per unit time of approximately 4.8 kilowatts / m2. Solar energy is one of the abundant, pollution-free, renewable energy sources and can be explored optimally. In the use of solar energy, it is necessary to develop a technology that is able to convert solar energy into the desired energy, namely electricity. The supply of electrical energy during the day can still be controlled by the solar cell, while at night it is controlled by a battery of 3600 mAH. This technology is known as solar cell or in the international world better known as solar cell or photovoltaic. Solar cell is a tool to convert solar energy into electrical energy. Photovoltaic is a technology that functions to convert or convert solar radiation into electrical energy directly. Rotary dryer is a dryer which is shaped as a drum and rotates continuously which is heated by a heater. A rotary dryer consists of a rotating cylinder and is used to reduce or minimize moisture in the contents of the material and its handling is direct contact with the heat in the drying chamber. The design of the rotary dryer system for the drying process of tea leaves requires a setting temperature of 90oC with a drying time of 15-25 minutes. The energy needed to supply power in the rotary dryer is 1000 WH.
Sebuah studi literatur mengenai pengukuran kinerja rantai pasok pada industri strategis di Indonesia Joko Sulistio
Teknoin Vol. 24 No. 2 (2018)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknoin.vol24.iss2.art3

Abstract

Article 33 in 1945 Constitution of the Republic of Indonesia is the essence of strategic industry operative. Consistent with supply chain management (SCM), the objective is to fulfil costumer value. Therefore, SCM performance measurement become significant. The current measurement was not developed from the article 33. This research objectives are to study the current measurement framework and to discover research gap to develop measurement framework suitable for strategic industry in Indonesia. The method used in this research is systematic literature review. This study found that there is no performance measurement that developed upon article 33. Further performance measurement development is crucial to accommodate article 33 and grounded theory is promising for such work. 
Verifikasi citra tanda tangan berbasis perceptron Latifah Listyalina; Irawadi Buyung
Teknoin Vol. 24 No. 2 (2018)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknoin.vol24.iss2.art4

Abstract

A signature has become an important human attribute, which can represent personal information. Human signatures are widely used to authorize documents, both paper-based as well as electronic-based ones.  However, such authorization still poses various privacy issues, such as signature duplication and forgeries. These may not be easy to be addressed, particularly when involving many documents. Hence, advanced procedures are required to verify the signature authenticity. In this paper, we propose a new method for automatic signature verification based on the digitalized signature images. The method comprises successive image processing techniques, such as cropping, resizing, gray-scaling and thresholding. The binary images as the results of thresholding serve as the features of the signatures and are used to train a single layer Perceptron neural network. The experiment in this paper uses 42 digitalized signatures images, collected from two subjects. The obtained images are divided into the training and testing sets, in which the training and testing sets comprise 14 and 28 images, respectively. In the experiment, the proposed method produces the average training and testing accuracies of 100% and 98.85%, respectively. These indicate that the proposed method is reliable for practical applications.

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