IPTEK Journal of Proceedings Series
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Experimental Study Of R141b Flow Boiling Compact Evaporator in Organic Rankine Cycle for Waste Heat Recovery
Get PDFIndonesia is one of country that has plenty geothermal energy resource. Because of the significant potential, the energy can be used as a power plant. Geothermal resource with low pressure and temperature can be used in Organic Rankine Cycle (ORC) technology. ORC is one of power plant system which can use waste energy by using organic working fluid or refrigerant that is able to evaporate at low pressures and temperatures . In this research, experimental of evaporator by using the organic Rankine cycle system from the gas stove heat source.The experimental study was conducted by experimenting of evaporator Compact Heat Exchanger continuous fin type. For know typical of heat transfer, evaluation proses make three region, subcooled, evaporation and superhaet. The prediction of the Two phase change flow pattern was observed in detail against the effect of heat flux and mass velocity variations by Chen and Shah Correlation. The phase change process occurs under pressure conditions P = 5 bar where the saturation temperature is 86.9 oCFrom the calculation and analysis, the maximum rate of heat transfer is 17.345 kW at 468 kg/m2s and heat flux 83 kW/m2. The evaporation process occurs at temperatures above 95 oC. Internal tube heat transfer coefficient of two-phase convection with consideration of the highest nucleate boiling and convective boiling of the evaporator was 2443.69 W/m2K in 234 kg/m2s mass flux refrigerant. Heat Flux with 1.94 kW/m2 heaten (Chen's Methode) and from the result of analysis proposed by Shah's Methode was obtained 1624.90 W/m2K in 468 kg/m2s mass flux refrigerant and 1.94 kW/m2 heat flux. the value of convection coefficient varies to the value of heat flux, mass flux and quality vapo
Design of Enterprise Application Integration (EAI) in E-Planning and E-Budgeting Systems
Get PDFInformation system integration is needed to support business processes in order to achieve organizational goals. E-Planning and E-Budgeting are systems that are managed by the Department of Communication and Information Technology in Pasuruan Regency. E-Planning is taking part in planning activities, while E-Budgeting is taking part in assigning activities budget. Both systems are working separately that may cause data to exist only in one of those systems. Lacks of data in another system can lead to activity without fund and vice versa. Of course, this problem can disrupt the annual budget plan of the Department of Communication and Information of Pasuruan Regency. This problem can be solved using Enterprise Application Integration (EAI). EAI allows the exchange of data and business processes from several different applications that are interconnected. EAI have 12-steps program that come from best practices for system integration. Despite requiring full steps, this research will only take the first seven steps and then proceed with making UML diagrams. The result of this research are UML diagrams such as use case diagram, class diagram, sequence diagram, and object-oriented data model. These designs can represent business processes that are needed for integration process between E-Planning and E-Budgeting system. These designs will be validated through user debriefing and user validation. These designs can be used as references to build a system to integrate E-Planning and E-Budgeting system
Recreation Concept of The Chocolate Farmer Education Complex in North Kalimantan
Get PDFThe chocolate farmers in North Kalimantan, many do not know how and good chocolate treatment techniques, in order to get quality cocoa with high selling value. So that the resolution of the problem is by increasing the interest of the community, especially cocoa farmers, by providing attractive and comfortable containers, so that cocoa farmers can maximize the natural resources found on Sebatik island, North Kalimantan. To achieve this, the method used is to provide educational buildings, cocoa gardens, and processing facilities in one area. The process of obtaining a recreation concept in the chocolate farmers education complex includes several stages, ranging from identification, case studies, design programs and the basic concept of design. After going through these stages, a recreation concept is obtained in the form of a linear and centralized pattern of land structuring, which is a guide for visitors to access various facilities in the educational complex. It is expected that with the concept of this chocolate farmers education concept, it becomes a place of education and tourism that provides visitors with new comfort and knowledge
Influence of Aging Temperature During Artificial Aging Process on Aluminium Alloy to the Mechanical Properties
Get PDFThe aging process is a hardening process that aims to change the physical properties and mechanical properties of the material according to needs. This process is carried out by holding the heating process at a certain temperature for a certain period of time. Aluminium alloys have good mechanical properties. One way to improve the mechanical properties of a material is by hardening process. This aging process is one example of the hardening process. In this study, an artificial aging process was carried out on aluminium 6061 alloys. Analysis was carried out on the effect of aging temperature during the artificial aging process. Temperature variations used are 100, 125, 150, 175, 200oC. The holding time is 1 hour. At the beginning of the process, heating with a heat treatment solution was carried out at 300oC for 1 hour. Then quenching with water media. The next work process, heat treatment is carried out with the variations mentioned above. The last step is to do quenching again. Analysis of the mechanism is carried out on impact strength, hardness value and microstructure. The results of the analysis show that the best aging temperature range during the artificial aging process in 6061 aluminium alloys is at 150 to 200oC. In this study, the best impact strength was produced at an aging temperature of 200° C, the best hardness value at an aging temperature of 150° C and a microstructure that contained the least precipitations at a temperature of 200°C
Analysis Implementation of The Project Management Tools and Techniques PT. XYZ in Indonesia
Get PDFThe level of business competition of an organization at this time is increasingly high. This is caused by economic factors and the presence of new competitors. Many organizations do not have the ability to deal with these conditions. Management of innovation and improvement that is limited by time, cost and quality are referred to as project management. Many methods, techniques, and tools have been developed, covering all aspects of project management from start to finish. If project management practices are implemented correctly, it allows for increased efficiency and productivity. In this study, how project management is implemented by evaluating the use of project management tools and effectiveness in supporting projects that run in the organization of PT. XYZ. This is done by distributing questionnaires to 30 respondents involved in the project that was carried out in 2018 to the present. The analytical method used is descriptive analysis and inferencing using SPSS used to determine the use of tools and project management techniques. Results in this study project management tools and techniques most often used by PT XYZ are progress reports, activity lists, and project charter. From the position positional factors and managed project costs factors are have significant value that affects the use of project management tools and techniques at PT XYZ in Indonesi
The Effect of Addition Electrical Supercharger on Diesel Dual Fuel Engine with Variation of Air Mass Flow Rate to The Engine Performance and Emissions
Get PDFDiesel Dual fuel system is a diesel operated by using dual fuel CNG and diesel fuel as a pilot fuel. The problem that often occurs in dual fuel system is the reduced ratio of air and fuel. This causes the thermal efficiency to be lower. So in this study mounted electric supercharger as an air supply for performance and efficiency, and emissions from diesel engines better. This research uses diesel engine type Diamond Di 800 with dual fuel indirect injection model system. The method used is to vary the air mass flow rate (ṁ) through intake manifold to the combustion chamber 0.0063 kg/s, 0.0072 kg/s, 0.0077 kg/s, 0.0087 kg/s, and 0.0095 kg/s by adjusting the voltage on electric supercharger 8V, 9V, 10V, 11V, and 12V. Measurements are made to: the current and the voltage of each load, the consumption time of 25 ml diesel fuel, and the exhaust emissions (CO, HC, and PM). The best result was found that the addition of air mass flow rate (ṁ) to dual fuel system had no significant effect on the engine's effective power, torque, Bmep when compared with single fuel. The addition of air mass flow rate (ṁ) 0.0087 kg/s can substitution the diesel fuel by 56.45%, thermal efficiency increased by 33.57% but under single fuel condition, and increase the average AFR by 64.31%. The average CO and HC emissions decreased by 15.18% and 62.35% even though they were under single fuel condition, while the PM emissions increase with increasing loads but compared to single fuel decreased by 75
Architecture as a Syntax for Elderly Rejuvenation Design Proposal for Tropical Climate Country
Get PDFIn an urban environment, the growing number of elderly population increases because of the increase in life quality. In order to face the increasing amount of elderly, the elderly needs to be empowered so they can still productive in their aging phase. This design research aims to upgrade the quality of Small Office/Home Office (SOHO) for the elderly through behavior setting of elderly by using Space Syntax. Field measurement and interview were conducted to obtain data for simulation using Depth Map analysis to predict room connection and integrity. The result highlighted that resilience design conducted through respect to the relation between the room that can lead elderly rejuvenation in tropical climate countr
Landslide and Mudflow Behavior Case Study in Indonesia: Rheology Approach
Get PDFLandslides and mudflows, both of which are triggered by rainwater and earthquakes, frequently occur in Indonesia. However, a conceptual and analytical understanding of these phenomena has yet to be achieved. The conventional calculation method (i.e., the limit equilibrium method) has not been able to predict the affected area after a landslide. Therefore, a rheological approach, the Bingham model (yield stress and viscosity), was applied in this research. Twelve cases of soil movement were assessed. High-plasticity silt is a type of fine soil with the potential to cause landslides and mudflows. This study comprises field data collection, soil sampling, laboratory testing, numerical modeling with a specific software, and result analyses. This study contributes explanation for the movement mechanism based on soil type, source area position to deposition area. New test laboratory innovation (flow box test) was introduced, and landslide and mudflow classification based on rheology approach were proposed. Examples of soil movement mitigation strategies are also presented to provide an overview of protective efforts against landslides and mudflows
Peningkatan Kualitas Aneka Olahan Bandeng: UMKM di Kelurahan Keputih
Get PDFPotensi Kelurahan Keputih Kecamatan Sukolilo Wilayah Surabaya Timur yang mempunyai tambak dengan luas mencapai 1.278 ha; menjadikannya salah satu tempat konservasi. Bandeng organik sebagai produk unggulan di Kelurahan Keputih mempunyai peluang besar untuk dibudidayakan dan dikembangkan. Bandeng organik sebagai produk unggulan tambak di Kelurahan Keputih sangat besar manfaatnya guna meningkatkan penghasilan dan sumber gizi yang sangat baik. Hingga saat ini tingkat perekonomian petambak di Kelurahan Keputih masih tergolong rendah, hal ini dikarenakan petambak langsung menjual hasil panennya ke pengepul yang ada di sekitarnya atau pasar terdekat. Melalui kegiataan Pengabdian Kepada Masyarakat berbasis Penelitian ini dilakukan upaya peningkatan pendapatan masyarakat melalui diversifikasi produk olahan tambak selain bandeng presto maupun bandeng asap. Rumput laut juga digunakan sebagai bahan tambahan guna meningkatkan gizi sekaligus meningkatkan nilai jual hasil tambak. Upaya ini dilakukan sekaligus untuk meningkatkan pendapatan masyarakat du Kelurahan Keputih melalui diversifikasi produk olahan tambak dengan rumput laut sebagai bahan tambahan