Pengembangan Tungku Briket Batubara Skala Rumah Tangga

Improving of a coal briquette stove is required in the context of energy diversification for strengthening national energy security. The policy of kerosene conversion to LPG is a short term policy and needs other source of energy alternative. In idealized sense, all potentials should be used for household cooking, not always depending on a particular energy source. Purpose of this research was to improve a household coal briquette stove to increase stove efficiency and ease in ceasing the ember. Design criteria of the coal briquette stove were based on heat transfer from the burning coal to the heated object, ease in ceasing the ember, and facilitating the exhausting smoke from the kitchen room. Performance test to the designed stove was conducted on analyses of temperature at the bottom of a pan versus time during the firing, heat efficiency, and the time of ceasing ember. The results showed that the cooking temperature (>180 oC) was reached after 35-65 minutes. The cooking temperature lasted for 4 hours, heat efficiency of 25.5 % was about optimum, and the time of ember ceasing was 19-33 minutes

Waste Cooking Oil Gasification with Pressure Stoves

Kerosene gasification with pressure stoves have been applied to people such mawar stoves. use of waste cooking oil as fuel for pressure stoves are still in the early stages of research. Waste cooking oil viscosity higher than that of kerosene, this is a problem in the use of the mawar stove, since mawar stove used of oil pipeline smaller than 2.5 mm. The research was carried out by utilizing the mawar stove by using waste cooking oil fuel. The results showed that the flow rate of kerosene from 2.33 to 4.08 ml/s on stove and flow rate of waste cooking oil on the stove from 0.39 to 0.66 ml/s with a pressure stove 6-3 psia. Waste cooking oil can be used as fuel for mawar stoves with pressure more than 4 psia and fire to preheat stove for waste cooking oil is greater than with the use of kerosene fuel

Design of Solar Thermal Collector Tool with Thermosifon System

Limited availability of fossil energy requires us to find for alternative energy to meet our needs. Solar thermal collector with thermosifon system is one of environmentally friendly alternative energy. The thermosifon system is a natural pump which work based on density difference between cool water and hot water, so that no electric pump is needed. The purpose of this research was to create a mean of collecting solar thermal energy with thermosifon system. The research steps consist of designing, manufacturing, and testing. Thermal collector was made with dimension of 1,5 m long, 1,0 m wide and 1,0 m high, with storage tank capacity of 20 lt. Collector testing was conducted by putting the equipment at an open space from a clock 08:00 – 16:00. It was found that the highest efficiency of solar collector (11,2 %) occurred on July 11, 2012 with an average solar intensity of 756 W/m2, where as the lowest efficiency (8,8 %) occurred on July 7, 2012, with the average solar intensity 479 W/m2. The highest average temperature of the storage tank was 44,7 ºC on July 13, 2012 while the lowest average temperature was 35,3 ºC on July 12, 2012

Rancang Bangun Alat Penyusun Rak Penjemuran Diatas Para- Para Ke Dalam Boks Secara Semi Mekanis

Drying process by using Para-para is more effective than the conventional one which uses floor surface or plastic(terpal). The products will dried faster and cleaner, nevertheless the system tomoveand to arrange the finalproductis wastes a lot of time and energy. Hence, the objective of this reasech was to make a semi-mechanicalPara-para drying shelf that integratedly connect to semi machanic box in order to save time and energy uses. Thissemi-mechanical drying device contained of two frames, four shelves, two ropes,two box movement holdings,boxes, spring, big pulley and small pulley. The process started bywaiving its hook from the shelves thus the treadlewould pull the other connected components to the shelves and automatically move to the box. The pulleys wereused to set the shelves movements to the boxes, consequently the box will consecutively move to next lowershelflevel after being filled Furthermore, filled boxes caused an increasing of tensile strength which also increasethe speed of box movement. Box retention rate was used to decrease the fourth shelf speed that will prevent loss.The device were tested by dryingcassava and soybean. Finally, the result showed that it only consume 1,19seconds to move and arrange the product with less manpower assistance. Moreover, Para-para were succesfullysave time and manpower compared to manual movement which only take approximately 11,83 seconds for eachshelf

Rancang Bangun Bucket Elevator Pengangkat Gabah

Farmers are generally included the grain into sacks manually way is to use the tub or bucket. It certainly require excessive manpower. An option to helping that activity by using mechanical handling devices such as bucket elevator. This research aims to design, manufacture and test of bucket elevators for handling of grain. The method used in this research is the design, manufacture and testing process. Design process is done using software autoCAD, which is followed by a manufacturing. The next process is the testing performed by two operators and three variation rotation. After doing the design and manufacture, it produced a bucket elevator with chain tilt angel 60º, 76,3 cm length, 74,15 cm width and 146 cm high. From the test results, obtained volume of bucket 0.410 liter/bucket. Capacity bucket elevator reach 20 kg/min, 16 kg/min and 14 kg/min at 54 rpm, 39 rpm and 45 rpm rotation sprocket. The highest capacity 20 kg/min achieved at 5 inch diameter pulley, with 54 rpm rotation sprocket

Implementasi Pengelolaan Hibah Pada Badan Pengelolaan Keuangan Dan Aset Daerah Provinsi Sulawesi Tengah

The research aimed to determine the implementation of grant management conducted by the regional finance and asset management in Central Sulawesi province and the factors that influenced the implementation of the grant management carried out either support or inhibit, the informants in this study was 5 forms that consist of 3 employees of the financial and asset management in Central Sulawesi province and 2 grantees. Informant\u27s determination was done by purposive sampling. Data collection using observation, interviews and documentation. Data were analyzed by descriptive qualitative. The results showed that the implementation of grant management included communication, resources, disposition / attitude and bureaucratic structure have not been effective. Implementation of these policies were also influenced by various factors both support consisted of financial management policies and the number of personnel resources and hampering consisting of regional conditions and the quality of personnel resources. Researcher also suggested that increasing the effectiveness of policy implementation grants to improve the ability and knowledge and professionalism of personnel resources owned in understanding and implementing government policies, especially policies for the management of grants, provided technical guidance related to the grant management personnel resources in order to improve the competence and professionalism therefore, could execute all programs and government policies, especially related to grants and policy operational standards and procedures (SOP) on the management of grant thereafter shall be a decision and can be used as the gold standard in managing grants

Uji Kinerja Prototipe Alat Pengirat Bambu

Bamboo is becoming versatile plant for rural communities for many utilities, such as house, bridge, ladder, Geribik, fence, handicraft, etc. Now, Indonesian bamboo craftsmen are still using a manually method to rod bamboo. So that it is needed to make a tool that enhances efficiency and quality of bamboo strip as raw material to produce bamboo-made handicrafts. This study aimed to make a tool that enhances efficiency and quality of bamboo strip as raw material to produce bamboo-made handicrafts.The steps are as follows one bar of bamboo was cutted with 0.5 m length and 0,15 width. Then, the outer skin was peeled before it was sliced into some strips. Next, the strips of bamboo was feeded to a channel and booster unit in a spinned condition. Each tests were repeated 3 times i.e. 5 samples in wet condition and 5 samples in dry condition. Part of tested bamboo was classified into 3 types i.e. culm, middle and end. Then, percentage of rodent bamboo, and the period of split process.The performance test of splitter bamboo tool for wet bamboo found that the percentage of bamboo culm is 33,33 %, middle 20 % and end 26,67%. Based on the percentage, Culm has bigger percentage than others due to the culm has a more suitable thickness with the knife from the splitter tool. Whereas the dry of the sample found that the percentage of culm, middle is similar about 33,33 % and the end part of the bamboo has percentage around 20 %. This condition exists since the dry sample of the bamboo has a more stabilized texture than the wet one due to still high water content