Uji Kinerja Tungku Pangggangan

The purpose of barbequing is to cookfood and provide a distinctive smoke aroma. This research aims at testingandperforming of a furnace grill. Thefurnace grill was fabricated with main components including combustionchamber, roasting rack, nozzlepipe, and a blower. Thegrill was designed with a roasting rack of 1800 cm 2 and hada capacity of 16 piece of chicken parts.Grill testing was conducted with and without roasting load.The parameterto observing included fuel capacity, roasting temperature, weight loss, amount of fuel consumption, airconsumption, and roasting duration. Results using coconut shell charcoal showed that the grill working goodwith roasting temperature of 416.3 o C. The grill had a fuel capacity of 2 kg with coconut shell charcoal and airconsumption of 25.44 kg. The roasting capacity was 16 pieces of chicken breast and was 16 pieces of chicken leg.The average roasting duration was 4.84 minuteswith 2.3 minutespausefor preparation and serving. Workingcapacity of the grill was 144 pieces per hour for chicken breast and 142pieces per hour for leg. Average weightloss was 20.5% and 11.3% for chicken breast and chicken leg, respectively. Fuel consumption for each roastingprocess was 395.5gram ofcoconut shell charcoal, equivalent to 13.441 kJ. Electric power consumption was150.13 kJ for each roasting process

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 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

Design and Performance Test of Corn Rice Granulator Machine

Development in science and technology today has been able to produce instant nutritious foods, such as imitation rice. The application of conventional technologies in the granulation process causes minimal quantity and quality of the imitation rice with corn feedstock generated. The purpose of this research was to design and to test its performance. This research was conducted at the Laboratory of Agricultural Engineering, Agricultural Engineering Department, University of Lampung. This research procedures included several stage: design, assembly, testing, observation and data analysis. The corn rice granulator machine is designed to the specifications of length 140 cm, width 75 cm, and height 170 cm and comes also with other components, such as hopper, sprayer, sweeper, corn rice container, electric motors, gearboxes, pillow block, and couple units. Some of component settings in the testing of this machine: the slope of granulator pan at 35°, discharge of hopper 0,2 kg/sec, discharge of water sprayer 0,54 mℓ/sec, speed of granulator pan rotation 28 RPM, and the clearance between corn rice container and granulator pan by 5 cm. The results showed that, this granulator machine had production capacity of wet corn rice up to 10,92 kg/hour, and efficiency of granulation up to 78,18%, for the raw material with composition 75% corn flour and 25% tapioca flour

Technical and Cost Performance of Microhydro Power Plant

The increase in electricity consumption in one side and the depletion of fossil fuel sources in the other side have triggered Indonesia to support any development of renewable-based electricity generation, including microhydro-based power plant. The objective of this research was to investigate technical and cost performance of microhydro power plant. Observation was conducted on four microhydro power plants located in Bogorejo village, Sub district of Gedong Tataan, Pesawaran District, Lampung Province. The plants were developed and self-managed by the community. Parameters to be measured or recorded included head of water, voltage and electrical current produced from the generator, number of family serviced by the plant, and electricity price that community should pay. Results showed that power output of the plants was ranging from 314 to 1805 W with 2 to 20 families were serviced for each unit. The research revealed that output power was related to the combination factor of head, the diameter of base penstock pipe, and inverse of generator's pulley size. The output power was also linearly related to installation cost. With an installation cost of 8 to 40 million rupiahs per unit, the electric energy price was in the window of 633 to 973 rupiahs per kWh. It was concluded that Rohman's microhydro, with power output of 1805 W and energy price of Rp.633/kWh, was the best compared to the others

Uji Kinerja Penjemuran Gabah Pada Para-para Mekanis Dengan Tiga Kondisi Lingkungan

Traditional grain drying is a practical way of drying grain, cheap, simple and commonly used by farmers. Grain is spread on the floor which causes grain mixed rock and dirt around the drying floor. Disadvantages in traditional grain drying are it requires a lot of manpower to spread, to flip back and to collect the grain, and requires large floor for drying. On the other hand, grain drying using mechanical rack has the advantage that it avoids some of the grain that is not mixed with rock and dirt while drying, shorten the drying time, and easily move the grain when it rains. The purpose of this study was to test the performance of mechanical dryer. The experiments were set up with drying treatment at 80 cm above the surface of the cement floor, on top of grassy land surface, and on the surface of rocky land with 4 cm thick of sample. The parameters measured in this study were consisted of drying time, moisture content, drying rate, energy of radiation received, the energy to evaporate the water and heats of the material, and drying efficiency. The results of research on the treatment of three environmental conditions indicated that. The average water content was 13.90% wb, 13.82% wb, and 13.98% wb respectively for the surface of the cement floor, on top of grassy land surface, and on the surface of rocky land. The average drying rates in this study were 0.494% /h for the surface of cement floor, 0.487% /h for on top of grassy land surface, and 0.534% /h for on the surface of rocky land. Drying time in this study were 10 - 11 hours with an average radiation energy received on this experiment at 614.42 Watt/m2. Drying efficiency of each treatment were 12.58%, 12.43%, and 13.72% respectively for the surface of the cement floor, on top of grassy land surface, and on the surface of rocky land. From the observations and calculations derived drying over the surface of cement floor, on top of grassy land surface, and on the surface of rocky land are recommended for drying using a mechanical rack dryer

Performance of Machines Thresher Seeds Job\u27s Tears (Coix Lacryma-jobi L.) Rubber Roll Type

Job\u27s tears (Coix lacrhryma jobi L.) was a plant that came from South Asia and East Asia. The distribution of this plant was expanded to Southeast Asia, especially Indonesia. In Indonesia, Job\u27s tears was found in Sumatra, Java and Kalimantan. Its seeds had many benefits as herbs or plant consumption. Threshing process of this plant was still using a traditional way. This research was purposed to design and test the performance of jali thresher machine type rubber roll. This research was conducted in February 2013 to March 2013 in the Laboratory of Agricultural Engineering, Department of Agricultural Engineering, Faculty of Agriculture, University of Lampung. This research procedure included several stages: design, assembly, testing results, and data analysis stage. Observations were made for machine capacity per hour, percentage of threshed seeds, and percentage of good or damaged threshed seeds. This research used 3 cylinder rotational speeds: 50 RPM, 38 RPM and 30 RPM. Results of this research indicated that this machine threshed seeds by 47 kg/ hour

Pengendalian Temperatur dan Kelembaban dalam Kumbung Jamur Tiram (Pleurotus SP) secara Otomatis Berbasis Mikrokontroler

Oyster mushroom can grow properly at temperatures of 16–30 °C and relative humidity of 80–95%. Environment conditioning by spraying of water in mushroom house manually in the morning and evening as the temperature and humidity controling is less effective and highly bothersome. Using of technology can controlling temperature and humidity in a mushroom house automatically. This research aims to design an automatic control system to control temperature and humidity in oyster mushroom house. Research is located at an altitude of 125 meters above sea level. Automatic control system with a setting point temperature of 25 – 30 °C and humidity of 80 – 95% was tested at mushroom house with dimensions of 4 × 2 × 2 m with a capacity of 600 baglog mushrooms. The results show that the performance of daily temperature and humidity without control is respectively 24.10 to 35.19 °C and 64.28 to 99.90%. While the temperature and humidity with the control system are 25.10 to 30.09 °C and 80.84 to 99.90%, respectively

The Potential of Community Acceptance on Ub-03 Biomass Stove

UB-03 stove is a modern and efficient stove fueled by solid biomass, like pieces of branches, corn stalks, pieces of scrap wood, palm shells, and trash briquettes.. The objective of this study was to determine the potential of community acceptance on UB-03\u27s biomass stove. The research was conducted from February 2013 to March 2013 in namely Way Halom village, Sub-district of Gunung Alip, District of Tanggamus and Sidosari village, Sub-district of Natar, District of South Lampung. The methods used in this study include direct interview, demonstration of using UB-03 stove, and questionnaires. Data collected together with stove appearance (model, performance, price) was used to analyze the influence of education level and income rate to community acceptance towards UB-03 stove. The results showed that people in Sidosari and Gisting (80% of respondents) potentially receive and willing to use the UB-03 stove. In both villages, education level and income rate affected people willingness towards UB-03 stove. Respondents with education level from elementary to high school were highly interested (80%) towards UB-03 stove. People having diploma degree and above, however, were less interested to the stove. Communities with income rates between Rp.500.000, - up to Rp.2.000.000,- showed high willingness in using the stove. In Sidosari, people with income over Rp.2.000.000,- showed less interested. Stove\u27s price that could be accepted in the two villages were in the range of Rp.35.000,- to Rp.75.000,-

The Potential of Community Acceptance on Ub-03 Biomass Stove

UB-03 stove is a modern and efficient stove fueled by solid biomass, like pieces of branches, corn stalks, pieces of scrap wood, palm shells, and trash briquettes.. The objective of this study was to determine the potential of community acceptance on UB-03\u27s biomass stove. The research was conducted from February 2013 to March 2013 in namely Way Halom village, Sub-district of Gunung Alip, District of Tanggamus and Sidosari village, Sub-district of Natar, District of South Lampung. The methods used in this study include direct interview, demonstration of using UB-03 stove, and questionnaires. Data collected together with stove appearance (model, performance, price) was used to analyze the influence of education level and income rate to community acceptance towards UB-03 stove. The results showed that people in Sidosari and Gisting (80% of respondents) potentially receive and willing to use the UB-03 stove. In both villages, education level and income rate affected people willingness towards UB-03 stove. Respondents with education level from elementary to high school were highly interested (80%) towards UB-03 stove. People having diploma degree and above, however, were less interested to the stove. Communities with income rates between Rp.500.000, - up to Rp.2.000.000,- showed high willingness in using the stove. In Sidosari, people with income over Rp.2.000.000,- showed less interested. Stove\u27s price that could be accepted in the two villages were in the range of Rp.35.000,- to Rp.75.000,-