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Rancang Bangun Boiler Pemanas Tahu Kapasitas 90 kW Dengan Tungku Gasifikasi Berbahan Bakar Sekam Padi Ahmad Maulana Kartika; Aa Setiawan; Dedi Suwandi; Wardika Wardika
JURNAL MECHANICAL Vol 8, No 2 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v8.i2.201708


Boilers that used in the tofu industry in Indramayu are still use firewood as a fuel. The use of firewood as a fuel in boiler is not effective because it affects the destruction of forests as producers of plants (timber) and oxygen in earth. On the other hand there are also many rice husks that mount in the rice mill and has not been utilized by the surrounding community. Therefore, this research is conducted to utilize rice husk as fuel in boiler for cooking tofu with boiler. This research begins by doing a survey in the field of industry to know about the capacity of traditional wood-fired boilers, which capacity is obtained of 90kW capacity. Then the next step is making boiler husk based on the existing calculations to determine the size of the boiler to be made. Data retrieval is carried out until the temperature of the air boils with a tolerance of up to 30 minutes. Based on the results of the test, the rice husk boiler that has a capacity of 98.3 kW, greater than the value of designing that only 90 kW capacity of combustion and able to heat 190 kg of water within 35 minutes, so it can be used as a substitute of firewood boiler.
TURBO [Tulisan Riset Berbasis Online] Vol 6, No 2 (2017): Desember 2017
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (713.611 KB) | DOI: 10.24127/trb.v6i2.533


In the industrial center of kerupuk in Indramayu, drying kerupuk by using boiler is done if the weather conditions are cloudy or rainy. The kerupuk drying process uses the boiler by utilizing a steam pressure of 4 bar and passing it to the heat exchanger (hx) for heating air in the drying chamber. To achieve 4 bar pressure on the boiler takes a long time, about 3-4 hours duration so it is less effective in its use. If the steam working pressure on the boiler is reduced to 3 or 2 bar, it will likely save the drying time of the kerupuk. For that we need to test the process of drying kerupuk with pressure variations 2, 3 and 4 bars in order to know the difference in performance. In addition to variations of vapor pressure, the test is also carried out with variations in the direction of air flow to the position of the dried kerupuk, ie the position of vertikal direction and horizontal direction position but with the same pressure that is 4 bar. The test was carried out on a miniatur kerupuk dryer boiler with a design tailored to the conditions in the field. From the test results obtained the value of loss of drying (LOD) kerupuk at 4 bar pressure has a value of 46.4% and 43.8%, while at pressure 3 and 2 bar LOD values 38.4% and 31.1%. It can be said that the working pressure of 4 bar is indeed an effective pressure to be used in the process of drying the kerupuk. For the combustion efficiency of the boiler also, the pressure of 4 bar is higher when compared to the efficiency at 3 and 2 bar pressure. As for the direction of air flow, the direction of the vertikal position of the kerupuk more effectively used in the process of drying kerupuk compared the horizontal direction.Keywords: boiler, heat exchanger, loss of drying, efficiency.
The Effect of Climate Engineering on Strawberry Plant Growth in the Lowlands Aa Setiawan; Ahmad Maulana Kartika; Wardika Wardika
Jurnal Teknologi Terapan Vol 4, No 1 (2018): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1233.483 KB) | DOI: 10.31884/jtt.v4i1.82


This research aims to study the effect of climate engineering on the growth of strawberry plants in the lowlands. This research was conducted in greenhouse media of 6 m2 wide and 2 m high with roof cover and wall of ultraviolet plastic with roof damper using straw. Types of strawberry plants that will be used are varieties of strawberries (Alpine) Red and White Mixed. The planting medium of strawberries uses a polybag placed on the shelf. The analysis discussed in this research is the analysis of temperature and humidity attainment and growth and development of strawberries. Temperature and humidity attainment is indicated with fixed temperature and humidity data of 17 0C – 20 0C and 80% - 90% Rh under all conditions. Strawberry growth analysis is indicated by increasing stolon size while development is indicated by a change in fruit form.The results showed that the greenhouse room during the day only able to reach an average temperature of 22 0C and 70% moisture. While in the morning and afternoon greenhouse space is able to reach the temperature and humidity of strawberry habitat. Using temperatures and humidity under the design, strawberry plants are still alive and well developed which is indicated by the addition of stolon length, the appearance of new shoots, fruit ripening, and the addition of strawberries.
Jurnal Teknologi Terapan Vol 8, No 2 (2022): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v8i2.367


The mushroom cultivation process carried out by farmers is usually in a kumbung measuring 7 meters long, 5 meters wide, and about 3 meters high. According to farmers' confessions, during the dry season or when the weather is sunny (daytime conditions) the temperatur inside the kumbung is relatively high and can reach temperatures of up to 40 oC. These conditions are clearly not in accordance with the optimum conditions of mushroom growth, where the optimum temperature of the mushroom growth ranges from 30 oC - 35 oC. For this reason, it is necessary to apply an air conditioning system in the mushroom room so that its growth can be optimally as expected. The method used to cool the mushroom room is to use high-pressure spray cooling, where the cooling method of the spray cooling is to utilize the evaporative cooling principle of pressurized water spray with the help of a compressor. The water spray pressure in this test will be varied at 5 psi, 10 psi, and 15 psi. From the experiments that have been carried out, the results of the test at a pressure of 5 psi have the highest efficiency, which is about 19,2%, while at a pressure of 10 and 15 psi it has an efficiency of about 34,2 % and 38,7%, respectively. The average room temperature for a pressure of 5 psi is about 34.8 oC, while for a pressure of 10 and 15 psi each has an average room temperature of about 33.7 oC and 33,4 oC. Furthermore, the cost operational for the 5 , 10 , and 15 psi tests have values of about Rp 18.860,- Rp 29.741,- and Rp 40.662,- montly.