Jurnal Teknik Mesin
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Uji Pengaruh Sudut Kemiringan Kolektor Terhadap Distribusi Temperatur
Get PDFAceh province is geographically located between 20- 60 LU and 950- 980 BT is a tropical region that has a high enough intensity of the sun. Solar energy is a potential energy source, so it needs to consider aspects of the benefits brought about by the sun. This study aims to examine the variation of the solar collector tilt angle to get the collector with optimum results. The material used is wood frame with insulating material zinc in black paint. Temperature measurements carried out in an open space with solar energy as a source of energy for heating. Measurements were taken from 09.00 am - 17.00 pm with measurements every hour. Thermometer was used to measure the temperature, where the measurement is made by 4 (four) points in each space of collector. The results showed that the distribution of the average temperature for the collector tilt angle of 150 C with the air flow rate 0.028 kg/ s is 80 C, the average temperature difference for collector tilt angle of 300 C with the air flow rate 0.0237 kg / s is 170 C, while the average temperature for the collector tilt angle of 450 with the air flow rate 0.0175 kg/ s is 19.50 C
Pengaruh Penghambatan Kebeningan Kaca Terhadap Kemampuan Transfer Intensitas Cahaya Pada Kaca
Get PDFThe sun is the primary source of energy on the earth, but its light sometimes cause thermal discomfort for humans. The thermal engineering started one in the automotive sector in particular car is to install the air conditioner to lower the temperature of the cabin and use the tranfer window film to block sun light intensity. Testing the proper use of window film to determine the effect of inhibition of the ability to transfer the glass clarity of light intensity on the glass needs to be done to determine what percentage inhibition that has the intensity and the lower the cabin temperature, so the thermal comfort is achieved faster. From the results of the testing were conditioned using Solar ray Collector PHYWE Systeme GmbH CO.KG. Inhibition obtained with 40% glass has an intensity of 39% and a temperature of 63.20 C, the glass has an intensity of 60% inhibition of 21% and a temperature of 61.90 C, the glass has an intensity of 80% inhibition of 8% and a temperature of 63.80 C. So the use of glass with 60% inhibition is best to accelerate the thermal comfort is achieved
Analisis Konvervasi Energi Pada Unit Heat Recovery Steam Generator dan Unit Boil-Off Gas Kilang PT. Arun
Get PDFThe result of this analysist of energy conservation activity exposes the performance generated by PT. Arun NGL in the fields of energy conservation and decrease of greenhouse emissions. The implementtion analysist activities assosieted with international initiatives in addressing climate change, and global warming as well as support the implementation of goverment programs of energy conservation programs and the reduction of greenhouse gas emmisions in the industrial sector. All the data presented in this report have been checked carefully, and all sizes are displayed also was referring to an internationally recognized measurement technique in the industry. Thus, the accurancy of the data included in this report both with regards the level of error is small. In addition, all the data loaded can be trusted because it is supported by the documents that existand can be verified by the stakeholders who want to do this. Based on the result of the assessment, energy saving opportunities and reduction of exhaust gas emmisions are available by empowering, improvise and optimize prodution units. Implementation efforts on energy conservation and the utilization of resources has been implementaed since 1997, which was market by the implementation of the project Marine Boil off Gas (MaBOG) take back the exhaust gas at the time of shipment of LNG (800-1,000 M3 LNG). Marine Boil off Gas has recover 1000 m3 of LNG per shipment in 2003, in installation of heat reovery unit 10 steam generator, which utilizes the thermal energy of the stack gas turbines to generate steam, and turn off or not utilize all the conventional boilers
Kemampuan Dinding Kaca dalam Mentransferkan Intensitas Cahaya yang Melewati Dinding Kaca
Get PDFThe sun transfers heat energy to the earth with radiation mode. To reach the air temperature with thermal comfort in the indoor air temperature then need to re-view using AC, but if the energy intensity of the sun's too much that goes into the conditioning room through a glass wall that will cause the AC is too big. This will lead to the use of electrical energy is too wasteful. To minimize the AC in the room caused by a number of incoming solar radiation intensity of heat is done by using a glass inhibitory properties of low light intensity. The purpose of this study was to determine the extent of the inhibitory effect of light intensity into the room by each type of glass. The research was done by varying the type of glass that will be mounted on the solar collector, rain glass, blue glass, black glass, One way glass, glass orange. Measurement of light intensity and temperature data were taken every 30 minutes within a period of 3 hours. Based on the results of the study five types of glass is the importance of the election of the best level of inhibition glass is types of glass One way because the light intensity 400 W/m2 - 500 W/m2, resulting in room temperature is 45 0C
Analisis Kenyamanan Thermal Pada Ruang Pendaftaran Pasien Gedung RSUD Meuraxa Banda Aceh
No full textThe improvement status of RSUD Meuraxa from non referral to full service and equipped hospital brought several implications to the hospital services particularly in dealing with the increase of patients. The increasing flow of patients in line results in the escalation of the room temperature. The condition was affected by thermal inconveniency caused by direct thermal radiation from the sun, embedded and congenital metabolism of patients (Met), patient clothing insulation (Clo), room equipments and room air circulation. The phenomena affect human performance in their activities. To maintain its status as a general hospital, the impaired condition should be addressed by knowing first the source of the cause. Several measures are normally conducted through direct assessment of the room thermal condition involving the temperature measurement, relative humidity, rate of air flow, and sun ray intensity. Based on the measurement and analysis, it is found that the increase in the rooms occupation has resulted in average increase of room temperature and relative humidity of 30C and 2%, respectively.Themaximum indoor temperature reached 360 while the minimum humidity was 44%. The average indoor air flow rate was less than 1 m/s. It is suggested that one possible solution to improve the thermal inconvenience on the room is by installing the air blower to improve the air circulation of the room
Pemanfaatan Boil-Off Gas Sebagai Bahan Bakar Kapal Pengangkut Gas
Get PDFLNG carrier is the most reliable primary means of transportation of LNG in the world.In operation, each LNG carrier would result in boil-off gas from the cargo hold due to the expansion.BOG The average amount that can be produced is 0.15% of the tank capacity and unloading space per day.For that, there is great opportunity in the use of BOG as fuel in LNG carrier resulting in fuel savings.One of the driving forces that can take advantage of BOG is a Combined Cycle Propulsion Plant (CCPP) of a gas turbine and a steam turbine, a gas turbine with HRSG and dual fuel technology for generating thermal energy from the exhaust gas of gas turbines.Improved efficiency and are able to use as fuel BOG will be able to lower the fuel oil consumption of the driving force.The study was conducted by comparing the fuel consumption of LNG carrier propulsion system with a conventional steam turbines, compared to the LNG carrier using the CCPP.CCPP eventually be an option with the highest fuel economy both in terms of BOG utilization, efficiency and fuel use.For the 138,000 m3 LNG carrier of the same, with the CCPP do MDO-fueled fuel savings of U.S. 56,472.70 per day
Pembuatan Sistem Penghitung Kecepatan Mobil Listrik Teknik Mesin Unsyiah Berbasis Mikrokontroler Atmega 8535
Get PDFSpeed measurement equipment is very essential in a vehicle. The speed measurement equipment engineered in this research is specially designed for the electric vehicle of Mechanical Engineering, Syiah Kuala University, which is equipped with microcontroller of atmega 8353. The sensor system utilized is a dc generator which is connected to the front wheel of the electric car. The rotation of the wheel causes the generator to rotate that the generator produces dc electric voltage that the voltage is sent to the microcontroller. In general there are two main base components used for speed measurement equipment which are hardware and software. The software used to support the programming of the equipment is code vision AVR. The reading of input signal, processing and the visual display are designed with code vision AVR programming and c programming language. The test was conducted at the wheel of the vehicle with several steps of rotation speed to know the speed of the vehicle in rpm and convert it into km/hour by calibrating it based on the wheel diameter. The speed data is displayed on an LCD in real time that the driver knows the real speed
Kaji Eksperimental Perpindahan Kalor Pada Sistem Lemari Penyimpan Darah
Get PDFBlood is the fluid found in all living things serve to transmit substances and oxygen needed by body tissues, carrying chemical products of metabolism, as well as the body's defense against viruses or bacteria. If blood will be donated to another person, the blood will be stored in a blood bag and should be used immediately to the recipient blood. If it is not used directly as they are not needed or should be taken to another place, it must be kept comfortable. Because storage temperature greatly affects the quality of the blood and age of stored blood. Blood storage temperature range from 1 oC to 6 oC, for this reason, it is necessary that both the thermal insulation material storage chamber walls of blood to maintain the desired temperature. Insulation materials used with the value of thermal conductivity (k) is low styrofoam. The purpose of this study was to obtain a blood storage closet systems portable lightweight and easily moveable.
Kaji Eksperimental Kehilangan Panas pada Dinding Ruang Bakar Fluidisasi Berbahan Bakar Biomassa
Get PDFBiomass has several advantages, especially as it is renewable in nature. The low energy content owned by biomass requires the use of effective techniques, such as gasification. This research was to determine the rate of heat transfer that occurs in the burning of fuel in the combustion chamber fluidized types. The benefit of this research is to identify the heat loss in biomass combustion system. The fuels used in this study are wood-planed chips, branches of dry wood and areca nut husk. The size of fuel was 2 to 3 mm. The fuel was weighed to 2 kgs for one testing/biomass. The combustion duration was 50 seconds. The heat loss in biomass combustors with wood-planed chips occurred in 30 seconds at Tf 724oC and TW 203 oC, the heat loss was 26813.33 W/m. The heat loss in the combustion chamber with biomass wood-planed chips in 15 seconds at Tf-average 334 oC and Tw 44 oC, the heat loss was 2947.03 W/m. The heat loss in biomass combustors with branches of dry wood in 30 seconds at Tf 713 oC and Tw 201 oC, the heat loss was 26350.15 W/m. The heat loss in the combustion chamber with branches of dry wood biomass in 20 seconds at Tf-average 286 oC and Tw 42 oC, the heat loss was 2479.57 W/m. The heat loss in biomass combustors with areca nut husk occurred in 20 seconds at Tf 515 oC and Tw 137 oC, the heat loss was 19453.82 W/m. The heat loss in the combustion chamber with areca nut husk biomass occurred in 15 seconds at Tf- average 118 oC and Tw 39 oC, the heat loss was 802.81 W/m
Kajian Eksperimental Pembakaran Biomassa pada Ruang Bakar Fluidisasi
Get PDFCombustion of biomass produces thermal energy that can be utilized of other energy utilities by conversion through fluidized combustion systems. Fluidized reactor with a system (fluidized bed) is an option to the existing conversion thermal energy in biomass. Fuel feed system on combustion chamber (combustor) and fluidized combustion reaction chamber (burner) at fluidization reactor unit integrated with utility boilers producing steam into the reactor performance targets, this is achieved by the provision of fuel to the prescribed amount and timeliness of feeder working system for supplying fuel to the combustion chamber (combustor). Maximum combustion temperature results obtained in between 20 to 30 seconds burning time for 2 (two) kg biomass. Combustion temperature is strongly influenced by the characteristics of biomass. Solid biomass character (wood chips and branches of dry wood planers) has a higher burning temperature of biomass fibers character (areca nut husk). The increase in temperature results for biomass combustion filamentous more quickly reach peak combustion temperature, the comparison is time for biomass burning wood character requires 30 seconds burning time , while for areca nut husk biomass only takes 20 seconds burning time for 2 kg of biomass