จำนวน Repository ( 20 )

ความรู้ความเข้าใจและการมีส่วนร่วมในการประหยัดพลังงานไฟฟ้าของนักศึกษาและบุคลากร มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร
ความรู้ความเข้าใจและการมีส่วนร่วมในการประหยัดพลังงานไฟฟ้าของนักศึกษาและบุคลากร มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร

The study of the Knowledge and Participation in Saving Electric Energy of Students and Staffs at Rajamangala University of Technologh Phra Nakhon aimed to find out and compare the level of knowledge and participation in electric energy saving. The population consisted of 865 subjects. The questionairs are desiged for rating five scales check. The reference statistics for data analysis included frequency percentage arithematic mean standard deviation t-test and one way anova respectively.

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แบบจําลองการวิเคราะห์การไหลของกําลังไฟฟ้า
แบบจําลองการวิเคราะห์การไหลของกําลังไฟฟ้า

his project presents a power flow analysis model for the purpose of studying power flow in a power system model. At present electric power is an important factor driving the country both in industry and transportation. The demand for electric power tends to increase the production is insufficient to meet the demand. Therefore it is necessary to make the most of the energy resources available in the system. An effective system must be analyzed to detect possible errors. A sudden increase or decrease in load in the system may result in inadequate production and distribution efficiency. Therefore this project is presented for the analysis of power flow in a 3 bus 5 bus and 30 bus power system model using a math simulation program. It is divided into 3 case studies: Case 1 power flow under normal conditions Case 2 transmission line disconnection Case 3 adding distributed power generation sources.

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จักรยานออกกำลังกายผลิตไฟแบบ ON-GRID
จักรยานออกกำลังกายผลิตไฟแบบ ON-GRID

This Project presents electric bicycle. The structural feature is the use of the bicycle to be modified as it is designed to spin the rotor of the 5-phase magnetic line generator set and test the voltage distribution. The principle of operation of electric bicycles relies on the mechanical energy gained from cycling. The rotor consists of a series of permanent magnetic poles intersecting with a stator consisting of a set of conductor coils generating an AC voltage and converting it from AC to DC through a diode bridge to obtain DC voltage. To be connected to the boost converter to increase the output side pressure level to get the right voltage to charge a 12 volt battery. batteries. The test has been tested for cycling to generate electricity at a speed of 400 rpm while no-load has a voltage of 23.3 volt and with a load per load and at a speed of 400 rpm the voltage is 12.1 volt If the bicycle is cycled at an increased speed the voltage and current will increase. In order to transmit electric power to the single-phase power system an inverter is used to connect the single-phase power system to transmit to the single-phase power grid.

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การแปลงหน้าที่ทางคุณภาพเพื่อพัฒนาผลิตภัณฑ์ผลิตไฟฟ้าจากลมระบายความร้อนของเครื่องปรับอากาศ
การแปลงหน้าที่ทางคุณภาพเพื่อพัฒนาผลิตภัณฑ์ผลิตไฟฟ้าจากลมระบายความร้อนของเครื่องปรับอากาศ

This research had the objective to design and develop power production from daily life leftovers for their highest benefit of utilization by using the principle of quality function development and power generator that changed mechanical energy into electric energy. In developing electric generator product from air conditioner condensing unit the researcher found that there were 4 important factors including speed installation distance size and cross-sectional area of the fan and the test was conducted between 8.00-17.00 hours. The researcher collected the data and analyzed the test result and found that the best result in the test was to install the product at the distance of 10 cm by using an 18 fan in order to acquire the best voltage and the data were collected so that they could be implemented in developing such product in the future.

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การวิเคราะห์ศักยภาพพลังงานลมและข้อมูลลมรายปีบริเวณพื้นที่ อำเภอสะเมิง จังหวัดเชียงใหม่
การวิเคราะห์ศักยภาพพลังงานลมและข้อมูลลมรายปีบริเวณพื้นที่ อำเภอสะเมิง จังหวัดเชียงใหม่

In this study the wind speed characteristic and evaluation of wind power generation at Samoeng district Chiang Mai were investigated using wind speed data and wind direction data during time of January 2011 to December 2011 and measured at a height of 20 40 and 80 m above ground level. It was found that the mean wind speed of 3.8 3.92 and 4.30 m/s. While the mean wind direction of 20.73% and indicating from the southwest. The mean of power density of 107 W/m2 the shape parameter (k) was 1.715 1.633 and 1.783 scale parameter (c) of 3.649 3.651 and 4.092 m/s the mean of wind shear coefficient was 0.19. The evaluation of wind energy for electricity generation by install the wind turbine of Nordex N50 from Germany and Vestas V90 from Denmark were capacity of 800 kW and 3 MW. It could produce annual electricity of 1761379 kWh and 3772400 kWh and the capacity factor show 25.13% and 14.35% respectively. Finally the results showed the northern area of Thailand was suitable for wind power development in further.

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