scholarly journals On the Sea Keeping Qualities of a Fishing Boat by Field Measurement-IX : The Correlation between Warp Tension and the Ship's Motions by the Difference of Fishing Methods

1985 ◽  
Vol 73 (0) ◽  
pp. 135-142
Author(s):  
Hideyuki NISHINOKUBI ◽  
Kiyoshi AMAGAI ◽  
Rihei KAWASHIMA
Keyword(s):  
Field Measurement ◽  
Fishing Boat ◽  
Warp Tension ◽  
The Difference

scholarly journals THE DESIGN OF 3 GT FISHING VESSELS USING DC ELECTRIC POWER AS DRIVING AND ELECTRICITY

2021 ◽  
Vol 16 (3) ◽  
pp. 329
Author(s):  
Bambang Sudjasta ◽  
Purwojoko Suranto ◽  
Donny Montreano ◽  
Reda Rizal
Keyword(s):  
Energy System ◽  
Water Area ◽  
Solar Panel ◽  
Solar Panels ◽  
Departure Point ◽  
Line Drawings ◽  
Fishing Boat ◽  
General Plan ◽  
Fishing Vessels ◽  
The Difference

The purpose of this study was to design a 3 Gross Tonnage (GT) fishing boat with a speed of 6 knots to obtain the shape and size of the vessel that is suitable for the water area that using the solar panel energy system. The ship was planned to travel about a maximum of 18 Km from the departure point. The steps of the research method for the design of fishing vessels include determining the principal size of the ship, making line drawings, drafting a general plan, construction design, ship tonnage capacity, electricity requirements, and then designing solar panel energy systems. This research resulted in a ship design with a length of 8 meters, 1.75 meters wide, and 1.3 meters high. Those specifications are used as constraints to determine the number of solar panels and batteries. To satisfy all of the goals, the 3 GT boat has limited 0.9KWh solar panels to travel for 9.7 NM (18 KM) at a speed of 6 knots, forcing daytime and night fishing fishermen to idle for 1 day. The difference is in the number of night fishing batteries that are 49% more than the daytime fishing which using 25 pcs 3.2V 100Ah. With the use of 51 pcs of battery, night fishing can move into daytime fishing so that it can fish more frequently than night fishing mode only

scholarly journals THE RESISTANCE ASPECT OF FISHING BOAT SKIPJACK POLE AND LINE

2021 ◽  
Vol 4 ◽  
pp. 1-7
Author(s):  
Wolter R Hetharia ◽  
Eliza R De Fretes ◽  
Reico H Siahainenia
Keyword(s):  
Model Test ◽  
Ship Design ◽  
Full Scale ◽  
Suitable Method ◽  
Design Phase ◽  
Towing Tank ◽  
Model Scale ◽  
Fishing Boat ◽  
Fishing Vessels ◽  
The Difference

The operation of fishing vessels skipjack pole and line contributes in catching tuna and skipjack fishes particularly in Indonesian waters. A previous study conducted by the authors found that there was no suitable method provided for the resistance computation atearly ship design phase. Besides, there was aninitial trim existed on the vessel during the operation which contributes for the resistance. The purpose of the study is to find the difference of resistance between the model test and the existing methods. The study was executed also to find the effect of initial trim of the vessel. The study began with collecting the database of a parent ship then to develop and transform into a model-scale for testing purpose in the towing tank. The results of model test were converted to the full-scale vessel. The resistance of full-scale vessel was computed based on the Holtrop and Guldhammer methods. The result of full-of resistance obtained from the model test and the methods were collected, evaluated and compared. The results showed the difference of the resistance for all methods. The result of model test is greater 21 % than that of Holtrop method at the service speed of 10 knots. Meanwhile, the result of model test is lower 14 % than that of Gulhammer method at the same speed. In addition, at the speed of 10 knots the initial trim of 0.5O increase 5 % ofthe resistance, the initial trim of 1O increase 10 % of resistance and the initial trim of 2O increase 16 % of resistance compared to the vesselwithout initial trim. In conclusion, the existing resistance methods are not suitable to be applied for skipjack pole and line fishing vessels. In addition, the initial trim contributes to increase the resistance and should be avoided during the vessel operation.

Influence of Summer Outdoor Pedestrian Wind Environment Comfort with Height-to-Width Ratios of Arcade in Taiwan

2016 ◽  
Vol 851 ◽  
pp. 633-638 ◽  
Author(s):  
Ying Ming Su ◽  
Hui Ting Chang
Keyword(s):  
Air Temperature ◽  
Field Measurement ◽  
Comfort Level ◽  
Width Ratio ◽  
Wind Environment ◽  
Global Trends ◽  
Measurement Result ◽  
Anal Ysis ◽  
The Difference ◽  
Wind Comfort

Arcade, a regional architecture style in Taiwan, is gradually replaced by sidewalk with the prevailing global trends of architecture design, thereby bringing greater challenges to pedestrians comfort. Past researches suggest optimal urban wind regime can mitigate heat island effect and enhance pedestrians comfort level. Therefore, the relationship between arcade and pedestrian wind comfort as well as the influence of arcade’s height-to-width ratios (H/W) on urban wind environment are worth a thorough research. This study takes Farglory Kyoto Community as the example. Arcades in three varied sizes are compared: In Case 1, height-to-width ratio (H/W) =1.25; Case 2(H/W=1.54); Case 3(H/W=0.75). In Aug 2016, field measurement was conducted comparable anal++ysis on outdoor environmental comfort. The field measurement result indicates that, wind environment is more stable for arcade than sidewalk, and that air temperature of arcade is 3.9 °C lower than sidewalk, thereby concluding arcade tends to generate more pedestrian wind comfort in summer. The measurement result of Thermo GEAR G100EXD suggests, during the hottest time at noon, the difference between air temperature on sidewalk and on arcade reaches 8 °C. This study also proves that in subtropical climates, arcade is more likely to provide pedestrians with higher comfort level, and that air temperature on arcade is 3.9°C lower than outdoors. The lower the height-to-width ratio is, the more comfortable the environment appears to be.

scholarly journals Akurasi Citra Data Foto Udara UAV Quadcopter Persimpangan Lalu Lintas Kota Kendari

2020 ◽  
Vol 14 (1) ◽  
pp. 51-59
Author(s):  
La Ode M. Nurrakhmad Arsyad ◽  
◽  
Statiswaty Statiswaty ◽  
Laode M. Iradat ◽  
◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Field Measurement ◽  
Highway Traffic ◽  
Mapping Accuracy ◽  
Field Surveys ◽  
Accuracy Test ◽  
Measurement Results ◽  
Aerial Vehicle ◽  
The Difference ◽  
Field Planning

The use of the Unnamed Aerial Vehicle (UAV) called “Drone” has been widely used in various areas of planning, one of them by mapping the highway traffic junction. The range of remote roaming, adjustable spatial resolution greatly gives flexibility in the effectiveness of field surveys. The mapping accuracy test conducted on 7 (seven) Unsignaling junction in Kendari City by Omisi and Komisi Equation method gives significant output and quite accurate to serve as further planning data. The difference between image and field measurement results, obtained accuracy of 96%, so that the use of UAV in supporting mapping, survey and field planning still prioritize effectiveness and accuracy of the measurement.

scholarly journals KINERJA LPG PADA MOTOR BAKAR 6,5 HP SEBAGAI BAHAN BAKAR ALTERNATIF PERAHU PENANGKAP IKAN (Performance of Liquefied Petroleum Gas for 6,5 HP Engine as an Alternative Fuel in Small Motorized Fishing Boat)

2016 ◽  
Vol 5 (1) ◽  
pp. 13
Author(s):  
Bagus Baruno ◽  
Budhi H. Iskandar ◽  
Mohammad Imron ◽  
Wazir Mawardi
Keyword(s):  
Fuel Consumption ◽  
Cost Savings ◽  
Cost Benefit ◽  
Alternative Fuel ◽  
Specific Fuel Consumption ◽  
Liquefied Petroleum Gas ◽  
Exhaust Temperature ◽  
Fishing Boat ◽  
The Difference ◽  
The Cost

<p>ABSTRACT<br />This research was to analyze the technical effect of LPG compared to the gasoline by<br />measuring the engine and exhaust temperature, to calculate the fuel saving (efficiency) for a single<br />trip by measuring the specific fuel consumption, and to explicate the cost benefit from the use of<br />LPG compared to the gasoline for fishing operation. During the experimental test, the engine speed<br />was maintained at idling conditions of 1600, 2000, and 2500rev/min. Technically, the engine and<br />exhaust temperature decrease when running on LPG. The use of LPG as an alternative fuel to<br />gasoline can save on fuel consumption up to 26,35% and LPG makes operational cost more<br />efficiently due to the lower value of FC than that of gasoline. For a single trip, the cost from LPG<br />specific fuel consumption (sfc) value resulted Rp 5.610 while the gasoline resulted higher value<br />which makes Rp 9.632. With the difference of Rp 4.022, LPG can save cost as much as 41,76%<br />where cost savings in fuel expenditure can be used to reimburse the purchasing cost of converter<br />kit for 41,5 months or 3,46 years.</p><p><br />Key words: efficiency, fuel consumption, Liquefied Peltroleum Gas (LPG), temperature</p><p>-------</p><p><br />ABSTRAK</p><p>Penelitian bertujuan untuk menentukan secara teknis pengaruh penggunaan LPG<br />dibandingkan bensin premium pada motor bensin 6,5 HP, menghitung penghematan (efisiensi)<br />yang dapat dicapai dari penggunaan LPG dibandingkan bensin premium dalam satu kali operasi<br />penangkapan ikan dan menghitung keuntungan dari penggunaan LPG secara biaya dibandingkan<br />dengan bensin premium untuk kegiatan operasional penangkapan ikan. Selama uji coba motor<br />dioperasikan menggunakan bahan bakar bensin dan LPG secara bergantian dengan putaran 1600,<br />2000 dan 2500 rpm. Hasil penelitian menunjukkan bahwa penggunaan LPG secara teknis dapat<br />mereduksi suhu permukaan mesin, suhu gas buang dan konsumsi bahan bakar dibandingkan<br />motor yang dioperasikan menggunakan bensin premium. Selain itu rata-rata konsumsi bahan<br />bakar menjadi lebih hemat sebanyak 26,35% sehingga biaya operasional menjadi lebih efisien.<br />Dalam satu kali operasi penangkapan ikan didapat nilai spesific fuel consumption (sfc) LPG<br />sebesar Rp. 5.610 sedangkan nilai sfc bensin adalah sebesar Rp. 9.632. Dengan selisih sebanyak<br />Rp. 4.022 maka LPG bisa menghemat biaya sebanyak 41,76% dimana penghematan biaya<br />belanja bahan bakar dapat digunakan untuk mengembalikan biaya pembelian converter kit selama<br />41,5 bulan atau 3,46 tahun.</p><p><br />Kata kunci: efisiensi, konsumsi bahan bakar, Liquefied Petroleum Gas (LPG), suhu</p>

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