Water Tank
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2022 ◽  
Vol 934 ◽  
G.-Y. Yuan ◽  
B.-Y. Ni ◽  
Q.-G. Wu ◽  
Y.-Z. Xue ◽  
D.-F. Han

Ice breaking has become one of the main problems faced by ships and other equipment operating in an ice-covered water region. New methods are always being pursued and studied to improve ice-breaking capabilities and efficiencies. Based on the strong damage capability, a high-speed water jet impact is proposed to be used to break an ice plate in contact with water. A series of experiments of water jet impacting ice were performed in a transparent water tank, where the water jets at tens of metres per second were generated by a home-made device and circular ice plates of various thicknesses and scales were produced in a cold room. The entire evolution of the water jet and ice was recorded by two high-speed cameras from the top and front views simultaneously. The focus was the responses of the ice plate, such as crack development and breakup, under the high-speed water jet loads, which involved compressible pressure ${P_1}$ and incompressible pressure ${P_2}$ . According to the main cause and crack development sequence, it was found that the damage of the ice could be roughly divided into five patterns. On this basis, the effects of water jet strength, ice thickness, ice plate size and boundary conditions were also investigated. Experiments validated the ice-breaking capability of the high-speed water jet, which could be a new auxiliary ice-breaking method in the future.

2022 ◽  
Vol 2160 (1) ◽  
pp. 012034
Haijun Zhou

Abstract The virtualization of the Festo process control teaching platform and the implementation process of extending it with real industry applications are introduced. Taking the heating process of the water tank as an example, the model extraction method of the real object is analyzed in detail, and the model identification problem of the low-order linear control object is solved. Through the introduction of the creation process of the object model on the virtual platform, a feasible way is pointed out for similar applications. On this basis, it is proposed to integrate the teaching platform with the specific industrial industry in the virtualized environment, broaden the breadth of process control teaching, and point out new ideas for building a teaching profession with industry support.

2022 ◽  
Vol 10 (1) ◽  
pp. 1-14
M. F. Zairul Fuaad ◽  
N. Razali ◽  
H. Hishamuddin ◽  
A. Jedi

2021 ◽  
Vol 23 (4) ◽  
pp. 315-318
Ajeevan Gautam ◽  
Rajib Chaulagain ◽  
Deepesh Dhungel

The lungs are the organs of respiration which are situated on either side of the heart and other mediastinal contents in its pleural cavity. A fresh lung is spongy, can float in water and crepitates when handled. Lungs are important with respect to its blood circulation. The lungs are divided by fissures into lobes which facilitate movements of lobes in relation to one another. The hilum of each lung is its gateway. In the present study, we aim to assess the morphological variations of human cadaveric lungs at Chitwan Medical College (CMC). An observational study was conducted at dissection hall of anatomy department at Chitwan Medical College from September 2019 to October 2020 after taking ethical approval form Institutional Review Committee of CMC. All the intact 70 lungs present in the department were studied. Photographs of the intact lungs were taken from different surface. The lungs were porus, highly elastic and spongy in texture. On keeping lungs to water tank it got floated. We found 34(80.96%) of the studied specimen of right side had horizontal fissure present in it. The remaining 8 (19.04%) specimens did not have horizontal fissures, while 3 (5.88%) specimens had incomplete fissures. The oblique fissure was not present in 2 (2.38%) of the study specimens. The left side of the study specimen has a variance of 1(4.16%). When the hilum right lung was examined, 40 (95.23%) of the structure had the usual organization pattern. In the left lung, the usual pattern of organization was 21(75%). The differences are thought to be present in the lung’s fissure and hilum. The current study’s findings are therapeutically important. The findings could prove beneficial to cardiovascular and thoracic surgeons.

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 206
Mingzhen Wang ◽  
Eric Hu ◽  
Lei Chen

Lowering the condensing temperature of the Refrigeration and Air-conditioning (RAC) system has been proven to effectively increase the system’s Coefficient of Performance (COP). This paper revolves around evaluating the energy-saving generated by applying a Thermal Diode Tank (TDT) in the RAC systems. The TDT is a novel invention, which is an insulated water tank equipped with gravity heat pipes. If the TDT was placed outdoors overnight, its inside water would theoretically be at the minimum ambient temperature of the previous night. When the TDT water is used to cool the condenser of RAC systems that operate during the daytime, a higher COP of this TDT assisted RAC (TDT-RAC) system could be achieved compared with the baseline system. In this study, a steady-state performance simulation model for TDT-RAC cycles has been developed. The model reveals that the COP of the TDT-RAC cycle can be improved by 10~59% over the baseline cycle depending on the compressor types. The TDT-RAC cycle with a variable speed compressor can save more energy than that with a fixed speed compressor. In addition, TDT-RAC cycles can save more energy with a higher day/night ambient temperature difference. There is a threshold tank size for a given TDT-RAC cycle to save energy, and the energy-saving can be improved by enlarging the tank size. A desk-top case study based on real weather data for Adelaide in January 2021 shows that 9~40% energy could be saved by TDT-RAC systems every summer day on average.

2021 ◽  
Vol 14 (2) ◽  
pp. 94-98
Mela Melarizki Rizki ◽  
Muchlisi Nalahuddin ◽  
Riza Muharni

In the Bukittinggi City Hospital building which has 6 floors, there is a water pump and a reservoir used to supply clean water for daily needs. Based on the reality in the field where there is no secondary data to determine the type of pump and reservoir. The purpose of this analysis is to obtain clean water discharge requirements, obtain the type of pump and ensure that the reservoir used for building C RSUD Kota Bukittinggi is in accordance with the type of pipe and reservoir installed in building C, floor 6. By using field studies and interviews and applying the formulas related to pump calculations. In determining the type of pump to be used in the building, it includes the required water discharge, determining the capacity of the components to be used such as pipe diameter, water tank capacity on the ground floor and roof of the building and the total head on the pipe. Based on the calculation results, the required water discharge is 0.08333 m 3 /min, the upper reservoir has a capacity of 150,000 liters, the bottom reservoir is 5,000 liters and the Hot that occurs is 18.429 m. Then the required pump specifications are 40 x 32B2 -51.5 Grundfos CM 10-3. The pump specifications are not much different from those that have been applied in the field.

S. Paramasivan ◽  
O.R. Sathyamoorthy ◽  
S. Sivagnanam ◽  
S. Rajathi ◽  
S.A. Sivakumar

Background: Teaching veterinary osteology and arthrology has been performed with free bones collected from various animals after processing and preserving them for long duration. The profession of teaching Anatomy to undergraduate and postgraduate students in veterinary colleges not only requires the knowledge on Veterinary Gross Anatomy but also the methods of preparation of specimen for laboratory use. This article explains the methods and steps in preparation of coloured skulls, bones of forelimb, hindlimb, rib cage, digits and whole mounted skeletons, to be used in the anatomy laboratory to increase the efficiency of both teaching and learning. Methods: A carcass of adult horse donated by a farmer was utilized for making complete coloured skeleton. The bones were collected from the carcass by natural maceration technique followed by cleaning with mild chemicals. The metallic paints and commonly available tools were used for colouring and mounting of horse skeleton. The parts of bones viz. process, fossa, articular area, foramen, the origin and insertion of various muscles were prepared with colours and labels on the surfaces of bones for teaching and museum purpose. The sequential step by step procedure for skeleton preparation in quickest possible time was standardized and explained using various tools. Result: The natural maceration in open water tank was found to be most effective way of maceration of carcasses for collection of bones with their normal colour. The bones were processed mainly with washing soap powder and calcium carbonate followed by drying in natural sunlight which increased the brightness of the bone without any damage to the structure. The coloured skulls, bones of forelimb, hindlimb, rib cage, digits and whole mounted skeletons were prepared with available tools and chemical as this work consumes less time and cost and increases the students’ learning efficiency, which will also be an asset and center of attraction for any Institution.

Badhan Saha ◽  
Mazharul Islam ◽  
Khondoker Nimul Islam ◽  
Jubair Naim ◽  
Md Shahriar Farabi

A small hydropower plant is an environment-friendly renewable energy technology. The run-of-river type gravitational water vortex turbine can be designed to produce electricity at sites with low water heads. In this study, an experimental investigation was undertaken on this type of turbine with a water tank and a runner which is connected to a shaft. At the end of the shaft, a rope brake was attached to measure the output power, torque and overall efficiency of the vortex turbine by varying flow rates. The designed vortex turbine can achieve an overall efficiency of . The experimental results were validated with available data in the literature and theories associated with the turbine. The results also showed that the flow rate plays a vital role in generating power, torque as well as overall efficiency. The project was completed using local resources and technologies. Moreover, as water is used as the input power, this project is eco-friendly which has no adverse effect on the environment.

2021 ◽  
Vol 33 (6) ◽  
pp. 1234-1247
Norimitsu Sakagami ◽  
Mizuho Shibata ◽  
Tomohiro Ueda ◽  
Kensei Ishizu ◽  
Kenshiro Yokoi ◽  

This report describes a numerical and experimental study of a posture control device based on a movable float for portable underwater robots. We numerically analyzed the static stability using a stability curve and allowable spatial range of a center-of-gravity shift caused by a payload shift or manipulator configuration. Further, we proposed a feedback controller based on direct pitch and roll signals to change and maintain robot posture. We tested the feedback control using a numerical simulator and conducted experiments in a water tank using two portable underwater robots to demonstrate the effectiveness of the movable float device and proposed controller. The results of the field experiments showed that the device and proposed controller can be employed for effective underwater operations of portable underwater robots.

2021 ◽  
Vol 10 (2) ◽  
pp. 338-349
R.A. Sri Martini ◽  
Erny Agusri ◽  
M. Nur Ridho Hasan

Rumah Sakit Bhayangkara Palembang mempunyai gedung utama baru dibangun dengan 4 lantai dengan luas bangunan ± 6102.52 m2 dan luas tanah 7538 m2 yang memiliki 173 tempat tidur inap, 45 toilet dan 369 pegawai. Pada bangunan gedung baru terdapat 3 sumber air yaitu panel tank fiberglass berkapasitas 40 m3, panel tank fiberglass berkapasitas 90 m3, dan roof tank berkapasitas 16 m3. Dengan penambahan gedung maka kebutuhan air pun meningkat, untuk memenuhi kebutuhan air operasional harian dan untuk sistem pemadam kebakaran sprinkler gedung utama baru. Tujuan penelitian ini untuk mengetahui jumlah air yang harus disediakan untuk operasioanl tersebut. Metode analisa dan pengolahan data yang digunakan dalam penelitian ini adalah metode analisis deskriptif dimana data yang ada dipisahkan dari data yang berbentuk angka baik dari data primer maupun data sekunder.  Analisa data meliputi: kebutuhan air bersih untuk operasional harian maksimumberdasarkan jumlah tempat tidur pasien (500 liter/bed/hari) jumlah pegawai rumah sakit (120 liter/orang/hari), jumlah toilet (39 liter/hari), wastafel (30 liter/hari), peturasan (30 liter/hari), shower (75 liter/hari), dan janitor (0.5 liter/m2/hr) dan kebutuhan air sistem pemadam kebakaran sprinkler. Dari hasil perhitungan didapat kebutuhan air bersih untuk operasional harian maksimum berjumlah 132.749 m3/hari dan kebutuhan air sistem pemadam kebakaran sprinkler berjumlah 992.358 m3 selama 30 menit sedangkan jumlah air bersih yang tersedia berjumlah 146 m3/hari. Dengan demikian dapat disimpulkan bahwa sumber air Rumah Sakit Bhayangkara Palembang hanya mampu memenuhi kebutuhan air operasional rumah sakit. Maka direncanakan volume kapasitas ground water tank sebesar 1120 m3.

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