Showing posts from 2018

Finally Carbon Dioxide can be Removed widely from Factories and Power Plants

A group of scientist finally find a way to capture and remove the carbon-dioxide gas significantly from industries and power plant gas that is releasing into atmosphere.
Scientists in Waterloo University created a powder that can capture the Carbon-di-Oxide (CO2) from industrial or power plant gas more efficiently than conventional way.
A chemical engineering professor at Waterloo University created a carbon dioxide capturing powder in Zhongwei Chen lab that can isolate Carbon Dioxide from gases that generally released into atmosphere from industries and significantly from power plant where fossil fuel is burnt.

What Is Carbon dioxide?Carbon Dioxide consists of Carbon and Oxygen atoms, chemical formula is CO2 or O=C=O, covalently double bonded to two oxygen atoms. Its chemical bond occurs naturally in atmosphere as a trace gas. Carbon dioxide is a colourless gas. 
Colour: Colourless Molar mass: 44.01 g/mol Formula: CO2 Triple point temperature: -56.6 °C Chem Spider ID: 274 Soluble in: Water Pub …

ক্যাপাসিটর এবং ব্যাটারির মধ্যে পার্থক্য কি?

ক্যাপাসিটর এবং ব্যাটারি উভয়ই চার্জ জমা করলেও পার্থক্য রয়েছে বেশ একটি ব্যাটারি বা একটি ক্যাপাসিটার উভয়ই চার্জ শক্তি স্টোরেজ উপাদান। কিন্তু, তারা সত্যিই একে অপর থেকে ভিন্ন।  
একটি ব্যাটারি রাসায়নিক-শক্তি আকারে শক্তি সঞ্চয় করে, যেখানে ক্যাপাসিটর ইলেকট্রস্ট্যাটিক ক্ষেত্র (field) ব্যবহার করে। 
একটি ব্যাটারি সাধারণত  শক্তির ঘনত্ব অনেক বেশি, যার অর্থ একক ঘনত্বে অনেক বেশি শক্তি সঞ্চয় করতে পারে। 
ক্যাপাসিটাররা যদিও অভ্যন্তরীণ প্রতিরোধ ক্ষমতার ক্ষেত্রে অধিক উচ্চতর হয়, যা স্বল্প সময়ের জন্য অনেক বেশি শক্তি সরবরাহ করতে পারে। 
একটি ব্যাটারি সাধারণত তার টার্মিনাল জুড়ে একটি ধ্রুবক (constant) ভোল্টেজ বজায় রাখে, এটি প্রায় সম্পূর্ণরূপে নির্গমন হয় যখন ভোল্টেজ ড্রপ হয়ে যায়। ক্যাপাসিটরে যেখানে মুহূর্তের মধ্যে ভোল্টেজ ড্রপ শুরু হয়। 
একটি ক্যাপাসিটর  ফিল্টারিং অ্যাপ্লিকেশনএর জন্য ব্যবহার করা যেতে পারে। 
একটি ব্যাটারি সবসময় একটি পোলারিটি থাকে। 
 অনুরুপ ভাবে, এই তালিকাটি আরও লম্বা করা যাবে, কিন্ত আমি এখানে থামাতে চাচ্ছি।

অবশ্য, সম্প্রতি  শক্তির উৎস হিসাবে সুপার-ক্যাপাসিটারগুলি ব্যবহার করা শুরু হয়েছ, …

Why Does Transformer Impedance Descrive in Percentage?

Descrive Why Does Transformer Impedance  Measured in PercentageThe rate impedance of a transformer is the voltage drop on full load because of the winding obstruction and spillage reactance communicated as a level of the evaluated voltage.
It is additionally the level of the typical terminal voltage at one side required to flow full-stack current under short out conditions on opposite side.
The impedance of a transformer majorly affects framework blame dimensions. It decides the most extreme estimation of current that will stream under blame conditions. 
It is anything but difficult to compute the most extreme current that a transformer can convey under symmetrical blame conditions. By method for instance, consider a 2 MVA transformer with an impedance of 5%. The most extreme blame dimension accessible on the auxiliary side is: 
2 MVA x 100/5 = 40 MVA 
also, from this figure, the proportional essential and auxiliary blame flows can be determined. 

A transformer with a lower impedance will p…


What Is Corona Effects in Electrical Energy Transmission Line?
If you look along the high voltage power transmission line in a clear sky night, you will observe a dreamiest violet glow phenomenon embedded hissing noise along the transmission line conductors. This indefinable phenomenon causes nothing but a production of ozone gas surrounding on overhead electrical energy transmission lines is known as Corona or corona effect.

Usually you will find noticeable corona effects in EHV or Extra High Voltage transmission lines, like- 230kV, 400kV or higher grading. You may discover corona effects on normal voltages line if line overloaded or carry overestimated loads.
Theory and History of  Mysterious CoronaThe mysterious corona factor equation was first derived by F.W. Peek and published in 1911. In a later a little modified from original the corona effect equation is published where he showed that the total amount of power loss in a wire due to the corona effect was equal to the equa…

Why Transformer Tap Changing is Required?

What is the Principal of Transformer Tap Changers?We will try to understand the principle of transformer tap changer andtry to find the answer of question- Can a transformer be tapped when it is on a load?Why is a tap changer used in an HV side?
A tap changer is a mechanism in transformers which allows for variable turn ratios to be selected in discrete steps. Transformers with this mechanism obtain this variable turn ratio by connecting to a number of access points known as taps along either the primary or secondary winding.
A tap is a connection point along a transformer winding that allows a certain number of turns to be selected. This means, a transformer with a variable turns ratio is produced, enabling voltage regulation of the output. The tap selection is made with a tap changer mechanism.

You may like to read another post about:

01. How do you know if a transformer is step up or step down?
02. What is the Function of Earthing or Grounding Transformer?

Can a transformer be tapped whe…

Freeze Protection Pro Cooling System

The freeze protection pro cooling system Solidifying or Freezing is one of most imperative vocabulary in cooling framework; because of solidifying in cooling framework liquid stream blocked, metallic channel broke, supplies cracked and so on, trouble happened. To keep nonstop sheltered and sound fluid stream solidify assurance then again against solidifying framework is required both in re-flowed water framework and shut circuit liquid cooler framework. Freeze protection for re-circulating water system: The least difficult and best method for keeping the re-flowed water from solidifying is to utilize a remote sump. With a remote sump, the re-coursing water pump is mounted remotely at the sump and at whatever point the pump is closed off, all re-flowing water channels back to the sump. 

Sponsored: In the event that a remote sump can't be utilized, dish radiators are accessible. Either electric radiators, boiling point water loops, steam curls or steam injectors might be utilized to wa…

How to Calculate Fuse Rating for Electrical Appliances?

Fuse Rating Calculating Guide
The function of a fuse is to break a circuit when a current threshold is exceeded. It’s a single function device, and historically single-use. Calculating the rating of very basic protection equipment fuse, we use the thump rule just select a fuse rated 150% - 200% of normal operating current of the specific circuit. But actually there are numerous calculations are involved for determining an appropriate fuse rating.Frequently necessary to consider other factors like- including ambient temperature, available energy during fault, inrush current, etc.
In order to select the proper rated fuse protective device, the following parameters and criteria need to be considered:
1.What is the normal operating current of the circuit? 2.What is the operating voltage? 3.Is the circuit AC or DC? 4.What is the operating ambient temperature? 5.What is the available short-circuit current? 6.What is the maximum allowable I²t? 7.Are there in-rush currents available? 8.Is the protecti…

HVDC Transmission and Distribution System Network

Transmission and Distribution of D.C. (Direct Current) PowerBy meaning of electrical power transmission and distribution is electrical energy generated in a central power station and carrying to the consumers end like- heavy industries, mill-factories, commercial zones, residential areas and so on through transmission and distribution transformers.  from the central
So far, there are two well known electric power transmission and distribution network system:

(i) By overhead system; or 
(ii) By underground system.

Overhead power transmission is suitable and cost economic for long distance and less populated or less obstructed rural or countryside area.

Underground power transmission is the easiest way to distribute electric line in city or dense populated area where overhead line construction is difficult. Comparing the overhead power transmission, underground power transmission system is more costly.
In over-head system, power isconveyed by bare conductors of copper or aluminium which are s…

List of ACSR Conductor Sizes as per ASTM Standard

ACSR (ALUMINUM CONDUCTORS STEEL REINFORCED)  Conductor Sizes and Specification List as per ASTM StandardNormally animals names are used to descrive the ACSR conductrs. It is used in only a few countries and has as usual no scientific or  any other background.
The animal names are a short-cut way of describing various  standardized overhead power distribution lines, as typically used by  utilities.
But people do get some ideas and Some one likely would try to  justify by saying that these are meant for line-men who won't be able to  remember the numbers but if you look at the list then you would realize  that for him to remember the names, he would have to be an expert in  lifesciences.
These nomenclatures are for easy reference and remembrance. Also there are different categories, as already mentioned, ACSR after animals, also to mention AAAC (All Aluminium Alloy) are named after plants (like- Oak, Hazel, Elm,...) AAC (All Aluminium) after insects (like- Butterfly, Wasp,... ) and so …