For Past so many days, missed my blogging instinct.
Now I’m back, with some spare time, lets start with Knowledge sharing!
Keep Reading & Smile
<p>The first step dorm designing a heat exchanger is to understand where it will be used for.</p>
<p>Application is most important criteria and mostly its input from client.</p>
<p>Application demands understanding of functionaries expected, duty needed, properties of both side fluids, system information e.g presuredrop expected, cleaning method of the equipment, hazard category, local laws pertaining to pressure vessel and hazard handling.
Some time the application demand ‘soft’ heat transfer due to the media e.g yeast cooler due to delicate yeast cells are always co-current type which lead to higher surface area and are more costly than counter current heat exchangers; but due to application those are designed that way.
Yup, just a brief on this subject.
Heat exchangers are devices used to transfer heat energy from one fluid to another, gas to gas or gas to liquid.
Typical heat exchangers are seen around in most unexpected location. From household appliances as air conditioners, refrigerator etc. Boilers and condensers in thermal power plants are examples of large industrial heat exchangers. There are heat exchangers in our automobiles in the form of radiators and oil coolers. Heat exchangers are also abundant in chemical and process industries.
Heatexchanger sizes varies from couple of square mm (heat sink in computer cpu) to length exceeding hundreads of square meters!
From simple study flow to complex flows.
Heat exchanges as they say “comes in all sizes and nearly for all duties”
We will, in my next post discuss about fundamental of heat exchangers.
If you Google the word you will get morecthan a billion results. That just shows how it closely associated to industry, to us.
But at the same time ut shows how wast the subject is.
The purpose of next few blows is to simplify your search by telling you what to ask and where to see.
Figures crossed 🙂
Past few months I was thinking of creating a post on heatexchangers. I think now is the time when i can write a bit on this subject.
There are numerous sites available which will explain verwell about this subject. But as usual they lack the subject matter. What we all are interested in. The core, the ‘how’s part of it.
In my next few pposts you fand this information.
Take care.
Good read for Project management performance analysis.
http://en.wikipedia.org/wiki/Earned_value_management
Keep reading!
B 31.3 is an ASME code for Process piping, Multiple time we come across situation, where we need to calculate the design pressure for a pipe.
In such cases, ASME VIII-Div-1 seems helpless, and B 31-3 comes for rescue.
Clause 304.1.2 talks about Straight pipe under internal pressure,
Where,
P > Internal design pressure
D > Outside diameter of pipe
S > Stress value of material as per table A-1
E > Quality factor from Table A-1A & -1B
Y > Coefficient from table 304.1.1
Compare equation 3a with ASME VIII-1 Formula (UG-27)
The formula is completely same, except factor PY against 0.6 P!
Y factor varies from material & Temperature, which varies from 0.4 to 0.7
As I’m working on one of the project, where I’m manually doing calculation, I thought this will be fastest way to share!
Keep reading!