The factors that are affected by number of tubes in shell and tube heat exchanger is the rate of heat transfer and flow rate.
To passivate an exchanger gently pat the shell while whispering into a bleeder
the most effective way to do so is to reduce the flow of the heat exchanger
increase to heat transfer coefficent
It is difficult from cleaning point of view. Both end chambers have to be removed so as to clean the heat exchanger with odd nos of passes. Thanks & Regards Priyanka Karkera
double pipe heat exchanger is made if two concentric tubes one carrying cold flow and the other one carrying hot flow. but shell and tube hear exchangers are made of a shell like a vessel filled with many thin tubes to transfer heat between fluids. there are more data available at : http://scopewe.com/double-pipe-heat-exchanger-design-part-1/
To passivate an exchanger gently pat the shell while whispering into a bleeder
A heat exchanger with straight tubes in a shell that can normally be mechanically cleaned
It's the flat, flanged cover on the front (and sometimes the rear) of a shell & tube heat exchanger.
the most effective way to do so is to reduce the flow of the heat exchanger
**** you.......... pls somebody answer Double pipe heat exchanger consists of two concentric pipes of different diameters.One pipe is for hot fluid and another is for cold fluid.Both may have same flow direction(COCURRENT) and opposite direction(COUNTERCURRENT). Shell and tube heat exchanger consists of a shell in which large number of parallel tubes are present.One fluid hot or cold flow in shell and other hot or cold flow in the tubes. Also in case of shell & tube(S&T) the hot fluid will have more turbulence than in double pipe heat exchanger (HE) since there are no of tubes within a shell the area for convective heat transfer is considerably increased. so these are much more preferredTherefore the rate of heat transfer is greater in shell and tube because large surface area and enough contacting time
increase to heat transfer coefficent
It is difficult from cleaning point of view. Both end chambers have to be removed so as to clean the heat exchanger with odd nos of passes. Thanks & Regards Priyanka Karkera
phoot key nikal ley beta
double pipe heat exchanger is made if two concentric tubes one carrying cold flow and the other one carrying hot flow. but shell and tube hear exchangers are made of a shell like a vessel filled with many thin tubes to transfer heat between fluids. there are more data available at : http://scopewe.com/double-pipe-heat-exchanger-design-part-1/
it is difficult to remove the scales. we cannot use scale forming fluid through the shell because if we pass, the scales are formed and it corrodes the shell.
The hydro-testing procedure of a shell and tube heat exchanger requires you to fill the shell and tubing with water that had a color dye added to it. Then, raise the internal pressure by 1.5 times the operating pressure suggested by the manufacturer. If there are any cracks in the vessel, the water will be forced out through the cracks.
I'm just concluding a work in which I had to design a shell and tube exchanger for condensation of a mixture of gases and vapor at low pressure. That was the type I chose. AEM is a type of shell and tube heat exchanger, according to TEMA standards. They use 3 letters to describe the configuration of the heat exchanger. First letter refers to the front head, second letter to the shell type and third letter to the rear end stationary head. So in this case, with a type A you would have: A for channel and easily removable cover. E as it is a one pass shell and M because you have a fixed tubesheet with a rear end in bonnet shape.