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Heat exchanger for ammonia absorption refrigeration system?
there are two type of heat exchanger in absorption refrigeration, first is liquid heat exchanger and other is gas heat exchanger.both heat exchanger function is same, to transfer heat (hot medium to cold medium) without violate second newton law of thermodynamics. liquids heat exchanger is between boiler and absorber vessel mean while gas heat exchanger between evaporator and absorber.
What is the factors that effect on number of tubes in shell and tube heat exchanger?
The factors that are affected by number of tubes in shell and tube heat exchanger is the rate of heat transfer and flow rate.
What is the assumption to design heat exchanger?
The assumption to design heat exchanger is that it must be a shell and tube device. This device must allow the transfer of heat from one fluid to another without mixing the two fluids.
Why impingement baffle is introduced at the shell side inlet of a shell and tube heat exchanger?
increase to heat transfer coefficent
Why Air-conditioner become less efficient when it is dirty?
It can't transfer heat as efficiently when the exchanger is dirty.
What is the effect of overall heat transfer coefficient U to heat exchanger performance?
The equation for the duty of a heat exchanger is:Q=U*A*LMTDwhere:Q is the dutyA is the overall heat transfer areaLMTD is the log mean temperature difference.generally when desiging heat exchangers the desired duty is known, as are the desired inlet and outlet temperatures. Therefore we solve for A to find the overall heat transfer area.A= Q/(U*A*LMTD)If we hold Q and the LMTD constant, you can see that a larger overall heat transfer coefficient U, will result in a small exchanger area and, therefore; a smaller, less expensive piece of equipment.The the greater the U, the better the performance.
Explain the purpose of the heat exchanger in the nuclear power plant.?
The heat exchanger is the device built for efficient heat transfer from one medium to another, whether the media are in direct contact or the media are separated by a solid wall so that they never mix.
Explain the purpose of the heat exchanger in the nuclear power plant?
The heat exchanger is the device built for efficient heat transfer from one medium to another, whether the media are in direct contact or the media are separated by a solid wall so that they never mix.
What is microchannel heat exchangers?
A compact heat exchanger with a hydraulic diameter on the order of 1 mm or less. Flow is typically laminar and heat transfer coefficients are proportional to velocity.
What is the value of an overall heat transfer coefficient in an engine oil cooler?
I have a book (Introduction to heat transfer - Bergmann), there is an example of an oil cooler cooled by air (crossflow heat exchanger with both fluids unmixed). There is written: "... with an overall heat transfer coefficient of 53 W/(m²*K)."
What has the author Antony Johnson written?
Antony Johnson has written: 'Flow, heat transfer and pressure drop on the shell side of a shell and tube heat exchanger'
What is the difference between double pipe heat exchanger and shell and tube heat exchanger?
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/
