Shell and Tube Heat Exchanger – the Heat Transfer Area Design Process

Abstract

Nowadays, the operating nuclear reactors are able to utilise only 1  of mined out uranium. An effective exploitation of uranium, even 60 , is possible to achieve in so-called fast reactors. These reactors commercial operation is expected after the year 2035. Several design configurations of these reactors exist. Fast reactors rank among the so-called Generation IV reactors. Helium-cooled reactor, as a gas-cooled fast reactor, is one of them. Exchangers used to a heat transfer from a reactor active zone (i.e. heat exchangers) are an important part of fast reactors. This paper deals with the design calculation of U-tube heat exchanger (precisely 1-2 shell and tube heat exchanger with U-tubes): water -helium.

Neural Networks - A Way to Increase the Fuel Efficiency of Vehicles

“…Based on ability to provide learned outputs for inputs in real time at low computational load may be used to solve complex problems, where the mathematical description of the process is difficult to describe, or is a great need for computing resources. The mathematical model using large computation power is used in papers [7][8][9]. Creating a mathematical model of the vehicle using neural network represents a new approach to modeling of the vehicle.…”

Geometrically Similar Rectangular Passive Micromixers and the Scaling Validity on Mixing Efficiency and Pressure Drops

“…Microfluidics research, micro devices with simple and integrated microchannels, chambers, valves and pumps However, the scaling effect on the chemical species mixing was not much explored in the passive micromixers. Scaling is important in upscaling of new technologies like heat exchangers and internal combustion engines [27,28]. In the current work, two geometrically similar rectangular passive micromixers designated as PDM-I and PDM-II were fabricated in Polydimethylsiloxane (PDMS) by conventional softlithography methods.…”

Suitability Assessment of Two Types of Heat Exchangers for High Temperature, Naturally Circulating Helium Cooling Loop

“…For this reason, the research of helium cooling loop systems is very topical. The research activities in the given area from several aspects are documented in the various publications, as for example [1,2,3,4,5,6,7,8,9,10].…”