Written in English
|Statement||by Song-Lin Yang.|
|The Physical Object|
|Pagination||xiv, 125 leaves :|
|Number of Pages||125|
CHAPTER VII CONCLUSIONS AND RECOMMENDATIONS A numerical solution is given for studying the flow and heat transfer in a single-pass, return-flow heat exchanger. Stream function and vorticity are used in the formulation, and the original irregular geometry of the exchanger in the physical plane is transformed into a rectangular domain with square grids in a computational plane. Overall Heat Transfer Coefficient Convection Heat Transfer Summary RADIANT HEAT TRANSFER Thermal Radiation Black Body Radiation Emissivity Radiation Configuration Factor Summary HEAT EXCHANGERS Heat Exchangers Parallel and Counter-Flow Designs Non-Regenerative Heat Exchanger Regenerative Heat Exchanger Cooling Towers Log Mean. type of heat exchanger consists of two concentric pipes of different diameters, as shown in Figure , called the double-pipe heat exchanger. One fluid in a double-pipe heat exchanger flows through the smaller pipe while the other fluid flows through the annular space between the two pipes. Two types of flow arrangement are possible in a. EO DIFFERENTIATE between the following types of heat exchangers: a. Single-pass versus multi-pass heat exchangers b. Regenerative versus non-regenerative heat exchangers. Introduction. A heat exchanger is a component that allows the transfer of heat from one fluid (liquid or gas) to another fluid. Reasons for heat transfer include the.
Heat Transfer Coefficients. The evaluation of the overall heat transfer coefficient is an important part of the thermal design and analysis of a heat exchanger. You’ll find several tables of typical overall heat transfer coefficients in shell-and-tube heat exchangers in Chapter 11 of Perry’s Handbook. The following. A heat exchanger can have several different flow patterns. Crossflow, parallel flow, and counterflow heat exchanger configurations are three examples. A counterflow heat exchanger will require less heat exchange surface area than a parallel flow heat exchanger for the same heat transfer rate and the same inlet and outlet temperatures for the fluids. 5 Heat Exchangers The general function of a heat exchanger is to transfer heat from one fluid to another. The basic component of a heat exchanger can be viewed as a tube with one fluid running through it and another fluid flowing by on the outside. The rate of heat transfer per unit surface of a heat Exchanger W/ m 2: Individual Heat transfer Coefficient: The heat flux per unit temperature difference across Heat transfer boundary layer of the hot / cold fluid film formed at the heat transfer surface. The magnitude of heat transfer coefficient indicates the ability of heat conductivity of.
Heat-transfer factors Efficienc of a counter-flow heat exchangey r Parallel -flow heafc exchangers Double-pass and cross-flow exchanger, multi-pass s Mea n temperatur e differenc for flow i a pip with th wall at uniform temperatur 12e # 1 Mean temperature differenc fore a counter-flow heat exchanger Listed in Table 1 are some of the main dimensions of the heat exchanger. Fig. 2 is a photograph of the heat exchanger experimental setup (showing both the horizontal and vertical heat exchangers). Fig. 3 is a screen shot from the LabVIEW software used for data acquisition, monitoring and control in the laboratory. With steam in the shell side and cold water in the tubes, thermocouple. Most shell-and-tube heat exchangers are either 1, 2, or 4 pass designs on the tube side. This refers to the number of times the fluid in the tubes passes through the fluid in the shell. In a single pass heat exchanger, the fluid goes in one end of each tube and out the other. A HX is a heat transfer device that exchanges heat between two or more process fluids, at different temperatures, and in thermal contact,,. In HXs, heat transfer takes place from a high-temperature fluid to a low-temperature fluid. Usually, the phase of the fluids is not changed during the heat transfer.