Other Types of Heat Exchangers

There are many other types of heat exchanger devices that can be used to heat the gas above the hydrate temperature. These could include shell and tube heat exchangers, electrical immersion heaters, furnaces, etc. However, the most common equipment type used to heat a well stream is the indirect fired water bath heater. 

Other types of heat-exchanger configurations not illustrated here are sometimes used. Curves for determining the value of F for these are presented in Ref. 11. These configurations include divided-flow and split-flow exchangers. 

In this chapter we studied the most commonly encountered heat exchangers, sometimes called recuperators. Two other types of heat exchangers, the regenerator and cooling tower, are also utilized, although much less frequently. In regenerators, the hot fluid and cold fluid successively occupy the same space, and the exchange of heat is... 

Other Types of Heat Exchangers 9.12.1 Trombone Coolers... 

There are still other types of heat exchanger however, we will limit the discussion to the three types mentioned. 

In a counterflow or countercurrent heat exchanger, hot and cold fluids enter the exchanger from opposite sides. The counterflow heat exchanger in Fig. 9.5 serves as a reference for all other heat exchanger configurations. A detailed analysis of this type of heat exchanger is therefore necessary. 

Other, more specific decisions are made in process design, including the actual choice of equipment (e.g., more than ten different types of heat exchangers are available) and the selection of construction materials of various process units. 

In these types of heat exchangers the two fluids are separated by the tube walls. As one fluid flows through the shell— the region outside the tubes — the other fluid flows through the tubes. Heat transfer occurs so as to cool, and perhaps even condense, the hotter fluid, and heat, and even vaporize, the cooler fluid. Heat exchangers are called by various names depending on their function such as chillers, condensers, coolers, heaters, reboilers, steam generators, vaporizes, waste heat boilers, and so on. 

The type of heat exchanger to be selected depends primarily on the type of fluids involved, the size and weight limitations, and the presence of any phase-change pmetsses, For example, a heat exchanger is suitable to cool a liquid by a gas it the surface area on the gas side is many limes that on the liquid side. On tile other hand, a plate or shell-and-tube heat exchanger is very suitable for cooling a liquid by another liquid. 

In practice, we encounter three types of heat exchangers, classified according to the flow of one fluid relative to that of the other. In a parallel-flow heat exchanger both fluids flow in the same direction in a counter-flow heat exchanger the fluids flow in opposite directions and in a cross-flow heat exchanger the fluids flow at right angles... 

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