Brazed-Plate-Fin Heat Exchangers

Figure 14 Stainless steel brazed plate-fin heat exchanger. (Courtesy of Nordon.)...

Fig. 5.12. Several flow arrangements attainable with brazed plate-fin heat exchangers.

Compact brazed aluminum plate-fin heat exchangers can be used in most cryogenic hydrogen purification apphcations. The use of these relatively low cost heat exchangers, combined with low separation energy requirements, results in a highly economical process for hydrogen purification. 

Fig. 9. Plate heat exchangers (a) plate—frame heat exchanger when hot fluid from the heat source enters the heat exchanger through connections in the stationary frame plate and is channeled over one side of each plate. Cold fluid enters through different frame plate connections and flows on the other side of each plate in a direction opposite to the hot fluid direction. Courtesy of Bell Gosset. (b) Limco model 6502 plate—fin heat exchanger having compact plate—fin aluminum brazed liquid-to-aii construction. The brazed plate—fin construction provides the most efficient heat-exchanger system in terms of size,...

Alpema. The standards of the brazed aluminium plate-fin heat exchanger. Houston Association Alpema, 1994. 

Plate-fin heat exchangers are manufactured by assembling plates separated by corrugated sheets, which form the fins. The plates are made from aluminum sealed by brazing. The operation of these devices requires clean fluids. The main applications can be found in cryogenic and natural-gas liquefaction for pressures and temperatures up to 60 bars and 150°C. 

Robertson, J.M., Lovergrove, P.C., (1983), Boiling heat transfer with Freon 11 in brazed aluminum Plate-Fin Heat Exchangers, J. of Heat Transfer, 105... 

Design and Application Brazed plate heat exchangers have two design standards that are available. One is ALPEMA, the Brazed Aluminum Plate-Fin Heat Exchanger Manufacturers Association, and the other is the API 662 document for plate heat exchangers. 

Brazed Aluminium Plate-Fin Heat Exchanger Manufacturers Association (ALPEMA), The ALPEMA Standards, 2nd ed. (2000) available on-line at http //www.alpema.org/stand.htm, accessed 14 June 2007. 

The construction of a brazed aluminum plate-fin heat exchanger is illustrated in Figure 2 [4]. 

ALPEMA. The standards of the Brazed Aluminum Plate-Fin Heat Exchanger Manufacturers Assoeiation. Third edition 2010. 

Fig. S.IO. Exploded view of one layer of a typical plate-fin heat exchanger before brazing.

Table 5.4. Empirical Heat Transfer and Corresponding Pressure Drop Correlations for Brazed, Aluminum Plate-fin Heat Exchangers (To Match Present Vendor Specifications, Dimensions Are Also Given in Customary English Units)" ... 

Type of heat exchanger Plate and frame (gaskets) Fully welded plate (Alfarex) Brazed plate Spiral Brazed plate-fin Diffusion- bonded plate-fin Printed circuit Polymer (e.g. channel- plate) Chart-flo... 

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