Brazed Heat Exchangers:
Brazed plate heat
exchangers play a vital role in today’s heat transfer
applications. First developed in the 1970’s for district
heating applications in Europe, brazed plates have evolved
into sophisticated heat exchangers that have been embraced
by the HVAC, Industrial and Refrigeration markets worldwide.
Early brazed plate heat exchangers were limited in materials
of construction (316 Stainless Steel plates & Copper (brazing)
and available in only a few executions. Today’s brazed
plates offer many options and configurations. Materials have
been expanded to higher grade Stainless Steel (SMO254) and
Nickel brazing alloys. Specialized models for dedicated
evaporators such as the ParaBrazed “E” series now exist.
These specialized heat exchangers have a fixed refrigerant
distributor built into the unit which improves operating
efficiency and stability, reducing the effects of
refrigerant mal-distribution. Other specialized models
include: double-wall, air dryer, dual circuit, high pressure
Nickel and wide-gap. The application of brazed plates has
exploded globally. With a standardoperating pressure of 450
psig, brazed technology has had a tremendous impact on
refrigeration applications as evaporators & condensers. The
high efficiency and small footprint of the brazed plate has
allowed manufactures of various refrigeration equipment to
re-scale their equipment. The technical and practical
advantages offered by brazed plates are tremendous. In the
HVAC sector, manufactures of boilers, radiant floor heating,
snow melt and instant water heating systems have all
capitalized on the ultra high efficiency and recovery
offered by today’s brazed plate heat exchangers.
Replacing bulky shell and tube, coiled,
coaxial and other less efficient heatexchangers, brazed
plates have allowed system designers not only to think
outside the box, but also to make the box smaller - pushing
the boundaries ofsystem design.