A modification to the perpendicular flow of the typical HCHE involves the replacement of shell with another coiled tube, allowing the two fluids to flow parallel to one another, and which requires the use of different design calculations. These are the Spiral Heat Exchangers (SHE), which may refer to a helical (coiled) tube configuration, more generally, the term refers to a pair of flat surfaces that are coiled to form the two channels in a counter-flow arrangement. Each of the two channels has one long curved path. A pair of fluid ports are connected tangentially to the outer arms of the spiral, and axial ports are common, but optional.
a modification to the perpendicular flow of the typical hche involves the replacement of shell with another coiled tube allowing the two fluids to flow parallel to one another and which requires the use of different design calculations these are the spiral heat exchangers (she) which may refer to a helical (coiled) tube configuration more generally the term refers to a pair of flat surfaces that are coiled to form the two channels in a counter-flow arrangement each of the two channels has one long curved path a pair of fluid ports are connected tangentially to the outer arms of the spiral and axial ports are common but optional