a first manifold means having a central large cylindrical flow tube and a distributor means operably connected to said thermal exchange means at one edge so said flow tube is normal to and disposed tangentially to the longitudinal axes of said channels and arranged to fluidly communicate {HEAD ~ said channels} with {TAIL ~ said flow tube}; and 
a first manifold means having a central large cylindrical flow tube and a distributor means operably connected to said thermal exchange means at one edge so said flow tube is normal to and disposed tangentially to the longitudinal axes of said channels and arranged to fluidly communicate { HEAD ~ said channels } with { TAIL ~ said flow tube } ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH