tubeID=(1/32)in coilDia=0.625in numCoils=13 tubeCSArea=(pi/4)*tubeID^2 to mm^2  = 0.495 mm^2 tubeLength=pi*coilDia*numCoils to mm  = 648.346 mm tubeIDCirc=pi*tubeID to mm  = 2.494 mm fluidSurfaceArea=tubeIDCirc*tubeLength  = 1616.741 mm^2 channelDia=0.75in   channelHeight=50mm channelSurfaceArea=pi*channelDia*channelHeight to mm^2  = 2992.367 mm^2