There is a double tube exchanger, in which you have glycerin flowing in the inner tube at a rate of 2.5 Kg / s, it enters at a temperature of 600 ° C and it exits at a temperature of 100 ° C, and from the outside you have water which enters at a temperature of 20 ° C, at a rate of 1.0 Kg / s, if the resistance to total heat flow is 150 KW/m^2*K, determine the value of the conduction coefficient of the pipe, if the inner pipe it is nominal 1 1/2 "Schedule 80, and the outer piping is nominal 2" Schedule 80. The system is in parallel with flows large enough to neglect convection.