Steam at 320 c flows in a cast iron pipe (k = 80 w/mk) whose inner and outer diameters are 5 cm and 5.5 cm respectively. the pipe is covered with 3 cm thick glass wool insulation with k = .05 w/m-k. heat is lost to the surrounding at 5 c by natural convection with heat transfer coefficient of 60 w/m^2-k. taking the heat transfer coefficient inside the pipe to be 18 w/m^2k, determine the rate of heat loss from the steam per unit length of the pipe. also determine the temperature drop across the pipe shell and the insulation.

What are the major differences between injection molding and extrusion?

In general, how do thermosetting plastics compare to thermoplastics in mechanical and physical properties?

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?