Afuel oil is burned with air in a boiler furnace. the combustion produces 813 kw of thermal energy of which 65z5 is transferred as heat to the boiler tubes that pass through the furnace. the combustion products pass from the furnace to a stack at 650 deg c. liquid water enters the boiler tubes at 20 deg c and leaves the tubes as saturated steam at 20 bar absolute. (a) calculate the rate (kg/sec) at which steam is produced. (b) estimate the volumetric flow rate of steam produced (m^3/sec) using the steam tables. (c) repeat part (b) using the ideal gas law. which result would you trust more, and why? (d) what happened to the 35% of the combustion energy that did not get transferred to the boiler tubes?

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis

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)?