(a) calculate the heat flux (in w/m2) through a sheet of a metal 12 mm thick if the temperatures at the two faces are 310 and 130 ˚c. assume steady-state heat flow and that the thermal conductivity of this metal is 51.1 w/m·k.(b) what is the heat loss per hour if the area of the sheet is 0.28 m2? (c) what will be the heat loss per hour if a material with a thermal conductivity of 1.1 w/m·k is used? (d) calculate the heat loss per hour if the first metal is used and the thickness is increased to 21 mm.(a) /m2( j/h(c) /h( j/h

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.

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)?