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In Chapter 3 we assumed that, whenever fins are attached to a base material, the base temperature is unchanged. What in fact happens is that, if the temperature of the base
(a) Assuming that the occupants' body heat provides a continuous source of 320 W within the igloo, calculate the inside air temperature when the outside air temperature is Too = -40 C. Be sure to consider heat losses through the floor of the igloo.
(b) Using the thermal circuit of part (a), perform a parameter sensitivity analysis to determine which variables have a significant effect on the inside air temperature. For instance, for very high wind con- ditions, the outside convection coefficient could double or even triple. Does it make sense to con- struct the igloo with walls half or twice as thick?
A hydraulic system is powered by a 9 kw motor and operates at 11 MPa. Assuming no losses, what is the flow rate through the system in units of m³/s?
Steam at 15 bar and 350 degrees C is expanded through a 50% reaction turbine to a pressure of 0.14 bar. The stage efficiency is 80% for each stage and the reheat factor is 1.05.
hydrogen at 25 bar 450degc enters an adiabatic turbine and expands to 2 bar 160degc with a mass flow rate of 0.2 kgs.
a bearing steel with 1.2 wt. c is analyzed for its microstructure after annealing heat treatment. a write down the
water is supplied steadily at 150 ft2s to a hydraulic turbine through a 3ft diamter inlet pipe and discharged through a
show how did you do the maintenance during your workshop machines were sent to your workshop from a big
what is metric chain
Determine the speed of sound at 20 degree C in (a) air, (b) helium, (c) methane. Answer in m/s. also determine the same, using a temperature of 40 degrees Celsius
consider the photovoltaic solar panel of example 3.3. the heat transfer coefficient should no longer be takento be a
Draft a designfor an activated sludge process operating as a CSTR based on the following Monod kinetic parameters
water flows from a storage tank through a horizontal 6-inch pipe cast iron and discharges water 20 degrees celsius into
in the reservoir of a supersonic wind tunnel the pressure and temperature of air are 10 atm and 320 k respectively.
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