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Two black square plates of size 2 by 2 m are placed parallel to each other at a distance of 0.5 m. One plate is maintained at a temperature of 1000oC and the other at 500oC. Find the heat exchange between the plates.
5 lbm of refrigerant 22 r-22 is contained in a piston cylinder device. the r-22 initially at a pressure of 30 psia and
An air standard dual cycle has a temperature and pressure at the beginning of compression of 60 F and 14 psi respectively. The specific heat addition to the cycle is 800 Btu/lbm. After the end of the constant volume part of the heat addition process ..
to test its performance an automobile is driven around a circular test track of diameter d. determine a the value of d
A small disk of diameter D1 = 50 mm and emissivity e1 = 0.6 is maintained at a temperature of T1 = 900 K. The disk is covered with a hemispherical radiation shield of the same diameter and an emissivity of e2 = 0.02 (both sides).
refrigerant-134a enters the evaporator coils placed at the back of the freezer section of a household refrigerator at
1. Briefly explain the concept of steady state as it applies to diffusion. 2. (a) Briefly explain the concept of a driving force.
An ideal Rankine cycle uses water as its working fluid. The mass flow rate of water through the cycle is 150 kg/s. saturated vapour enters the turbine at 15 MPa and saturated liquid enters the pump at 10 kPa. Cooling water passes through the condense..
predict the boiling heat-transfer coefficient for water under pressure boiling at 250 degrees f for a horizontal
Determine the smallest gauge of copper wire which must be used if the indicated maximum temperature is to be less than 202°C - Explain what is meant by 'the law of intermediate metals' relating to temperature measurement using thermocouples.
A square vertical plate measuring 0.25 m on each side is exposed on one side to air at 1 atm and 10 C. If the plate is held at a constant 286 C, what is the convective heat transfer?
consider steady heat transfer through a 5m x 6m brick wall of a house of thickness 30 cm. on a day when the temperature
a pump is used to supply water from a well to a municipal water system. at the well the water is 10oc at 0 kpa gage.
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