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1. A farmer runs a heat pump using 2 kW of power input. It keeps a chicken hatchery at a constant 30?C while the room loses 10 kW to the colder outside ambient air at 10?C. Find the COP of the heat pump, the rate of entropy generated in the heat pump and its heat exchangers, and the rate of entropy generated in the heat loss process.
2. An insulted cylinder/piston has an initial volume of 0.15 m3 and contains steam at 400 kPa, 200?C. The steam is expanded adiabatically, and the work output is measured very carefully to be 30 kJ. It is claimed that the final state of the water is in the two-phase (liquid and vapor) region. What is your evaluation of the claim?
Bike comes in many forms, each aimed at a particular sector of the market such as Sprint bikes and Mountain bikes - Use your judgement to identify the primary objective and the constraints that must be met for each of these
A well installed into a confined aquifer with a porosity of 0.3 and saturated thickness of 80 ft. The gravel pack requires a well screen slot width of 0.025 inches. The hydraulic conductivity of the aquifer is 60 ft/d.
The heat resisting alloy S-590 is used for a component that will be exposed to 700°C. With a safety factor of two on the time, determine the maximum static stress the component must sustain in order to have a service life of 10000 hours.
A cylindrical core, completely saturated with oil up to immobile water saturation, is immersed in water and the measured volume of oil displaced by imbibition of water is 7.5 c.c.
You are provided that a 33-year record of peak annual flow rates was subjected to a frequency analysis. You are interested in the median value. Thus, for part (a), what is the probability that the probability if the flow rate exceeds the median value..
A vertical parabolic curve is to be used as a sag curve, and it is desired to know the location and elevation of the low point. The curve is 750ft long , and the minus grade of 3.6 percent intersects the plus grade of 6.2 percent at station
Derive the vector equation for the acceleration of a particle in normal and tangental compontens. Begin with the velocity vector v=vut where v=ds/dt show all work including any convesion unit vectors.
A flow of 125,000 gallons per day enters a sedimentation basin which is 20 feet wide, 60 feet long and 12 feet deep. What is the minimum settling velocity of a particles that will be 100% removed by the basin
A certain fluid at 15 psia is contained in a cylinder behind a frictionless piston. The initial volume of the fluid is 300 in^3. The fluid expands to a volume of 450 in^3 while the pressure increases to 25 psia
The spillway for a dam is 20 m wide and is designed to carry 125 m3/s at flood stage. A 1:15 ratio model is constructed to study the flow characteristics through the spillway. The effects of surface tension and viscosity can be neglected.
If the drill bit jams when the brace is subjected to the forces shown, determine the resultant internal loadings acting on the cross section of the drill bit at A .
The soil below the footings consists of a medium grain sand (SP) and water is located at a depth of 5 feet below the ground surface. The preliminary structural plan calls for a 10 foot wide footing located at a depth of 5 feet which must support a..
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