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A vapor-compression refrigeration system, using Refrigerant 134a as the working fluid, has evaporator and condenser pressure of 1.4 bar and 12 bar, respectively. The refrigerant passes through each heat exchanger with a negligible pressure drop. At the inlet and exit of the compressor, the temperatures are -10 C and 80 C respectively. Thea heat transfer rate from the working fluid passing through the condenser is 15 kW. The saturated liquid exits the condenser at 12 bar. The compressor operates adiabatically.
A) What is the mass flow rate of the refrigerant in kg/s?
B) What is the compressor power input in kW?
Testing has shown that at a local race track (0.25 in length) racecars have a maximum side friction factor of 0.08. The smallest turn radius on the oval track is 150 feet and has a banking of 20 degrees.
A steel column has a total unbraced height of 14 ft and carries an axial LRFD load of 950 kips. The column ends are fixed. Select an economical HSS 14x14 for this column.
A force of 100 000 N is applied to a 10 mm x 20 mm rectangular cross-section iron bar in tension. If the iron has a yield strength of 400 MPa and a tensile strength of 480 MPa, determine: whether the bar will plastically deform
determine the elastic elongation that would be expected for a 16-mm-diameter rod of the same material if the rod were 1.6 m long and subjected to a tension force of 3.3 kN.
Comparison between steel structures and aluminium structures, To make a comparison between Eurocode 3 and Eurocode 9 outlining the main differences
a 50cm^3 sample of dry soil from an aquifer weighs 100g. when it is poured into a graduated cylinder, it displaces 35cm^3 of water. What is the porosity of the soil. What is the average density of the actual solids contained in the soil
Find the depth of a point below water surface in sea where pressure is 1.006 million N/m^2. (Specific gravity of sea water = 1.025)
A contractor is considering the purchase of an earthmover to avoid the cost of a rental unit. The earthmover costs $350,000 initially and will cost $7000 per year to store and maintain.
THE 2.5 MG VAN IS TRAVELLING WITH A SPEED OF 100KM/H WHEN THE BRAKES ARE APPLIED AND ALL 4 WHEELS LOCK. IF THE SPEED DECREASES TO 40KM/H IN 5S.
Consider a highway section where traffic is stationary, all trucks travel at speed s and cars at speed v. If aerial surveillance revealed that trucks were a fraction p of the vehicles on a photograph
Compare the reactor volume required to achieve 95% efficiency for Completely Mixed Flow Reactor (CMFR) and a Plug Flow Reactor (PFR) for the following conditions. steady-state, first-order reaction, flow rate = 14m3 / day.
Determine the force P required to move the wedge under the post. The coefficient of static friction between all surfaces is 0.25. The applied force F is 200 lbs and the angle alpha is 15 degrees.
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