A nozzle receives 36 kg/s of air at a speed of 142 m/s and with an enthalpy of 1060.00 kJ/kg. Air leaves the nozzle with an enthalpy of 730 kJ/kg. Assuming air behaves as ideal gas, determine the exit velocity from the nozzle for a) an adiabatic flow, b) a flow where the heat loss rate is 540 kW.

A solar collector panel with a surface area of 2.97 m2 . The panelreceives energy from the sun at a rate of 1.5 kW. Thirty-sixpercent of the incoming energy is lost to the surroundings. Theremainder is used to heat liquid water from 40°C to 60°C. Thewater passes through the solar collector with a negligiblepressure drop. Neglecting kinetic and potential energy effects,determine at steady state the mass flow rate of water, in kg.How many gallons of water at 60°C can eight collectors provide in a 20-min time period?

Problem 4: Consider the following schematic of a simple turbojet engine model that uses air as its working fluid. With the data given determine (A) the pressure and temperature of all five states, (B) the amount of heat added in the burner, (C) the necessary air-to-fuel ratio of the engine, (D) the amount of power required by the compressor, and (E) the velocity of the exhaust stream at the exit of the system. Note: The variable rp is the compressor ratio defined to be the pressure of the compressor exit to the pressure of the compressor inlet. Assume that the compressor, turbine, and nozzle are all adiabatic and reversible. The Turbojet Engine 2 P = Pj : 100 kPa Burner T,: 300 k 6: 12 5= 1200 K FHV = 43 KJ/g- frel

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