A two-pass shell and tube heat exchanger has an overall conductance of 450 W/m^{2 o}C when used as a condenser for a large air conditioning system. Refrigerant R-134a enters thecondenser at 20 kg/ s as a saturated vapor at 70^oC and leaves as a saturated liquid. If cooling water enters at a rate of 60 L/s, 10^oC, determine the outlet temperature of the cooling water and the effective area of the condenser.

Explain the principle of a critical radius when adding isolation to pipes

Sailplanes use updrafts to stay aloft for hours at a time. Near one particular airfield, a stone quarry (with very dark rocks) surrounded by a wooden area provides a particularly regular source for updrafts on hot days. With your knowledge of heat transfer, explain the processes that create the updraft

With your knowledge of heat transfer, explain how birds regulate their temperature

Compute the elastic modulus for the following metal alloys, whose stress-strain behaviors may be observed in the "Tensile Tests" module of Virtual Materials Science and Engineering (VMSE): (a) titanium, (b) tempered steel, (c) aluminum, and (d) carbon steel. How do these values compare with those presented in Table 6.1 for the same metals?

What is steady-state error? What is the type of the system?

What is the steady-state error of type 0, type 1, and type 2 systems for step signal, ramp signal, and parabolic signal, respectively?

A refrigerator with a cooling capacity of 5 ton uses ammonia as the working fluid. The condenser and evaporator maintain a pressure of 1500 kPa and 200 kPa respectively. The compressor has an isentropic efficiency of 80%. If the vapor leaving the evaporator is superheated by 5°C and the liquid leaving the condenser is supercooled by 5°C, determine:
a) The power input to the compressor

b) The mass flow rate of ammonia

c) The COP of the refrigerator

Give me the refernces please

what is the maximum? temperture and minimum for Airbus 320-200 ? Give me the refernces please

what is the maxiumum speed and altitude ? Give me the refernces please

where is the location of the fuel tank ?   Give me the refernces please

After additively manufacturing a part, many manufacturers will perform Hot Isostatic Pressing (HIP) to remove pores from the material. These pores form naturally as part of the process of additive manufacturing, and negatively affect the fatigue life and mechanical properties of the part. After HIP, the material often becomes soft since the high temperature of the process also removes the microstructure.

What process would you use to strengthen the material after the HIP process without changing shape of the part, and why?

The elevator starts from rest at the first floor of the building and comes to a complete stop at the 6th floor. It can accelerate at 6 ft/s² and then decelerate at 2 ft/s² Determine the shortest time is takes to reach the 6th floor, which is 60 ft above the ground. Draw the v?t and s?t graphs for the motion of the elevator.

Using an iron-carbon phase diagram and the lever rule , calculate the expected phases and volume fraction of each phase at room temperature for the a) the 0.20 wt.% C steel and b) the 0.45 wt.% C steel. Draw the equilibrium microstructure you would expect at room temperature for each steel.

what alloying elements affect the machinability of steel alloys?

what are advantages and disadvantages of welding over other joining processes?

Find at least one example of each of these three promotional tools in the current press, Internet, TV, or other media source: advertising, public relations (PR), and personal selling. For each promotional tool example you found, describe how the companies are using the tools, and what the tools are meant to accomplish. Are promotional tools successful in delivering the company’s message?

An Otto Cycle has air operating as the working fluid. The air begins the compression process at 90 kPa and 40oC. During the heat addition process, the maximum temperature of the air (T3) is 2000oC. The compression ratio of the cycle is 9.2. Treating this as a “Hot Air Standard Cycle”, determine the temperature and pressure at the end of each process, the net work per kg of air produced in the cycle, the thermal efficiency of the cycle, and the mean effective pressure.

Consider a 9 mm diameter circular tube, calculate the length of tube that is required to transfer 100 W of
water that circulates through the tube at a rate of 0.08 kg / s.
The temperature of the water is kept constant at 50 ° C and the wall
of the tube is maintained at 45 ° C.