A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of 100 and 1200 kPa. The working ﬂuid is air, which enters the compressor at 300K at a rate of 150 m3/min and leaves the turbine at 773K. Using variable speciﬁc heats for air and assuming a compressor isentropic eﬃciency of 82 percent and a turbine isentropic eﬃciency of 88 percent, determine:

(a) the net power output

(b) the back work ratio

(c) the thermal eﬃciency

In: Mechanical Engineering

Consider an ideal Ericsson cycle with air as the working ﬂuid executed in a steady-ﬂow system. Air is at a temperature of 270 degrees and a pressure of 120 kPa at the beginning of the isothermal compression process, during which 150 kJ/kg of heat is rejected. Heat transfer to air occurs at a temperature of 1200K. Determine

(a) the maximum pressure in the cycle

(b) the network output per unit mass of air

(c) the thermal eﬃciency of the cycle

In: Mechanical Engineering

Determine the maximum deflection on the Cantilever beam with a concentrated load p at the free end as shown

In: Mechanical Engineering

Printed on the side of a tire on an all-wheel-drive sport utility wagon is the warning “Do not inflate above 44 psi,” where psi is the abbreviation for the pressure unit pounds per square inch (lb/in^{2}). Express the tire’s maximum pressure rating in

(a) The USCS unit of lb/ft^{2} (psf) and

(b) the SI unit of kPa.

In: Mechanical Engineering

(a) How do you calculate hydrostatic force in gates?

(b) Calculate total hydrostatic force on the vertical gate. Also calculate the location of the hydrostatic force from top

In: Mechanical Engineering

Rigid bar ABC shown in Figure P1.30 is supported by a pin at bracket A and by tie rod (1). Tie rod (1) has a diameter of 5 mm, and it is supported by double-shear pin connections at B and D. The pin at bracket A is a single-shear connection. All pins are 7 mm in diameter. Assume a = 600 mm, b = 300 mm, h = 450 mm, P = 900 N, and θ = 55°. Determine the following:

(a) the normal stress in rod (1)

(b) the shear stress in pin B

(c) the shear stress in pin A

FIGURE P1.30

In: Mechanical Engineering

The jet transport \(B\) is flying north with a velocity \(v_{\mathrm{B}}=600 \mathrm{~km} / \mathrm{h}\) when a smaller aircraft \(A\) passes underneath the transport headed in the \(60^{\circ}\) direction shown. To passengers in \(B\), however, \(A\) appears to be flying sideways and moving east. Determine the actual velocity of \(A\) and the velocity which \(A\) appears to have relative to \(B\).

In: Mechanical Engineering