Saturated propane vapor at 200 psia is fed to a well-insulated
heat exchanger at a rate of 2600 standard cubic
feet per hour. The propane leaves the exchanger as a saturated
liquid (a liquid at its boiling point) at the same pressure.
Cooling water enters the exchanger at 70 oF. Flowing concurrently
(in the same direction) with the propane. The temperature
difference between the outlet streams (liquid propane and water) is
15 oF.
Estimate the required flow rate (lbm/h) of...
Water at 80°F and 20 psia is heated in a chamber by mixing it
with saturated water vapor at 20 psia. If both streams enter the
mixing chamber at the same mass flow rate, determine the
temperature and the quality of the exiting stream. Include a heat
loss rate of 200 kW and a net mass flow rate of the combined
streams of 4 lbm/s.
Steam is compressed to a saturated vapor state at constant
pressure. The steam started at 2 MPa and 365 C. What work was
required and what was the specific heat transfer?
Please show work so I can actually learn!
A vapor-compression refrigeration cycle working with R22
contains a liquid-to-suction heat exchanger. The saturated liquid
refrigerant at 40 °C leaving the condenser and entering the heat
exchanger is used to superheat the saturated vapor refrigerant
leaving the evaporator at 7 °C by 8 °C. If the compressor is
capable of pumping 5 l/s of vapor refrigerant measured at the inlet
to the compressor and the compression processes are considered
isentropic in both cases listed below, determine;
(a) The refrigerating capacity...
Q/ A vapor-compression refrigeration cycle working with R22
contains a liquid-to-suction
heat exchanger. The saturated liquid refrigerant at 40 °C leaving
the condenser and entering
the heat exchanger is used to superheat the saturated vapor
refrigerant leaving the evaporator
at 7 °C by 8 °C. If the compressor is capable of pumping 5 l/s of
vapor refrigerant measured
at the inlet to the compressor and the compression processes are
considered isentropic in
both cases listed below, determine;
(a) The refrigerating...
air is compressed in an adiabatic and isentropic compressor from
14 psia and 60F to 210 psia. Determine the outlet temperature [F]
and the work consumed by this compressor per unit mas of air
[Btu/lbm]. Assume constant specific heats at T=100F
Please explain table look ups, thank you!
A certain VOC compound has measured vapor pressures equal to
0.1316 psia at 31.65° F, and 0.2034 psia at 44.57° F. Determine the
constants A and B in a Classius-Claperon type equation for
estimating vapor pressures of this VOC. Use the equation to
estimate the vapor pressure of the VOC at 77.0 deg F. Ans. 0.55
psia.
The capacity of a propane vapor-compression refrigeration system
is 8 tons. Saturated vapor at 0°F enters the compressor, and
superheated vapor leaves at 120°F, 180 lbf/in.2 Heat
transfer from the compressor to its surroundings occurs at a rate
of 3.5 Btu per lb of refrigerant passing through the compressor.
Liquid refrigerant enters the expansion valve at 85°F, 180
lbf/in.2 The condenser is water-cooled, with water
entering at 65°F and leaving at 80°F with a negligible change in
pressure. Determine
(a)...
An air stream is saturated with a vapor (B) at 130F and 1 atm
pressure. It is cooled down to 80F where some of the B is
condensed and separated from the vapor stream. The remaining vapor
stream is then reheated back to 130F.
a. What is the mole fraction of B in the air coming out of the
process?
b. For an inlet flow rate of 2000 ft3/min of air saturated
with B, what would be the flow rate...
Methane is compressed adiabatically in a pipeline pumping
station from 3500 kPa and 35°C to 5500 kPa at a rate of 1.5 kg
mol·s−1. If the compressor efficiency is 0.78, what is the power
requirement of the compressor and what is the discharge temperature
of the methane? ( if you could explaine it step by step )