4. (a) Draw a P-V diagram of a real refrigerator that uses 1 kg of HFC-134a...

4. (a) Draw a P-V diagram of a real refrigerator that uses 1 kg of HFC-134a as the working fluid.
Identify the compressor. condenser. throttle and the evaporator stages of the cycle and indicate
where heat Qc, is extracted from the cold refrigerator and where. Qa is released to the
environment. Also indicate where the refrigerant is in liquid. gas. or a mixed phase.

(b) Show that the COP = Qc(Qh -Qc) can be expressed in terms of the enthalpies at three points of the
cycle, explaining all steps of the derivation.

Expert Solution

samet mamat answered 3 years ago

a refrigerator uses refrigerant 134a as a working fluid and operates on the vapour -compression refrigiration...

a refrigerator uses refrigerant 134a as a working fluid and operates on the vapour -compression refrigiration cycle.the evaporator is maintained at -100C and the refrigirant is a dry saturated vapour as it leaves the evaporator. the compressor has an efficiency of 80%.the conditions at the outlet of the condensor are 300C and 9 bar. 1-if the mass flow rate of the refrigerant is 0,08kg/s workout the rate of heat removal from the refrigerant space.the power input to the cpmpressor and...

For each problem, sketch the appropriate process diagram on a T-v, P-v or P-h diagram 1)...

For each problem, sketch the appropriate process diagram on a T-v, P-v or P-h diagram 1) Oil enters the outer tube of an insulated concentric tube heat exchanger at a temperature of 500k, and exits at a temperature of 400k. The mass flow rate of the oil is 5 kg/s, and the oil has a specific heat of Cp=1.91 kJ/kg*K. Saturated liquid water at 100 degrees celsius enters the inner tube, and exits at 100 degrees celsius with a quality...

For each problem, sketch the appropriate process diagram on a T-v, P-v, or P-h diagram 4.60...

For each problem, sketch the appropriate process diagram on a T-v, P-v, or P-h diagram 4.60 : Steam exiting the turbine of a power plant passes through the insulated shell-and-tube heat exchanger condenser. The mass flow rate of the steam is 145 kg/s, and the steam enters the heat exchanger as a saturated mixture with a quality of 0.95 at 20 kPa. The steam exits the condenser as a saturated liquid at 20 kPa. Liquid cooling water is used to...

For the following exercises, given v, draw v, 3v and 1/2 v. 〈−1, 4〉

For the following exercises, given v, draw v, 3v and 1/2 v.⟨−1, 4⟩

Draw the interaction diagram (P-M diagram) of the column (16”x16” with 4#8 bars plus #3 tie...

Draw the interaction diagram (P-M diagram) of the column (16”x16” with 4#8 bars plus #3 tie @12”o.c). Assume fc’ is 5 ksi and fy is 60 ksi. (10 points)

For the following exercises, calculate u ⋅ v. Given v = 〈−3, 4〉 draw v, 2v, and 1/2 v.

For the following exercises, calculate u ⋅ v.Given v = 〈−3, 4⟩ draw v, 2v, and 1/2 v.

Let V = {P(x) ∈ P10(R) : P'(−4) = 0 and P''(2) = 0}. If V=...

Let V = {P(x) ∈ P10(R) : P'(−4) = 0 and P''(2) = 0}. If V= M3×n(R), ﬁnd n.

ROUND UP TO 4 DECIMAL PLACES. Draw and label the P-V & T-S diagrams. An Ideal...

ROUND UP TO 4 DECIMAL PLACES. Draw and label the P-V & T-S diagrams. An Ideal air standard dual-combustion cycle has a compression ratio of 15. At the start of the compression process, the air temperature and pressure are 30°C and 150kPa respectively. Heat addition takes place until the maximum cycle temperature reaches 1950°C and produces total heat of 1200 kJ/kg. Determine (a) Temperature, specific volume and Pressure at each state, (b) Net work output (kJ/kg), and (c) thermal efficiency....

ROUND UP TO 4 DECIMAL PLACES. Draw and label the P-V & T-S diagrams. A gas...

ROUND UP TO 4 DECIMAL PLACES. Draw and label the P-V & T-S diagrams. A gas turbine power plant operates on simple Brayton cycle with air as the working fluid. The pressure ratio is 12. Temperature at the compressor inlet is 300 K, while at the turbine inlet the temperature is 1000 K. Determine (a) the efficiency and (b) the net work output per kg of air. (c) Mass flow rate (kg/s) to produce 70,000 kW.

ROUND UP TO 4 DECIMAL PLACES. Draw and label the P-V & T-S diagrams. Given an...

ROUND UP TO 4 DECIMAL PLACES. Draw and label the P-V & T-S diagrams. Given an ideal air-standard Diesel cycle has a compression ratio of 15. Temperature and Pressure at the start of compression process is 70°F and 1atm. 800 BTU/lbm of Heat is added to the system. Determine (a) Temperature, specific volume and Pressure at each state, (b) Efficiency, and (c) the mass flow rate of air (lbm/min), required to produce 200 hp.

Question