Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Chapter 40, Problem 10RQ
The seasonal energy efficiency ratio (SEER) includes the energy used in the _____and _____cycles.
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Octane is used as the working fluid in a gas-flow refrigeration cycle. The pressure ratio of the system is 5 and the octane enters the compressor at -15 oC.
Fluid temperature at turbine inlet
It is 70 oC. By accepting the adiabatic efficiency of the compressor and turbine as 80%;
a) the flow diagram of the cycle, T-s diagram of the cycle,
b) turbine inlet temperature,
c) the efficiency coefficient of the cycle,
d) find the highest and lowest temperatures of the cycle and e) find the required amount of fluid for 10 kW cooling load.
34. Four designs for a steam power plant are shown in the figure. a) Find the heat
supplied, the heat rejected, the net work, and the cycle thermodynamic efficiency
for each design. b) Compare the results and comment on the advantage of each
design.
T
540 F
540 F
900 F
b
540 F
540 F
b.
Cycle A
Cycle i
Cyclec
Cycle D
90 F
90 F
90 F
90 F
d
d
d
Multiple Choice. Choose the correct answer and show COMPLETEsolution. (Binary Cycle)
Chapter 40 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 40 - The standard design conditions for...Ch. 40 - The typical temperature relationship between a...Ch. 40 - The evaporator will normally operate at a(n)...Ch. 40 - A typical temperature relationship between a...Ch. 40 - How is condenser high efficiency obtained?Ch. 40 - High-efficiency air-conditioning systems may use...Ch. 40 - What does the head pressure do If the suction...Ch. 40 - What will cause the suction pressure to rise?Ch. 40 - The evaporator design temperature may in some...Ch. 40 - The seasonal energy efficiency ratio (SEER)...
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- In wind energy conversion system, if less blades are available on a wind turbine that leads to O a. higher torque and lesser rotational speed O b. lesser torque and lesser rotational speed O c. lesser torque and higher rotational speed O d. higher torque and higher rotational speedarrow_forwardRefrigerant 22 is the working fluid in a Carnot refrigeration cycle operating at steady state. The refrigerant enters the condenser as saturated vapor at 36°C and exits as saturated liquid. The evaporator operates at -30°C. Determine, in kJ per kg of refrigerant flowing, the net heat transfer in the cycle. A) 20.37 B 18.37 24.37 36.47arrow_forwardY7a please help me with the detailed solution and answerarrow_forward
- Figure on the right provides steady-state operatingdata for an ideal vapor-compression refrigeration cycle withRefrigerant 134a as the working fluid. The mass flow rate ofrefrigerant is 30.59 lb/min. Sketch the T–s diagram for thecycle and determinea) the compressor power, in horsepower.b) the rate of heat transfer, from the working fluid passingthrough the condenser, in Btu/min.c) the coefficient of performance.arrow_forward20. An air compressor has an inlet air enthalpy of 35 Btu/lb and exit enthalpy of 70 Btu/lb. The mass flow of air is 3 lbs/s. If heat loss is 466.62 Btu/min, find the work input to the compressor. B. 149.51 hp C. 159.51 hp D. 169.51 Hp A. 139.51 hp 21. In an air standard Otto cycle, the clearance volume is 12% of the displacement volume. Find the compression ratio and or thermal efficiency. A. 0.52 B. 0.55 C. 0.53 D. 0.60 22. A Carnot cycle has a maximum temperature of 220°C and minimum temperature of 20°C. Find the cycle efficiency. A. 54.23% B. 58.35% C. 43.20% D. 40.57% 23. An engine has a bore of 15 cm and stroke of 48 cm. If the volumetric compression is 2200 cm³, find the engine efficiency. A. 46.2 B. 44.2 C. 45.4 D. 40.3 24. A Carnot engine requires 40 KJ/sec from the hot source. The engine produces 20 kw of power and the temperature of the sink is 26°C. What is the temperature of the hot source? A. 245.57°C B. 210.10°C C. 250.18°C D. 325.00°C 25. The maximum thermal efficiency…arrow_forward2. A boiler produces a steam at 2.417 Mpa and 468.9oC. The steam enters a turbine where after the extraction of energy enters a steam condensing unit. The pressure inside the condenser is maintained at 0.1578 MPa. If the system operates on a simple Rankine cycle, solve for: a) heat added per cycle, b) heat rejected, c) cycle net work and d) the cycle thermal efficiency. (3 DECIMAL IN FINAL ANSWERS PLS THANK YOU)arrow_forward
- Based on the steam engine represented on the following figure, a) Describe the heat engine cycle and explain why it is useful. b) Describe the energy conversions that occur.arrow_forward14. PLEASE ANSWER ASAP THANK Uarrow_forward3. A diesel power plant provides power for Meralco in 20 hrs per day of operation. The industrial fuel used is 40 deg. API at 15.6 deg. C. The total consumption is 3500 L per day at 30 deg. C. Determine the following: a. Mass Flow Rate b. Total cost of fuel for an eight-week operation if total cost of fuel per gallon is 52 pesos.arrow_forward
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